Datasheet > 存储 > EEPROM> 24LC21A

24LC21A

更新时间： 2024-11-17 22:38:27

品牌	Logo	应用领域
美国微芯 - MICROCHIP		可编程只读存储器电动程控只读存储器电可擦编程只读存储器
页数	文件大小	规格书
16页	110K
描述
1K 2.5V Dual Mode I 2 C Serial EEPROM

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中文翻译

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24LC21A 数据手册

24LC21A

1K 2.5V Dual Mode I C Serial EEPROM

FEATURES

PACKAGE TYPES

PDIP

• Single supply with operation down to 2.5V

• Completely implements DDC1 /DDC2

interface for monitor identiﬁcation, including recov-

ery to DDC1

VCC

VCLK

• Pin and function compatible with 24LC21

• Low power CMOS technology

- 1 mA typical active current

SCL

SDA

VSS

- 10 µA standby current typical at 5.5V

• 2-wire serial interface bus, I C compatible

SOIC

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

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

• Page-write buffer for up to eight bytes

•

10,000,000 erase/write cycles guaranteed

VCC

• Data retention > 200 years

• ESD Protection > 4000V

• 8-pin PDIP and SOIC package

• Available for extended temperature ranges

VCLK

SCL

SDA

- Commercial (C):

- Industrial (I):

0°C to +70°C

-40°C to +85°C

VSS

DESCRIPTION

The Microchip Technology Inc. 24LC21A is a 128 x 8-

bit dual-mode Electrically Erasable PROM. This device

is designed for use in applications requiring storage

and serial transmission of conﬁguration and control

information. Two modes of operation have been imple-

mented: 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 memory array

from 00h to 7Fh, clocked by the VCLK pin. A valid high

to low transition on the SCL pin will cause the device to

enter the transition mode, and look for a valid control

BLOCK DIAGRAM

HV GENERATOR

I/O

CONTROL

LOGIC

MEMORY

CONTROL

LOGIC

EEPROM

ARRAY

XDEC

PAGE LATCHES

byte on the I C bus. If it detects a valid control byte from

SDA

SCL

the master, it will switch into Bi-directional Mode, with

byte selectable read/write capability of the memory

array using SCL. If no control byte is received, the

device will revert to the Transmit-Only Mode after it

receives 128 consecutive VCLK pulses while the SCL

pin is idle. The 24LC21A is available in a standard 8-pin

PDIP and SOIC package in both commercial and

industrial temperature ranges.

YDEC

VCLK

SENSE AMP

R/W CONTROL

VCC

VSS

DDC is a trademark of the Video Electronics Standards Association.

I²C is a trademark of Philips Corporation.

1996 Microchip Technology Inc.

Preliminary

DS21160B-page 1

This document was created with FrameMaker 4 0 4

12 3 4 5 6 7...16

中文翻译

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与24LC21A相关器件

型号	品牌	获取价格	描述	数据表
24LC21A/P	ETC	获取价格	I2C Serial EEPROM
24LC21A/PB27	MICROCHIP	获取价格	128 X 8 I2C/2-WIRE SERIAL EEPROM, PDIP8, 0.300 INCH, PLASTIC, DIP-8
24LC21A/PROC	MICROCHIP	获取价格	128 X 8 I2C/2-WIRE SERIAL EEPROM, PDIP8, 0.300 INCH, PLASTIC, DIP-8
24LC21A/SN	ETC	获取价格	I2C Serial EEPROM
24LC21A_03	MICROCHIP	获取价格	1K 2.5V Dual Mode I 2 C Serial EEPROM
24LC21A_08	MICROCHIP	获取价格	1K 2.5V Dual Mode I2C™ Serial EEPROM
24LC21A1-/P	MICROCHIP	获取价格	1K 2.5V Dual Mode I 2 C Serial EEPROM
24LC21A1-/SN	MICROCHIP	获取价格	1K 2.5V Dual Mode I 2 C Serial EEPROM
24LC21A1-I/P	MICROCHIP	获取价格	1K 2.5V Dual Mode I 2 C Serial EEPROM
24LC21A1-I/SN	MICROCHIP	获取价格	1K 2.5V Dual Mode I 2 C Serial EEPROM

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