2024年9月5日发(作者：代抒怀)
查询AT27LV520供应商
Features
•
8-Bit Multiplexed Addresses/Outputs
•
Fast Read Access Time - 90 ns
•
Dual Voltage Range Operation
–Low-Voltage Power Supply Range, 3.0V to 3.6V, or
–Standard 5V
±
10% Supply Range
•
Low Power CMOS Operation
–20
µ
A max. Standby for ALE = V
IH
and V
CC
= 3.6V
–29 mW max. Active at 5 MHz for V
•
CC
= 3.6V
20-Lead TSSOP Package
•
High Reliability CMOS Technology
–2,000V ESD Protection
–200 mA Latchup Immunity
•
Rapid
™
Programming Algorithm - 50
µ
s/byte (typical)
•
CMOS and TTL Compatible Inputs and Outputs
–JEDEC Standard for LVTTL
•
Integrated Product Identification Code
•
Commercial and Industrial Temperature Range
Description
The AT27LV520 is a low-power, high-performance 524,288-bit one-time programma-
ble read only memory (OTP EPROM) organized 64K by 8 bits. It incorporates latches
for the 8 lower order address bits to multiplex with the 8 data bits. This minimizes sys-
tem chip count, reduces cost, and simplifies the design of multiplexed bus systems. It
requires only one power supply in the range of 3.0V to 3.6V for normal read mode
operation, making it ideal for fast, portable systems using battery power. Any byte can
be accessed in less than 90 ns.
The AT27LV520 is available in 173 mil, 20-pin TSSOP, 300 mil, 20-pin SOIC and 28-
pin TSOP, one-time programmable (OTP) plastic packages.
(continued)
Pin Configurations
TSSOP Top View
Pin NameFunction
A8 - A15Addresses
A10120A8
A12219AD1
AD0 - AD7Addresses/Outputs
A14318AD3
ALE417AD5
OE /V
VCC516AD7
PP
Output Enable/V
PP
OE/VPP615GND
A15714AD6
ALEAddress Latch Enable
A13813AD4
A11912AD2
A91011AD0
TSOP Top View
A1022
21A8
SOIC Top View
NC23
20NC
NC24
19NC
A1225
18AD1
A1426
17AD3
OE/VPP120VCC
ALE27
16AD5
A15219ALE
VCC
28
15AD7
A13318A14
OE/VPP
1
14GND
A11417A12
A152
13AD6
A9516A10
A133
12AD4
AD0615A8
A114
11AD2
AD2714AD1
NC5
10NC
AD4813AD3
NC6
9NC
AD6912AD5
A97
8AD0
GND1011AD7
512K (64K x 8)
Multiplexed
Addresses/
Outputs
Low Voltage
OTP EPROM
AT27LV520
Rev. 0911B-B–01/98
1
Atmel’s innovative design techniques provide fast speeds
that rival 5V parts while keeping the low power consump-
tion of a 3.3V supply. At V
CC
= 3.0V, any byte can be
accessed in less than 90 ns. With a typical power dissipa-
tion of only 18 mW at 5 MHz and V
CC
= 3.3V, the
AT27LV520 consumes less than one fifth the power of a
standard 5V EPROM. Standby mode is acheived by assert-
ing ALE high. Standby mode supply current is typically less
than 1 µA at 3.3V.
The AT27LV520 operating with V
CC
at 3.0V produces TTL
level outputs that are compatible with standard TTL logic
devices operating at V
CC
= 5.0V. The device is also capa-
ble of standard 5-volt operation making it ideally suited for
dual supply range systems or card products that are plug-
gable in both 3-volt and 5-volt hosts.
Atmel’s AT27LV520 has additional features to ensure high
quality and efficient production use. The Rapid
™
Program-
ming Algorithm reduces the time required to program the
part and guarantees reliable programming. Programing
time is typically only 50 µs/byte. The Integrated Product
Identification Code electronically identifies the device and
manufacturer. This feature is used by industry standard
programming equipment to select the proper programming
algorithms and voltages. The AT27LV520 programs exactly
the same way as a standard 5V AT27C520 and uses the
same programming equipment.
System Considerations
Switching under active conditions may produce transient
voltage excursions. Unless accommodated by the system
design, these transients may exceed data sheet limits,
resulting in device non-conformance. At a minimum, a 0.1
µF high frequency, low inherent inductance, ceramic
capacitor should be utilized for each device. This capacitor
should be connected between the V
CC
and Ground termi-
nals of the device, as close to the device as possible. Addi-
tionally, to stabilize the supply voltage level on printed cir-
cuit boards with large EPROM arrays, a 4.7 µF bulk elec-
trolytic capacitor should be utilized, again connected
between the V
CC
and Ground terminals. This capacitor
should be positioned as close as possible to the point
where the power supply is connected to the array.
