24LC22A Series

2Kb I2C Serial EEPROM for DDC1™/DDC2™ Monitor Identification

Catalog

2Kb I2C Serial EEPROM for DDC1™/DDC2™ Monitor Identification

Part	Voltage - Supply [Min]	Voltage - Supply [Max]	Memory Interface	Write Cycle Time - Word, Page	Mounting Type	Technology	Memory Size	Memory Type	Supplier Device Package	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Package / Case	Package / Case	Clock Frequency	Access Time	Memory Format	Memory Organization [custom]	Memory Organization [custom]	Package / Case [y]	Package / Case [x]
Microchip Technology 24LC22A-I/P	2.5 V	5.5 V	I2C	10 ms	Through Hole	EEPROM	256 B	Non-Volatile	8-PDIP	85 °C	-40 °C	0.3 in	8-DIP	7.62 mm	400 kHz	900 ns	EEPROM	8	256
Microchip Technology 24LC22A-I/SN	2.5 V	5.5 V	I2C	10 ms	Surface Mount	EEPROM	256 B	Non-Volatile	8-SOIC	85 °C	-40 °C		8-SOIC		400 kHz	900 ns	EEPROM	8	256	3.9 mm	0.154 in
Microchip Technology 24LC22AT-I/SN	2.5 V	5.5 V	I2C	10 ms	Surface Mount	EEPROM	256 B	Non-Volatile	8-SOIC	85 °C	-40 °C		8-SOIC		400 kHz	900 ns	EEPROM	8	256	3.9 mm	0.154 in

Catalog

2Kb I2C Serial EEPROM for DDC1™/DDC2™ Monitor Identification

Key Features

• * Single Supply with Operation Down to 2.5V

• * Supports Enhanced EDID™ (E-EDID™) 1.3

• * Completely Implements DDC1™/DDC2™

• Interface for Monitor Identification, Including

• Recovery to DDC1

• * 2 Kbit Serial EEPROM Low-Power CMOS

• Technology:

• * 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

• * 1,000,000 Erase/Write Cycles

• * Data Retention >200 years

Description

The Microchip Technology Inc. 24LC22A is a 256 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 implemented: Transmit-Only mode (1 Kbit) and Bidirectional mode (2 Kbit). 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™Compatible 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 entire 2K 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 24LC22A is available in standard 8-pin PDIP and SOIC packages.