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24LC22A-I Datasheet(PDF) 1 Page - Microchip Technology |
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24LC22A-I Datasheet(HTML) 1 Page - Microchip Technology |
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1 / 24 page  © 2007 Microchip Technology Inc. DS21683B-page 1 24LC22A 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: • Pb-Free and RoHS Compliant 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 imple- mented: 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 Block Diagram - Industrial (I) -40°C to +85°C PDIP/SOIC *NC *NC *NC VSS 1 2 3 4 8 7 6 5 VCC VCLK SCL SDA * Pins labeled ‘NC’ has no internal connections HV Generator EEPROM Array Page Latches YDEC XDEC Sense AMP R/W Control Memory Control Logic I/O Control Logic SDA SCL VCC VSS VCLK 2K VESA® E-EDID™ Serial EEPROM |
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