1
Features
Serial Peripheral Interface (SPI) Compatible
Supports SPI Modes 0 (0,0) and 3 (1,1)
Low-voltage and Standard-voltage Operation
2.7 (V
CC
= 2.7V to 5.5V)
1.8 (V
CC
= 1.8V to 5.5V)
3.0 MHz Clock Rate (5V)
32-byte Page Mode
Block Write Protection
Protect 1/4, 1/2, or Entire Array
Write Protect (WP) Pin and Write Disable Instructions for
both Hardware and Software Data Protection
Self-timed Write Cycle (5 ms Typical)
High-reliability
Endurance: One Million Write Cycles
Data Retention: 100 Years
Automotive Grade Devices Available
8-lead PDIP, 8-lead JEDEC SOIC and 14-lead TSSOP Packages
Description
The AT25080/160/320/640 provides 8192/16384/32768/65536 bits of serial electri-
cally-erasa ble programmable read only m emor y (EEPROM) org anized as
1024/2048/4096/8192 words of 8 bits each. The device is optimized for use in many
industrial and commercial applications where low-power and low-voltage operation
are essential. The AT25080/160/320/640 is available in space saving 8-lead PDIP, 8-
lead JEDEC SOIC and 14-lead TSSOP packages.
The AT25080/160/320/640 is enabled through the Chip Select pin (CS) and accessed
via a 3-wire interface consisting of Serial Data Input (SI), Serial Data Output (SO), and
Serial Clock (SCK). All programming cycles are completely self-timed, and no sepa-
rate ERASE cycle is required before WRITE.
SPI Serial
EEPROMs
8K (1024 x 8)
16K (2048 x 8)
32K (4096 x 8)
64K (8192 x 8)
AT25080
AT25160
AT25320
AT25640
Rev. 0675KSEEPR03/03
Pin Configuration
Pin Name
Function
CS
Chip Select
SCK
Serial Data Clock
SI
Serial Data Input
SO
Serial Data Output
GND
Ground
VCC
Power Supply
WP
Write Protect
HOLD
Suspends Serial Input
NC
No Connect
DC
Don't Connect
8-lead PDIP
1
2
3
4
8
7
6
5
CS
SO
WP
GND
VCC
HOLD
SCK
SI
8-lead SOIC
1
2
3
4
8
7
6
5
CS
SO
WP
GND
VCC
HOLD
SCK
SI
14-lead TSSOP
1
2
3
4
5
6
7
14
13
12
11
10
9
8
CS
SO
NC
NC
NC
WP
GND
VCC
HOLD
NC
NC
NC
SCK
SI
2
AT25080/160/320/640
0675KSEEPR03/03
BLOCK WRITE protection is enabled by programming the status register with one of four blocks of write protection. Sepa-
rate program enable and program disable instructions are provided for additional data protection. Hardware data protection
is provided via the WP pin to protect against inadvertent write attempts to the status register. The HOLD pin may be used to
suspend any serial communication without resetting the serial sequence.
Block Diagram
Absolute Maximum Ratings*
Operating Temperature.................................. -55
C to +125C
*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.
Storage Temperature ..................................... -65
C to +150C
Voltage on Any Pin
with Respect to Ground .....................................-1.0V to +7.0V
Maximum Operating Voltage .......................................... 6.25V
DC Output Current........................................................ 5.0 mA
3
AT25080/160/320/640
0675KSEEPR03/03
Pin Capacitance
(1)
Note:
1. This parameter is characterized and is not 100% tested.
DC Characteristics
(1)
Note:
1. V
IL
min and V
IH
max are reference only and are not tested.
Applicable over recommended operating range from T
A
= 25
C, f = 1.0 MHz, V
CC
= +5.0V (unless otherwise noted).
