24LC22A
2K VESA® E-EDID™ Serial EEPROM
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: - 1 mA typical active current - 10 uA standby current typical at 5. 5V • 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 • ESD Protection >4000V • 8-pin PDIP and SOIC Packages • Available Temperature Ranges: - Industrial (I) -40°C to +85°C • Pb-Free and RoHS Compliant
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 packages.
Package Types
PDIP/SOIC
*NC 1 *NC 2 *NC 3 VSS 4
24LC22A
8 VCC 7 VCLK 6 SCL 5 SDA
* Pins labeled ‘NC’ has no internal connections
Block Diagram
I/O Control Logic
Memory Control Logic
XDEC
SDA SCL
VCLK
VCC V...
24LC22A PDF File
