TS944AIPT Equivalent & Substitute Parts

Part Overview

The TS944AIPT is a general-purpose operational amplifier manufactured by STMicroelectronics, configured as a quad (4-circuit) rail-to-rail amplifier in a 14-TSSOP surface mount package. This device is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1). The TS944AIPT serves applications requiring low-power, general-purpose amplification with rail-to-rail output capability across a 2.5V to 10V supply range. Equivalent and substitute parts are identified to provide design flexibility, accommodate supply chain variations, or address specific application requirements while maintaining functional compatibility within the 14-TSSOP package footprint.

Key Parameters

Parameter	TS944AIPT
Manufacturer	STMicroelectronics
Amplifier Type	General Purpose
Number of Circuits	4
Output Type	Rail-to-Rail
Package / Case	14-TSSOP (0.173", 4.40mm Width)
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

Substitute parts for the TS944AIPT are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Mechanical Compatibility:

Package type: 14-TSSOP surface mount package with 0.173" (4.40mm) width
Mounting type: Surface mount

Electrical Compatibility:

Number of circuits: 4 (quad configuration)
Output type: Rail-to-Rail
Amplifier category: General Purpose
Supply voltage overlap: Minimum 2.5V to maximum 10V operating range

Regulatory & Environmental Compliance:

RoHS3 compliance
Moisture sensitivity level MSL 1 (unlimited)
Active product status
REACH unaffected status

Substitute parts must satisfy all mechanical compatibility requirements and operate within the specified supply voltage range. Electrical performance parameters (slew rate, gain bandwidth product, input bias current, output current) may vary between substitutes, as these represent performance enhancements or trade-offs rather than compatibility barriers. All substitute parts listed maintain the same 14-TSSOP package footprint and quad-channel configuration, ensuring direct pin-compatible replacement capability.

Parameter Comparison

Parameter	TS944AIPT	LMP7704MT/NOPB	LMP7704MTX/NOPB	LMV844MT/NOPB	LMV844MTX/NOPB	OP496HRUZ-REEL
Manufacturer	STMicroelectronics	Texas Instruments	Texas Instruments	Texas Instruments	National Semiconductor	Analog Devices Inc.
Amplifier Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	CMOS
Number of Circuits	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
Package / Case	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP
Mounting Type	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	2.7 V	3 V
Voltage - Supply Span (Max)	10 V	12 V	12 V	12 V	12 V	12 V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Slew Rate	0.0045 V/µs	1.1 V/µs	1.1 V/µs	2.5 V/µs	2.5 V/µs	0.3 V/µs
Gain Bandwidth Product	10 kHz	2.5 MHz	2.5 MHz	4.5 MHz	4.5 MHz	450 kHz
Current - Input Bias	1 pA	0.2 pA	0.2 pA	4 pA	4 pA	10 nA
Voltage - Input Offset	5 mV	37 µV	37 µV	50 µV	50 µV	35 µV
Current - Output / Channel	5 mA	86 mA	86 mA	37 mA	37 mA	4 mA
RoHS Status	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)
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and RoHS3 compliance, ensuring regulatory alignment with the TS944AIPT. The following considerations apply to part selection:

LMP7704MT/NOPB and LMP7704MTX/NOPB (Texas Instruments): These parts are functionally equivalent quad rail-to-rail amplifiers in 14-TSSOP packaging. Both are Active status with RoHS3 compliance and MSL 1 rating. The LMP7704MTX/NOPB is supplied in Tape & Reel packaging, matching the TS944AIPT packaging format. The LMP7704MT/NOPB is supplied in Tube packaging. Both support extended operating temperature range (-40°C to 125°C) compared to the TS944AIPT (-40°C to 85°C) and supply voltage range of 2.7V to 12V, which encompasses the TS944AIPT range of 2.5V to 10V.

LMV844MT/NOPB and LMV844MTX/NOPB (Texas Instruments / National Semiconductor): These parts represent the LMV® series quad rail-to-rail amplifiers in 14-TSSOP packaging. Both are Active status with RoHS3 compliance and MSL 1 rating. The LMV844MTX/NOPB carries AEC-Q100 automotive qualification. Both support extended operating temperature range (-40°C to 125°C) and supply voltage range of 2.7V to 12V, encompassing the TS944AIPT operating envelope.

