TS944IDT Equivalent & Substitute Parts

Part Overview

The TS944IDT is a general-purpose operational amplifier manufactured by STMicroelectronics, configured as a 4-circuit integrated circuit in a 14-SOIC surface mount package. This device operates as a rail-to-rail output amplifier suitable for low-power analog signal processing applications. The part is active and in production with RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent functional performance can be achieved within the specified electrical and mechanical parameters of the TS944IDT, particularly matching the 4-circuit configuration, 14-SOIC package format, and rail-to-rail output topology.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	TS944IDT	—
Manufacturer	STMicroelectronics	—
Category	Linear, Amplifiers	—
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Output Type	Rail-to-Rail	—
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Voltage - Supply Span (Min)	2.5	V
Voltage - Supply Span (Max)	10	V
Operating Temperature	-40 to 85	°C
RoHS Status	ROHS3 Compliant	—
Product Status	Active	—

Substitute Part Grouping Explanation

Substitute parts for the TS944IDT are qualified based on the following criteria:

Primary Matching Criteria:

4-circuit configuration (quad amplifier)
14-SOIC package format with 0.154" (3.90mm) width
Rail-to-rail output topology
Surface mount technology
Active product status
RoHS3 compliance

Secondary Compatibility Factors:

Supply voltage range overlap with TS944IDT (2.5V to 10V minimum requirement)
Operating temperature range coverage of -40°C to 85°C minimum
Moisture sensitivity level MSL 1 (unlimited)

Substitutes are grouped into two categories: direct functional equivalents with similar electrical performance characteristics, and alternative amplifier types (CMOS, buffer/voltage feedback) that maintain the same package and circuit count but with different performance profiles.

Parameter Comparison

Parameter	TS944IDT	LMV844MA/NOPB	LMV844MAX/NOPB	LMV844QMA/NOPB	MAX4222ESD+	OP496GSZ	OP496GSZ-REEL	OP496GSZ-REEL7
Manufacturer	STMicroelectronics	Texas Instruments	Texas Instruments	Texas Instruments	Analog Devices Inc./Maxim	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc.
Number of Circuits	4	4	4	4	4	4	4	4
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Package / Case	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)	14-SOIC (0.154", 3.90mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Voltage - Supply Span (Min)	2.5 V	2.7 V	2.7 V	2.7 V	3.15 V	3 V	3 V	3 V
Voltage - Supply Span (Max)	10 V	12 V	12 V	12 V	11 V	12 V	12 V	12 V
Operating Temperature (Min)	-40°C	-40°C	-40°C	-40°C	-40°C	-40°C	-40°C	-40°C
Operating Temperature (Max)	85°C	125°C	125°C	125°C	85°C	125°C	125°C	125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Active	Active	Active
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Substitutes (Highest Compatibility):

The LMV844 series from Texas Instruments (LMV844MA/NOPB, LMV844MAX/NOPB, LMV844QMA/NOPB) provides the closest functional equivalence to the TS944IDT. All three variants maintain the 4-circuit general-purpose amplifier configuration in 14-SOIC packaging with rail-to-rail output. These parts are active products with RoHS3 compliance and unlimited moisture sensitivity rating. The LMV844QMA/NOPB variant includes automotive-grade qualification (AEC-Q100) and is suitable for applications requiring automotive reliability standards.

Alternative Substitutes (Functional Equivalence with Different Performance):

The OP496GSZ, OP496GSZ-REEL, and OP496GSZ-REEL7 from Analog Devices Inc. are CMOS amplifiers in 4-circuit 14-SOIC configuration with rail-to-rail output. These parts are active, RoHS3 compliant, and support the full operating temperature range to 125°C. The primary distinction is the CMOS amplifier type versus general-purpose topology, with corresponding differences in slew rate and bandwidth characteristics.

The MAX4222ESD+ from Analog Devices Inc./Maxim Integrated is a buffer/voltage feedback amplifier in 4-circuit 14-SOIC format with rail-to-rail output. This part is active and RoHS3 compliant but operates within a narrower supply voltage range (3.15V to 11V minimum) compared to the TS944IDT.

Packaging Considerations:

All substitute parts are available in 14-SOIC surface mount packages with identical physical dimensions (0.154" width, 3.90mm). Packaging variants (Tube, Tape & Reel, Cut Tape & Digi-Reel) do not affect electrical compatibility but may influence procurement and assembly processes.

Compliance and Status:

All identified substitutes maintain active product status and RoHS3 compliance, ensuring long-term availability and regulatory alignment with the TS944IDT.

Frequently Asked Questions (FAQ)

Q: Can the LMV844 series parts directly replace the TS944IDT in all applications?

A: The LMV844MA/NOPB, LMV844MAX/NOPB, and LMV844QMA/NOPB maintain identical package format, circuit count, and rail-to-rail output topology. All three are active products with RoHS3 compliance. The supply voltage range of the LMV844 series (2.7V to 12V) encompasses the TS944IDT range (2.5V to 10V), and the extended operating temperature range (-40°C to 125°C) covers the TS944IDT specification (-40°C to 85°C). Substitution is valid within these electrical parameters.

Q: What is the difference between the three LMV844 variants?

A: LMV844MA/NOPB is packaged in Tube format. LMV844MAX/NOPB is packaged in Tape & Reel (TR) format. LMV844QMA/NOPB is packaged in Tube format and includes automotive-grade qualification (AEC-Q100). All three share identical electrical specifications and 14-SOIC package dimensions.

Q: Are the OP496GSZ variants suitable substitutes for the TS944IDT?

A: The OP496GSZ, OP496GSZ-REEL, and OP496GSZ-REEL7 are CMOS amplifiers in 4-circuit 14-SOIC configuration with rail-to-rail output. These parts are active, RoHS3 compliant, and support the operating temperature range to 125°C. The primary difference is the amplifier type (CMOS versus general-purpose), which results in different electrical performance characteristics. Substitution is valid when CMOS amplifier performance is acceptable for the application.

Q: What are the packaging differences among the OP496 variants?

A: OP496GSZ is supplied in Tube packaging. OP496GSZ-REEL and OP496GSZ-REEL7 are both supplied in Cut Tape (CT) & Digi-Reel format. All three variants share identical electrical specifications and 14-SOIC package dimensions. The packaging designation does not affect electrical compatibility.

Q: Is the MAX4222ESD+ a suitable substitute for the TS944IDT?

A: The MAX4222ESD+ is a buffer/voltage feedback amplifier in 4-circuit 14-SOIC configuration with rail-to-rail output. It is active and RoHS3 compliant. However, the supply voltage range (3.15V to 11V minimum) is narrower than the TS944IDT (2.5V to 10V minimum). Substitution is valid only when the application supply voltage remains within the MAX4222ESD+ specification range.

Q: Do all substitute parts have the same moisture sensitivity level as the TS944IDT?

A: Yes. All identified substitute parts have Moisture Sensitivity Level (MSL) 1 (Unlimited), matching the TS944IDT specification. This ensures equivalent handling and storage requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitute parts are RoHS3 compliant, matching the TS944IDT compliance status. All parts are also REACH Unaffected and classified as EAR99 for export control purposes.

Q: Can I use substitute parts interchangeably in existing designs?

A: Substitution validity depends on the specific electrical requirements of the application. All substitute parts maintain the 4-circuit configuration, 14-SOIC package format, and rail-to-rail output topology. However, differences in slew rate, gain bandwidth product, input bias current, and output current per channel may affect circuit performance. Verify that the substitute part's electrical specifications satisfy the application requirements before implementation.

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