TS27M4AIPT Equivalent & Substitute Parts

Part Overview

The TS27M4AIPT is a CMOS amplifier integrated circuit manufactured by STMicroelectronics, configured as a 4-circuit operational amplifier in a 14-TSSOP surface mount package. This device is classified as obsolete, indicating discontinuation from active production. The TS27M4AIPT operates across a supply voltage range of 3V to 16V with an operating temperature range of -40°C to 125°C, making it suitable for industrial and extended-temperature applications. Due to its obsolete status, equivalent and substitute parts are necessary for ongoing design support, production continuity, and component sourcing.

Key Parameters

Parameter	Value
Manufacturer Part Number	TS27M4AIPT
Manufacturer	STMicroelectronics
Amplifier Type	CMOS
Number of Circuits	4
Package / Case	14-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Slew Rate	0.6 V/µs
Gain Bandwidth Product	1 MHz
Current - Input Bias	1 pA
Voltage - Input Offset	900 µV
Current - Supply	150 µA (x4 Channels)
Current - Output / Channel	45 mA
Voltage - Supply Span (Min)	3 V
Voltage - Supply Span (Max)	16 V
Operating Temperature	-40°C ~ 125°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the TS27M4AIPT is determined by strict alignment of electrical and mechanical parameters. The critical parameters governing substitution are:

Package Compatibility: The TS27M4AIPT uses a 14-TSSOP package (0.173", 4.40mm width). Substitute parts must use identical or mechanically compatible packages to ensure PCB layout compatibility and assembly feasibility.

Circuit Configuration: The device contains 4 operational amplifier circuits. Substitute parts must maintain this 4-circuit configuration.

Amplifier Type: The TS27M4AIPT is a CMOS amplifier. Substitutes may include CMOS or general-purpose amplifier types, provided electrical parameters remain within acceptable ranges for the application.

Supply Voltage Range: The device operates from 3V to 16V. Substitute parts must support at minimum the 3V to 16V range, or a range that encompasses the application's supply voltage requirements.

Operating Temperature Range: The TS27M4AIPT operates from -40°C to 125°C. Substitute parts must support temperature ranges that cover the application's operating environment.

Electrical Performance Parameters: Key electrical specifications including slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, and output current per channel determine functional equivalence. Substitute parts with comparable or superior electrical performance are acceptable.

Compliance and Certifications: RoHS3 compliance and MSL rating must be maintained for regulatory and manufacturing requirements.

Parameter Comparison

Parameter	TS27M4AIPT	LM2902QPWRQ1	TLC274CDB	TLC274CDBR	TLC274CPW	TLC274CPWR	TLC274IPW	TLC274IPWR	TLC27L4CPW	TLC27L4CPWR	TLC27L4IPWR
Manufacturer	STMicroelectronics	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Amplifier Type	CMOS	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	CMOS	CMOS	CMOS
Number of Circuits	4	4	4	4	4	4	4	4	4	4	4
Package / Case	14-TSSOP	14-TSSOP	14-SSOP	14-SSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP	14-TSSOP
Slew Rate (V/µs)	0.6	0.5	3.6	3.6	3.6	3.6	3.6	3.6	0.05	0.05	0.05
Gain Bandwidth Product (MHz)	1	1.2	2.2	2.2	2.2	2.2	2.2	2.2	0.11	0.11	0.11
Current - Input Bias (pA)	1	20000	0.6	0.6	0.6	0.6	0.6	0.6	0.7	0.7	0.7
Voltage - Input Offset (mV)	0.9	3	1.1	1.1	1.1	1.1	1.1	1.1	1.1	1.1	1.1
Current - Supply (µA, x4 Channels)	150	1400	2700	2700	2700	2700	2700	2700	57	57	57
Current - Output / Channel (mA)	45	60	30	30	30	30	30	30	30	30	30
Voltage - Supply Span Min (V)	3	3	3	3	3	3	4	4	3	3	4
Voltage - Supply Span Max (V)	16	26	16	16	16	16	16	16	16	16	16
Operating Temperature (°C)	-40 ~ 125	-40 ~ 125	0 ~ 70	0 ~ 70	0 ~ 70	0 ~ 70	-40 ~ 85	-40 ~ 85	0 ~ 70	0 ~ 70	-40 ~ 85
Product Status	Obsolete	Active	Last Time Buy	Last Time Buy	Obsolete	Active	Obsolete	Active	Last Time Buy	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Package-Compatible Substitutes (14-TSSOP):

The following parts maintain identical 14-TSSOP packaging and are directly compatible at the PCB level:

LM2902QPWRQ1 (Texas Instruments, Active Status): This general-purpose amplifier offers active product status with automotive-grade qualification (AEC-Q100). It provides superior supply voltage range (3V to 26V) and extended temperature coverage (-40°C to 125°C) matching the TS27M4AIPT. The higher input bias current (20 nA versus 1 pA) and increased supply current (1.4 mA versus 150 µA) are trade-offs for active availability and automotive qualification.

TLC274CPWR (Texas Instruments, Active Status): This general-purpose amplifier in 14-TSSOP packaging maintains active product status. It provides higher slew rate (3.6 V/µs) and gain bandwidth product (2.2 MHz) compared to the TS27M4AIPT. Operating temperature range is limited to 0°C to 70°C, which does not cover the full -40°C to 125°C range of the original part.

TLC274IPWR (Texas Instruments, Active Status): Similar to TLC274CPWR with active status and 14-TSSOP packaging. Operating temperature range extends to -40°C to 85°C, providing better low-temperature coverage than TLC274CPWR but not reaching the 125°C upper limit of the TS27M4AIPT.

