EMC1001-AFZQ-TR Equivalent & Substitute Parts

Part Overview

The EMC1001-AFZQ-TR is a digital temperature sensor manufactured by Microchip Technology, designed for local temperature measurement within the -25°C to 125°C range. This device operates via SMBus interface with 10-bit resolution and is housed in a SOT-6 surface mount package. The product status is obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and component procurement.

Substiute Parts

EMC1001-AFZQ-TR

Microchip TechnologyIn Stock: 2245EMC1001-AFZQ-TR Datasheet

Current PartRFQ

LM73CIMK-0/NOPB

Texas InstrumentsIn Stock: 35206LM73CIMK-0/NOPB Datasheet

DirectRFQ

LM73CIMK-1/NOPB

Texas InstrumentsIn Stock: 17350LM73CIMK-1/NOPB Datasheet

DirectRFQ

LM73CIMKX-0/NOPB

Texas InstrumentsIn Stock: 55291LM73CIMKX-0/NOPB Datasheet

DirectRFQ

LM73CIMKX-1/NOPB

Texas InstrumentsIn Stock: 26494LM73CIMKX-1/NOPB Datasheet

DirectRFQ

STTS751-0DP3F

STMicroelectronicsIn Stock: 40988STTS751-0DP3F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the EMC1001-AFZQ-TR is determined by the following critical parameters:

Primary Compatibility Criteria:

• Sensor Type: Digital, Local temperature measurement
• Output Interface: SMBus or I2C/SMBus compatible
• Package Type: SOT-23-6 or equivalent surface mount footprint
• Operating Temperature Range: Must encompass or exceed -25°C to 125°C
• Voltage Supply Range: Must accommodate 3V to 3.6V operation
• Resolution: Minimum 10-bit
• Accuracy: ±1.5°C or better at nominal conditions

Substitute Categories:

Category 1 - Direct SMBus Substitutes (Texas Instruments LM73 Series): The LM73CIMK-0/NOPB, LM73CIMK-1/NOPB, LM73CIMKX-0/NOPB, and LM73CIMKX-1/NOPB devices provide SMBus/I2C interface compatibility with extended temperature range (-40°C to 150°C), higher resolution (13-bit), and broader voltage supply tolerance (2.7V to 5.5V). All variants maintain SOT-23-6 packaging and ±1.5°C accuracy specification.

Category 2 - Manufacturer-Recommended Alternative (STMicroelectronics STTS751-0DP3F): The STTS751-0DP3F offers SMBus interface with operating range of -40°C to 125°C, 11-bit resolution, and voltage supply of 2.25V to 3.6V. This device is housed in a 6-UDFN (2x2) package and represents the manufacturer-recommended substitute path.

Parameter Comparison

Engineering Selection Recommendations

For Footprint-Compatible Substitution (SOT-23-6 Package):

The LM73CIMKX-0/NOPB and LM73CIMKX-1/NOPB are the preferred alternatives. Both devices maintain active product status, offer ROHS3 compliance, and provide superior moisture sensitivity ratings (MSL 1 vs. MSL 3). The extended temperature range (-40°C to 150°C) and higher resolution (13-bit) exceed the original specification. The LM73CIMKX-1/NOPB variant is recommended for designs requiring the lowest temperature threshold at -40°C with active manufacturer support and 26,400 units in current inventory.

For Manufacturer-Recommended Path:

The STTS751-0DP3F represents the manufacturer-recommended substitute with active product status and 40,950 units in inventory. This device requires PCB layout modification due to the 6-UDFN (2x2) package footprint but maintains SMBus interface compatibility and ROHS3 compliance. The operating temperature range (-40°C to 125°C) directly encompasses the original specification.

Compliance Considerations:

All substitute options maintain ROHS3 compliance and REACH unaffected status, consistent with the original EMC1001-AFZQ-TR. The LM73 series devices offer improved moisture sensitivity ratings (MSL 1 unlimited vs. MSL 3 168 hours), reducing handling and storage constraints.

Frequently Asked Questions (FAQ)

Q: Can the LM73CIMKX-0/NOPB directly replace the EMC1001-AFZQ-TR without PCB modification?

A: Yes. Both devices use SOT-23-6 surface mount packaging with identical pinout compatibility for SMBus/I2C interface operation. No PCB layout changes are required.

Q: What is the difference between LM73CIMK and LM73CIMKX variants?

A: The LM73CIMKX variants are active products with current manufacturer support, while LM73CIMK variants are obsolete. Both share identical electrical specifications and packaging. The LM73CIMKX series is recommended for new designs.

Q: Does the STTS751-0DP3F require circuit design changes?

A: The STTS751-0DP3F maintains SMBus interface compatibility but uses a 6-UDFN (2x2) package instead of SOT-23-6. PCB footprint redesign is necessary. Electrical interface and supply voltage requirements are compatible with the original design.

Q: Are the LM73 devices backward compatible with SMBus-only systems?

A: Yes. The LM73 series supports both I2C and SMBus protocols. Systems designed for SMBus operation will function without modification.

Q: What is the significance of the MSL rating difference?

A: The original EMC1001-AFZQ-TR has MSL 3 (168 hours), requiring controlled storage conditions. All substitute options have MSL 1 (unlimited), eliminating moisture sensitivity constraints and reducing component handling complexity.

Q: Which substitute offers the best long-term availability?

A: The LM73CIMKX-0/NOPB and LM73CIMKX-1/NOPB maintain active product status with Texas Instruments, ensuring continued availability and manufacturer support. The STTS751-0DP3F is also active with STMicroelectronics.

Q: Can multiple substitute parts be used interchangeably in the same design?

A: The LM73CIMKX-0/NOPB and LM73CIMKX-1/NOPB are interchangeable for SOT-23-6 footprints. The STTS751-0DP3F requires separate PCB layout due to package differences but provides equivalent functional performance.