admin 发表于 2010-4-24 10:44:33

24LCS21A Data Sheet

http://www.microchip.com/stellent/images/mchpsiteimages/dwnfolder.gif24LCS21A Data Sheet

The Microchip Technology Inc. 24LCS21A 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 Bidirectional mode. Upon power-up, the device will be in the Transmit-Only mode, a valid high-to-low transition on the SCLpin 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 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 24LCS21A also enables the user to write-protect the entire memory array using its write-protect pin. The 24LCS21A is available in a standard 8-pin PDIP and SOIC package in industrial temperature range.

参数名称数值
Density1K bits (x8)
Max. Clock Freq.400 kHz
Page Size (bytes)8
Write ProtectWhole Array
Endurance1,000,000
Op. Volt Range (V)2.5 to 5.5
Temp Range (°C)-40°C to +85°C

   特性
Single Supply with Operation Down to 2.5V
Completely Implements DDC1™/DDC2™ Interface
for Monitor Identification, Including Recovery
to DDC1
Low-Power CMOS Technology:
    - 1 mA active current, typical
    - 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)
Hardware Write-Protect Pin
Page Write Buffer for up to Eight Bytes
1,000,000 Erase/Write Cycles Ensured
Data Retention > 200 years
ESD Protection > 4000V
8-pin PDIP and SOIC Package
Available for Extended Temperature Ranges:
- Industrial (I): -40°C to +70°C
Pb-Free and RoHS Compliant


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