Block Diagram
V
CC
GND
OE/VPP
ALE
OE, ALE, AND
PROGRAM LOGIC
OUTPUT
BUFFERS
8
L
A
T
C
H
E
S
Y DECODERY-GATING
AD7 - AD0
A15 - A8
8
X DECODERCELL MATRIX
IDENTIFICATION
2
AT27LV520
AT27LV520
Absolute Maximum Ratings*
Temperature -55°C to +125°C
.-65°C to +150°C
Voltage on Any Pin with
Respect -2.0V to +7.0V
(1)
Voltage on A9 with
Respect to Ground .....................................-2.0V to +14.0V
(1)
Note:
V
PP
Supply Voltage with
Respect -2.0V to +14.0V
(1)
1.
*NOTICE:Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent dam-
age to the device. This is a stress rating only and
functional operation of the device at these or any
other conditions beyond those indicated in the
operational sections of this specification is not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect device
reliability.
Minimum voltage is -0.6V DC which may under-
shoot to -2.0V for pulses of less than 20 ns. Max-
imum output pin voltage is V
CC
+ 0.75V DC
which may overshoot to +7.0V for pulses of less
than 20 ns.
Operating Modes
Mode/Pin
Read
(2)
Output Disable
(2)
Standby
Address Latch Enable
(2)
Rapid Program
(3)
Product Identification
(4)
Notes:
ALE
V
IL
V
IL
/V
IH
V
IH
V
IH
V
IH
V
IL
OE/V
PP
V
IL
V
IH
V
IH
V
IH
V
PP
V
IL
A8 - A15
Ai
X
(1)
Ai
X
Ai
A9 = V
H
(5)
A8 = V
IH
or V
IL
A10 - A15 = V
IL
AD0 - AD7
D
OUT
High Z/A0 - A7
A0 - A7
A0-A7
D
IN
Identification Code
1.X can be V
IL
or V
IH.
, output disable, and standby modes require 3.0V ≤ V
CC
≤ 3.6V, or 4.5V ≤ V
CC
≤ 5.5V.
to Programming Characteristics.
4.V
H
= 12.0 ± 0.5V.
identifier bytes may be selected. All A8 - A15 inputs are held low (V
IL
), except A9 which is set to V
H
and A8 which is tog-
gled low (V
IL
) to select the Manufacturer’s Identification byte and high (V
IH
) to select the Device Code byte.
3
DC and AC Operating Conditions for Read Operation
AT27LV520-90
Operating Temp. (Case)
Com.
Ind.
0°C - 70°C
-40°C - +85°C
3.0V to 3.6V
5V ± 10%
V
CC
Supply
DC and Operating Characteristics for Read Operation
SymbolParameterConditionMinMaxUnits
V
CC
= 3.0V to 3.6V
I
LI
I
LO
I
SB
(1)
I
CC
V
IL
V
IH
V
OL
V
OH
Input Load Current
Output Leakage Current
V
CC
Standby Current
V
CC
Active Current
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
I
OL
= 2.0 mA
I
OH
= -2.0 mA2.4
V
IN
= 0V to V
CC
V
OUT
= 0V to V
CC
ALE = V
CC
± 0.3V; Ai, ADi = GND/V
CC
± 0.3V
f = 5 MHz, I
OUT
= 0 mA, ALE = V
IL
-0.6
2.0
±1
±5
20
8
0.8
V
CC
+ 0.5
0.4
µA
µA
µA
mA
V
V
V
V
V
CC
= 4.5V to 5.5V
I
LI
I
LO
I
SB
(1)
I
CC
V
IL
V
IH
V
OL
V
OH
Input Load Current
Output Leakage Current
V
CC
Standby Current
V
CC
Active Current
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
I
OL
= 2.1 mA
I
OH
= -400 µA2.4
V
IN
= 0V to V
CC
V
OUT
= 0V to V
CC
ALE = V
CC
± 0.3V; Ai, ADi = GND/V
CC
± 0.3V
f = 5 MHz, I
OUT
= 0 mA, ALE = V
IL
-0.6
2.0
±1
±5
100
20
0.8
V
CC
+ 0.5
0.4
µA
µA
µA
mA
V
V
V
Note:V
CC
standby current will be slightly higher with ALE, Ai, and ADi at TTL levels.