TLC27L4CPWR (Texas Instruments, Active Status): This CMOS amplifier maintains the same amplifier type as the TS27M4AIPT. It offers active product status with 14-TSSOP packaging. The extremely low slew rate (0.05 V/µs) and reduced gain bandwidth product (110 kHz) indicate this part is optimized for low-power applications. Operating temperature range is 0°C to 70°C.

TLC27L4IPWR (Texas Instruments, Active Status): This CMOS amplifier provides the closest electrical match to the TS27M4AIPT in terms of amplifier type and low-power characteristics. It offers active product status with 14-TSSOP packaging and extended operating temperature range (-40°C to 85°C). Supply current is significantly lower (57 µA versus 150 µA), making it suitable for power-constrained applications.

Package-Variant Substitutes (14-SSOP):

TLC274CDB and TLC274CDBR (Texas Instruments, Last Time Buy Status): These parts use 14-SSOP packaging (0.209", 5.30mm width), which differs from the 14-TSSOP package. PCB layout modifications are required for substitution. Both parts are in Last Time Buy status, indicating limited future availability.

Selection Criteria by Application Requirements:

For applications requiring extended temperature operation (-40°C to 125°C), LM2902QPWRQ1 is the only substitute maintaining full temperature coverage with active product status.

For applications where low power consumption is critical, TLC27L4IPWR provides the lowest supply current (57 µA) while maintaining CMOS amplifier characteristics and active status.

For applications requiring higher bandwidth performance, TLC274CPWR or TLC274IPWR offer superior slew rate and gain bandwidth product, with TLC274IPWR providing better temperature coverage.

All recommended substitutes maintain ROHS3 compliance and MSL rating of 1 (Unlimited), ensuring regulatory and manufacturing compatibility.

Frequently Asked Questions (FAQ)

Q: Can the TS27M4AIPT be directly replaced with any of the listed substitutes without PCB modifications?

A: Direct replacement without PCB modifications is possible only with substitutes using identical 14-TSSOP packaging: LM2902QPWRQ1, TLC274CPW, TLC274CPWR, TLC274IPW, TLC274IPWR, TLC27L4CPW, TLC27L4CPWR, and TLC27L4IPWR. Substitutes using 14-SSOP packaging (TLC274CDB, TLC274CDBR) require PCB layout modifications due to different package dimensions.

Q: What is the primary difference between CMOS and general-purpose amplifier types in these substitutes?

A: CMOS amplifiers (TS27M4AIPT, TLC27L4 series) are characterized by extremely low input bias current and reduced supply current, making them suitable for low-power and high-impedance applications. General-purpose amplifiers (LM2902, TLC274 series) typically offer higher bandwidth and output current capability but consume more power. Selection depends on application requirements for power consumption versus bandwidth performance.

Q: Why does the LM2902QPWRQ1 have significantly higher input bias current than the TS27M4AIPT?

A: The LM2902QPWRQ1 input bias current of 20 nanoamperes (20,000 pA) versus 1 picoampere for the TS27M4AIPT reflects different semiconductor process technologies. The LM2902QPWRQ1 is optimized for automotive applications with AEC-Q100 qualification, which involves different design trade-offs. This higher bias current is acceptable in most applications but may affect high-impedance signal conditioning circuits.

Q: Which substitute offers the best match for extended temperature applications?

A: The LM2902QPWRQ1 is the only substitute maintaining the full -40°C to 125°C operating temperature range of the TS27M4AIPT. It also provides active product status and automotive-grade qualification. For applications requiring temperatures above 85°C, this is the recommended choice.

Q: What is the significance of "Last Time Buy" status for TLC274CDB and TLC274CDBR?

A: Last Time Buy status indicates that these parts are in the final phase of production before discontinuation. While currently available, future availability is limited. These parts should be considered only for legacy system support or when specific performance characteristics are required that are not available in active-status alternatives.

Q: Are all substitutes RoHS3 compliant?

A: Yes, all listed substitutes maintain ROHS3 compliance, matching the TS27M4AIPT. This ensures compatibility with regulatory requirements and modern manufacturing processes.

Q: How does supply current consumption differ between substitutes, and why is this important?

A: Supply current varies significantly: TS27M4AIPT at 150 µA, TLC27L4 series at 57 µA, LM2902QPWRQ1 at 1.4 mA, and TLC274 series at 2.7 mA (all per 4 channels). Lower supply current is critical for battery-powered or energy-harvesting applications. Higher supply current may indicate better performance characteristics such as higher bandwidth or output current capability. Application power budget determines the acceptable range.

Q: What packaging considerations should be evaluated when selecting a substitute?

A: The TS27M4AIPT uses 14-TSSOP packaging (0.173" width). All recommended substitutes except TLC274CDB and TLC274CDBR use identical 14-TSSOP packaging, ensuring direct PCB compatibility. TLC274CDB and TLC274CDBR use 14-SSOP packaging (0.209" width), requiring PCB redesign. Verify PCB footprint compatibility before finalizing component selection.

Q: Can the TLC27L4 series be used as a direct replacement for bandwidth-critical applications?

A: No. The TLC27L4 series has significantly lower bandwidth (110 kHz gain bandwidth product) compared to the TS27M4AIPT (1 MHz). These parts are optimized for low-power, low-frequency applications. For bandwidth-critical applications, TLC274 series or LM2902QPWRQ1 are more appropriate.

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