TMP117AIYBGR Temperature Sensor Equivalent & Substitute Parts

Part Overview

The TMP117AIYBGR is an active digital temperature sensor manufactured by Texas Instruments, designed for local temperature measurement applications. This device operates across a wide temperature range of -55°C to 150°C with 16-bit resolution and I2C/SMBus output interface. The sensor features programmable limit thresholds, standby mode, shutdown mode, and one-shot measurement capability. With ±0.1°C accuracy in the -20°C to 50°C range and ±0.3°C accuracy across the full operating range, the TMP117AIYBGR serves applications requiring high-precision thermal monitoring. Alternative components may be required due to supply constraints, design optimization, or specific application requirements.

Substiute Parts

TMP117AIYBGR

Texas InstrumentsIn Stock: 35332TMP117AIYBGR Datasheet

Current PartRFQ

MCP9844T-BE/MNY

Microchip TechnologyIn Stock: 6644MCP9844T-BE/MNY Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TMP117AIYBGR with the MCP9844T-BE/MNY is based on the following common electrical and mechanical parameters:

Common Criteria:

• Output interface: Both devices support I2C serial communication protocol
• Sensor classification: Both are digital temperature sensors with internal sensing elements
• Mounting technology: Both use surface mount technology
• Supply voltage compatibility: Both operate within overlapping voltage ranges (TMP117: 1.8V ~ 5.5V; MCP9844: 1.7V ~ 3.6V)
• Regulatory compliance: Both are ROHS3 compliant with MSL rating of 1
• ECCN and HTSUS classification: Identical commodity codes

Substitution Limitations: The MCP9844T-BE/MNY operates within a narrower temperature range (-40°C ~ 125°C) compared to the TMP117AIYBGR (-55°C ~ 150°C). The MCP9844 provides lower accuracy (±3°C maximum) and lower resolution (8-bit internal sensor with register bank topology) than the TMP117. Package form factors differ: TMP117 uses 6-DSBGA while MCP9844 uses 8-TDFN. These differences must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Both the TMP117AIYBGR and MCP9844T-BE/MNY are active products with ROHS3 compliance and identical regulatory classifications (ECCN: EAR99, HTSUS: 8542.39.0001). Selection between these components must be based on application-specific requirements:

The TMP117AIYBGR is suitable for applications requiring extended temperature measurement capability beyond 125°C, high-resolution 16-bit output, and superior accuracy specifications. The device's programmable limit features and multiple operational modes support complex thermal management scenarios.

The MCP9844T-BE/MNY is applicable for applications operating within the -40°C to 125°C range where lower accuracy tolerance is acceptable and supply voltage is constrained to 3.6V maximum. The device includes integrated alarm and fan control outputs, providing additional functionality for thermal management systems.

Both components maintain unlimited moisture sensitivity levels and are suitable for standard PCB assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the MCP9844T-BE/MNY directly replace the TMP117AIYBGR without firmware modification?

A: Direct replacement requires verification of three critical factors: (1) application operating temperature must remain within -40°C to 125°C; (2) system accuracy requirements must tolerate ±3°C maximum deviation; (3) PCB layout must accommodate the different package footprint (6-DSBGA versus 8-TDFN). I2C protocol compatibility exists, but register mapping and command structures differ between devices.

Q: What are the package footprint differences?

A: The TMP117AIYBGR uses a 6-DSBGA package measuring 1.49mm × 0.95mm. The MCP9844T-BE/MNY uses an 8-TDFN package measuring 2mm × 3mm. These different form factors require separate PCB layout designs and cannot use identical footprints.

Q: Are both devices suitable for high-temperature applications above 125°C?

A: Only the TMP117AIYBGR supports operation up to 150°C. The MCP9844T-BE/MNY maximum operating temperature is 125°C and is not suitable for applications requiring higher temperature measurement capability.

Q: What is the resolution difference impact?

A: The TMP117AIYBGR provides 16-bit resolution with ±0.1°C accuracy in the -20°C to 50°C range. The MCP9844T-BE/MNY provides 8-bit internal sensor resolution with ±3°C maximum accuracy. Applications requiring temperature discrimination below 1°C require the TMP117AIYBGR.

Q: Do both devices support I2C communication?

A: Yes. The TMP117AIYBGR supports I2C/SMBus protocol. The MCP9844T-BE/MNY supports 2-Wire Serial and I2C protocol. Both use standard I2C bus architecture, though register definitions and command sets are manufacturer-specific.

Q: Are there supply voltage compatibility concerns?

A: The TMP117AIYBGR operates from 1.8V to 5.5V. The MCP9844T-BE/MNY operates from 1.7V to 3.6V. Systems using supply voltages above 3.6V cannot use the MCP9844T-BE/MNY without additional voltage regulation.