LM20BIM7X Temperature Sensor Equivalent & Substitute Parts

Part Overview

The LM20BIM7X is an analog local temperature sensor manufactured by Texas Instruments, designed for applications requiring temperature measurement across a -55°C to 130°C range. This device outputs analog voltage with a sensitivity of 11.77mV/°C and operates from a 2.4V to 5.5V supply. The LM20BIM7X is classified as "Not For New Designs," indicating it has been superseded. Finding equivalent or substitute parts is necessary for ongoing production support, maintenance applications, or when the original part becomes unavailable.

Key Parameters

Parameter	Value
Sensor Type	Analog, Local
Sensing Temperature Range	-55°C ~ 130°C
Output Type	Analog Voltage
Resolution	11.77mV/°C
Supply Voltage	2.4V ~ 5.5V
Accuracy	±1.5°C (±2.5°C)
Features	Shutdown Mode
Mounting Type	Surface Mount
Package	SC-70-5 (5-TSSOP)

Substitute Part Grouping Explanation

Substitution for the LM20BIM7X is determined by matching the following critical parameters:

Sensor type: Analog, local temperature measurement
Temperature range: -55°C to 130°C minimum
Output type: Analog voltage
Resolution: 11.77mV/°C
Supply voltage compatibility: Minimum 2.4V operation
Accuracy specification: ±1.5°C or better
Shutdown mode feature presence
Surface mount packaging

Two substitute parts meet these criteria:

LM20BIM7X/NOPB (Texas Instruments) — Direct equivalent with identical electrical specifications and improved product status
STLM20W87F (STMicroelectronics) — Cross-manufacturer equivalent with matching electrical performance and different package designation

Parameter Comparison

Parameter	LM20BIM7X	LM20BIM7X/NOPB	STLM20W87F
Manufacturer	Texas Instruments	Texas Instruments	STMicroelectronics
Sensor Type	Analog, Local	Analog, Local	Analog, Local
Temperature Range	-55°C ~ 130°C	-55°C ~ 130°C	-55°C ~ 130°C
Output Type	Analog Voltage	Analog Voltage	Analog Voltage
Resolution	11.77mV/°C	11.77mV/°C	11.77mV/°C
Supply Voltage	2.4V ~ 5.5V	2.4V ~ 5.5V	2.7V ~ 5.5V
Accuracy	±1.5°C (±2.5°C)	±1.5°C (±2.5°C)	±1.5°C (±2.5°C)
Features	Shutdown Mode	Shutdown Mode	Shutdown Mode
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	SC-70-5 (5-TSSOP)	SC-70-5 (5-TSSOP)	SOT-323-5
Product Status	Not For New Designs	Active	Active
RoHS Status	RoHS Non-Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Affected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

LM20BIM7X/NOPB is the primary substitute for the LM20BIM7X. This part is electrically identical with matching supply voltage range (2.4V ~ 5.5V), identical package (SC-70-5), and all functional parameters. The LM20BIM7X/NOPB carries Active product status versus the obsolete status of the original part. It is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. Direct pin-to-pin compatibility and identical PCB footprint allow drop-in replacement without design modification.

STLM20W87F is a secondary substitute from STMicroelectronics. All electrical specifications match the original part, including temperature range, resolution, accuracy, and shutdown mode functionality. The minimum supply voltage is 2.7V rather than 2.4V, which may affect applications operating at the lower voltage boundary. The package designation differs (SOT-323-5 versus SC-70-5), though both are 5-pin surface mount packages with compatible pinouts. ROHS3 compliance and REACH unaffected status align with modern regulatory standards. PCB layout verification is required due to package differences.

Frequently Asked Questions (FAQ)

Q: Can LM20BIM7X/NOPB replace LM20BIM7X directly on existing PCBs?

A: Yes. The LM20BIM7X/NOPB is pin-for-pin and footprint-compatible with the LM20BIM7X. No PCB modifications are required. Both use the SC-70-5 package with identical pinout and electrical characteristics.

Q: What is the key difference between LM20BIM7X and LM20BIM7X/NOPB?

A: The LM20BIM7X/NOPB includes "/NOPB" designation indicating lead-free, RoHS3 compliant manufacturing. The original LM20BIM7X is RoHS non-compliant and REACH affected. Electrical performance is identical.

Q: Can STLM20W87F be used as a substitute for LM20BIM7X?

A: Yes, with package considerations. The STLM20W87F provides identical electrical functionality and temperature range. However, the package is SOT-323-5 rather than SC-70-5. While both are 5-pin surface mount packages, physical dimensions and PCB footprints differ. PCB layout verification and potential rework may be necessary.

Q: What is the minimum supply voltage difference between STLM20W87F and the original LM20BIM7X?

A: The LM20BIM7X operates from 2.4V minimum, while STLM20W87F requires 2.7V minimum. Applications operating below 2.7V must use the LM20BIM7X or LM20BIM7X/NOPB.

Q: Are all three parts RoHS and REACH compliant?

A: The LM20BIM7X is RoHS non-compliant and REACH affected. Both LM20BIM7X/NOPB and STLM20W87F are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Q: What is the resolution specification for these temperature sensors?

A: All three parts provide 11.77mV/°C resolution across the -55°C to 130°C temperature range with ±1.5°C accuracy at 25°C to 30°C test conditions.

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