Specifications
| Type | Description |
|---|---|
| Part Number | TMP461 |
| Manufacturer | Texas Instruments |
| Product Type | Remote and local temperature sensor |
| Category | Sensors |
| Package / Case | 10-pin WQFN (RUN), 2.00 mm x 2.00 mm nominal body |
| Remote diode temperature sensor accuracy | ±0.75 °C; Feature summary |
| Local temperature sensor accuracy | ±1 °C; Feature summary |
| Temperature resolution | 0.0625 °C; Local and remote channels |
| Supply voltage range | 1.7 to 3.6 V; Specified operating range |
| Operating current | 35 µA; 1 SPS |
| Shutdown current | 3 µA; Feature summary |
| Digital temperature code resolution | 12-bit; Local and remote temperature representation |
| Pin-programmable bus addresses | up to 9 addresses; Two-wire serial interface / SMBus |
| Operating temperature range | -40 to 125 °C; Device specified operation |
| V+ absolute maximum rating | -0.3 to 6 V; Over operating free-air temperature range |
| THERM, ALERT/THERM2, SDA, SCL input voltage absolute maximum | -0.3 to 6 V; Over operating free-air temperature range |
| D+, A0, A1 input voltage absolute maximum | -0.3 to (V+) + 0.3 V; Over operating free-air temperature range |
| D- input voltage absolute maximum | -0.3 to 0.3 V; Over operating free-air temperature range |
| Input current absolute maximum | 10 mA; Over operating free-air temperature range |
| Operating temperature absolute maximum | -55 to 150 °C; Stress rating |
| Maximum junction temperature | 150 °C; Stress rating |
| Storage temperature | -60 to 150 °C; Stress rating |
| ESD rating, HBM | ±2000 V; ANSI/ESDA/JEDEC JS-001 |
| ESD rating, CDM | ±1000 V; JEDEC JESD22-C101 |
| Recommended supply voltage | min 1.7 V, nom 3.3 V, max 3.6 V; Recommended operating conditions |
| Recommended free-air operating temperature | -40 to 125 °C; Recommended operating conditions |
| Junction-to-ambient thermal resistance | 123.1 °C/W; RUN WQFN, 10 pins |
| Junction-to-case top thermal resistance | 60.1 °C/W; RUN WQFN, 10 pins |
| Junction-to-board thermal resistance | 78.1 °C/W; RUN WQFN, 10 pins |
| Junction-to-top characterization parameter | 4.6 °C/W; RUN WQFN, 10 pins |
| Junction-to-board characterization parameter | 78.1 °C/W; RUN WQFN, 10 pins |
| Local temperature sensor accuracy | min -1 °C, typ ±0.125 °C, max +1 °C; TA=-10 °C to 100 °C, V+=1.7 V to 3.6 V |
| Local temperature sensor accuracy | min -1.25 °C, typ ±0.5 °C, max +1.25 °C; TA=-40 °C to 125 °C, V+=1.7 V to 3.6 V |
| Remote temperature sensor accuracy | min -0.75 °C, typ ±0.125 °C, max +0.75 °C; TA=0 °C to 100 °C, TD=-55 °C to 150 °C, V+=1.7 V to 3.6 V |
| Remote temperature sensor accuracy | min -1.5 °C, typ ±0.5 °C, max +1.5 °C; TA=-40 °C to 125 °C, TD=-55 °C to 150 °C, V+=1.7 V to 3.6 V |
| Temperature sensor error versus supply | min -0.25 °C/V, typ ±0.1 °C/V, max +0.25 °C/V; Local or remote, V+=1.7 V to 3.6 V |
| Temperature resolution | 0.0625 °C; Local and remote |
| ADC conversion time | typ 15 ms, max 17 ms; One-shot mode, per channel, local or remote |
| ADC resolution | 12 bits; Temperature measurement |
| Remote sensor source current, high | min 88 µA, typ 120 µA, max 152 µA; Remote sensor source current |
| Remote sensor source current, medium | min 33 µA, typ 45 µA, max 57 µA; Series resistance 1 kΩ max |
| Remote sensor source current, low | min 5.5 µA, typ 7.5 µA, max 9.5 µA; Remote sensor source current |
| Remote transistor ideality factor | 1.008; TMP461 optimized ideality factor |
| Serial interface high-level input voltage | 1.4 V; VIH |
| Serial interface low-level input voltage | 0.45 V; VIL |
| Serial interface input hysteresis | 200 mV; SMBus serial interface |
| SDA output low sink current | 6 mA; Serial interface |
| Serial interface low-level output voltage | typ 0.15 V, max 0.4 V; IO=-6 mA |
