TPS3820-33DBVR
Public Made by Adomby adom
Texas Instruments Supervisor and Reset ICs, SOT-23-5. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
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README
markdownTPS3820-33DBVR
Texas Instruments · Supervisor and Reset ICs · SOT-23-5
TPS3820-33DBVR from Texas Instruments, in a SOT-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 | Active-low reset output (push-pull). Driven low when VDD is below the 2.93 V (typ) threshold, when MR is pulled low, or when the watchdog input WDI stops toggling within the watchdog time-out window. Remains low for the reset delay (25 ms typ) after the fault clears. |
| 2 | GND | power_in | Ground connection. Reference for VDD and all logic thresholds. |
| 3 | MR | input | Active-low manual reset input. Pulling low forces the reset output active; reset remains asserted while MR is low and for the reset delay time after MR returns high. Has an internal ~52 kOhm pull-up to VDD; may be left unconnected or tied to VDD if unused. |
| 4 | WDI | input | Watchdog timer input. Must be toggled (rising or falling edge) within the 200 ms (typ) watchdog time-out window or a reset is triggered. The timer clears when reset is asserted or when a valid edge is observed on WDI. If unused, leave in high impedance to prevent spurious reset events. |
| 5 | VDD | power_in | Supply voltage input; also the monitored rail. Operating range 1.1 V to 5.5 V; the TPS3820-33 variant has a fixed negative-going threshold of 2.93 V (typ) with 30 mV hysteresis. Bypass with a 0.1 uF ceramic near the pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-5 |
| Category | PMIC |
| Pins | 5 |
Ordering variants
Same part, different packaging or reel option.
TPS3820-33DBVRTPS3820-33DBVRDBVT
CAD (KiCad official)
- Symbol:
TPS3820-33DBVR - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
tps3820-33dbvr-etched.step/tps3820-33dbvr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tps3820-33dbvr.step/tps3820-33dbvr.glbare the bare package body.
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
tps3820-33dbvr.step |
85 KB | You want the bare part, or you mark your own boards. |
tps3820-33dbvr-etched.step |
3.0 MB | You want the part with TPS3820-33DBVR already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 697 faces against 102 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (29 pp, sha256
7d030820fd9ee51e, 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).