24LC22A| Datasheet

Datasheet preview, take a look at Datasheets before downloading (Data Sheet is available on manufacturer site)

24LC22A
2K VESA E-EDIDTM Serial EEPROM
Features:
Single Supply with Operation Down to 2.5V Supports Enhanced EDIDTM (E-EDIDTM) 1.3 Completely Implements DDC1TM/DDC2TM Interface for Monitor Identification, Including Recovery to DDC1 2 Kbit Serial EEPROM Low-Power CMOS Technology: - 1 mA typical active current - 10 uA standby current typical at 5.5V 2-Wire Serial Interface Bus, I2CTM 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 ESD Protection >4000V 8-pin PDIP and SOIC Packages Available Temperature Ranges: - Industrial (I) -40 C to +85 C Pb-Free and RoHS Compliant

Package Types
PDIP/SOIC *NC *NC *NC VSS 1 24LC22A 2 3 4 8 7 6 5 VCC VCLK SCL SDA

* Pins labeled `NC' has no internal connections

Block Diagram
HV Generator

I/O Control Logic

Memory Control Logic

XDEC

EEPROM Array Page Latches

Description:
The Microchip Technology Inc. 24LC22A is a 256 x 8bit 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 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 packag
es.
SDA SCL VCLK VCC VSS

YDEC

Sense AMP R/W Control

2007 Microchip Technology Inc.

DS21683B-page 1