| Serial bus input leakage current | -1 to 1 µA; 0 V ≤ VIN ≤ 3.6 V |
| SCL serial bus input capacitance | typ 3 pF, max 6 pF; SCL pin |
| SDA serial bus input capacitance | typ 4.6 pF, max 9 pF; SDA pin |
| Serial bus clock frequency | 0.001 to 2.17 MHz; Serial interface |
| Serial bus timeout | min 20 ms, typ 25 ms, max 30 ms; Serial interface |
| A0/A1 high-level input voltage | 0.9(V+) to (V+) + 0.3 V; Digital inputs A0 and A1 |
| A0/A1 low-level input voltage | -0.3 to 0.1(V+) V; Digital inputs A0 and A1 |
| A0/A1 input leakage current | -1 to 1 µA; 0 V ≤ VIN ≤ 3.6 V |
| A0/A1 input capacitance | typ 2.5 pF, max 5 pF; Digital inputs A0 and A1 |
| THERM and ALERT/THERM2 output low sink current | 6 mA; Digital outputs |
| THERM and ALERT/THERM2 low-level output voltage | typ 0.15 V, max 0.4 V; IO=-6 mA |
| THERM and ALERT/THERM2 high-level output leakage current | 1 µA; VO=V+ |
| Specified supply voltage range | 1.7 to 3.6 V; V+ power supply |
| Quiescent current, active local conversion | typ 240 µA, max 375 µA; Active conversion, local sensor |
| Quiescent current, active remote conversion | typ 400 µA, max 600 µA; Active conversion, remote sensor |
| Quiescent current, standby mode | typ 15 µA, max 35 µA; Between conversions |
| Quiescent current, shutdown serial bus inactive | typ 3 µA, max 8 µA; Shutdown mode, serial bus inactive |
| Quiescent current, shutdown serial bus active at 400 kHz | 90 µA; Shutdown mode, serial bus active, fS=400 kHz |
| Quiescent current, shutdown serial bus active at 2.17 MHz | 350 µA; Shutdown mode, serial bus active, fS=2.17 MHz |
| Power-on reset threshold | typ 1.2 V, max 1.55 V; Rising edge |
| SCL operating frequency, fast mode | 0.001 to 0.4 MHz; Two-wire timing, V+=1.7 V to 3.6 V, -40 °C to 125 °C |
| SCL operating frequency, high-speed mode | 0.001 to 2.17 MHz; Two-wire timing, V+=1.7 V to 3.6 V, -40 °C to 125 °C |
| Bus free time between stop and start, fast mode | min 1300 ns; t(BUF), two-wire timing |
| Bus free time between stop and start, high-speed mode | min 160 ns; t(BUF), two-wire timing |
| Hold time after repeated start, fast mode | min 600 ns; t(HDSTA), after this period first clock is generated |
| Hold time after repeated start, high-speed mode | min 160 ns; t(HDSTA), after this period first clock is generated |
| Repeated start condition setup time, fast mode | min 600 ns; t(SUSTA), two-wire timing |
| Repeated start condition setup time, high-speed mode | min 160 ns; t(SUSTA), two-wire timing |
| Stop condition setup time, fast mode | min 600 ns; t(SUSTO), two-wire timing |
| Stop condition setup time, high-speed mode | min 160 ns; t(SUSTO), two-wire timing |
| Data hold time, fast mode | 0 to 900 ns; t(HDDAT), two-wire timing |
| Data hold time, high-speed mode | 0 to 150 ns; t(HDDAT), two-wire timing |
| Data setup time, fast mode | min 100 ns; t(SUDAT), two-wire timing |
| Data setup time, high-speed mode | min 40 ns; t(SUDAT), two-wire timing |
| SCL clock low period, fast mode | min 1300 ns; t(LOW), two-wire timing |
| SCL clock low period, high-speed mode | min 320 ns; t(LOW), two-wire timing |
| SCL clock high period, fast mode | min 600 ns; t(HIGH), two-wire timing |
| SCL clock high period, high-speed mode | min 60 ns; t(HIGH), two-wire timing |
| SDA data fall time, fast mode | max 300 ns; tF-SDA, two-wire timing |
| SDA data fall time, high-speed mode | max 130 ns; tF-SDA, two-wire timing |
| SCL clock fall and rise time, fast mode | max 300 ns; tF,tR-SCL, two-wire timing |
| SCL clock fall and rise time, high-speed mode | max 40 ns; tF,tR-SCL, two-wire timing |
| Rise time for SCL ≤ 100 kHz | max 1000 ns; tR, two-wire timing |
| A0 pin function | Address select; connect to GND, V+, or leave floating; Digital input pin 5 |
| A1 pin function | Address select; connect to GND, V+, or leave floating; Digital input pin 10 |
