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TPS3818 Datasheet Accurate Programmable-Delay Supervisory Circuit

Manufacturer: Texas Instruments

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General Description

The TPS3818xxx family of microprocessor supervisory circuits monitor system voltages from 0.4V to 5.0V, asserting an open-drain RESET signal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low.

The RESET output remains low for the user-adjustable delay time after the SENSE voltage and manual reset (MR) return above the respective thresholds.

The TPS3818 uses a precision reference to achieve 0.5% threshold accuracy for VIT ≤ 3.3V.

Overview

TPS3818 www.ti.com .........................................................................................................................................................

Key Features

  • 1.
  • 23 Power-On Reset Generator with Adjustable Delay Time: 1.25ms to 10s.
  • Very Low Quiescent Current: 2.4µA typ.
  • High Threshold Accuracy: 0.5% typ.
  • Fixed Threshold Voltages for Standard Voltage Rails from 0.9V to 5V and Adjustable Voltage Down to 0.4V Are Available.
  • Manual Reset (MR) Input.
  • Open-Drain RESET Output.
  • Temperature Range:.
  • 40°C to +125°C.
  • Small SOT23 and 2mm × 2mm QFN Packages.

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