Integrated Circuits (ICs)

24LC21A/SN

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Microchip Technology

EEPROM, DUAL MODE, 1 KBIT, 128 X 8BIT, I2C, 400 KHZ, SOIC, 8 PINS

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Integrated Circuits (ICs)

24LC21A/SN

Active

Microchip Technology

EEPROM, DUAL MODE, 1 KBIT, 128 X 8BIT, I2C, 400 KHZ, SOIC, 8 PINS

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Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	24LC21A/SN

Access Time	900 ns
Clock Frequency	400 kHz
Memory Format	EEPROM
Memory Interface	I2C
Memory Organization	128 x 8
Memory Size	128 B
Memory Type	Non-Volatile
Mounting Type	Surface Mount
Operating Temperature [Max]	70 °C
Operating Temperature [Min]	0 °C
Package / Case	8-SOIC
Package / Case [x]	0.154 in
Package / Case [y]	3.9 mm
Supplier Device Package	8-SOIC
Technology	EEPROM
Voltage - Supply [Max]	5.5 V
Voltage - Supply [Min]	2.5 V
Write Cycle Time - Word, Page	10 ms

24LC21A Series

1Kb I2C Serial EEPROM for DDC1™/DDC2™ Monitor Identification

Part	Memory Interface	Voltage - Supply [Min]	Voltage - Supply [Max]	Memory Type	Technology	Clock Frequency	Access Time	Memory Format	Mounting Type	Write Cycle Time - Word, Page	Supplier Device Package	Package / Case	Package / Case [y]	Package / Case [x]	Memory Size	Operating Temperature [Max]	Operating Temperature [Min]	Memory Organization	Package / Case	Package / Case
Microchip Technology 24LC21AT-I/SN	I2C	2.5 V	5.5 V	Non-Volatile	EEPROM	400 kHz	900 ns	EEPROM	Surface Mount	10 ms	8-SOIC	8-SOIC	3.9 mm	0.154 in	128 B	85 °C	-40 °C	128 x 8
Microchip Technology 24LC21/SN	I2C	2.5 V	5.5 V	Non-Volatile	EEPROM	400 kHz	900 ns	EEPROM	Surface Mount	10 ms	8-SOIC	8-SOIC	3.9 mm	0.154 in	128 B	70 °C	0 °C	128 x 8
Microchip Technology 24LC21A/P	I2C	2.5 V	5.5 V	Non-Volatile	EEPROM	400 kHz	900 ns	EEPROM	Through Hole	10 ms	8-PDIP	8-DIP			128 B	70 °C	0 °C	128 x 8	0.3 in	7.62 mm
Microchip Technology 24LC21T/SN	I2C	2.5 V	5.5 V	Non-Volatile	EEPROM	400 kHz	900 ns	EEPROM	Surface Mount	10 ms	8-SOIC	8-SOIC	3.9 mm	0.154 in	128 B	70 °C	0 °C	128 x 8
Microchip Technology 24LC21-I/SN	I2C	2.5 V	5.5 V	Non-Volatile	EEPROM	400 kHz	900 ns	EEPROM	Surface Mount	10 ms	8-SOIC	8-SOIC	3.9 mm	0.154 in	128 B	85 °C	-40 °C	128 x 8
Microchip Technology 24LC21T-I/SN	I2C	2.5 V	5.5 V	Non-Volatile	EEPROM	400 kHz	900 ns	EEPROM	Surface Mount	10 ms	8-SOIC	8-SOIC	3.9 mm	0.154 in	128 B	85 °C	-40 °C	128 x 8
Microchip Technology 24LC21AT/SN	I2C	2.5 V	5.5 V	Non-Volatile	EEPROM	400 kHz	900 ns	EEPROM	Surface Mount	10 ms	8-SOIC	8-SOIC	3.9 mm	0.154 in	128 B	70 °C	0 °C	128 x 8
Microchip Technology 24LC21A/SN	I2C	2.5 V	5.5 V	Non-Volatile	EEPROM	400 kHz	900 ns	EEPROM	Surface Mount	10 ms	8-SOIC	8-SOIC	3.9 mm	0.154 in	128 B	70 °C	0 °C	128 x 8

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 0.52
		25	$ 0.50
		100	$ 0.48
Newark	Each	100	$ 0.49

Description

General part information

24LC21A Series

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

Documents

Technical documentation and resources