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)
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 and Extended Temperature Devices Available
8-pin PDIP, 8-lead JEDEC SOIC, and 14-lead and 20-lead 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
are essential. The AT25080/160/320/640 is available in space saving 8-pin PDIP, 8-
lead JEDEC SOIC, and 14-lead and 20-lead TSSOP packages.
(continued)
SPI Serial
EEPROMs
8K (1024 x 8)
16K (2048 x 8)
32K (4096 x 8)
64K (8192 x 8)
AT25080
AT25160
AT25320
AT25640
Pin Configuration
Pin Name
CS
SCK
SI
SO
GND
VCC
WP
HOLD
NC
DC
Function
Chip Select
Serial Data Clock
Serial Data Input
Serial Data Output
Ground
Power Supply
Write Protect
Suspends Serial Input
No Connect
Don’t Connect
14-lead TSSOP
CS
SO
NC
NC
NC
WP
GND
1
2
3
4
5
6
7
14
13
12
11
10
9
8
VCC
HOLD
NC
NC
NC
SCK
SI
8-pin PDIP
CS
SO
WP
GND
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
CS
SO
WP
GND
8-lead SOIC
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
20-lead TSSOP*
NC
CS
SO
SO
NC
NC
WP
GND
DC
NC
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
NC
VCC
HOLD
HOLD
NC
NC
SCK
SI
DC
NC
Note:
*Pins 3, 4 and 17, 18 are internally connected
for 14-lead TSSOP socket compatibility.
Rev. 0675F–08/01
1
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 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 pro-
vided 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.
Absolute Maximum Ratings*
Operating Temperature.................................. -55°C to +125°C
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
*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.
Block Diagram
2
AT25080/160/320/640
0675F–08/01
AT25080/160/320/640
Pin Capacitance
(1)
Applicable over recommended operating range from T
A
= 25
°
C, f = 1.0 MHz, V
CC
= +5.0V (unless otherwise noted).
Symbol
C
OUT
C
IN
Note:
Test Conditions
Output Capacitance (SO)
Input Capacitance(CS, SCK, SI, WP, HOLD)
1. This parameter is characterized and is not 100% tested.
Max
8
6
Units
pF
pF
Conditions
V
OUT
= 0V
V
IN
= 0V
DC Characteristics
(1)
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
V
CC1
V
CC2
V
CC3
I
CC1
I
CC2
I
SB1
I
SB2
I
SB3
I
IL
I
OL
V
IL(1)
V
IH(1)
V
OL1
V
OH1
V
OL2
V
OH2
Note:
Parameter
Supply Voltage
Supply Voltage
Supply Voltage
Supply Current
Supply Current
Standby Current
Standby Current
Standby Current
Input Leakage
Output Leakage
Input Low-voltage
Input High-voltage
Output Low-voltage
Output High-voltage
Output Low-voltage
Output High-voltage
1.8V
≤
V
CC
≤
3.6V
4.5V
≤
V
CC
≤
5.5V
I
OL
= 3.0 mA
I
OH
= -1.6 mA
I
OL
= 0.15 mA
I
OH
= -100 µA
V
CC
- 0.2
V
CC
- 0.8
0.2
V
CC
= 5.0V at 1 MHz, SO = Open, Read
V
CC
= 5.0V at 2 MHz, SO = Open,
Read, Write
V
CC
= 1.8V, CS = V
CC
V
CC
= 2.7V, CS = V
CC
V
CC
= 5.0V, CS = V
CC
V
IN
= 0V to V
CC
V
IN
= 0V to V
CC
, T
AC
= 0°C to 70°C
-3.0
-3.0
-0.6
V
CC
x 0.7
3.0
V
CC
x 0.3
V
CC
+ 0.5
0.4
0.1
0.2
2.0
Test Condition
Min
1.8
2.7
4.5
Typ
Max
3.6
5.5
5.5
3.0
5.0
1.0
2.0
5.0
Units
V
V
V
mA
mA
µA
µA
µA
µA
µA
V
V
V
V
V
V
1. V
IL
min and V
IH
max are reference only and are not tested.
3
0675F–08/01
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
SCK Clock Frequency
Voltage
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
133
200
800
133
200
800
250
250
1000
250
250
1000
250
250
1000
50
50
100
50
50
100
100
100
400
200
200
400
0
0
0
0
0
0
133
200
800
ns
Min
0
0
0
Max
3.0
2.1
0.5
2
2
2
2
2
2
Units
MHz
f
SCK
t
RI
Input Rise Time
µs
t
FI
Input Fall Time
µs
t
WH
SCK High Time
ns
t
WL
SCK Low Time
ns
t
CS
CS High Time
ns
t
CSS
CS Setup Time
ns
t
CSH
CS Hold Time
ns
t
SU
Data In Setup Time
ns
t
H
Data In Hold Time
ns
t
HD
Hold Setup Time
t
CD
Hold Hold Time
t
V
Output Valid
ns
t
HO
Output Hold Time
ns
4
AT25080/160/320/640
0675F–08/01
AT25080/160/320/640
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
Hold to Output Low Z
Voltage
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
4.5 - 5.5
2.7 - 5.5
1.8 - 3.6
1M
Min
0
0
0
Max
100
100
100
100
100
100
250
250
1000
5
10
20
Units
ns
t
LZ
t
HZ
Hold to Output High Z
ns
t
DIS
Output Disable Time
ns
t
WC
Write Cycle Time
ms
Endurance
(1)
Note:
5.0V, 25°C, Page Mode
Write Cycles
1. This parameter is characterized and is not 100% tested.
5
0675F–08/01
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