| ALERT/THERM2 pin output type | Open-drain digital output, requires pullup to 1.7 V to 3.6 V; Interrupt or SMBus alert output, configurable as second THERM output |
| THERM pin output type | Open-drain digital output, requires pullup to 1.7 V to 3.6 V; Thermal shutdown or fan-control pin |
| SDA pin interface | Open-drain bidirectional serial data, requires pullup to 1.7 V to 3.6 V; SMBus serial data line |
| SCL pin interface | Serial clock input, requires pullup to 1.7 V to 3.6 V if driven by open-drain output; SMBus serial clock line |
| Datasheet Status | request_only |
Product Overview
The TMP461 is a Texas Instruments remote and local temperature sensor for Sensor-category designs requiring both on-device and remote diode temperature measurement. It provides 0.0625 °C resolution on local and remote channels and represents temperature with 12-bit digital codes.
The specified supply range is 1.7 to 3.6 V, with recommended operation at 1.7 V minimum, 3.3 V nominal, and 3.6 V maximum. Recommended free-air operating temperature is -40 to 125 °C. Remote sensor accuracy is specified to ±0.75 °C under the 0 °C to 100 °C ambient and -55 °C to 150 °C remote-diode condition, while local accuracy is specified to ±1 °C over -10 °C to 100 °C.
The device uses a 10-pin WQFN (RUN) package with a 2.00 mm x 2.00 mm nominal body. SMBus serial interface pins include open-drain SDA and clock input SCL, with pullups to 1.7 V to 3.6 V as specified. A0 and A1 select up to 9 bus addresses, while THERM and ALERT/THERM2 support thermal shutdown, fan-control, interrupt, or SMBus alert functions.
Key Features
- Remote diode temperature sensor accuracy to ±0.75 °C
- Local temperature sensor accuracy to ±1 °C
- 0.0625 °C local and remote temperature resolution
- 12-bit digital temperature code representation
- 1.7 to 3.6 V specified supply range
- 35 µA operating current at 1 SPS
- 3 µA shutdown current in feature summary
- SMBus serial interface with up to 9 addresses
- THERM and ALERT/THERM2 open-drain outputs
- 10-pin WQFN package, 2.00 mm x 2.00 mm
Typical Applications
- Remote diode temperature monitoring
- Local board temperature monitoring
- SMBus temperature reporting
- Thermal shutdown signaling
- Fan-control temperature output
- Multi-address sensor buses
- Low-voltage temperature sensing
- High-speed two-wire sensor links
Procurement Notes
When requesting a quote for TMP461, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For memory and storage sourcing, density, organization, speed grade, voltage, package, temperature grade, date code, lifecycle status and original packing condition should be verified before approval.
FAQ
What type of sensor is the TMP461?
The TMP461 is a Texas Instruments remote and local temperature sensor. It measures local and remote channels with 0.0625 °C resolution and provides 12-bit digital temperature representation through an SMBus serial interface.
What supply voltage range does TMP461 support?
TMP461 is specified for a 1.7 to 3.6 V supply range. The recommended operating conditions list 1.7 V minimum, 3.3 V nominal, and 3.6 V maximum for V+.
What package is used for the TMP461?
The TMP461 is provided in a 10-pin WQFN package with RUN package designation and a 2.00 mm x 2.00 mm nominal body size.
How are bus addresses selected on TMP461?
TMP461 supports up to 9 pin-programmable bus addresses. The A0 and A1 pins are address-select inputs that can be connected to GND, connected to V+, or left floating.
What are the TMP461 alert output characteristics?
The ALERT/THERM2 and THERM pins are open-drain digital outputs requiring pullups to 1.7 V to 3.6 V. ALERT/THERM2 can operate as an interrupt or SMBus alert output, or as a second THERM output.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 28, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.