TPS3125

ACTIVE

Push-pull, supply voltage supervisor with manual reset

Product details

Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 1.2, 1.5, 1.8, 3 Features Complimentary output, Manual reset capable Reset threshold accuracy (%) 3.7 Iq (typ) (mA) 0.014 Output driver type/reset output Active-high, Active-low, Push-Pull Time delay (ms) 180 Supply voltage (min) (V) 0.75 Supply voltage (max) (V) 3.3 Rating Catalog Operating temperature range (°C) -40 to 85
Number of supplies monitored 1 Threshold voltage 1 (typ) (V) 1.2, 1.5, 1.8, 3 Features Complimentary output, Manual reset capable Reset threshold accuracy (%) 3.7 Iq (typ) (mA) 0.014 Output driver type/reset output Active-high, Active-low, Push-Pull Time delay (ms) 180 Supply voltage (min) (V) 0.75 Supply voltage (max) (V) 3.3 Rating Catalog Operating temperature range (°C) -40 to 85
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • Minimum supply voltage of 0.75 V
  • Supply voltage supervision range:
    • 1.2 V, 1.5 V, 1.8 V (TPS312x)
    • 3 V (TPS3125 devices only)
    • Other versions on request
  • Power-on reset generator with fixed delay time of 180 ms
  • Manual reset input (TPS3123/5/6/8)
  • Watchdog timer retriggers the RESET output at VDD ≥ VIT
  • Supply current of 14 µA (Typ)
  • Small SOT23-5 package
  • Temperature range of –40°C to +85°C
  • Reset output available in Push-Pull (Active Low and High) and Open-Drain (Active-Low)
  • Minimum supply voltage of 0.75 V
  • Supply voltage supervision range:
    • 1.2 V, 1.5 V, 1.8 V (TPS312x)
    • 3 V (TPS3125 devices only)
    • Other versions on request
  • Power-on reset generator with fixed delay time of 180 ms
  • Manual reset input (TPS3123/5/6/8)
  • Watchdog timer retriggers the RESET output at VDD ≥ VIT
  • Supply current of 14 µA (Typ)
  • Small SOT23-5 package
  • Temperature range of –40°C to +85°C
  • Reset output available in Push-Pull (Active Low and High) and Open-Drain (Active-Low)

The TPS312x family of voltage supervisory circuits provides voltage monitoring down to 1.2V rails and timing supervision, primarily for DSP and processor-based systems. All devices in the family monitor the power rail and assert RESET output when the power rail is under the threshold voltage target (VIT-). The threshold voltage is programmed into the device to minimize external components. Built-in hysteresis prevents false triggering. The RESET output is not valid for supply voltage (VDD) under 0.75 V. The TPS312x family includes devices with active high output for use as disable during malfunction and active low outputs for most systems where high output indicates properly functioning system.

The TPS3123/3124/3128 also include the watchdog timer functionality to monitor timely digital pulses from the processor and issue an alert if the expected pulse does not arrive on time due to potential software freeze or hang. Such integration of supply rail monitoring and the watch dog timer feature is very helpful in always on systems, such as Factory Automation and Communications Infrastructure.

In addition the TPS3123/5/6/8 devices incorporate a manual reset input, MR, to force RESET triggered by an event unrelated to the voltage rail monitoring of the pulses monitored by the watch dog timer. A low level at MR causes RESET to become active. The TPS3124 devices do not have the input MR, but include a high-level output RESET same as the TPS3125 and TPS3126 devices.

All devices in the family are available in a 5-pin SOT23-5 package and are characterized for operation over a temperature range of –40°C to +85°C.

The TPS312x family of voltage supervisory circuits provides voltage monitoring down to 1.2V rails and timing supervision, primarily for DSP and processor-based systems. All devices in the family monitor the power rail and assert RESET output when the power rail is under the threshold voltage target (VIT-). The threshold voltage is programmed into the device to minimize external components. Built-in hysteresis prevents false triggering. The RESET output is not valid for supply voltage (VDD) under 0.75 V. The TPS312x family includes devices with active high output for use as disable during malfunction and active low outputs for most systems where high output indicates properly functioning system.

