Part A
TMP101NA/3K
Texas Instruments
- Lifecycle
- Active
- Stock
- 3015 PCS
- Package
- SOT-23-6
- Series
- Temperature Sensors - Analog and Digital Output
Replacement verdict
Compatible functional replacement candidate
The TMP100MDBVREP and TMP101NA/3K are both I2C/SMBus digital temperature sensors with comparable accuracy and supply voltage ranges, making the TMP100MDBVREP a viable functional replacement candidate for the TMP101NA/3K in many designs. However, designers must account for differences in alert functionality, package footprint, and address pin configuration before committing to a drop-in substitution.
Output Type
High match
Alert Function
Validation required
Package Type
Not compatible
Address Configuration
Validation required
Parts at a glance
Part B
TMP100MDBVREP
Texas Instruments
- Lifecycle
- Active
- Stock
- 1370 PCS
- Package
- SOT-23-6
- Series
- Temperature Sensors - Analog and Digital Output
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | TMP100MDBVREP | TMP101NA/3K | Why it matters |
|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Same manufacturer ensures consistent quality standards and support ecosystem. |
| Package / Case | SOT-23-6 | SOT-23-6 | Identical footprint allows drop-in PCB replacement without layout changes. |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | Matching voltage range ensures compatibility with the same power rails. |
| Temperature Measurement Range | -55°C to +125°C | -55°C to +125°C | Equivalent sensing range supports the same application environments. |
| Interface Type | I2C / SMBus | I2C / SMBus | Same digital interface enables direct protocol-level substitution. |
| Resolution | 9 to 12 bits (programmable) | 9 to 12 bits (programmable) | Identical resolution options preserve measurement accuracy characteristics. |
| Temperature Accuracy | ±0.5°C (typical, 0°C to +85°C) | ±0.5°C (typical, 0°C to +85°C) | Matching accuracy ensures equivalent system performance after substitution. |
| Alert / Thermostat Output | No | Yes (open-drain) | The TMP101 provides a hardware alert pin for over/under temperature events, which the TMP100 lacks. |
| Number of I2C Addresses | 8 selectable addresses | 3 selectable addresses | Different address counts affect how many sensors can share the same bus. |
| Operating Temperature Grade | Enhanced product (EP) / military-grade screening | Industrial / commercial grade | The enhanced-product variant offers additional reliability screening for harsh or mission-critical applications. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | TMP101NA/3K | TMP100MDBVREP |
|---|---|---|
| Part Status | Active | Active |
| Sensor Type | Digital, Local | Digital, Local |
| Sensing Temperature - Local | -55°C ~ 125°C | -55°C ~ 125°C |
| Output Type | I²C/SMBus | I²C/SMBus |
| Voltage - Supply | 2.7V ~ 5.5V | 2.7V ~ 5.5V |
| Resolution | 11 b | 11 b |
| Features | One-Shot, Output Switch, Programmable Resolution, Shutdown Mode, Standby Mode | One-Shot, Output Switch, Programmable Resolution, Shutdown Mode, Standby Mode |
| Accuracy - Highest(Lowest) | ±2°C (±3°C) | ±2°C (±3°C) |
| Test Condition | -25°C ~ 85°C (-55°C ~ 125°C) | -25°C ~ 85°C (-55°C ~ 125°C) |
| Operating Temperature | -55°C ~ 125°C | -55°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the TMP100MDBVREP and the TMP101NA/3K?
The TMP100MDBVREP is an enhanced product (EP) digital temperature sensor in a SOT-23-6 package with an I2C/SMBus interface and an ALERT output. The TMP101NA/3K is a standard digital temperature sensor in a SOT-23-6 package with an I2C/SMBus interface and a dedicated SMBus ALERT output. Both are 12-bit resolution sensors with ±0.5°C typical accuracy over the -25°C to +85°C range, but the TMP100MDBVREP is qualified for enhanced product requirements including extended temperature operation and controlled manufacturing baseline.
Are the TMP100MDBVREP and TMP101NA/3K pin-compatible?
Yes, both devices are offered in the same 6-pin SOT-23 (DBV) package and share the same pinout: pin 1 = SDA, pin 2 = SCL, pin 3 = ALERT, pin 4 = GND, pin 5 = ADD0, pin 6 = V+. This allows for a common PCB footprint, but electrical and functional differences must still be verified before substitution.
What is the supply voltage range for each device?
The TMP100MDBVREP operates from 2.7 V to 5.5 V. The TMP101NA/3K operates from 2.7 V to 5.5 V. Both devices are specified for a supply voltage range of 2.7 V to 5.5 V, making them compatible with common 3.3 V and 5 V logic systems.
What is the temperature measurement range and accuracy of these sensors?
The TMP100MDBVREP is specified for a temperature range of -55°C to +125°C, with ±0.5°C typical accuracy from -25°C to +85°C and ±1°C maximum accuracy from -40°C to +125°C. The TMP101NA/3K is specified for a temperature range of -55°C to +125°C, with ±0.5°C typical accuracy from -25°C to +85°C and ±1°C maximum accuracy from -40°C to +125°C. Both provide 12-bit resolution (0.0625°C per LSB).
What is the difference in the ALERT output behavior between the two devices?
The TMP100MDBVREP features an ALERT output that can be configured as an interrupt or comparator output with programmable fault queue and polarity. The TMP101NA/3K features a dedicated SMBus ALERT output that is active low and can be programmed for fault queue and polarity. The functional behavior is similar, but the TMP101NA/3K is specifically designed for SMBus alert response protocol compatibility.
Can the TMP100MDBVREP be used as a drop-in replacement for the TMP101NA/3K?
Pin-compatible and functionally similar, but not a guaranteed drop-in replacement. The TMP100MDBVREP is an enhanced product with a different qualification flow and may have different default register settings, alert configuration options, and timing specifications. The designer must verify the I2C address options, alert polarity, fault queue defaults, and any enhanced product requirements against the target application.
What are the I2C address options for each device?
The TMP100MDBVREP supports four selectable I2C addresses via the ADD0 pin: 1001000, 1001001, 1001010, and 1001011 (7-bit). The TMP101NA/3K supports three selectable I2C addresses via the ADD0 pin: 1001000, 1001001, and 1001010 (7-bit). The TMP101NA/3K does not support the 1001011 address option.
What are the operating temperature grades and qualification differences?
The TMP100MDBVREP is an enhanced product (EP) qualified with a controlled manufacturing baseline, extended temperature operation, and additional testing per Texas Instruments enhanced product requirements. The TMP101NA/3K is a standard catalog product. Both are specified for -55°C to +125°C operation, but the TMP100MDBVREP carries enhanced product documentation and change control.