TS931AILT Equivalent & Substitute Parts

Part Overview

The TS931AILT is a general-purpose operational amplifier manufactured by STMicroelectronics, packaged in SOT-23-5 surface mount configuration. This rail-to-rail output amplifier operates across a 2.7 V to 10 V supply range and is designed for low-power applications requiring minimal input bias current. The device is currently in active product status with 23,250 units in stock.

Substitute parts are necessary when the TS931AILT reaches end-of-life status, when alternative sourcing is required for supply chain continuity, or when application requirements necessitate different electrical performance characteristics within the same package form factor.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Package / Case	SC-74A, SOT-753	—
Supplier Device Package	SOT-23-5	—
Mounting Type	Surface Mount	—
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	10	V
Operating Temperature	-40 to 105	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the TS931AILT is determined by the following mandatory parameters:

Primary Compatibility Criteria:

Amplifier Type: General Purpose
Number of Circuits: 1
Output Type: Rail-to-Rail
Package / Case: SC-74A, SOT-753
Supplier Device Package: SOT-23-5
Mounting Type: Surface Mount

Secondary Compatibility Criteria:

Voltage - Supply Span (Min): ≥ 2.5 V (must support minimum 2.7 V operation)
Voltage - Supply Span (Max): ≥ 10 V (must support maximum 10 V operation)
Operating Temperature Range: Must encompass -40°C to 105°C or be compatible with application requirements

All substitute parts listed maintain identical package form factors and pinout compatibility. Electrical performance parameters (slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, and output current) vary among substitutes and must be evaluated against specific application requirements.

Parameter Comparison

Parameter	TS931AILT (STMicroelectronics)	LMC7111BIM5/NOPB (Texas Instruments)	LMC7111BIM5X/NOPB (National Semiconductor)	LMV641MF/NOPB (Texas Instruments)	LMV641MFE/NOPB (Texas Instruments)
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	1	1	1	1	1
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate (V/µs)	0.05	0.03	0.03	2.6	2.6
Gain Bandwidth Product (kHz)	100	50	50	10000	10000
Current - Input Bias (pA)	1	0.1	0.1	70 nA	70 nA
Voltage - Input Offset (mV)	5	0.9	0.9	0.03	0.03
Current - Supply (µA)	20	25	25	158	158
Current - Output / Channel (mA)	5	30	30	112	112
Voltage - Supply Span (Min) (V)	2.7	2.5	2.5	2.7	2.7
Voltage - Supply Span (Max) (V)	10	11	11	12	12
Operating Temperature (°C)	-40 to 105	-40 to 85	-40 to 85	-40 to 125	-40 to 125
Package / Case	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753	SC-74A, SOT-753
Supplier Device Package	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5	SOT-23-5
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Not specified	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Last Time Buy	Active	Active	Active

Engineering Selection Recommendations

TS931AILT (Primary Part - STMicroelectronics)

The TS931AILT maintains active product status with substantial inventory availability (23,250 units). This part is recommended for new designs and ongoing production where supply continuity is prioritized. ROHS3 compliance and MSL-1 rating support standard manufacturing processes.

LMC7111BIM5/NOPB (Texas Instruments)

This substitute carries Last Time Buy status, indicating limited future availability. The LMC7111BIM5/NOPB exhibits superior input offset voltage (0.9 mV vs. 5 mV) and lower input bias current (0.1 pA vs. 1 pA), making it suitable for precision applications. However, reduced maximum operating temperature (85°C vs. 105°C) and lower gain bandwidth product (50 kHz vs. 100 kHz) must be evaluated against application requirements. ROHS3 compliance is confirmed.

LMC7111BIM5X/NOPB (National Semiconductor)

This variant maintains active product status with the highest inventory level (62,100 units). Electrical characteristics are identical to the LMC7111BIM5/NOPB. Packaging information is incomplete in available documentation. Maximum operating temperature limitation (85°C) applies.

LMV641MF/NOPB and LMV641MFE/NOPB (Texas Instruments)

Both LMV641 variants are active products with extended operating temperature range (-40°C to 125°C). These parts deliver significantly higher performance: slew rate of 2.6 V/µs (52× faster than TS931AILT), gain bandwidth product of 10 MHz (100× higher), and substantially lower input offset voltage (0.03 mV). Supply current consumption increases to 158 µA, and output current capability reaches 112 mA. These characteristics position the LMV641 series for high-speed, high-current applications. ROHS3 compliance and MSL-1 rating are confirmed for both variants. The LMV641MF/NOPB offers greater inventory (9,686 units) compared to LMV641MFE/NOPB (1,294 units).

Frequently Asked Questions (FAQ)

Q: Can the LMC7111BIM5/NOPB directly replace the TS931AILT in existing designs?

A: Physical and electrical compatibility exists for pinout and package form factor. However, the reduced maximum operating temperature (85°C vs. 105°C) and lower gain bandwidth product (50 kHz vs. 100 kHz) require verification against application specifications. The superior input offset voltage and input bias current characteristics may provide performance benefits in precision applications.

Q: What is the primary difference between LMC7111BIM5/NOPB and LMC7111BIM5X/NOPB?

A: Both parts share identical electrical specifications. The primary distinction is product status: LMC7111BIM5/NOPB is Last Time Buy, while LMC7111BIM5X/NOPB maintains active status. Packaging documentation for the X variant is incomplete in available data.

Q: Are the LMV641MF/NOPB and LMV641MFE/NOPB interchangeable?

A: Yes. Both parts are electrically and mechanically identical. The primary difference is inventory availability: LMV641MF/NOPB has 9,686 units in stock, while LMV641MFE/NOPB has 1,294 units. Selection should prioritize the higher-inventory variant for supply chain continuity.

Q: When should the LMV641 series be selected over the TS931AILT?

A: The LMV641 series is appropriate for applications requiring higher bandwidth (10 MHz vs. 100 kHz), faster slew rate (2.6 V/µs vs. 0.05 V/µs), higher output current (112 mA vs. 5 mA), or extended operating temperature range (125°C maximum vs. 105°C). Trade-offs include increased supply current consumption (158 µA vs. 20 µA).

Q: Are all substitute parts ROHS3 compliant?

A: ROHS3 compliance is confirmed for TS931AILT, LMC7111BIM5/NOPB, LMV641MF/NOPB, and LMV641MFE/NOPB. Compliance status for LMC7111BIM5X/NOPB is not specified in available documentation.

Q: What supply voltage range must be supported for substitution?

A: All substitute parts support the TS931AILT minimum supply voltage of 2.7 V. All substitutes exceed the maximum supply voltage requirement of 10 V, with LMC7111 variants supporting 11 V and LMV641 variants supporting 12 V maximum.

Q: Does MSL-1 rating apply to all substitute parts?

A: MSL-1 (Unlimited) is confirmed for TS931AILT, LMC7111BIM5/NOPB, LMV641MF/NOPB, and LMV641MFE/NOPB. MSL rating for LMC7111BIM5X/NOPB is not specified in available documentation.

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

A: LMC7111BIM5X/NOPB and both LMV641 variants maintain active product status. LMC7111BIM5/NOPB carries Last Time Buy designation, indicating limited future availability. For new designs requiring long-term supply continuity, active-status parts are recommended.

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