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UCC2946DTR

Public Made by Adom

by adom

Texas Instruments Supervisor And Reset ICs, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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UCC2946DTR

Texas Instruments · Supervisor And Reset ICs · SOIC-8

UCC2946DTR from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 GND power_in Ground reference for the device; all voltages are specified with respect to GND.
2 RTH input Reset threshold input that compares its voltage to an internal 1.25-V reference (the threshold is 1.235 V elsewhere in the datasheet), and external resistors program the reset threshold.
3 RES output Reset output that is high only when RTH is above 1.235 V; it stays low for the reset period after RTH rises above the threshold and asserts low if RTH dips below 1.235 V for a duration set by Figure 1.
4 RP input Reset period programming pin, where an external capacitor CRP sets the reset period (TRP = 3.125 × CRP, TRP in ms, CRP in nF) and is charged by a 400 nA current source.
5 WDO output Watchdog output that is asserted low if WDI is not strobed or toggled within the watchdog period.
6 WP input Watchdog period programming pin, where an external capacitor CWP sets the watchdog period (TWP = 25 × CWP, TWP in ms, CWP in nF).
7 WDI input Watchdog timer input that must be toggled within the watchdog period to keep WDO deasserted; the logic thresholds are VIH ≥ 0.7×VDD and VIL ≤ 0.3×VDD.
8 VDD power_in Supply voltage for the device, specified at 2.1 V to 5.5 V for the UCC2946 (minimum operating voltage 1.1 V where RES is valid).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-8
Category Power Management (PMIC)
Pins 8

CAD (KiCad official)

  • Symbol: UCC2946DTR
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: ucc2946dtr-etched.step / ucc2946dtr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ucc2946dtr.step / ucc2946dtr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (20 pp, sha256 6dea29f2ee7ad735, retrieved 2026-10-10, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF