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X40421 - Dual Voltage Monitor

Download the X40421 datasheet PDF. This datasheet also covers the X40420 variant, as both devices belong to the same dual voltage monitor family and are provided as variant models within a single manufacturer datasheet.

Description

The X40420/21 combines power-on reset control, watchdog timer, supply voltage supervision, and secondary supervision, manual reset, and Block Lock™ protect serial EEPROM in one package.

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

Features

  • Dual voltage detection and reset assertion.
  • Three standard reset threshold settings (4.6V/2.9V, 4.6V/2.6V, 2.9V/1.6V).
  • VTRIP2 Programmable down to 0.9V.
  • Adjust low voltage reset threshold voltages using special programming sequence.
  • Reset signal valid to VCC = 1V.
  • Monitor two voltages or detect power fail.
  • Battery Switch Backup.
  • VOUT: 5mA to 50mA from VCC; or 250µA from VBATT.
  • Fault detection register.
  • Selectab.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (X40420_IntersilCorporation.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
X40421 Dual Voltage Monitor Xicor
X40420 Dual Voltage Monitor Xicor
X40430 Triple Voltage Monitor Xicor
X40431 Triple Voltage Monitor Xicor
X40010 Dual Voltage Monitor with Integrated CPU Supervisor Xicor

Other Datasheets by Intersil (Renesas)

Part Number Description
X40420 Dual Voltage Monitor
X40410 Dual Voltage Monitor
X40411 Dual Voltage Monitor
X40414 Dual Voltage Monitor
X40415 Dual Voltage Monitor

Full PDF Text Transcription

Click to expand full text
® X40420, X40421 4kbit EEPROM Data Sheet March 28, 2005 FN8117.0 PRELIMINARY Dual Voltage Monitor with Integrated CPU Supervisor and System Battery Switch FEATURES • Dual voltage detection and reset assertion —Three standard reset threshold settings (4.6V/2.9V, 4.6V/2.6V, 2.9V/1.6V) —VTRIP2 Programmable down to 0.9V —Adjust low voltage reset threshold voltages using special programming sequence —Reset signal valid to VCC = 1V —Monitor two voltages or detect power fail • Battery Switch Backup • VOUT: 5mA to 50mA from VCC; or 250µA from VBATT • Fault detection register • Selectable power-on reset timeout (0.05s, 0.2s, 0.4s, 0.8s) • Selectable watchdog timer interval (25ms, 200ms, 1.
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