TS27L4AMD CMOS Amplifier Equivalent & Substitute Parts

Part Overview

The TS27L4AMD is a CMOS amplifier integrated circuit manufactured by STMicroelectronics, configured as a 4-circuit operational amplifier in a 14-SOIC surface mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support, production continuity, and system maintenance. The TS27L4AMD operates across a wide supply voltage range of 3V to 16V with a slew rate of 0.04V/µs and gain bandwidth product of 100 kHz, suitable for low-speed analog signal processing applications requiring low input bias current and minimal input offset voltage.

Key Parameters

Parameter	Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	4	—
Slew Rate	0.04	V/µs
Gain Bandwidth Product	100	kHz
Current - Input Bias	1	pA
Voltage - Input Offset	5	mV
Current - Output / Channel	45	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	16	V
Mounting Type	Surface Mount	—
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	3 (168 Hours)	—

Substitute Part Grouping Explanation

Substitution of the TS27L4AMD is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

Amplifier Type: CMOS
Number of Circuits: 4
Package / Case: 14-SOIC form factor (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Voltage - Supply Span: Minimum 3V to Maximum 16V compatibility
Current - Input Bias: 1 pA
Current - Output / Channel: Minimum 30 mA

Secondary Compatibility Factors:

Slew Rate: 0.04V/µs or greater
Gain Bandwidth Product: 100 kHz or greater
Voltage - Input Offset: Within acceptable tolerance for application
RoHS and REACH compliance status

Substitute parts are grouped into two categories based on amplifier classification: CMOS amplifiers (NJU7004M#, TLC1079 series) and General Purpose amplifiers (TLC274 series). CMOS amplifiers maintain the original low-power input bias characteristics. General Purpose amplifiers offer enhanced slew rate and bandwidth but operate at higher supply current levels.

Parameter Comparison

Parameter	TS27L4AMD	NJU7004M#	TLC1079CD	TLC1079CDR	TLC1079ID	TLC1079IDR	TLC274ACD	TLC274ACDR	TLC274AIDR	TLC274BCD	TLC274BCDR
Amplifier Type	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	4	4	4	4	4	4	4	4	4	4	4
Slew Rate (V/µs)	0.04	0.05	0.032	0.032	0.032	0.032	3.6	3.6	3.6	3.6	3.6
Gain Bandwidth Product (kHz)	100	100	110	110	110	110	2200	2200	2200	2200	2200
Current - Input Bias (pA)	1	1	1	1	1	1	0.6	0.6	0.6	0.6	0.6
Voltage - Input Offset (mV)	5	10	0.18	0.18	0.18	0.18	0.9	0.9	0.9	0.34	0.34
Current - Output / Channel (mA)	45	—	30	30	30	30	30	30	30	30	30
Voltage - Supply Span (Min)	3 V	1 V	1.4 V	1.4 V	3 V	3 V	3 V	3 V	4 V	3 V	3 V
Voltage - Supply Span (Max)	16 V	16 V	16 V	16 V	16 V	16 V	16 V	16 V	16 V	16 V	16 V
Operating Temperature	—	-20°C ~ 75°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C
Package / Case	14-SOIC (0.154", 3.90mm)	14-SOIC (0.197", 5.00mm)	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)	14-SOIC (0.154", 3.90mm)
Product Status	Obsolete	Active	Active	Last Time Buy	Last Time Buy	Active	Obsolete	Active	Active	Obsolete	Active
RoHS Status	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct CMOS Substitutes (Recommended for Pin-Compatible Replacement):

The TLC1079 series (TLC1079CD, TLC1079CDR, TLC1079ID, TLC1079IDR) from Texas Instruments provides the closest functional equivalence to the TS27L4AMD. These devices maintain CMOS amplifier architecture with 4 circuits in 14-SOIC packaging. The TLC1079IDR variant is recommended as the primary substitute due to its Active product status, extended operating temperature range (-40°C to 85°C), and highest inventory availability (7166 units). The TLC1079IDR operates within the required 3V to 16V supply range and maintains the 1 pA input bias current specification. The slew rate of 0.032V/µs is marginally lower than the TS27L4AMD, but the gain bandwidth product of 110 kHz exceeds the original specification.

The NJU7004M# from Nisshinbo Micro Devices provides an alternative CMOS solution with Active product status. This device offers superior slew rate performance (0.05V/µs) and operates across an extended minimum supply voltage of 1V. However, the NJU7004M# package width is 0.197" (5.00mm) compared to the TS27L4AMD's 0.154" (3.90mm), requiring PCB layout verification for mechanical compatibility.

