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Manufacturer Part #


24LCS22 Series 2 Kb I2C 2 Wire (256 x 8) 2.5 V Serial EEPROM SMT - SOIC-8

ECAD Model:
Mfr. Name: Microchip
Standard Pkg:
Product Variant Information section
Date Code: 2134
Product Specification Section
Microchip 24LCS22A-I/SN - Technical Attributes
Attributes Table
Memory Density: 2kb
Memory Organization: 256 x 8
Supply Voltage-Nom: 2.5V to 5.5V
Clock Frequency-Max: 400kHz
Write Cycle Time-Max (tWC): 10ms
Package Style:  SOIC-8
Mounting Method: Surface Mount
Features & Applications

The 24LCS22A series of 256 x 8-bit dual-mode Electrically Erasable PROM (EEPROM) 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 2 K 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.


  • Single Supply with Operation Down to 2.5 V
  • 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 (2.5 V) and 400 kHz (5 V) 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
Pricing Section
Global Stock:
Germany (Online Only):
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Factory Stock:Factory Stock:
Factory Lead Time:
5 Weeks
Minimum Order:
Multiple Of:
Web Price
Product Variant Information section