TS941AILT Equivalent & Substitute Parts

Part Overview

The TS941AILT is a general-purpose operational amplifier manufactured by STMicroelectronics, housed in a SOT-23-5 surface mount package. This rail-to-rail output amplifier operates across a 2.5 V to 10 V supply range and is designed for low-power applications requiring minimal input bias current. The part is currently in active product status with substantial inventory availability.

Substitute parts become necessary when the TS941AILT reaches end-of-life status, when supply constraints occur, or when application requirements demand enhanced performance characteristics such as higher slew rate, increased gain bandwidth product, or extended operating temperature ranges. The substitute parts listed maintain mechanical and electrical compatibility while offering alternative performance profiles and manufacturer options.

Key Parameters

Parameter	TS941AILT
Manufacturer	STMicroelectronics
Category	Linear, Amplifiers
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)	2.5 V
Voltage - Supply Span (Max)	10 V
Operating Temperature	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitution compatibility for the TS941AILT is determined by the following critical parameters:

Mechanical Compatibility:

Package type: SOT-23-5 (SC-74A, SOT-753)
Mounting type: Surface Mount
Pin count and pinout: 5-pin configuration

Electrical Compatibility:

Amplifier type: General Purpose
Number of circuits: 1
Output type: Rail-to-Rail
Supply voltage range overlap: Minimum 2.5 V to 10 V envelope
Operating temperature range: Minimum -40°C to 85°C coverage

Compliance Requirements:

RoHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)
REACH Unaffected status

All substitute parts listed maintain identical mechanical packaging and meet or exceed the electrical operating envelope of the TS941AILT. Substitutes are grouped by performance tier based on slew rate and gain bandwidth product characteristics.

Parameter Comparison

Parameter	TS941AILT	TLV2731IDBVR	TLV2731IDBVT	TLV2731CDBVR	TLV2731CDBVT	LMV641MF/NOPB	LMV641MFE/NOPB
Manufacturer	STMicroelectronics	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	1	1	1	1	1	1	1
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Package / Case	SC-74A, SOT-753	SC-74A, SOT-753	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	SOT-23-5	SOT-23-5
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Slew Rate	0.0045 V/µs	1.6 V/µs	1.6 V/µs	1.6 V/µs	1.6 V/µs	2.6 V/µs	2.6 V/µs
Gain Bandwidth Product	10 kHz	2 MHz	2 MHz	2 MHz	2 MHz	10 MHz	10 MHz
Current - Input Bias	1 pA	1 pA	1 pA	1 pA	1 pA	70 nA	70 nA
Voltage - Input Offset	5 mV	700 µV	700 µV	700 µV	700 µV	30 µV	30 µV
Current - Supply	1.2 µA	850 µA	850 µA	850 µA	850 µA	158 µA	158 µA
Current - Output / Channel	5 mA	50 mA	50 mA	50 mA	50 mA	112 mA	112 mA
Voltage - Supply Span (Min)	2.5 V	2.7 V	2.7 V	2.7 V	2.7 V	2.7 V	2.7 V
Voltage - Supply Span (Max)	10 V	10 V	10 V	10 V	10 V	12 V	12 V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 125°C	-40°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Last Time Buy	Last Time Buy	Last Time Buy	Active	Active

Engineering Selection Recommendations

Direct Substitutes (Active Product Status):

TLV2731IDBVR and LMV641MF/NOPB are the primary substitutes with active product status. TLV2731IDBVR maintains identical operating temperature range (-40°C to 85°C) and supply voltage envelope (2.7 V to 10 V) as the TS941AILT, offering improved slew rate (1.6 V/µs) and gain bandwidth product (2 MHz). LMV641MF/NOPB extends the operating temperature range to -40°C to 125°C and supply voltage to 12 V maximum, with superior performance metrics (2.6 V/µs slew rate, 10 MHz gain bandwidth product).

