© 1996 Microchip Technology Inc.

DS21125B-page 1

FEATURES

• Voltage operating range: 4.5V to 5.5V

- Maximum write current 3 mA at 5.5V

- Maximum read current 150

µA at 5.5V

- Standby current 1

µA typical

• 1 MHz SE2.bus two wire protocol

• Up to eight devices may be connected to the

same bus for up to 512K bits total memory

• Programmable block security options

• Programmable endurance options

• Schmitt trigger inputs for noise suppression

• Self-timed ERASE and WRITE cycles

• Power on/off data protection circuitry

• Endurance:

- 10,000,000 E/W cycles guaranteed for a 4K

block

- 1,000,000 E/W cycles guaranteed for a 60K

block

• Variable page size up to 64 bytes

• 8 byte x 8 line input cache (64 bytes)

for fast write loads

• <3 ms typical write cycle time, byte or page

• Electrostatic discharge protection > 4000V

• Data retention > 200 years

• 8-pin PDIP/SOIC packages

• Temperature ranges

DESCRIPTION

The Microchip Technology Inc. 24FC65 is a “smart”

8K 8x 8 Serial Electrically Erasable PROM (EEPROM)

with a high-speed 1MHz SE2.bus whose protocol is

This device has been developed for advanced applica-

tions such as personal communications, and provides

the systems designer with flexibility through the use of

many new user-programmable features. The 24FC65

offers a relocatable 4K-bit block of ultra-high-endurance

memory for data that changes frequently. The remain-

der of the array, or 60K bits, is rated at 1,000,000

ERASE/WRITE (E/W) cycles guaranteed. The 24FC65

features an input cache for fast write loads with a

capacity of eight pages, or 64 bytes. This device also

features programmable security options for E/W pro-

- Commercial (C):

0

°C to +70°C

- Industrial (I):

-40

°C to +85°C

tection of critical data and/or code of up to fifteen 4K

blocks. Functional address lines allow the connection of

up to eight 24FC65's on the same bus for up to 512K bits

contiguous EEPROM memory. The 24FC65 is available

in the standard 8-pin plastic DIP and 8-pin surface

mount SOIC package.

24FC65

PACKAGE TYPES

BLOCK DIAGRAM

A0

A1

A2

1

2

3

4

8

7

6

5

NC

SCL

SDA

A0

A1

A2

1

2

3

4

8

7

6

5

NC

SCL

SDA

PDIP

SOIC

A0..A2

I/O

CONTROL

LOGIC

I/O

SDA

SCL

Vcc

Vss

MEMORY

CONTROL

LOGIC

XDEC

HV GENERATOR

EEPROM

ARRAY

PAGE LATCHES

YDEC

CACHE

SENSE AMP

R/W CONTROL

Smart Serial is a trademark of Microchip Technology Inc.

This document was created with FrameMaker404