TLV809 datasheet(7/20 Pages) TI1

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GND

RESET

TLV809

Oscillator

Reference

Voltage

of 1.137 V

Reset

Logic

Timer

TLV809

www.ti.com

SLVSA03D – JUNE 2010 – REVISED MARCH 2016

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8 Detailed Description

8.1 Overview

The TLV809 is a 3-pin voltage detector with fixed detection thresholds, an active-low push-pull RESET output,

and an internal timer to delay the RESET signal when VDD rises above the threshold voltage.

8.2 Functional Block Diagram

8.3 Feature Description

8.3.1 Supply Voltage Monitoring

The device actively monitors its supply voltage to ensure that the power supply is above a certain voltage

threshold.

The device offers various fixed threshold options that are approximately 10% below several standard supply

voltages (2.5 V, 3.0 V, 3.3 V, 5.0 V).

8.3.2 RESET Output

The device has a RESET output to indicate the status of the input power supply.

RESET is an active low signal, asserting when VDD is below the threshold voltage. When VDD rises above VIT,

there is a delay time (td) until RESET deasserts.

RESET is a push-pull output stage.

8.4 Device Functional Modes

When the input supply voltage is in its recommended operating range (2 V to 6 V), the device is in a normal

operational mode. In normal operational mode the device monitors VDD for undervoltage detection.

When the input supply is below its recommended operating range, the device is in shutdown mode and therefore

tries to assert RESET.

TLV809 Datasheet(PDF) 7 Page - Texas Instruments