Last Time Buy Alternatives:

TLV2731CDBVR, TLV2731CDBVT, and TLV2731IDBVT carry Last Time Buy status. TLV2731CDBVR and TLV2731CDBVT operate within a reduced temperature range (0°C to 70°C), which restricts their use in applications requiring the full -40°C to 85°C envelope. TLV2731IDBVT maintains the full temperature range but with Last Time Buy status, indicating limited future availability.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and REACH Unaffected status, ensuring regulatory alignment with the TS941AILT across all markets and applications.

Supply Voltage Considerations:

The TS941AILT operates from 2.5 V minimum; all Texas Instruments substitutes require 2.7 V minimum. Applications operating below 2.7 V require the TS941AILT or equivalent STMicroelectronics parts. LMV641MF/NOPB and LMV641MFE/NOPB support supply voltages up to 12 V, providing additional headroom for higher-voltage applications.

Frequently Asked Questions (FAQ)

Q: Can TLV2731CDBVR be used as a direct replacement for TS941AILT in all applications?

A: TLV2731CDBVR is mechanically and electrically compatible but operates within a reduced temperature range (0°C to 70°C) compared to TS941AILT (-40°C to 85°C). Use TLV2731CDBVR only in applications where the operating temperature remains within 0°C to 70°C. For full temperature range coverage, use TLV2731IDBVR instead.

Q: What is the difference between LMV641MF/NOPB and LMV641MFE/NOPB?

A: Both parts are electrically and mechanically identical. The difference lies in packaging designation and inventory levels. LMV641MF/NOPB has higher inventory availability (9686 units) compared to LMV641MFE/NOPB (1294 units). Both support identical electrical specifications and operating ranges.

Q: Why does TS941AILT have a lower slew rate (0.0045 V/µs) compared to substitute parts?

A: The TS941AILT is optimized for ultra-low power consumption (1.2 µA supply current) and minimal input bias current (1 pA), which inherently results in lower slew rate performance. Substitute parts trade increased power consumption for higher slew rate and gain bandwidth product. Select based on application requirements for speed versus power efficiency.

Q: Can I use LMV641MF/NOPB in a circuit designed for TS941AILT operating at 2.5 V supply?

A: No. LMV641MF/NOPB requires a minimum supply voltage of 2.7 V. The TS941AILT operates from 2.5 V minimum. For applications requiring 2.5 V operation, use TS941AILT or equivalent STMicroelectronics parts. Do not substitute with LMV641MF/NOPB or LMV641MFE/NOPB in 2.5 V systems.

Q: Are all substitute parts available in the same packaging?

A: Yes. All substitute parts use SOT-23-5 packaging (SC-74A, SOT-753 case designation) with identical pin configuration and surface mount mounting type. No PCB layout modifications are required for mechanical substitution.

Q: What is the significance of "Last Time Buy" status for TLV2731 variants?

A: Last Time Buy status indicates that Texas Instruments will discontinue these parts after a specified date. TLV2731CDBVR, TLV2731CDBVT, and TLV2731IDBVT should not be selected for new designs. Use TLV2731IDBVR (Active status) or LMV641MF/NOPB (Active status) for long-term product availability.

Q: How do input offset voltage specifications affect circuit performance?

A: TS941AILT has 5 mV input offset voltage; TLV2731 variants have 700 µV; LMV641 variants have 30 µV. Lower offset voltage reduces DC errors in precision applications. For general-purpose amplification, all values are acceptable. For precision instrumentation or low-level signal conditioning, LMV641MF/NOPB or LMV641MFE/NOPB are preferred.

Q: Can substitute parts handle higher output current than TS941AILT?

A: Yes. TS941AILT provides 5 mA output current per channel. TLV2731 variants provide 50 mA; LMV641 variants provide 112 mA. If the application requires output current exceeding 5 mA, use LMV641MF/NOPB or LMV641MFE/NOPB. Verify that the load impedance and thermal design accommodate the increased current capability.

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