AC Characteristics for Read Operation
V
CC
= 3.0V to 3.6V and 4.5V to 5.5V
AT27LV520-90
Symbol
t
ACC
(3)
t
CE
t
AS
t
AH
t
ALE
t
OE
(3)
t
DF
(4)(5)
t
OH
Parameter
Address to Output Delay
Address Latch Enable Low to Output Delay
Address Setup Time
Address Hold Time
Address Latch Enable Width
OE/V
PP
to Output Delay
OE/V
PP
High to Output Float
Output Hold from Address or OE/V
PP
, whichever occurred first
Condition
ALE = OE/V
PP
= V
IL
Address Valid
OE/V
PP
= V
IH
OE/V
PP
= V
IH
OE/V
PP
= V
IH
ALE = V
IL
ALE = V
IL
ALE = V
IL
0
15
15
45
35
25
MinMax
90
70
Units
ns
ns
ns
ns
ns
ns
ns
ns
Notes:2, 3, 4 — see AC Waveforms for Read Operation
4
AT27LV520
AT27LV520
AC Waveforms for Read Operation
(1)
tALE
ALE
tCE
OE/V
PP
tDF
tAS
AD7 - AD0ADDRESS IN
tACC
A15 - A8
Notes:1.
2.
3.
4.
5.
Timing measurement reference levels for all speed grades are V
OL
= 0.8V and V
OH
= 2.0V. Input AC drive levels are V
IL
=
0.45V and V
IH
= 2.4V.
OE/V
PP
may be delayed up to t
CE
- t
OE
after the address is valid without impact on t
CE
.
OE/V
PP
may be delayed up to t
ACC
- t
OE
after the address is valid without impact on t
ACC
.
This parameter is only sampled and is not 100% tested.
Output float is defined as the point when data is no longer driven.
tAHtOE
tOH
DATA OUT
Input Test Waveforms and Measurement LevelsOutput Test Load
t
R
, t
F
< 20 ns (10% to 90%)
Note:C
L
= 100 pF including jig
capacitance.
Pin Capacitance
(Note:)
(f = 1 MHz, T = 25
°
C)
Typ
C
IN
C
OUT
Note:
Max
6
12
Units
pF
pF
Conditions
V
IN
= 0V
V
OUT
= 0V
4
8
Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.
5
Programming Waveforms
PROGRAM
V
CC
6.5V
5.0V
tVCS
13V
OE/V
PP
V
IH
V
IL
tPRT
ALE
V
IH
V
IL
tLP
tALE
tLAS
ADDR
tAS
A15 - A8
V
IH
V
IL
ADDRESS STABLE
tLAH
tPW
tDS
DATA IN
tDH
tALE
tOE
AD7 - AD0
V
IH
V
IL
tLAS
ADDR
tLAH
DATA OUT
tAH
tDFP
tOES
tOEH
tVR
READ (VERIFY)
Notes:1.
2.
The Input Timing Reference is 0.8V for V
IL
and 2.0V for V
IH
.
t
OE
and t
DFP
are characteristics of the device but must be accommodated by the programmer.
DC Programming Characteristics
T
A
= 25
±
5
°
C, V
CC
= 6.5
±
0.25V, OE/V
PP
= 13.0
±
0.25V
Limits
Symbol
I
LI
V
IL
V
IH
V
OL
V
OH
I
CC2
I
PP2
Parameter
Input Load Current
Input Low Level
Input High Level
Output Low Voltage
Output High Voltage
V
CC
Supply Current (Program and Verify)
OE/V
PP
CurrentALE = V
IH
I
OL
= 2.1 mA
I
OH
= -400
µ
A2.4
25
25
Test Conditions
V
IN
= V
IL
, V
IH
-0.6
2.0
MinMax
±
10
0.8
V
CC
+ 1.0
0.4
Units
µ
A
V
V
V
V
mA
mA
6
AT27LV520
AT27LV520
AC Programming Characteristics*
T
A
= 25 ± 5°C, V
CC
= 6.5 ± 0.25V, OE/V
PP
= 13.0 ± 0.25V
Limits
Symbol
t
ALE
t
LAS
t
LAH
t
LP
t
OES
t
OEH
t
DS
t
DH
t
PW
t
VR
t
VCS
t
OE
t
DFP
t
AS
t
AH
t
PRT
Notes:
Parameter
(1)
Address Latch Enable Width
Latched Address Setup Time
Latched Address Hold Time
ALE Low to OE/V
PP
High Voltage Delay
OE/V
PP
Setup Time
OE/V
PP
Hold Time
Data Setup Time
Data Hold Time
ALE Program Pulse Width
(2)
OE/V
PP
Recovery Time
V
CC
Setup Time
Data Valid from OE/V
PP
OE/V
PP
High to Output Float Delay
(4)
Address Setup Time
Address Hold Time
OE/V
PP
Pulse Rise Time During
Programming
Test ConditionsMin
500
100
100
2
MaxUnits
ns
ns
ns
µs
µs
µs
µs
µs
Input Rise and Fall Times
(10% to 90%) 20 ns
Input Pulse Levels
0.45V to 2.4V
Input Timing Reference Level
0.8V to 2.0V
Output Timing Reference Level
0.8V to 2.0V
2
2
2
2
47.5
2
2
150
0
2
0
50
130
52.5µs
µs
µs
ns
ns
µs
µs
ns
1.V
CC
must be applied simultaneously or before OE/V
PP
and removed simultaneously or after OE/V
PP
.
