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Reset & watchdog ICs

TPS3809-Q1

ACTIVE

Automotive, 3-pin voltage supervisor (reset IC) with active-low, push-pull reset

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Data sheet

TPS3809-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 2.64, 2.93, 4.55 Features Ease-of-use Reset threshold accuracy (%) 2.2 Iq (typ) (mA) 0.009 Output driver type/reset output Active-low, Push-Pull Time delay (ms) 200 Watchdog timer WDI (s) None Supply voltage (min) (V) 2 Supply voltage (max) (V) 6 Operating temperature range (°C) -40 to 125
Rating Automotive Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 2.64, 2.93, 4.55 Features Ease-of-use Reset threshold accuracy (%) 2.2 Iq (typ) (mA) 0.009 Output driver type/reset output Active-low, Push-Pull Time delay (ms) 200 Watchdog timer WDI (s) None Supply voltage (min) (V) 2 Supply voltage (max) (V) 6 Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 3 8.12 mm² 2.9 x 2.8
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C5
  • 3-Pin SOT-23 Package
  • Supply Current of 9 µA (Typical)
  • Precision-Supply Voltage Monitor 2.5 V, 3 V, 3.3 V, 5 V
  • Power-On Reset Generator With Fixed Delay Time of 200 ms
  • Pin-For-Pin Compatible With MAX 809
  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C5
  • 3-Pin SOT-23 Package
  • Supply Current of 9 µA (Typical)
  • Precision-Supply Voltage Monitor 2.5 V, 3 V, 3.3 V, 5 V
  • Power-On Reset Generator With Fixed Delay Time of 200 ms
  • Pin-For-Pin Compatible With MAX 809

The TPS3809 family of supervisory circuits provides circuit initialization and timing supervision, primarily for DSPs and processor-based systems. The newer TLV809E device is an alternative with the same pins, functions and electrical parameters.

During power-on, RESET is asserted when the supply voltage VDD becomes higher than 1.1 V. Thereafter, the supervisory circuit monitors VDD and keeps RESET active as long as VDD remains below the threshold voltage VIT. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time, td(typ) = 200 ms, starts after VDD has risen above the threshold voltage VIT. When the supply voltage drops below the threshold voltage VIT, the output becomes active (low) again. No external components are required. All the devices of this family have a fixed sense-threshold voltage VIT set by an internal voltage divider.

The product spectrum is designed for supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The circuits are available in a 3-pin SOT-23. The TPS3809xxx-Q1 devices 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.

The TPS3809 family of supervisory circuits provides circuit initialization and timing supervision, primarily for DSPs and processor-based systems. The newer TLV809E device is an alternative with the same pins, functions and electrical parameters.

During power-on, RESET is asserted when the supply voltage VDD becomes higher than 1.1 V. Thereafter, the supervisory circuit monitors VDD and keeps RESET active as long as VDD remains below the threshold voltage VIT. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset. The delay time, td(typ) = 200 ms, starts after VDD has risen above the threshold voltage VIT. When the supply voltage drops below the threshold voltage VIT, the output becomes active (low) again. No external components are required. All the devices of this family have a fixed sense-threshold voltage VIT set by an internal voltage divider.

The product spectrum is designed for supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The circuits are available in a 3-pin SOT-23. The TPS3809xxx-Q1 devices 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.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet TPS3809xxx-Q1 3-Pin Supply Voltage Supervisors datasheet (Rev. C) PDF | HTML 23 Dec 2020
Application note Voltage Supervisors (Reset ICs): Frequently Asked Questions (FAQs) (Rev. A) 17 Mar 2020
Selection guide Voltage Supervisors (Reset ICs) Quick Reference Guide (Rev. H) 28 Feb 2020
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 Jun 2019
Design guide TIDA-00141 Overview 07 May 2014
Test report TIDA-00141 Test Results 09 Apr 2014

Design & development

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