TMP117AIYBGT Temperature Sensor Equivalent & Substitute Parts

Part Overview

The TMP117AIYBGT is a digital temperature sensor manufactured by Texas Instruments, designed for local temperature measurement across a -55°C to 150°C range with 16-bit resolution and I2C/SMBus output. The device operates on supply voltages from 1.8V to 5.5V and features programmable limit thresholds, standby mode, shutdown mode, and one-shot measurement capability. Currently classified as Last Time Buy, alternative equivalent parts are necessary for new designs and long-term supply continuity.

Substiute Parts

TMP117AIYBGT

Texas InstrumentsIn Stock: 1090TMP117AIYBGT Datasheet

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TMP117AIYBGR

Texas InstrumentsIn Stock: 35332TMP117AIYBGR Datasheet

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MCP9844T-BE/MNY

Microchip TechnologyIn Stock: 6644MCP9844T-BE/MNY Datasheet

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MCP9844T-BE/MNYAA

Microchip TechnologyIn Stock: 1241MCP9844T-BE/MNYAA Datasheet

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MCP9844T-BE/MNYAB

Microchip TechnologyIn Stock: 6664MCP9844T-BE/MNYAB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the TMP117AIYBGT is determined by the following critical parameters:

Primary Substitution Criteria:

• Sensor type (digital, local temperature measurement)
• Temperature sensing range (-55°C to 150°C minimum coverage)
• Output interface (I2C/SMBus compatibility)
• Resolution (16-bit preferred for equivalent functionality)
• Supply voltage compatibility (1.8V to 5.5V range)
• Accuracy specification (±0.1°C to ±0.3°C range)
• Package form factor (6-DSBGA surface mount)

Substitute Classification:

Direct Equivalent (Same Manufacturer, Different Packaging): TMP117AIYBGR is the direct equivalent from Texas Instruments, differing only in packaging format (Cut Tape & Digi-Reel® versus Tape & Reel). All electrical and functional parameters remain identical.

Cross-Manufacturer Alternatives (Functional Equivalents): MCP9844T-BE/MNY, MCP9844T-BE/MNYAA, and MCP9844T-BE/MNYAB are Microchip Technology devices that provide I2C temperature monitoring functionality. These parts operate within overlapping temperature ranges (-40°C to 125°C) and share I2C output compatibility. However, they exhibit differences in accuracy specification (±3°C maximum versus ±0.1°C), resolution implementation, and package form factor (8-TDFN versus 6-DSBGA).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Recommended for Existing Designs): TMP117AIYBGR is the preferred substitute for TMP117AIYBGT. Both devices are manufactured by Texas Instruments with identical electrical specifications, accuracy, resolution, and temperature range. The only difference is packaging format. This part maintains Active product status, ensuring long-term availability and supply continuity.

For Cross-Manufacturer Substitution (Design Flexibility Required): MCP9844T-BE/MNY, MCP9844T-BE/MNYAA, and MCP9844T-BE/MNYAB are viable alternatives when design modifications are acceptable. These Microchip Technology devices provide I2C interface compatibility and operate within a -40°C to 125°C range. However, substitution requires acceptance of the following trade-offs:

• Reduced accuracy specification (±3°C maximum versus ±0.1°C)
• Narrower upper temperature limit (125°C versus 150°C)
• Lower maximum supply voltage (3.6V versus 5.5V)
• Different package form factor (8-TDFN versus 6-DSBGA)
• Potential PCB layout redesign requirements

All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and Active product status, ensuring regulatory compliance and supply availability.

Frequently Asked Questions (FAQ)

Q: Can TMP117AIYBGR be used as a direct drop-in replacement for TMP117AIYBGT? A: Yes. TMP117AIYBGR is electrically and functionally identical to TMP117AIYBGT. The only difference is the packaging format (Cut Tape & Digi-Reel® versus Tape & Reel). No circuit modifications are required.

Q: What are the key limitations when substituting with MCP9844T-BE series devices? A: The MCP9844T-BE series has three primary limitations: accuracy is ±3°C compared to ±0.1°C for the TMP117, maximum operating temperature is 125°C versus 150°C, and maximum supply voltage is 3.6V versus 5.5V. Additionally, the package form factor differs (8-TDFN versus 6-DSBGA), requiring PCB layout changes.

Q: Are all substitute parts RoHS compliant? A: Yes. TMP117AIYBGR, MCP9844T-BE/MNY, MCP9844T-BE/MNYAA, and MCP9844T-BE/MNYAB are all ROHS3 compliant.

Q: What is the difference between TMP117AIYBGR packaging options? A: TMP117AIYBGR is available in Cut Tape (CT) & Digi-Reel® format, whereas the original TMP117AIYBGT uses Tape & Reel (TR) packaging. Both formats contain identical components; the difference is in the delivery and handling method.

Q: Can MCP9844T-BE/MNY, MCP9844T-BE/MNYAA, and MCP9844T-BE/MNYAB be used interchangeably? A: These three MCP9844 variants share identical electrical specifications and I2C interface. The differences are in packaging format (Cut Tape & Digi-Reel® for MCP9844T-BE/MNY, Tape & Reel for MCP9844T-BE/MNYAA, and unspecified for MCP9844T-BE/MNYAB). They are functionally interchangeable from an electrical standpoint.

Q: Is the I2C interface compatible between TMP117 and MCP9844 devices? A: Both device families use I2C/2-Wire Serial communication protocols. However, register maps and command structures may differ. Firmware or software modifications may be required to accommodate device-specific register definitions and control sequences.

Q: What supply voltage range should be used for cross-manufacturer substitution? A: When substituting with MCP9844T-BE series, the design must operate within the 1.7V to 3.6V range, which is the overlapping specification. The TMP117 supports 1.8V to 5.5V, but MCP9844 devices are limited to 3.6V maximum.