m Pulse width tolerance is 50
µ
sec
±
5%.
parameter is only sampled and is not 100% tested. Output Float is defined as the point where data is no longer driven
—see timing diagram.
Atmel’s 27LV520 Integrated Product Identification Code
Pins
Codes
Manufacturer
Device Type
A8
0
1
AD7
0
1
AD6
0
0
AD5
0
0
AD4
1
1
AD3
1
1
AD2
1
1
AD1
1
0
AD0
0
1
Hex
Data
1E
9D
7
Rapid
™
Programming Algorithm
A 50
µ
s ALE pulse width is used to program. The address
is set to the first location. V
CC
is raised to 6.5V and OE/V
PP
is raised to 13.0V. Each address is first programmed with
one 50
µ
s ALE pulse without verification. Then a verifica-
tion/reprogramming loop is executed for each address. In
the event a byte fails to pass verification, up to 10 succes-
sive 50
µ
s pulses are applied with a verification after each
pulse. If the byte fails to verify after 10 pulses have been
applied, the part is considered failed. After the byte verifies
properly, the next address is selected until all have been
checked. OE/V
PP
is then lowered to V
IH
and V
CC
to 5.0V.
All bytes are read again and compared with the original
data to determine if the device passes or fails.
8
START
ADDR = FIRST LOCATION
V
CC
= 6.5V
V
PP
= 13.0V
PROGRAMONE 50µS PULSE
INCREMENT
NO
ADDRESS
ADDR.?
LAST
YES
ADDR = FIRST LOCATION
INCREMENT
ADDRESS
X = 0
NO
LAST
PASS
ADDR.?
VERIFY
FAIL
BYTE
INCREMENT X
YES
PROGRAMONE 100µS PULSE
NO
X = 10?
V
YES
V
CC
= 5.0V
PP
= 5.0V
COMPARE
FAIL
DEVICE
TO ORIGINAL
ALL BYTES
FAILED
DATA
PASS
DEVICE
PASSED
AT27LV520
AT27LV520
Ordering Information
t
ACC
(ns)
90
I
CC
(mA)
Active
8
Ordering Code
AT27LV520-90SC
AT27LV520-90TC
AT27LV520-90XC
AT27LV520-90SI
AT27LV520-90TI
AT27LV520-90XI
Package
20S
28T
20X
20S
28T
20X
Operation Range
Commercial
(0°C to 70°C)
Industrial
(-40°C to +85°C)
908
Package Type
20S
28T
20X
20-Lead, 0.300” Wide, Plastic Gull-Wing Small Outline (SOIC)
28-Lead, Thin Small Outline Package (TSOP)
20-Lead, 0.173” Wide, Thin Shrink Small Outline (TSSOP)
9
Packaging Information
20S
, 20-Lead, 0.300” Wide,
Plastic Gull Wing Small Outline
Dimensions in Inches and (Millimeters)
28T
, 28-Lead, Plastic Thin Small Outline Package
(TSOP)
Dimensions in Millimeters and (Inches)
.020(.508)
.013(.330)
.299(7.60).420(10.7)
.291(7.39)
.393(9.98)
PIN 1 ID
.050(1.27) BSC
.513(13.0)
.497(12.6)
.105(2.67)
.092(2.34)
.012(.305)
.003(.076)
.013(.330)
.009(.229)
0
REF
8
.035(0.889)
.015(.381)
20X
, 20-Lead, 0.173” Wide, Thin Super Small Outline
Package (TSSOP)
Dimensions in (Millimeters) and Inches
0.30(0.012)
0.18(0.007)
4.48(.176)6.50(.256)
4.30(.169)
6.25(.246)
PIN 1 ID
0.65(.0256) BSC
6.60(.260)
6.40(.252)
1.10(0.043) MAX
0.15(.006)
0.05(.002)
0.18(.007)
0.09(.003)
0
REF
8
0.70(.028)
0.50(.020)
10
AT27LV520
Copyright © Each Manufacturing Company.
