TMP112AIDRLT Equivalent & Substitute Parts

Part Overview

The TMP112AIDRLT is a digital temperature sensor manufactured by Texas Instruments, designed for local temperature measurement applications. This component operates across a -40°C to 125°C range with 12-bit resolution and communicates via I2C/SMBus interface. The product is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations.

Substiute Parts

TMP112AIDRLT

Texas InstrumentsIn Stock: 34268TMP112AIDRLT Datasheet

Current PartRFQ

TMP112AIDRLR

UMWIn Stock: 129796TMP112AIDRLR Datasheet

MFR RecommendedRFQ

MCP9844T-BE/MNY

Microchip TechnologyIn Stock: 6644MCP9844T-BE/MNY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TMP112AIDRLT is determined by the following critical parameters:

Primary Compatibility Criteria:

• Output interface type (I2C/SMBus)
• Resolution (12-bit minimum)
• Package form factor (SOT-563 or compatible)
• Operating temperature range overlap with -40°C to 125°C
• Supply voltage compatibility within 1.4V to 3.6V range
• Surface mount mounting type

Substitute Parts Identified:

1. TMP112AIDRLR (UMW) - Direct functional equivalent with extended temperature range and improved accuracy specifications
2. MCP9844T-BE/MNY (Microchip Technology) - Alternative with compatible I2C interface and matching temperature operating range

Both substitutes maintain I2C/SMBus communication protocol, 12-bit resolution, and surface mount packaging required for direct replacement consideration.

Parameter Comparison

Engineering Selection Recommendations

TMP112AIDRLR Selection Criteria: This substitute maintains identical package form factor (SOT-563) and communication protocol (I2C/SMBus) as the original TMP112AIDRLT. The extended operating temperature range (-55°C to 150°C) provides broader application coverage. Improved accuracy specifications (±0.1°C versus ±0.5°C) and active product status support long-term availability. Supply voltage range expansion (1.4V to 5.5V) accommodates additional system configurations. ROHS3 compliance and unlimited moisture sensitivity level match the original component specifications.

MCP9844T-BE/MNY Selection Criteria: This substitute provides I2C interface compatibility and matching -40°C to 125°C operating temperature range. Active product status ensures sustained component availability. ROHS3 compliance aligns with regulatory requirements. Package form factor differs (8-TDFN versus SOT-563), requiring PCB layout modification. Accuracy specification (±3°C maximum) represents a trade-off compared to the original component. Supply voltage range (1.7V to 3.6V) remains compatible with the original specification.

Frequently Asked Questions (FAQ)

Q: Can TMP112AIDRLR directly replace TMP112AIDRLT without PCB modifications?

A: Yes. Both components use identical SOT-563 package form factor and I2C/SMBus communication protocol. Pin-to-pin compatibility is maintained, allowing direct substitution without circuit board redesign.

Q: What are the key differences between TMP112AIDRLR and the original TMP112AIDRLT?

A: TMP112AIDRLR extends the operating temperature range to -55°C to 150°C, improves accuracy to ±0.1°C, and expands supply voltage tolerance to 1.4V to 5.5V. Product status is active, ensuring long-term availability.

Q: Is MCP9844T-BE/MNY a pin-compatible replacement?

A: No. MCP9844T-BE/MNY uses 8-TDFN (2x3) package versus SOT-563 for the original component. PCB layout modification is required for implementation.

Q: What accuracy trade-offs exist with MCP9844T-BE/MNY?

A: MCP9844T-BE/MNY specifies ±3°C maximum accuracy compared to ±0.5°C for TMP112AIDRLT. This represents reduced precision suitable for applications with broader temperature measurement tolerances.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. Both TMP112AIDRLR and MCP9844T-BE/MNY maintain ROHS3 compliance, matching the original component's regulatory status.

Q: Which substitute provides the best compatibility for existing designs?

A: TMP112AIDRLR provides optimal compatibility due to identical package form factor, matching communication protocol, and pin-to-pin compatibility. No PCB modifications are required.

Q: What is the supply voltage compatibility range across all three components?

A: The overlapping supply voltage range across TMP112AIDRLT, TMP112AIDRLR, and MCP9844T-BE/MNY is 1.7V to 3.6V. TMP112AIDRLR supports extended range to 5.5V.