Atmel AT25080B, Atmel AT25160B
Atmel AT25320B, Atmel AT25640B
SPI Automotive Temperature Serial EEPROMs
8K (1024 x 8), 16K (2048 x 8), 32K (4096 x 8), 64K (8192 x 8)
DATASHEET
Features
Serial Peripheral Interface (SPI) compatible
Supports SPI Modes 0 (0,0) and 3 (1,1)
Data sheet describes Mode 0 operation
V
CC
= 2.5V to 5.5V
Medium-voltage and standard-voltage operation
Extended temperature range –40C to 125C
5MHz 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 (5ms max)
High reliability
Endurance: one million write cycles
Data retention: 100 years
8-lead JEDEC SOIC and 8-lead TSSOP packages
Description
The Atmel
®
AT25080B/160B/320B/640B provides 8192/16384/32768/65536 bits of
Serial Electrically-Erasable Programmable Read-Only Memory (EEPROM) organized
as 1024/2048/4096/8192 words of eight bits each. The device is optimized for use in
many automotive applications where low-power and low-voltage operation are
essential. AT25080B/160B/320B/640B is available in space-saving 8-lead JEDEC SOIC
and 8-lead TSSOP packages.
AT25080B/160B/320B/640B 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 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.
8803C–SEEPROM–12/2012
1.
Absolute Maximum Ratings*
Operating Temperature
40C
to +125C
Storage Temperature
65C
to +150C
Voltage on any pin
with respect to ground1.0V to +7.0V
Maximum Operating Voltage . . . . . . . . . . . . . . . 6.25V
DC Output Current. . . . . . . . . . . . . . . . . . . . . . . 5.0mA
*Notice: Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent
damage 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.
2.
Block Diagram
V
CC
GND
Status
Register
Memory Array
1024/2048/
4096/8192 x 8
Address
Decoder
Data
Register
SI
Mode
Decode
Logic
Output
Buffer
CS
WP
SCK
Clock
Generator
SO
HOLD
Atmel AT25080B/160B/320B/640B Automotive [DATASHEET]
8803C–SEEPROM–12/2012
3
3.
3.1
Electrical Characteristics
Pin Capacitance
(1)
Applicable at these conditions, unless otherwise noted. T
A
= 25C, f = 1.0MHz, V
CC
= +5.0V.
Symbol
C
OUT
C
IN
Test Conditions
Output Capacitance (SO)
Input Capacitance (CS, SCK, SI, WP, HOLD)
Max
8
6
Units
pF
pF
Conditions
V
OUT
= 0V
V
IN
= 0V
Note:
1.
This parameter is characterized and is not 100% tested.
3.2
DC Characteristics
Applicable over recommended operating range from: T
A
=
40C
to +125C, V
CC
= +2.5V to +5.5V.
Symbol
V
CC1
I
CC1
I
CC2
I
CC3
I
SB1
I
SB2
I
IL
I
OL
V
IL(1)
V
IH(1)
V
OL1
V
OH1
Parameter
Supply Voltage
Supply Current
Supply Current
Supply Current
Standby Current
Standby Current
Input Leakage
Output Leakage
Input Low-voltage
Input High-voltage
Output Low-voltage
Output High-voltage
2.5V
V
CC
5.5V
I
OL
= 3.0mA
I
OH
=
1.6mA
V
CC
0.8
V
CC
= 5.0V at 5MHz,
SO = Open, Read
V
CC
= 5.0V at 1MHz
V
CC
= 5.0V at 5MHz,
SO = Open, Read, Write
V
CC
= 2.5V, CS = V
CC
V
CC
= 5.0V, CS = V
CC
V
IN
= 0V to V
CC
V
IN
= 0V to V
CC
3.0
3.0
0.6
V
CC
x 0.7
3.0
V
CC
x 0.3
V
CC
+ 0.5
0.4
0.2
2.0
Test Condition
Min
2.5
Typ
Max
5.5
6.0
3.0
7.0
10.0
13.0
Units
V
mA
mA
mA
μA
μA
μA
μA
V
V
V
V
Note:
1.
V
IL
min and V
IH
max are reference only and are not tested.
Atmel AT25080B/160B/320B/640B Automotive [DATASHEET]
8803C–SEEPROM–12/2012
4
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