All Datasheets cannot be modified without permission.
This datasheet has been download from :
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2024年9月5日发(作者：代抒怀)
查询AT27LV520供应商
Features
•
8-Bit Multiplexed Addresses/Outputs
•
Fast Read Access Time - 90 ns
•
Dual Voltage Range Operation
–Low-Voltage Power Supply Range, 3.0V to 3.6V, or
–Standard 5V
±
10% Supply Range
•
Low Power CMOS Operation
–20
µ
A max. Standby for ALE = V
IH
and V
CC
= 3.6V
–29 mW max. Active at 5 MHz for V
•
CC
= 3.6V
20-Lead TSSOP Package
•
High Reliability CMOS Technology
–2,000V ESD Protection
–200 mA Latchup Immunity
•
Rapid
™
Programming Algorithm - 50
µ
s/byte (typical)
•
CMOS and TTL Compatible Inputs and Outputs
–JEDEC Standard for LVTTL
•
Integrated Product Identification Code
•
Commercial and Industrial Temperature Range
Description
The AT27LV520 is a low-power, high-performance 524,288-bit one-time programma-
ble read only memory (OTP EPROM) organized 64K by 8 bits. It incorporates latches
for the 8 lower order address bits to multiplex with the 8 data bits. This minimizes sys-
tem chip count, reduces cost, and simplifies the design of multiplexed bus systems. It
requires only one power supply in the range of 3.0V to 3.6V for normal read mode
operation, making it ideal for fast, portable systems using battery power. Any byte can
be accessed in less than 90 ns.
The AT27LV520 is available in 173 mil, 20-pin TSSOP, 300 mil, 20-pin SOIC and 28-
pin TSOP, one-time programmable (OTP) plastic packages.
(continued)
Pin Configurations
TSSOP Top View
Pin NameFunction
A8 - A15Addresses
A10120A8
A12219AD1
AD0 - AD7Addresses/Outputs
A14318AD3
ALE417AD5
OE /V
VCC516AD7
PP
Output Enable/V
PP
OE/VPP615GND
A15714AD6
ALEAddress Latch Enable
A13813AD4
A11912AD2
A91011AD0
TSOP Top View
A1022
21A8
SOIC Top View
NC23
20NC
NC24
19NC
A1225
18AD1
A1426
17AD3
OE/VPP120VCC
ALE27
16AD5
A15219ALE
VCC
28
15AD7
A13318A14
OE/VPP
1
14GND
A11417A12
A152
13AD6
A9516A10
A133
12AD4
AD0615A8
A114
11AD2
AD2714AD1
NC5
10NC
AD4813AD3
NC6
9NC
AD6912AD5
A97
8AD0
GND1011AD7
512K (64K x 8)
Multiplexed
Addresses/
Outputs
Low Voltage
OTP EPROM
AT27LV520
Rev. 0911B-B–01/98
1
Atmel’s innovative design techniques provide fast speeds
that rival 5V parts while keeping the low power consump-
tion of a 3.3V supply. At V
CC
= 3.0V, any byte can be
accessed in less than 90 ns. With a typical power dissipa-
tion of only 18 mW at 5 MHz and V
CC
= 3.3V, the
AT27LV520 consumes less than one fifth the power of a
standard 5V EPROM. Standby mode is acheived by assert-
ing ALE high. Standby mode supply current is typically less
than 1 µA at 3.3V.
The AT27LV520 operating with V
CC
at 3.0V produces TTL
level outputs that are compatible with standard TTL logic
devices operating at V
CC
= 5.0V. The device is also capa-
ble of standard 5-volt operation making it ideally suited for
dual supply range systems or card products that are plug-
gable in both 3-volt and 5-volt hosts.
Atmel’s AT27LV520 has additional features to ensure high
quality and efficient production use. The Rapid
™
Program-
ming Algorithm reduces the time required to program the
part and guarantees reliable programming. Programing
time is typically only 50 µs/byte. The Integrated Product
Identification Code electronically identifies the device and
manufacturer. This feature is used by industry standard
programming equipment to select the proper programming
algorithms and voltages. The AT27LV520 programs exactly
the same way as a standard 5V AT27C520 and uses the
same programming equipment.
System Considerations
Switching under active conditions may produce transient
voltage excursions. Unless accommodated by the system
design, these transients may exceed data sheet limits,
resulting in device non-conformance. At a minimum, a 0.1
µF high frequency, low inherent inductance, ceramic
capacitor should be utilized for each device. This capacitor
should be connected between the V
CC
and Ground termi-
nals of the device, as close to the device as possible. Addi-
tionally, to stabilize the supply voltage level on printed cir-
cuit boards with large EPROM arrays, a 4.7 µF bulk elec-
trolytic capacitor should be utilized, again connected
between the V
CC
and Ground terminals. This capacitor
should be positioned as close as possible to the point
where the power supply is connected to the array.
