Datasheet > 24LC21/SN

24LC21/SN

更新时间： 2024-11-17 23:19:15

品牌	Logo	应用领域
其他 - ETC		内存集成电路光电二极管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时钟
页数	文件大小	规格书
16页	237K
描述
I2C Serial EEPROM

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中文翻译

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数据手册

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24LC21/SN 数据手册

24LC21

1K 2.5V Dual Mode I²C^™Serial EEPROM

FEATURES

PACKAGE TYPES

PDIP

• Single supply with operation down to 2.5V

• Completely implements DDC1/DDC2 inter-

VCC

face for monitor identification

• Low power CMOS technology

VCLK

- 1 mA active current typical

- 10 µA standby current typical at 5.5V

• 2-wire serial interface bus, I²C compatible

• 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 ensured

• Data retention > 200 years

SCL

SDA

VSS

SOIC

VCC

• 8-pin PDIP and SOIC package

VCLK

• Available for extended temperature ranges

- Commercial (C):

- Industrial (I):

0°C to +70°C

-40°C to +85°C

SCL

SDA

VSS

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

transmission 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.

BLOCK DIAGRAM

VCLK

HV GENERATOR

I/O

CONTROL

LOGIC

MEMORY

CONTROL

LOGIC

EEPROM

ARRAY

XDEC

PAGE LATCHES

SDA

SCL

YDEC

VCC

VSS

SENSE AMP

R/W CONTROL

DDC is a trademark of the Video Electronics Standards Association.

I²C is a trademark of Philips Corporation.

 2001 Microchip Technology Inc.

DS21095H-page 1

12 3 4 5 6 7...16

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