24LCS22A

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 active current, typical
- 10A 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)
• Hardware write-protect pin
• Page write buffer for up to eight bytes
• 1,000,000 erase write cycles
• Data retention > 200 years
• ESD protection > 4000V
• 8-pin DIP and SOIC packages
• Available temperature ranges:
- Industrial (I) -40°C to +85°C

Pinout






Specifications

Parameter Name	Value
Density	2K bits (x8)
Max. Clock Freq.	400 kHz
Page Size (bytes)	8
Write Protect	Whole Array
Endurance	1,000,000
Op. Volt Range (V)	2.5 to 5.5
Temp Range (°C)	-40°C to +85°C

Absolute Maximum Ratings(†)
V_CC........................................................................................................7.0V
All inputs and outputs w.r.t. V_SS ................................... -0.6V to V_CC +1.0V
Storage temperature ........................................................65°C to +150°C
Ambient temperature with power applied........................-40°C to +125°C
ESD protection on all pins .................................................................. 4 kV

† Notice: Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the
device. This is a stress rating only and functional operation of the device at those or any other conditions above those
indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for
extended periods may affect device reliability.

Description

The Microchip Technology Inc. 24LCS22A is a 256 x 8-bitdual-mode Electrically Erasable PROM (EEPROM). 24LCS22A is designed for use in applications requiringstorage and serial transmission of configuration andcontrol information. Two modes of operation have beenimplemented: Transmit-Only mode (1 Kbit) andBidirectional mode (2 Kbit). Upon power-up, the devicewill be in the Transmit-Only mode, sending a serial bitstream of the memory array from 00h to 7Fh, clocked bythe VCLK pin. A valid high-to-low transition on the SCL pinwill cause the device to enter the Transition mode, andlook for a valid control byte on the I²C™Compatible bus. If 24LCS22A detects avalid control byte from the master, it will switch intoBidirectional mode, with byte selectable read/writecapability of the entire 2K memory array using SCL. If nocontrol byte is received, the device will revert to the Transmit-Only mode after it receives 128 consecutive VCLKpulses while the SCL pin is idle. The 24LCS22A is availablein standard 8-pin PDIP and SOIC packages. The 24LCS22A features a flexible write-protect pin which isenabled by writing to address 7Fh (usually the checksumin VESA? applications.