Block Diagram
V
CC
GND
OE/VPP
ALE
OE, ALE, AND
PROGRAM LOGIC
OUTPUT
BUFFERS
8
L
A
T
C
H
E
S
Y DECODERY-GATING
AD7 - AD0
A15 - A8
8
X DECODERCELL MATRIX
IDENTIFICATION
2
AT27LV520
AT27LV520
Absolute Maximum Ratings*
Temperature -55°C to +125°C
.-65°C to +150°C
Voltage on Any Pin with
Respect -2.0V to +7.0V
(1)
Voltage on A9 with
Respect to Ground .....................................-2.0V to +14.0V
(1)
Note:
V
PP
Supply Voltage with
Respect -2.0V to +14.0V
(1)
1.
*NOTICE:Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent dam-
age to the device. This is a stress rating only and
functional operation of the device at these or any
other conditions beyond those indicated in the
operational sections of this specification is not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect device
reliability.
Minimum voltage is -0.6V DC which may under-
shoot to -2.0V for pulses of less than 20 ns. Max-
imum output pin voltage is V
CC
+ 0.75V DC
which may overshoot to +7.0V for pulses of less
than 20 ns.
Operating Modes
Mode/Pin
Read
(2)
Output Disable
(2)
Standby
Address Latch Enable
(2)
Rapid Program
(3)
Product Identification
(4)
Notes:
ALE
V
IL
V
IL
/V
IH
V
IH
V
IH
V
IH
V
IL
OE/V
PP
V
IL
V
IH
V
IH
V
IH
V
PP
V
IL
A8 - A15
Ai
X
(1)
Ai
X
Ai
A9 = V
H
(5)
A8 = V
IH
or V
IL
A10 - A15 = V
IL
AD0 - AD7
D
OUT
High Z/A0 - A7
A0 - A7
A0-A7
D
IN
Identification Code
1.X can be V
IL
or V
IH.
, output disable, and standby modes require 3.0V ≤ V
CC
≤ 3.6V, or 4.5V ≤ V
CC
≤ 5.5V.
to Programming Characteristics.
4.V
H
= 12.0 ± 0.5V.
identifier bytes may be selected. All A8 - A15 inputs are held low (V
IL
), except A9 which is set to V
H
and A8 which is tog-
gled low (V
IL
) to select the Manufacturer’s Identification byte and high (V
IH
) to select the Device Code byte.
3
DC and AC Operating Conditions for Read Operation
AT27LV520-90
Operating Temp. (Case)
Com.
Ind.
0°C - 70°C
-40°C - +85°C
3.0V to 3.6V
5V ± 10%
V
CC
Supply
DC and Operating Characteristics for Read Operation
SymbolParameterConditionMinMaxUnits
V
CC
= 3.0V to 3.6V
I
LI
I
LO
I
SB
(1)
I
CC
V
IL
V
IH
V
OL
V
OH
Input Load Current
Output Leakage Current
V
CC
Standby Current
V
CC
Active Current
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
I
OL
= 2.0 mA
I
OH
= -2.0 mA2.4
V
IN
= 0V to V
CC
V
OUT
= 0V to V
CC
ALE = V
CC
± 0.3V; Ai, ADi = GND/V
CC
± 0.3V
f = 5 MHz, I
OUT
= 0 mA, ALE = V
IL
-0.6
2.0
±1
±5
20
8
0.8
V
CC
+ 0.5
0.4
µA
µA
µA
mA
V
V
V
V
V
CC
= 4.5V to 5.5V
I
LI
I
LO
I
SB
(1)
I
CC
V
IL
V
IH
V
OL
V
OH
Input Load Current
Output Leakage Current
V
CC
Standby Current
V
CC
Active Current
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
I
OL
= 2.1 mA
I
OH
= -400 µA2.4
V
IN
= 0V to V
CC
V
OUT
= 0V to V
CC
ALE = V
CC
± 0.3V; Ai, ADi = GND/V
CC
± 0.3V
f = 5 MHz, I
OUT
= 0 mA, ALE = V
IL
-0.6
2.0
±1
±5
100
20
0.8
V
CC
+ 0.5
0.4
µA
µA
µA
mA
V
V
V
Note:V
CC
standby current will be slightly higher with ALE, Ai, and ADi at TTL levels.