Symbol
Test Conditions
Max
Units
Conditions
C
OUT
Output Capacitance (SO)
8
pF
V
OUT
= 0V
C
IN
Input Capacitance(CS, SCK, SI, WP, HOLD)
6
pF
V
IN
= 0V
Applicable over recommended operating range from: T
AI
= -40
C to +85C, V
CC
= +1.8V to +5.5V, V
CC
= +1.8V to +5.5V
(unless otherwise noted).
Symbol Parameter
Test
Condition
Min
Typ
Max
Units
V
CC1
Supply
Voltage
1.8
3.6
V
V
CC2
Supply Voltage
2.7
5.5
V
V
CC3
Supply
Voltage
4.5
5.5
V
I
CC1
Supply
Current
V
CC
= 5.0V at 1 MHz, SO = Open, Read
3.0
mA
I
CC2
Supply
Current
V
CC
= 5.0V at 2 MHz, SO = Open,
Read, Write
5.0
mA
I
SB1
Standby
Current
V
CC
= 1.8V, CS = V
CC
0.1
1.0
A
I
SB2
Standby
Current
V
CC
= 2.7V, CS = V
CC
0.2
2.0
A
I
SB3
Standby Current
V
CC
= 5.0V, CS = V
CC
2.0
5.0
A
I
IL
Input
Leakage
V
IN
= 0V to V
CC
-3.0
A
I
OL
Output Leakage
V
IN
= 0V to V
CC
, T
AC
= 0C to 70C
-3.0
3.0
A
V
IL
(1)
Input Low-voltage
-0.6
V
CC
x 0.3
V
V
IH
(1)
Input High-voltage
V
CC
x 0.7
V
CC
+ 0.5
V
V
OL1
Output
Low-voltage
4.5V
V
CC
5.5V
I
OL
= 3.0 mA
0.4
V
V
OH1
Output High-voltage
I
OH
= -1.6 mA
V
CC
- 0.8
V
V
OL2
Output Low-voltage
1.8V
V
CC
3.6V
I
OL
= 0.15 mA
0.2
V
V
OH2
Output High-voltage
I
OH
= -100 A
V
CC
- 0.2
V
4
AT25080/160/320/640
0675KSEEPR03/03
AC Characteristics
Applicable over recommended operating range from T
AI
= -40
C to +85C, V
CC
= As Specified, CL = 1 TTL Gate and
100 pF (unless otherwise noted).
Symbol
Parameter
Voltage
Min
Max
Units
f
SCK
SCK Clock Frequency
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
0
0
0
3.0
2.1
0.5
MHz
t
RI
Input Rise Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
2
2
2
s
t
FI
Input Fall Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
2
2
2
s
t
WH
SCK High Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
133
200
800
ns
t
WL
SCK Low Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
133
200
800
ns
t
CS
CS High Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
250
250
1000
ns
t
CSS
CS Setup Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
250
250
1000
ns
t
CSH
CS Hold Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
250
250
1000
ns
t
SU
Data In Setup Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
50
50
100
ns
t
H
Data In Hold Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
50
50
100
ns
t
HD
Hold Setup Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
100
100
400
t
CD
Hold Hold Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
200
200
400
ns
t
V
Output Valid
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
0
0
0
133
200
800
ns
t
HO
Output Hold Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
0
0
0
ns
5
AT25080/160/320/640
0675KSEEPR03/03
Note:
1. This parameter is characterized and is not 100% tested.
t
LZ
Hold to Output Low Z
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
0
0
0
100
100
100
ns
t
HZ
Hold to Output High Z
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
100
100
100
ns
t
DIS
Output Disable Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
250
250
1000
ns
t
WC
Write Cycle Time
4.5 - 5.5
2.7 - 5.5
1.8 - 5.5
5
10
20
ms
Endurance
(1)
5.0V, 25C, Page Mode
1M
Write Cycles
AC Characteristics (Continued)
Applicable over recommended operating range from T
AI
= -40
C to +85C, V
CC
= As Specified, CL = 1 TTL Gate and
100 pF (unless otherwise noted).
Symbol
Parameter
Voltage
Min
Max
Units
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