DESCRIPTION
IS23SC4442 contains 256 x 8 bits of EEPROM main memory and a 32 x 1 bit protection PROM memory. The main memory can be randomly accessed byte by byte. During memory erase, all 8 bits of a byte are set to logical one. During memory write, individual bit(s) are set to logical zeros depend on the data value to be written. Normally, a data change may consists of an erase and a write operation. The write or erase operation takes at least 2.5 ms to complete.

FEATURES
• Standard CMOS process
• 256 x 8 bits EEPROM organization
• Byte-wise addressing
• Irreversible byte-wise write protection of lowest 32 address (Byte 0..31)
• 3-byte Programmable Security Code (PSC) for memory write/erase protection
• 2.7-5.5V power supply for read and write/erase
• Low power operation: 3 mA typical active current
• 2.5 ms programming time
• 2-wire serial interface
• End of processing indication
• ISO standard 7816 compatible
• High reliability:
    – 1,000,000 erase/write cycles guaranteed
    – 10 years data retention
• Wide operating temperature range
    –30°C to 75°C