AC Characteristics for Read Operation
V
CC
= 3.0V to 3.6V and 4.5V to 5.5V
AT27LV520-90
Symbol
t
ACC
(3)
t
CE
t
AS
t
AH
t
ALE
t
OE
(3)
t
DF
(4)(5)
t
OH
Parameter
Address to Output Delay
Address Latch Enable Low to Output Delay
Address Setup Time
Address Hold Time
Address Latch Enable Width
OE/V
PP
to Output Delay
OE/V
PP
High to Output Float
Output Hold from Address or OE/V
PP
, whichever occurred first
Condition
ALE = OE/V
PP
= V
IL
Address Valid
OE/V
PP
= V
IH
OE/V
PP
= V
IH
OE/V
PP
= V
IH
ALE = V
IL
ALE = V
IL
ALE = V
IL
0
15
15
45
35
25
MinMax
90
70
Units
ns
ns
ns
ns
ns
ns
ns
ns
Notes:2, 3, 4 — see AC Waveforms for Read Operation
4
AT27LV520
AT27LV520
AC Waveforms for Read Operation
(1)
tALE
ALE
tCE
OE/V
PP
tDF
tAS
AD7 - AD0ADDRESS IN
tACC
A15 - A8
Notes:1.
2.
3.
4.
5.
Timing measurement reference levels for all speed grades are V
OL
= 0.8V and V
OH
= 2.0V. Input AC drive levels are V
IL
=
0.45V and V
IH
= 2.4V.
OE/V
PP
may be delayed up to t
CE
- t
OE
after the address is valid without impact on t
CE
.
OE/V
PP
may be delayed up to t
ACC
- t
OE
after the address is valid without impact on t
ACC
.
This parameter is only sampled and is not 100% tested.
Output float is defined as the point when data is no longer driven.
tAHtOE
tOH
DATA OUT
Input Test Waveforms and Measurement LevelsOutput Test Load
t
R
, t
F
< 20 ns (10% to 90%)
Note:C
L
= 100 pF including jig
capacitance.
Pin Capacitance
(Note:)
(f = 1 MHz, T = 25
°
C)
Typ
C
IN
C
OUT
Note:
Max
6
12
Units
pF
pF
Conditions
V
IN
= 0V
V
OUT
= 0V
4
8
Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested.
5
Programming Waveforms
PROGRAM
V
CC
6.5V
5.0V
tVCS
13V
OE/V
PP
V
IH
V
IL
tPRT
ALE
V
IH
V
IL
tLP
tALE
tLAS
ADDR
tAS
A15 - A8
V
IH
V
IL
ADDRESS STABLE
tLAH
tPW
tDS
DATA IN
tDH
tALE
tOE
AD7 - AD0
V
IH
V
IL
tLAS
ADDR
tLAH
DATA OUT
tAH
tDFP
tOES
tOEH
tVR
READ (VERIFY)
Notes:1.
2.
The Input Timing Reference is 0.8V for V
IL
and 2.0V for V
IH
.
t
OE
and t
DFP
are characteristics of the device but must be accommodated by the programmer.
DC Programming Characteristics
T
A
= 25
±
5
°
C, V
CC
= 6.5
±
0.25V, OE/V
PP
= 13.0
±
0.25V
Limits
Symbol
I
LI
V
IL
V
IH
V
OL
V
OH
I
CC2
I
PP2
Parameter
Input Load Current
Input Low Level
Input High Level
Output Low Voltage
Output High Voltage
V
CC
Supply Current (Program and Verify)
OE/V
PP
CurrentALE = V
IH
I
OL
= 2.1 mA
I
OH
= -400
µ
A2.4
25
25
Test Conditions
V
IN
= V
IL
, V
IH
-0.6
2.0
MinMax
±
10
0.8
V
CC
+ 1.0
0.4
Units
µ
A
V
V
V
V
mA
mA
6
AT27LV520
AT27LV520
AC Programming Characteristics*
T
A
= 25 ± 5°C, V
CC
= 6.5 ± 0.25V, OE/V
PP
= 13.0 ± 0.25V
Limits
Symbol
t
ALE
t
LAS
t
LAH
t
LP
t
OES
t
OEH
t
DS
t
DH
t
PW
t
VR
t
VCS
t
OE
t
DFP
t
AS
t
AH
t
PRT
Notes:
Parameter
(1)
Address Latch Enable Width
Latched Address Setup Time
Latched Address Hold Time
ALE Low to OE/V
PP
High Voltage Delay
OE/V
PP
Setup Time
OE/V
PP
Hold Time
Data Setup Time
Data Hold Time
ALE Program Pulse Width
(2)
OE/V
PP
Recovery Time
V
CC
Setup Time
Data Valid from OE/V
PP
OE/V
PP
High to Output Float Delay
(4)
Address Setup Time
Address Hold Time
OE/V
PP
Pulse Rise Time During
Programming
Test ConditionsMin
500
100
100
2
MaxUnits
ns
ns
ns
µs
µs
µs
µs
µs
Input Rise and Fall Times
(10% to 90%) 20 ns
Input Pulse Levels
0.45V to 2.4V
Input Timing Reference Level
0.8V to 2.0V
Output Timing Reference Level
0.8V to 2.0V
2
2
2
2
47.5
2
2
150
0
2
0
50
130
52.5µs
µs
µs
ns
ns
µs
µs
ns
1.V
CC
must be applied simultaneously or before OE/V
PP
and removed simultaneously or after OE/V
PP
.
