1
Features
Serial Peripheral Interface (SPI) Compatible
Supports SPI Modes 0 (0,0) and 3 (1,1)
Low Voltage and Standard Voltage Operation
5.0 (V
CC
= 4.5V to 5.5V)
2.7 (V
CC
= 2.7V to 5.5V)
1.8 (V
CC
= 1.8V to 3.6V)
2.1 MHz Clock Rate
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: 1 Million Write Cycles
Data Retention: 100 Years
ESD Protection: >4000V
Automotive Grade and Extended Temperature Devices Available
8-Pin PDIP, JEDEC SOIC, and 14-Pin and 20-Pin TSSOP Packages
Description
The AT25080/160/320/640 provides 8192/16384/32768/65536 bits of serial electri-
cally erasable programmable read only memory (EEPROM) organized 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
SPI Serial
EEPROMs
8K (1024 x 8)
16K (2048 x 8)
32K (4096 x 8)
64K (8192 x 8)
AT25080
AT25160
AT25320
AT25640
Rev. 0675C08/98
(continued)
Pin Configuration
Pin Name
Function
CS
Chip Select
SCK
Serial Data Clock
SI
Serial Data Input
SO
Serial Data Output
GND
Ground
V
CC
Power Supply
WP
Write Protect
HOLD
Suspends Serial Input
NC
No Connect
DC
Don't Connect
8-Pin PDIP
1
2
3
4
8
7
6
5
CS
SO
WP
GND
VCC
HOLD
SCK
SI
8-Pin 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
20-Lead TSSOP*
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
NC
CS
SO
SO
NC
NC
WP
GND
DC
NC
NC
VCC
HOLD
HOLD
NC
NC
SCK
SI
DC
NC
*Pins 3, 4 and 17, 18 are internally connected for 14-lead TSSOP socket compatibility.
AT25080/160/320/640
2
are essential. The AT25080/160/320/640 is available in
space saving 8-pin PDIP, JEDEC SOIC, and 14-pin and
20-pin TSSOP packages.
The AT25080/160/320/640 is enabled through the Chip
Select pin (CS) and accessed via a 3-wire interface con-
sisting of Serial Data Input (SI), Serial Data Output (SO),
and Serial Clock (SCK). All programming cycles are com-
pletely self-timed, and no separate ERASE cycle is
required before WRITE.
BLOCK WRITE protection is enabled by programming the
status register with one of four blocks of write protection.
Separate 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 +125
C
*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 +150
C
Voltage on Any Pin
with Respect to Ground .....................................-1.0V to +7.0V
Maximum Operating Voltage........................................... 6.25V
DC Output Current........................................................ 5.0 mA
AT25080/160/320/640
3
Note:
1. This parameter is characterized and is not 100% tested.
Note:
1. V
IL
min and V
IH
max are reference only and are not tested.
Pin Capacitance
(1)
Applicable over recommended operating range from T
A
= 25
C, f = 1.0 MHz, V
CC
= +5.0V (unless otherwise noted).
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
DC Characteristics
Applicable over recommended operating range from: T
AI
= -40
C to +85
C, V
CC
= +1.8V to +5.5V, T
AC
= 0
C to +70
C,
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
3.0
mA
I
CC2
Supply Current
V
CC
= 5.0V at 2 MHz, SO = Open
5.0
mA
I
SB1
Standby Current
V
CC
= 1.8V, CS = V
CC
0.1
A
I
SB2
Standby Current
V
CC
= 2.7V, CS = V
CC
0.2
0.5
A
I
SB3
Standby Current
V
CC
= 5.0V, CS = V
CC
0.5
2.0
A
I
IL
Input Leakage
V
IN
= 0V to V
CC
-3.0
3.0
A
I
OL
Output Leakage
V
IN
= 0V to V
CC
,
T
AC
= 0
C to 70
C
-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
AT25080/160/320/640
4
AC Characteristics
Applicable over recommended operating range from T
A
= -40
C to +85
C, 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 - 3.6
0
0
0
2.1
2.1
0.5
MHz
t
RI
Input Rise Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
2
2
2
s
t
FI
Input Fall Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
2
2
2
s
t
WH
SCK High Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
200
200
800
ns
t
WL
SCK Low Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
200
200
800
ns
t
CS
CS High Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
250
250
1000
ns
t
CSS
CS Setup Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
250
250
1000
ns
t
CSH
CS Hold Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
250
250
1000
ns
t
SU
Data In Setup Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
50
50
100
ns
t
H
Data In Hold Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
50
50
100
ns
t
HD
Hold Setup Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
100
100
400
t
CD
Hold Hold Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
200
200
400
ns
t
V
Output Valid
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
0
0
0
200
200
800
ns
t
HO
Output Hold Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
0
0
0
ns
AT25080/160/320/640
5
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 - 3.6
0
0
0
100
100
100
ns
t
HZ
Hold to Output High Z
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
100
100
100
ns
t
DIS
Output Disable Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
250
250
1000
ns
t
WC
Write Cycle Time
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
5
10
20
ms
Endurance
(1)
5.0V, 25C, Page Mode
1M
Write Cycles
AC Characteristics (Continued)
Applicable over recommended operating range from T
A
= -40
C to +85
C, V
CC
= As Specified,
CL = 1 TTL Gate and 100 pF (unless otherwise noted).
Symbol
Parameter
Voltage
Min
Max
Units
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