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SPI modes 0,0 and 1,1

3 MHz Clock Rate

Single 5V supply

Low Power CMOS Technology

- Max Write Current: 5 mA

- Read Current: 1.0 mA

- Standby Current: 1

碌

A typical

Organization

- 1024 x 8 for 25C080

- 2048 x 8 for 25C160

16 Byte Page

Self-timed ERASE and WRITE Cycles

Sequential Read

Block Write Protection

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

Built-in Write Protection

- Power On/Off Data Protection Circuitry

- Write Latch

- Write Protect Pin

High Reliability

- Endurance: 10M cycles (guaranteed)

- Data Retention: >200 years

- ESD protection: >4000 V

8-pin PDIP/SOIC Packages

Temperature ranges supported

- Commercial (C):

0

擄

C to +70

擄

C

- Industrial (I):

-40

擄

C to +85

擄

C

- Automotive (E):

-40藲C to +125藲C

PACKAGE TYPES

PDIP

CS

SO

WP

V

SS

1

25C080/160

2

3

4

8

7

6

5

V

CC

HOLD

SCK

SI

鈥?/div>

SOIC

CS

SO

WP

V

SS

1

25C080/160

8

7

6

5

V

CC

HOLD

SCK

SI

2

3

4

鈥?/div>

BLOCK DIAGRAM

Status

Register

HV Generator

DESCRIPTION

The Microchip Technology Inc. 25C080/160 are 8K and

16K bit Serial Electrically Erasable PROMs. The mem-

ory is accessed via a simple Serial Peripheral Interface

(SPI) compatible serial bus. 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, allowing any number

of devices to share the same bus.

There are two other inputs that provide the end user

with additional 鏗俥xibility. Communication to the device

can be paused via the hold pin (HOLD). While the

device is paused, transitions on its inputs will be

ignored, with the exception of chip select, allowing the

host to service higher priority interrupts. Also write

operations to the Status Register can be disabled via

the write protect pin (WP).

WP

SI

SO

CS

SCK

HOLD

Sense Amp.

R/W Control

Y Decoder

EEPROM

I/O Control

Logic

Memory

Control

Logic

X

Dec

Page Latches

Array

Vcc

Vss

SPI is a trademark of Motorola.

漏

1996 Microchip Technology Inc.

Preliminary

This document was created with FrameMaker 4 0 4

DS21147F-page 1

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