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CAT823TTDI-GT3

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by Ray

onsemi Supervisor and Reset ICs, TSOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpmiccat823ttdi-gt3
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Contents

README

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CAT823TTDI-GT3

onsemi · Supervisor and Reset ICs · TSOT-23-5

CAT823TTDI-GT3 from onsemi, in a TSOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 RESET output CMOS push-pull active-LOW reset output (RESET, bar). Driven low whenever VCC < VRST (3.08 V typ for the T version), while MR is held low, or on a watchdog timeout, then held low for tRP (200 ms typ, 400 ms max) after the fault clears. VOL <= 0.3 V at 1.2 mA sink; VOH >= 0.8 x VCC at 30 uA source.
2 GND power_in Ground / device return. 0 V reference for all logic thresholds and outputs.
3 MR input Manual Reset input (MR, active low). Internally pulled high by a 52 kOhm (35-75 kOhm) resistor and designed to be driven low by a pushbutton, open-drain, or CMOS output. Pulling MR low asserts RESET; on release the reset stays active for tRP (140 ms min). VIL <= 0.3 x VCC, VIH >= 0.7 x VCC, minimum valid pulse width tPB = 1 us, noise immunity 100 ns.
4 WDI input Watchdog Timer Input. Must see a low-to-high or high-to-low transition within tWD (1.6 s typ, 3.2 s max) or RESET is pulled active for tRP. Can be disabled by leaving open or tri-stating (internally serviced within the timeout period). VIL <= 0.3 x VCC, VIH >= 0.7 x VCC, min pulse width 50 ns.
5 VCC power_in Supply voltage input. Recommended operating range 1.2 to 5.5 V (over -40 to +85 C); absolute maximum 6 V. Typical supply current ICC = 4 uA (12 uA max) for the CAT823 T version. Monitored against the VRST threshold (3.08 V typ for T suffix) to generate RESET.

Key specifications

Parameter Value
Manufacturer onsemi
Package TSOT-23-5
Category PMIC
Pins 5

Ordering variants

Same part, different packaging or reel option.

  • CAT823TTDI-GT3
  • CAT823TTDI-GT3STDI-GT3
  • CAT823TTDI-GT3RTDI-GT3
  • CAT823TTDI-GT3ZTDI-GT3
  • CAT823TTDI-GT3YTDI-GT3

CAD (KiCad official)

  • Symbol: CAT823TTDI-GT3
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: TSOT-23-5 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: onsemi datasheet (11 pp, sha256 c3276e3d139e9445, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF