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ISL735AEH Datasheet 5.0v/3.3v U-processor Supervisory Circuits

Manufacturer: Intersil (now Renesas)

Overview: Datasheet ISL705xRH, ISL705xEH, ISL706xRH, ISL706xEH, ISL735xEH, ISL736xEH Radiation Hardened, 5.0V/3.3V µ-Processor Supervisory Circuits The devices in this family (ISL705AEH, ISL705BEH, ISL705CEH, ISL705ARH, ISL705BRH, ISL705CRH, ISL706AEH, ISL706BEH, ISL706CEH, ISL706ARH, ISL706BRH, ISL706CRH, ISL735AEH, ISL735BEH, ISL735CEH, ISL736AEH, ISL736BEH, ISL736CEH) are radiation hardened 5.0V/3.3V supervisory circuits that reduce the complexity required to monitor supply voltages in microprocessor systems. These devices significantly improve accuracy and reliability relative to discrete solutions. Each IC provides four key functions. ▪ A reset output during power-up, power-down, and brownout conditions. ▪ An independent watchdog output that goes low if the watchdog input has not been toggled within 1.6s. ▪ A precision threshold detector for monitoring a power supply other than VDD. ▪ An active-low, manual-reset input. Applications ▪ Supervisor for µ-processors, µ-controllers, FPGAs, and DSPs ▪ Critical power supply monitoring ▪ Reliable replacement of discrete solutions 5V Power Supply 165k  49.9k 1 MR 2 VDD 3 GND 4 PFI WDO 8 RST 7 WDI 6 PFO 5 VCC NMI RST µP I/O ISL7X5AxH 5V Supervisor Application with Overvoltage Protection Figure 1. Typical Application FN7662 Rev.6.

This datasheet includes multiple variants, all published together in a single manufacturer document.

Key Features

  • Electrically screened to SMD 5962-11213.
  • QML qualified per MIL-PRF-38535 requirements.
  • Precision supply voltage monitor.
  • 4.65V threshold in the ISL7x5AxH/BxH/CxH.
  • 3.08V threshold in the ISL7x6AxH/BxH/CxH.
  • 200ms (typ) reset pulse width.
  • Active high, active low, and open-drain options.
  • Independent watchdog timer with 1.6s (typ) timeout.
  • Precision threshold detector.
  • 1.25V threshold in the ISL7x5AxH/BxH/CxH.
  • 0.6V threshold.

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