component
TMP423AIDCNT
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
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownTMP423AIDCNT
Texas Instruments · Temperature Sensors · SOT-23-8
TMP423AIDCNT 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 | DXP1 | passive | Channel 1 positive connection to remote temperature sensor. |
| 2 | DXP2 | passive | Channel 2 positive connection to remote temperature sensor. |
| 3 | DXP3 | passive | Channel 3 positive connection to remote temperature sensor. |
| 4 | DXN | passive | Common negative connection to remote temperature sensors, Channel 1, Channel 2, Channel 3. |
| 5 | GND | power_in | Ground. |
| 6 | SDA | bidirectional | Serial data line for SMBus, open-drain; requires pull-up resistor to V+. |
| 7 | SCL | input | Serial clock line for SMBus, open-drain; requires pull-up resistor to V+. |
| 8 | V+ | power_in | Positive supply voltage (2.7V to 5.5V). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-8 |
| Category | Sensors |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Local temperature sensor error | TELOCAL | -2.5 | 1.25 | 2.5 | °C | TA = -40°C to +125°C | 3 |
| Local temperature sensor error | -1.5 | 0.25 | 1.5 | °C | TA = +15°C to +85°C, V+ = 3.3V | 3 | |
| Remote temperature sensor error | TEREMOTE | -1 | 0.25 | 1 | °C | TA = +15°C to +85°C, TD = -40°C to +150°C, V+ = 3.3V | 3 |
| Remote temperature sensor error | TEREMOTE | -3 | 1 | 3 | °C | TA = -40°C to +100°C, TD = -40°C to +150°C, V+ = 3.3V | 3 |
| Remote temperature sensor error | TEREMOTE | -5 | 3 | 5 | °C | TA = -40°C to +125°C, TD = -40°C to +150°C | 3 |
| Temperature error vs supply (local/remote) | -0.5 | 0.2 | 0.5 | °C/V | V+ = 2.7V to 5.5V | 3 | |
| Specified voltage range | V+ | 2.7 | 5.5 | V | 3 | ||
| Quiescent current | IQ | 32 | 38 | μA | 0.0625 Conversions per Second | 3 | |
| Quiescent current | IQ | 400 | 525 | μA | Eight Conversions per Second | 3 | |
| Quiescent current, serial bus inactive, shutdown mode | IQ | 3 | 10 | μA | Serial Bus Inactive, Shutdown Mode | 3 | |
| Undervoltage lockout | UVLO | 2.3 | 2.4 | 2.6 | V | 3 | |
| Power-on reset threshold | POR | 1.6 | 2.3 | V | 3 | ||
| Logic input high voltage (SCL, SDA) | VIH | 2.1 | V | Logic Input High Voltage (SCL, SDA) | 3 | ||
| Logic input low voltage (SCL, SDA) | VIL | 0.8 | V | Logic Input Low Voltage (SCL, SDA) | 3 | ||
| SDA output low voltage | VOL | 0.15 | 0.4 | V | IOUT = 6mA | 3 | |
| Logic input current | -1 | 1 | μA | 0 ≤ VIN ≤ 6V | 3 | ||
| Specified temperature range | -40 | 125 | °C | 3 | |||
| Storage temperature range | -60 | 130 | °C | 3 | |||
| Power supply | VS | 7 | V | 2 | |||
| Input voltage, pins 1, 2, 3 and 4 | VIN | -0.5 | V | Pins 1, 2, 3, and 4 only; upper limit VS + 0.5 | 2 | ||
| Input voltage, pins 6 and 7 | VIN | -0.5 | 7 | V | Pins 6 and 7 only | 2 | |
| Input current | IIN | 10 | mA | 2 | |||
| Operating temperature range | -55 | 127 | °C | 2 | |||
| Junction temperature | TJ | 150 | °C | TJ max | 2 | ||
| ESD rating, human body model | 3000 | V | HBM | 2 | |||
| ESD rating, charged device model | 1000 | V | CDM | 2 | |||
| ESD rating, machine model | 200 | V | MM | 2 | |||
| SMBus input capacitance (SCL, SDA) | 3 | pF | 3 | ||||
| SMBus clock frequency | 3.4 | MHz | 3 | ||||
| SMBus timeout | 25 | 30 | 35 | ms | 3 | ||
| Conversion time (per channel) | 100 | 115 | 130 | ms | Per channel | 3 | |
| SCL falling edge to SDA valid time | 1 | μs | 3 | ||||
| Hysteresis | 500 | mV | 3 | ||||
| SMBus output low sink current | 6 | mA | 3 | ||||
| Remote sensor source current, high series resistance | 120 | μA | High Series Resistance 3kΩ Max | 3 | |||
| Remote sensor source current, medium high | 60 | μA | Medium High | 3 | |||
| Remote sensor source current, medium low | 12 | μA | Medium Low | 3 | |||
| Remote sensor source current, low | 6 | μA | Low | 3 | |||
| Remote transistor ideality factor | η | 1.008 | TMP421/22/23 Optimized Ideality Factor | 3 | |||
| Input capacitance (digital inputs) | 3 | pF | 3 | ||||
| Leakage input current | IIN | 1 | μA | 0V ≤ VIN ≤ V+ | 3 | ||
| Serial bus active, fS = 400kHz, shutdown mode | IQ | 90 | μA | Serial Bus Active, fS = 400kHz, Shutdown Mode | 3 | ||
| Serial bus active, fS = 3.4MHz, shutdown mode | IQ | 350 | μA | Serial Bus Active, fS = 3.4MHz, Shutdown Mode | 3 | ||
| Thermal resistance, junction to ambient (SOT23) | θJA | 100 | °C/W | SOT23 | 3 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper | caused by copper-to-solder connections. If these temperature sensor is not in good thermal contact | 24 |
CAD (KiCad official)
- Symbol:
TMP423AIDCNT - Footprint:
Package_TO_SOT_SMD:SOT-23-8 - 3D model: SOT-23-8 (KiCad packages3D, STEP)
- 3D model files:
tmp423aidcnt-etched.step/tmp423aidcnt-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tmp423aidcnt.step/tmp423aidcnt.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 2026-11-05, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(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).