OP496HRUZ-REEL (Analog Devices Inc.): This CMOS quad amplifier in 14-TSSOP packaging is Active status with RoHS3 compliance and MSL 1 rating. It is supplied in Tape & Reel format. The OP496HRUZ-REEL supports extended operating temperature range (-40°C to 125°C) and supply voltage range of 3V to 12V. The minimum supply voltage of 3V is higher than the TS944AIPT minimum of 2.5V, requiring verification for applications operating at the lower supply voltage boundary.

All substitute parts are pin-compatible within the 14-TSSOP package footprint and maintain quad-channel configuration. Selection between substitutes depends on specific application requirements regarding performance parameters (slew rate, bandwidth, output current) and supply voltage constraints.

Frequently Asked Questions (FAQ)

Q: Are all listed substitute parts pin-compatible with the TS944AIPT?

A: Yes. All substitute parts are configured as quad (4-circuit) rail-to-rail amplifiers in the 14-TSSOP surface mount package with 0.173" (4.40mm) width. The 14-pin TSSOP package footprint is identical across all parts, enabling direct PCB replacement without layout modification.

Q: What is the primary difference between the TS944AIPT and its substitutes?

A: The TS944AIPT operates across a 2.5V to 10V supply range with an operating temperature range of -40°C to 85°C. Most substitute parts extend the maximum supply voltage to 12V and the maximum operating temperature to 125°C. The OP496HRUZ-REEL has a minimum supply voltage of 3V, which is higher than the TS944AIPT minimum of 2.5V. Performance parameters such as slew rate, gain bandwidth product, and output current vary between substitutes.

Q: Can I use LMP7704MTX/NOPB as a direct replacement for TS944AIPT?

A: Yes, the LMP7704MTX/NOPB is a direct pin-compatible replacement. Both are supplied in Tape & Reel packaging and operate within overlapping supply voltage ranges (2.5V to 10V for TS944AIPT; 2.7V to 12V for LMP7704MTX/NOPB). The LMP7704MTX/NOPB offers superior performance characteristics including higher slew rate (1.1V/µs vs. 0.0045V/µs), higher gain bandwidth product (2.5 MHz vs. 10 kHz), and extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C).

Q: What is the difference between LMV844MT/NOPB and LMV844MTX/NOPB?

A: Both parts are electrically identical quad rail-to-rail amplifiers with identical performance specifications. The primary difference is packaging format: LMV844MT/NOPB is supplied in Tube packaging, while LMV844MTX/NOPB is supplied in Tape & Reel packaging. The LMV844MTX/NOPB carries AEC-Q100 automotive qualification.

Q: Is the OP496HRUZ-REEL suitable for applications requiring 2.5V supply operation?

A: No. The OP496HRUZ-REEL has a minimum supply voltage specification of 3V, which exceeds the TS944AIPT minimum of 2.5V. Applications requiring operation at 2.5V supply voltage must use the TS944AIPT or alternative substitutes with minimum supply voltage of 2.5V or lower (LMP7704 series minimum is 2.7V, which is compatible with 2.5V operation margin considerations).

Q: Do all substitute parts maintain RoHS3 compliance?

A: Yes. All substitute parts listed are RoHS3 compliant with MSL 1 (unlimited moisture sensitivity level) rating, matching the TS944AIPT compliance profile. All parts are REACH unaffected and classified under ECCN EAR99.

Q: Which substitute offers the highest output current capability?

A: The LMP7704 series (both MT and MTX variants) provides the highest output current per channel at 86 mA, compared to 5 mA for the TS944AIPT. The LMV844 series provides 37 mA per channel, and the OP496HRUZ-REEL provides 4 mA per channel.

Q: Can I substitute TS944AIPT with OP496HRUZ-REEL in a low-frequency application?

A: Substitution is possible if the application supply voltage is 3V or higher. The OP496HRUZ-REEL has a lower gain bandwidth product (450 kHz vs. 10 kHz for TS944AIPT) and lower slew rate (0.3V/µs vs. 0.0045V/µs), making it suitable for low-frequency applications. However, the higher input bias current (10 nA vs. 1 pA) may affect precision applications requiring extremely low bias current.

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