General Purpose Amplifier Substitutes (Enhanced Performance Alternative):

The TLC274 series (TLC274ACDR, TLC274AIDR, TLC274BCDR) offers significantly enhanced performance characteristics with slew rates of 3.6V/µs and gain bandwidth products of 2.2 MHz. These devices are suitable for applications requiring higher-speed signal processing. The TLC274ACDR and TLC274BCDR are Active products with high inventory availability (16291 and 20200 units respectively). The TLC274AIDR variant supports extended operating temperature range (-40°C to 85°C) with Active status. All TLC274 variants maintain the 14-SOIC (0.154", 3.90mm) package form factor and 3V to 16V supply compatibility. Selection of TLC274 variants requires confirmation that the application can accommodate increased supply current consumption (2.7mA per channel versus the TS27L4AMD's unspecified supply current).

Compliance and Availability Considerations:

All substitute parts maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory alignment with the original TS27L4AMD. The TLC1079IDR offers the optimal balance of product status (Active), inventory depth (7166 units), and functional compatibility for direct replacement applications. For new designs or applications requiring enhanced bandwidth performance, the TLC274ACDR or TLC274BCDR provide superior specifications with established supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can the NJU7004M# be used as a direct replacement for the TS27L4AMD?

A: The NJU7004M# is functionally compatible as a CMOS 4-circuit amplifier with matching supply voltage range and input bias current. However, the package width differs (0.197" versus 0.154"), requiring verification that the printed circuit board layout accommodates the wider 14-DMP package. Electrical performance is compatible, with improved slew rate (0.05V/µs versus 0.04V/µs).

Q: What is the primary difference between CMOS and General Purpose amplifier substitutes?

A: CMOS amplifiers (TLC1079 series, NJU7004M#) maintain the original low input bias current (1 pA) and low slew rate characteristics of the TS27L4AMD, suitable for precision low-speed applications. General Purpose amplifiers (TLC274 series) provide significantly higher slew rates (3.6V/µs) and bandwidth (2.2 MHz) but operate at higher supply current levels (2.7mA per channel). Selection depends on application bandwidth requirements and power budget constraints.

Q: Is the TLC1079IDR suitable for extended temperature range applications?

A: Yes. The TLC1079IDR operates across -40°C to 85°C, providing extended temperature coverage compared to the TS27L4AMD (operating temperature not specified). This variant is classified as Active with the highest inventory availability among TLC1079 options, making it suitable for industrial and automotive temperature range requirements.

Q: Does package form factor compatibility affect substitution?

A: Yes. The TS27L4AMD uses a 14-SOIC package with 0.154" (3.90mm) width. Most substitute parts (TLC1079 series, TLC274 series) maintain this identical package width, ensuring direct PCB compatibility. The NJU7004M# uses a 14-DMP package with 0.197" (5.00mm) width, requiring PCB layout verification before implementation.

Q: Which substitute part offers the best inventory availability?

A: The TLC1079IDR provides the highest inventory availability at 7166 units in stock. The TLC274BCDR offers 20200 units, and the TLC274ACDR offers 16291 units. For immediate procurement, the TLC274 series variants provide superior supply depth, while the TLC1079IDR balances availability with functional equivalence to the original TS27L4AMD.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts maintain either ROHS3 Compliance or RoHS Compliance status, ensuring regulatory alignment with the original TS27L4AMD. All parts are classified as REACH Unaffected, confirming compliance with European chemical substance regulations.

Q: What is the minimum supply voltage requirement for each substitute?

A: The TS27L4AMD requires a minimum of 3V. The TLC1079CD and TLC1079CDR operate at 1.4V minimum, providing enhanced low-voltage capability. The TLC1079ID and TLC1079IDR require 3V minimum, matching the original specification. The TLC274 series variants require 3V to 4V minimum depending on grade. All devices support the 16V maximum supply voltage.

Q: Can the TLC274 series be used in applications designed for the TS27L4AMD?

A: The TLC274 series is electrically compatible within the 3V to 16V supply range and maintains the 4-circuit 14-SOIC package form factor. However, the significantly higher slew rate (3.6V/µs versus 0.04V/µs) and bandwidth (2.2 MHz versus 100 kHz) may introduce stability or noise considerations in applications designed for the lower-speed TS27L4AMD. Circuit simulation or prototype testing is necessary to confirm suitability for specific applications.

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