24LC21-IP MICROCHIP [Microchip Technology], 24LC21-IP Datasheet

24LC21-IP

Manufacturer Part Number

24LC21-IP

Description

1K 2.5V Dual Mode I 2 C Serial EEPROM

Manufacturer

MICROCHIP [Microchip Technology]

Datasheet

1.24LC21-IP.pdf (12 pages)

Current page: 1 of 12
Download datasheet (85Kb)

FEATURES

• Single supply with operation down to 2.5V

• Completely implements DDC1 /DDC2

• Low power CMOS technology

• 2-wire serial interface bus, I

• Self-timed write cycle (including auto-erase)

• Page-write buffer for up to 8 bytes

• 100 kHz (2.5V) and 400 kHz (5V) compatibility

• Factory programming (QTP) available

• 1,000,000 erase/write cycles guaranteed

• Data retention > 200 years

• 8-pin PDIP and SOIC package

• Available for extended temperature ranges

DESCRIPTION

The Microchip Technology Inc. 24LC21 is a 128 x 8 bit

Electrically Erasable PROM. This device is designed for

use in applications requiring storage and serial trans-

mission of conﬁguration and control information. Two

modes of operation have been implemented: Transmit

Only Mode and Bi-Directional Mode. Upon power-up,

the device will be in the Transmit Only Mode, sending a

serial bit stream of the entire memory array contents,

clocked by the VCLK pin. A valid high to low transition

on the SCL pin will cause the device to enter the

Bi-Directional Mode, with byte selectable read/write

capability of the memory array. The 24LC21 is available

in a standard 8-pin PDIP and SOIC package in both

commercial and industrial temperature ranges.

DDC is a trademark of the Video Electronics StandarDs Association.

C is a trademark of Philips Corporation.

1996 Microchip Technology Inc.

face for monitor identiﬁcation

- 1 mA active current typical

- 10 A standby current typical at 5.5V

- Commercial (C):

- Industrial (I):

1K 2.5V Dual Mode I

-40˚C to +85˚C

0˚C to +70˚C

This document was created with FrameMaker 4 0 4

compatible

inter-

C Serial EEPROM

PACKAGE TYPES

BLOCK DIAGRAM

SDA

CONTROL

LOGIC

I/O

PDIP

SOIC

SCL

VCLK

CONTROL

MEMORY

LOGIC

24LC21

XDEC

DS21095F-page 1

HV GENERATOR

PAGE LATCHES

R/W CONTROL

SENSE AMP

EEPROM

VCLK

SCL

SDA

ARRAY

YDEC

VCLK

SCL

SDA

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