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X4283 - CPU Supervisor

Description

The X4283, X4285 combines four popular functions, Power-on Reset Control, Watchdog Timer, Supply Voltage Supervision, and Block Lock protect serial EEPROM memory in one package.

This combination lowers system cost, reduces board space requirements, and increases reliability.

Features

  • Selectable watchdog timer.
  • Low VCC detection and reset assertion.
  • Four standard reset threshold voltages.
  • Adjust low VCC reset threshold voltage using special programming sequence.
  • Reset signal valid to VCC = 1V.
  • Low power CMOS.

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Full PDF Text Transcription

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® X4283, X4285 128K, 16K x 8 Bit Data Sheet May 23, 2006 FN8121.1 CPU Supervisor with 128K EEPROM FEATURES • Selectable watchdog timer • Low VCC detection and reset assertion —Four standard reset threshold voltages —Adjust low VCC reset threshold voltage using special programming sequence —Reset signal valid to VCC = 1V • Low power CMOS —<20µA max standby current, watchdog on —<1µA standby current, watchdog OFF —3mA active current • 128Kbits of EEPROM —64 byte page write mode —Self-timed write cycle —5ms write cycle time (typical) • Built-in inadvertent write protection —Power-up/power-down protection circuitry —Protect 0, 1/4, 1/2, all or 64, 128, 256 or 512 bytes of EEPROM array with programmable Block Lock™ protection • 400kHz 2-wire interface www.DataSheet4U.com • 2.7V to 5.
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