24LCS22A Series

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

Catalog

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

Part	Memory Type	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Package / Case [y]	Package / Case [x]	Voltage - Supply [Min]	Voltage - Supply [Max]	Clock Frequency	Write Cycle Time - Word, Page	Supplier Device Package	Memory Format	Memory Size	Technology	Mounting Type	Memory Interface	Memory Organization [custom]	Memory Organization [custom]	Access Time
Microchip Technology 24LCS22AT-I/SN	Non-Volatile	85 °C	-40 °C	8-SOIC	3.9 mm	0.154 in	2.5 V	5.5 V	400 kHz	10 ms	8-SOIC	EEPROM	256 B	EEPROM	Surface Mount	I2C	8	256	900 ns
Microchip Technology 24LCS22A-I/SN	Non-Volatile	85 °C	-40 °C	8-SOIC	3.9 mm	0.154 in	2.5 V	5.5 V	400 kHz	10 ms	8-SOIC	EEPROM	256 B	EEPROM	Surface Mount	I2C	8	256	900 ns

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)

• * Hardware Write-Protect Pin

• * Page Write Buffer for up to Eight Bytes

• * 1,000,000 Erase Write Cycles

• * Data Retention >200 years

Description

The Microchip Technology Inc. 24LCS22A is a 256 x 8-bit dual-mode Electrically Erasable PROM (EEPROM). 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 24LCS22A is available in standard 8-pin PDIP and SOIC packages. The 24LCS22A features a flexible write-protect pin which is enabled by writing to address 7Fh (usually the checksum in VESA® applications.