AT25640 EEPROMs Datasheet

AT25640 Datasheet, PDF, Equivalent


Part Number

AT25640

Description

SPI Serial EEPROMs

Manufacture

ATMEL Corporation

Total Page 21 Pages
Datasheet
Download AT25640 Datasheet


AT25640
Features
Serial Peripheral Interface (SPI) Compatible
Supports SPI Modes 0 (0,0) and 3 (1,1)
Low-voltage and Standard-voltage Operation
– 2.7 (VCC = 2.7V to 5.5V)
– 1.8 (VCC = 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-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-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
Pin Configuration
Pin Name
CS
Function
Chip Select
SCK
SI
SO
Serial Data Clock
Serial Data Input
Serial Data Output
GND
VCC
WP
HOLD
Ground
Power Supply
Write Protect
Suspends Serial Input
NC No Connect
DC Don’t Connect
8-lead PDIP
CS
SO
WP
GND
1
2
3
4
8 VCC
7 HOLD
6 SCK
5 SI
8-lead SOIC
CS
SO
WP
GND
1
2
3
4
8 VCC
7 HOLD
6 SCK
5 SI
14-lead TSSOP
CS
SO
NC
NC
NC
WP
GND
1
2
3
4
5
6
7
14 VCC
13 HOLD
12 NC
11 NC
10 NC
9 SCK
8 SI
0675M–SEEPR–9/03
1

AT25640
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.
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
0675M–SEEPR–9/03


Features Features • Serial Peripheral Interface (SPI) Compatible • Supports SPI Mode s 0 (0,0) and 3 (1,1) • Low-voltage a nd Standard-voltage Operation – 2.7 ( VCC = 2.7V to 5.5V) – 1.8 (VCC = 1.8V to 5.5V) • 3.0 MHz Clock Rate (5V) 32-byte Page Mode • Block Write Pr otection – Protect 1/4, 1/2, or Entir e Array • Write Protect (WP) Pin and Write Disable Instructions for both Har dware and Software Data Protection • Self-timed Write Cycle (5 ms Typical) High-reliability – Endurance: One Million Write Cycles – Data Retention : 100 Years • Automotive Grade Device s Available • 8-lead PDIP, 8-lead JED EC SOIC and 14-lead TSSOP Packages Desc ription The AT25080/160/320/640 provide s 8192/16384/32768/65536 bits of serial electrically-erasable programmable rea d only memory (EEPROM) organized as 102 4/2048/4096/8192 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 .
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