_

+

RESET

(1)

RESET

MR

(2)

WDI

(3)

Auto-Reset

Oscillator

Transition

Detector

Watchdog

Timer Logic

RESET

Logic

V

REF

V

DD

52 kW

40 kW

TPS3820-33-Q1, TPS3820-50-Q1, TPS3823-25-Q1

TPS3823-30-Q1, TPS3823-33-Q1, TPS3823-50-Q1, TPS3824-30-Q1, TPS3824-33-Q1

TPS3824-50-Q1, TPS3825-33-Q1, TPS3825-50-Q1, TPS3828-33-Q1, TPS3828-50-Q1

www.ti.com

SGLS143C – DECEMBER 2002 – REVISED DECEMBER 2015

8 Detailed Description

8.1 Overview

The TPS382x-xx-Q1 family of supervisors provide circuit initialization and timing supervision. Optional

configurations include devices with active-high and active-low output signals (TPS3824/5-xx-Q1), devices with a

watchdog timer (TPS3820/3/4/8-xx-Q1), and devices with manual reset (MR) pins (TPS3820/3/5/8-xx-Q1).

The TPS382x-xx-Q1 family is designed to monitor supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The devices are

available in a 5-pin SOT-23 package and are characterized for operation over a temperature range of

−40°C to

125°C, and are qualified in accordance with AEC-Q100 stress test qualification for integrated circuits.

8.2 Functional Block Diagram

(1)

TPS3824/5-xx-Q1

(2)

TPS3820/3/5/8-xx-Q1

(3)

TPS3820/3/4/8-xx-Q1

8.3 Feature Description

8.3.1 Manual Reset (MR)

The MR input allows an external logic signal from processors, logic circuits, and/or discrete sensors to force a

the reset signals to become active.

8.3.2 Active High or Active Low Output

All TPS382x-xx-Q1 devices have an active-low logic output (RESET), while the TPS3824/5-xx-Q1 devices also

include an active-high logic output (RESET).

Copyright © 2002–2015, Texas Instruments Incorporated

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Product Folder Links: TPS3820-33-Q1 TPS3820-50-Q1 TPS3823-25-Q1 TPS3823-30-Q1 TPS3823-33-Q1 TPS3823-

50-Q1 TPS3824-30-Q1 TPS3824-33-Q1 TPS3824-50-Q1 TPS3825-33-Q1 TPS3825-50-Q1 TPS3828-33-Q1

TPS3828-50-Q1