25C640

M 25AA640/25LC640/25C640 64K SPI™ Bus Serial EEPROM PACKAGE TYPES Temp Ranges C,I C,I C,I,E CS SO WP VSS PDIP/SOIC 1 25xx640 2 3 4 8 7 6 5 VCC HOLD SCK SI Max Clock Frequency 1 MHz 2 MHz 3 MHz DEVICE SELECTION TABLE Part Number 25AA640 25LC640 25C640 VCC Range 1.8-5.5V 2.5-5.5V 4.5-5.5V FEATURES Low power CMOS technology - Write current: 3 mA typical - Read current: 500 µA typical - Standby current: 500 nA typical 8192 x 8 bit organization 32 byte page Write cycle time: 5ms max. Self-timed ERASE and WRITE cycles Block write protection - Protect none, 1/4, 1/2, or all of array Built-in write protection - Power on/off data protection circuitry - Write enable latch - Write protect pin Sequential read High reliability - Endurance: 1M cycles (guaranteed) - Data retention: > 200 years - ESD protection: > 4000 V 8-pin PDIP, SOIC, and TSSOP packages Temperature ranges supported: - Commercial: (C) 0°C to +70°C - Industrial: (I) -40°C to +85°C - Automotive: (E) (25C640) -40°C to +125°C TSSOP HOLD VCC CS SO 1 2 3 4 8 7 6 5 SCK SI VSS WP 25xx640 BLOCK DIAGRAM Status Register HV Generator EEPROM I/O Control Logic Memory Control Logic X Dec Page Latches Array DESCRIPTION The Microchip Technology Inc. 25AA640/25LC640/ 25C640 (25xx640*) is a 64K bit serial Electrically Erasable PROM. The memory is accessed via a simple Serial Peripheral Interface (SPI) compatible serial bus. The bus signals required are a clock input (SCK) plus separate data in (SI) and data out (...