m Pulse width tolerance is 50
µ
sec
±
5%.
parameter is only sampled and is not 100% tested. Output Float is defined as the point where data is no longer driven
—see timing diagram.
Atmel’s 27LV520 Integrated Product Identification Code
Pins
Codes
Manufacturer
Device Type
A8
0
1
AD7
0
1
AD6
0
0
AD5
0
0
AD4
1
1
AD3
1
1
AD2
1
1
AD1
1
0
AD0
0
1
Hex
Data
1E
9D
7
Rapid
™
Programming Algorithm
A 50
µ
s ALE pulse width is used to program. The address
is set to the first location. V
CC
is raised to 6.5V and OE/V
PP
is raised to 13.0V. Each address is first programmed with
one 50
µ
s ALE pulse without verification. Then a verifica-
tion/reprogramming loop is executed for each address. In
the event a byte fails to pass verification, up to 10 succes-
sive 50
µ
s pulses are applied with a verification after each
pulse. If the byte fails to verify after 10 pulses have been
applied, the part is considered failed. After the byte verifies
properly, the next address is selected until all have been
checked. OE/V
PP
is then lowered to V
IH
and V
CC
to 5.0V.
All bytes are read again and compared with the original
data to determine if the device passes or fails.
8
START
ADDR = FIRST LOCATION
V
CC
= 6.5V
V
PP
= 13.0V
PROGRAMONE 50µS PULSE
INCREMENT
NO
ADDRESS
ADDR.?
LAST
YES
ADDR = FIRST LOCATION
INCREMENT
ADDRESS
X = 0
NO
LAST
PASS
ADDR.?
VERIFY
FAIL
BYTE
INCREMENT X
YES
PROGRAMONE 100µS PULSE
NO
X = 10?
V
YES
V
CC
= 5.0V
PP
= 5.0V
COMPARE
FAIL
DEVICE
TO ORIGINAL
ALL BYTES
FAILED
DATA
PASS
DEVICE
PASSED
AT27LV520
AT27LV520
Ordering Information
t
ACC
(ns)
90
I
CC
(mA)
Active
8
Ordering Code
AT27LV520-90SC
AT27LV520-90TC
AT27LV520-90XC
AT27LV520-90SI
AT27LV520-90TI
AT27LV520-90XI
Package
20S
28T
20X
20S
28T
20X
Operation Range
Commercial
(0°C to 70°C)
Industrial
(-40°C to +85°C)
908
Package Type
20S
28T
20X
20-Lead, 0.300” Wide, Plastic Gull-Wing Small Outline (SOIC)
28-Lead, Thin Small Outline Package (TSOP)
20-Lead, 0.173” Wide, Thin Shrink Small Outline (TSSOP)
9
Packaging Information
20S
, 20-Lead, 0.300” Wide,
Plastic Gull Wing Small Outline
Dimensions in Inches and (Millimeters)
28T
, 28-Lead, Plastic Thin Small Outline Package
(TSOP)
Dimensions in Millimeters and (Inches)
.020(.508)
.013(.330)
.299(7.60).420(10.7)
.291(7.39)
.393(9.98)
PIN 1 ID
.050(1.27) BSC
.513(13.0)
.497(12.6)
.105(2.67)
.092(2.34)
.012(.305)
.003(.076)
.013(.330)
.009(.229)
0
REF
8
.035(0.889)
.015(.381)
20X
, 20-Lead, 0.173” Wide, Thin Super Small Outline
Package (TSSOP)
Dimensions in (Millimeters) and Inches
0.30(0.012)
0.18(0.007)
4.48(.176)6.50(.256)
4.30(.169)
6.25(.246)
PIN 1 ID
0.65(.0256) BSC
6.60(.260)
6.40(.252)
1.10(0.043) MAX
0.15(.006)
0.05(.002)
0.18(.007)
0.09(.003)
0
REF
8
0.70(.028)
0.50(.020)
10
AT27LV520
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