The TPS3123/3124/3128 also include the watchdog timer functionality to monitor timely digital pulses from the processor and issue an alert if the expected pulse does not arrive on time due to potential software freeze or hang. Such integration of supply rail monitoring and the watch dog timer feature is very helpful in always on systems, such as Factory Automation and Communications Infrastructure.

In addition the TPS3123/5/6/8 devices incorporate a manual reset input, MR, to force RESET triggered by an event unrelated to the voltage rail monitoring of the pulses monitored by the watch dog timer. A low level at MR causes RESET to become active. The TPS3124 devices do not have the input MR, but include a high-level output RESET same as the TPS3125 and TPS3126 devices.

All devices in the family are available in a 5-pin SOT23-5 package and are characterized for operation over a temperature range of –40°C to +85°C.

Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Same functionality with different pin-out to the compared device
NEW TPS35 ACTIVE Nano-quiescent-current precision supervisor with watchdog timer Improved IQ and higher accuracy

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 6
Type Title Date
* Data sheet TPS3123 Ultra-Low Voltage Processor Supervisory Circuits datasheet (Rev. F) PDF | HTML 23 Dec 2020
E-book Voltage Supervisor and Reset ICs: Tips, Tricks and Basics 28 Jun 2019
Test report TIDA-00352 Test Results 11 Dec 2014
Test report TIDA-00309 Test Results 17 Nov 2014
Application note Video Aggregation HD-SDI Interface Application Sheet 01 Oct 2014
Application note Video Aggregation – Display Port Interface Application Sheet 16 Dec 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

TL16C750EEVM — TL16C750E 128-byte FIFO fractional baudrate UART evaluation module

This EVM provides the user with the ability to evaluate the TL16C750E device and its features. The EVM includes an onboard 3.3-V LDO as well as level translation for processors which operate at a higher voltage rail.
User guide: PDF
Not available on TI.com
Bill of materials (BOM)

TIDA-00309 BOM

TIDRBU7.PDF (184 KB)
Bill of materials (BOM)

TIDA-00352 BOM (Daughter Card)

TIDRC54.PDF (236 KB)
Bill of materials (BOM)

TIDA-00352 BOM (Motherboard)

TIDRC55.PDF (283 KB)
CAD/CAE symbol

TIDA-00309 CAD Files

TIDRBU9.ZIP (298 KB)
CAD/CAE symbol

TIDA-00352 CAD Files (Daughter Card)

TIDRC58.ZIP (1148 KB)
CAD/CAE symbol

TIDA-00352 CAD Files (Motherboard)

TIDRC59.ZIP (2759 KB)
Gerber file

TIDA-00309 Gerber

TIDC764.ZIP (2361 KB)
PCB layout

TIDA-00309 PCB

TIDRBU8.PDF (6984 KB)
PCB layout

TIDA-00352 PCB (Daughter Card)

TIDRC56.PDF (1522 KB)
PCB layout

TIDA-00352 PCB (Motherboard)

TIDRC57.PDF (6984 KB)
Schematic

TIDA-00309 Schematic

TIDRBU6.PDF (4146 KB)
Schematic

TIDA-00352 Schematic (Daughter Card)

TIDRC52.PDF (169 KB)
Schematic

TIDA-00352 Schematic (Motherboard)

TIDRC53.PDF (427 KB)
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Reference designs

TIDA-00352 — SDI Video Aggregation Reference Design

This verified reference design is a complete four channel SDI aggregation and de-aggregation solution. One TLK10022 is used to aggregate four synchronous HD-SDI sources together into one 5.94 Gbps serial link. The serial data is transferred via copper or optical fiber where a second TLK10022 is (...)
Test report: PDF
Schematic: PDF
Reference designs

TIDA-00309 — DisplayPort Video 4:1 Aggregation Reference Design

This verified reference design is a complete four channel DisplayPort aggregation and de-aggregation solution. One TLK10022 is used to aggregate four synchronous DisplayPort (DP) sources together into one 10.8 Gbps serial link. The serial data is transferred via copper or optical fiber where a (...)
Test report: PDF
Schematic: PDF
Package Pins Download
SOT-23 (DBV) 5 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos