24LCS21

Features:

• Completely implements DDC1™/DDC2™ interface for monitor identification
• Hardware write-protect pin
• Single supply with operation down to 2.5V
• Low power CMOS technology
  - 1 mA active current typical
  - 10 A standby current typical at 5.5V
• 2-wire serial interface bus, I²C™ compatible (SCL)
• Self-timed write cycle (including auto-erase)
• Page-write buffer for up to 8 bytes
• 100 kHz (2.5V) and 400 kHz (5V) compatibility (SCL)
• 10,000,000 erase/write cycles guaranteed
• Data retention > 200 years
• 8-pin PDIP and SOIC package
• Available for extended temperature ranges
  - Commercial (C): 0°C to +70°C
  - Industrial (I) -40°C to +85°C


Pinout




Specifications

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 temp. with power applied .................................... -65°C to +125°C
Soldering temperature of leads (10 seconds) .................... +300°C
ESD protection on all pins .................................................. 4 kV

*Notice: Stresses above those listed under "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. 24LCS21 is a 128 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 implemented: Transmit Only Mode and bi-directional Mode. Upon power-up, the device will be in the Transmit Only Mode, sending a serial bit stream of the entire memory array contents, clocked by the VCLK pin. A valid high to low transition on the SCL pin will cause 24LCS21 to enter the bi-directional Mode, with byte selectable read/write capability of the memory array in standard I²C protocol.

The 24LCS21 also enables the user to write-protect the entire memory contents using its write-protect pin. The 24LCS21 is available in a standard 8-pin PDIP and SOIC package in both commercial and industrial temperature ranges.