© 2009 Microchip Technology Inc.

Preliminary

DS22131C-page 1

25LC080C 25LC320A

25LC080D 25LC640A

25LC160C

25LC128

25LC160D

25LC256

Features:

• Max. Clock 5 MHz

• Low-power CMOS Technology:

- Max. Write Current: 5 mA at 5.5V, 5 MHz

- Read Current: 5 mA at 5.5V, 5 MHz

- Standby Current: 10

μA at 5.5V

• 1024 x 8 through 32768 x 8-bit Organization

• Byte and Page-level Write Operations

• Self-timed Erase and Write Cycles (6 ms max.)

• Block Write Protection:

- Protect none, 1/4, 1/2 or all of array

• Built-in Write Protection:

- Power-on/off data protection circuitry

- Write enable latch

- Write-protect pin

• Sequential Read

• High Reliability:

- Endurance: >1M erase/write cycles

- Data retention: > 200 years

- ESD protection: > 4000V

• Temperature Range Supported:

• Package is Pb-free and RoHS Compliant

Pin Function Table

Description:

Microchip Technology Inc. 25LCXXX* devices are Mid-

density 8 through 256 Kbit Serial Electrically Erasable

PROMs (EEPROM). The devices are organized in

blocks of x8-bit memory and support the Serial Periph-

eral Interface (SPI) compatible serial bus architecture.

Byte-level and page-level functions are supported.

The bus signals required are a clock input (SCK) plus

separate data in (SI) and data out (SO) lines. Access to

the device is controlled through a Chip Select (CS)

input.

Communication to the device can be paused via the

hold pin (HOLD). While the device is paused, transi-

tions on its inputs will be ignored, with the exception of

Chip Select, allowing the host to service higher priority

interrupts.

The 25LCXXX is available in a standard 8-lead SOIC

package. The package is Pb-free.

Package Types (not to scale)

- Extended (H):

-40°C to +150°C

Name

Function

CS

Chip Select Input

SO

Serial Data Output

WP

Write-Protect

Ground

SI

Serial Data Input

SCK

Serial Clock Input

HOLD

Hold Input

Supply Voltage

CS

SO

WP

1

2

3

4

8

7

6

5

HOLD

SCK

SI

SOIC

(SN)

8K-256K SPI Serial EEPROM High Temp Family Data Sheet

*25LCXXX is used in this document as a generic part number for the 25 series devices.