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Push-pull, supply voltage supervisor with manual reset

Same as: TPS3125L30DBVRG4   This part number is identical to the part number listed above. You can only order quantities of the part number listed above.

NEW - Custom reel may be available
Inventory: 55,577

Quality information

RoHS Yes
Lead finish / Ball material NIPDAU
MSL rating / Peak reflow Level-1-260C-UNLIM
Material content View
DPPM / MTBF / Fit rate View
Qualification summary View
Ongoing reliability monitoring View
Device marking View

Packaging information

Package | Pins Package qty | Carrier Operating temperature range (°C)
SOT-23 (DBV) | 5 3,000 | LARGE T&R
Custom reel may be available
-40 to 85
Package | Pins SOT-23 (DBV) | 5
Package qty | Carrier 3,000 | LARGE T&R
Custom reel may be available
Operating temperature range (°C) -40 to 85
View TI packaging information

Features for the TPS3125

  • 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)

Description for the TPS3125

The TPS312x family of ultralow voltage processor supervisory circuits provides circuit initialization and timing supervision, primarily for DSP and processor-based systems.

During power-on, RESET is asserted when the supply voltage (VDD) becomes higher than 0.75 V. Thereafter, the supply voltage supervisor monitors VDD and keeps RESET output 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 = 180 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 a high precision internal voltage divider.

The TPS3123/5/6/8 devices incorporate a manual reset input, MR. 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. In addition, the TPS3123/4/8 have a watchdog timer that needs to be triggered periodically by a positive or negative transition at WDI. When the supervising system fails to retrigger the watchdog circuit within the time-out interval ttout= 0.8 s, RESET output becomes active for the time period (td). This event also reinitializes the watchdog timer.

The circuits are available in a 5-pin SOT23-5 package. The TPS312x devices are characterized for operation over a temperature range of –40°C to +85°C.


Qty Price (USD)
1-99 $1.501
100-249 $1.240
250-999 $0.890
1,000+ $0.670

Additional package qty | carrier options

Package qty | Carrier 250 | SMALL T&R
Inventory 55,000
Qty | Price (USD) 1ku | $0.780 1-99 $1.747 100-249 $1.443 250-999 $1.037 1,000+ $0.780