Datasheet > 24LC21A_03

24LC21A_03

更新时间： 2024-11-18 04:25:27

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
18页	241K
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_03 数据手册

24LC21A

1K 2.5V Dual Mode I²C^™Serial EEPROM

Features

Package Types

• Single supply with operation down to 2.5V

PDIP

Vcc

• Completely implements DDC1™/DDC2™

interface for monitor identification, including

recovery to DDC1

VCLK

• Pin and function compatible with 24LC21

• Low-power CMOS technology

SCL

SDA

- 1 mA typical active current

VSS

- 10 µA standby current typical at 5.5V

• 2-wire serial interface bus, I²C™ compatible

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

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

• Page write buffer for up to eight bytes

SOIC

Vcc

VCLK

•

1,000,000 erase/write cycles ensured

• Data retention > 200 years

SCL

SDA

• ESD Protection > 4000V

• 8-pin PDIP and SOIC package

• Available for extended temperature ranges

Vss

- Commercial (C):

- Industrial (I):

0°C to +70°C

-40°C to +85°C

Block Diagram

Description

HV Generator

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 informa-

tion. Two modes of operation have been implemented:

Transmit-only mode and Bidirectional 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 byte on

the I²C bus. If it detects a valid control byte from the

master, it will switch into Bidirectional 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.

I/O

Control

Logic

Memory

Control

Logic

EEPROM

Array

XDEC

Page Latches

SCL

SDA

YDEC

VCLK

Sense AMP

R/W Control

VCC

VSS

Pin Function Table

Name

Function

VSS

SDA

SCL

VCLK

VCC

Ground

Serial Address/Data I/O

Serial Clock (Bidirectional mode)

Serial Clock (Transmit-only mode)

+2.5V to 5.5V Power Supply

No Connection

DDC is a trademark of the Video Electronics Standards

Association.

I C is a trademark of Philips Corporation.

 2003 Microchip Technology Inc.

DS21160F-page 1

12 3 4 5 6 7...18

中文翻译

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与24LC21A_03相关器件

型号	品牌	获取价格	描述	数据表
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
24LC21A1T-/P	MICROCHIP	获取价格	1K 2.5V Dual Mode I 2 C Serial EEPROM
24LC21A1T-/SN	MICROCHIP	获取价格	1K 2.5V Dual Mode I 2 C Serial EEPROM
24LC21A1T-I/P	MICROCHIP	获取价格	1K 2.5V Dual Mode I 2 C Serial EEPROM
24LC21A1T-I/SN	MICROCHIP	获取价格	1K 2.5V Dual Mode I 2 C Serial EEPROM
24LC21A-I	MICROCHIP	获取价格	1K 2.5V Dual Mode I2C Serial EEPROM

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