component
TMP421AIDCNT
Public Made by Adomby adom
Texas Instruments Temperature Sensors, SOT-23-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads on click. Unloads only if this page sits in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads on click. Unloads only if this page sits in the background.
PCB Footprint
Open full view ↗Loads on click. Unloads only if this page sits in the background.
Datasheet
Open in new tab ↗Loads on click. Unloads only if this page sits in the background.
README
markdownTMP421AIDCNT
Texas Instruments · Temperature Sensors · SOT-23-8
TMP421AIDCNT from Texas Instruments, in a SOT-23-8. 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 | DXP | passive | Positive connection to remote temperature sensor, accepts diode-connected transistor input for remote temperature measurement range -40°C to +150°C. |
| 2 | DXN | passive | Negative connection to remote temperature sensor, requires less than 5Ω effective series resistance and 100pF differential input capacitance. |
| 3 | A1 | input | Address pin with input logic levels VIH = 0.7(V+) to (V+)+0.5V and VIL = -0.5V to 0.3(V+). |
| 4 | A0 | input | Address pin with input logic levels VIH = 0.7(V+) to (V+)+0.5V and VIL = -0.5V to 0.3(V+). |
| 5 | GND | power_in | Ground connection, reference potential for device. |
| 6 | SDA | bidirectional | Serial data line for SMBus two-wire interface, open-drain output requiring pull-up resistor to V+, input threshold VIH = 2.1V and VIL = 0.8V. |
| 7 | SCL | bidirectional | Serial clock line for SMBus two-wire interface, open-drain output requiring pull-up resistor to V+, input threshold VIH = 2.1V and VIL = 0.8V. |
| 8 | V+ | power_in | Positive supply voltage 2.7V to 5.5V for TMP421 (2.55V to 5.5V for TMP421C), with quiescent current 32-38µA at 0.0625 conversions per second. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-8 |
| Category | Sensors |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
TMP421AIDCNT - Footprint:
Package_TO_SOT_SMD:SOT-23-8 - 3D model: SOT-23-8 (KiCad packages3D, STEP)
- 3D model files:
tmp421aidcnt-etched.step/tmp421aidcnt-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tmp421aidcnt.step/tmp421aidcnt.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (36 pp, sha256
a8969604cee2986f, retrieved 2026-10-05, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).