TS27L4ACN CMOS Amplifier Equivalent & Substitute Parts

Part Overview

The TS27L4ACN is a CMOS amplifier integrated circuit manufactured by STMicroelectronics, configured as a 4-circuit operational amplifier in a 14-DIP through-hole package. This device is classified as obsolete, with 3,100 units currently in stock. The TS27L4ACN operates across a supply voltage range of 3V to 16V and is suitable for low-power CMOS amplifier applications requiring minimal input bias current and moderate bandwidth characteristics.

Due to its obsolete product status, identifying equivalent and substitute parts is essential for design continuity, long-term component availability, and system reliability. Substitute parts must maintain compatibility across critical electrical parameters including supply voltage range, number of circuits, package configuration, and thermal operating range.

Key Parameters

Parameter	TS27L4ACN Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	4	—
Package / Case	14-DIP (0.300", 7.62mm)	—
Mounting Type	Through Hole	—
Slew Rate	0.04	V/µs
Gain Bandwidth Product	100	kHz
Current - Input Bias	1	pA
Voltage - Input Offset	900	µV
Current - Supply	10	µA (x4 Channels)
Current - Output / Channel	45	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	16	V
Operating Temperature	0°C ~ 70°C	—
RoHS Status	ROHS3 Compliant	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitute parts for the TS27L4ACN are evaluated based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

Amplifier Type: CMOS configuration
Number of Circuits: 4 independent amplifier circuits
Package / Case: 14-DIP (0.300", 7.62mm) through-hole mounting
Voltage - Supply Span: Minimum 3V to Maximum 16V overlap
Current - Input Bias: 1 pA (ultra-low bias current requirement)

Secondary Compatibility Criteria:

Slew Rate: 0.04V/µs or higher
Gain Bandwidth Product: 100 kHz or higher
Current - Output / Channel: 30 mA or higher
Operating Temperature Range: Includes 0°C to 70°C minimum

Substitute parts are grouped into two categories based on their electrical performance characteristics:

Category 1: Low-Bandwidth CMOS Amplifiers (100–110 kHz) These parts maintain the original TS27L4ACN bandwidth specification and are direct functional equivalents. Parts include NJU7004D# and TLC1079CN/TLC1079IN.

Category 2: High-Performance General Purpose and CMOS Amplifiers (2.2 MHz) These parts exceed the original bandwidth specification and offer enhanced slew rate performance. Parts include NJU7024D#, TLC274 series (ACN, AIN, BCN, BIN, CN), and TLC279CN. These are suitable for applications requiring higher bandwidth while maintaining 4-circuit configuration and 14-DIP packaging.

Parameter Comparison

Parameter	TS27L4ACN	NJU7004D#	NJU7024D#	TLC1079CN	TLC1079IN	TLC274ACN	TLC274AIN	TLC274BCN	TLC274BIN	TLC274CN	TLC279CN
Amplifier Type	CMOS	CMOS	CMOS	CMOS	CMOS	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	CMOS
Number of Circuits	4	4	4	4	4	4	4	4	4	4	4
Package / Case	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Slew Rate (V/µs)	0.04	0.05	0.4	0.032	0.032	3.6	3.6	3.6	3.6	3.6	3.6
Gain Bandwidth Product (kHz)	100	100	400	110	110	2200	2200	2200	2200	2200	2200
Current - Input Bias (pA)	1	1	1	1	1	0.6	0.6	0.6	0.6	0.6	0.6
Voltage - Input Offset (µV)	900	10000	10000	180	180	900	900	340	340	1100	320
Current - Supply (µA)	10	15	150	29	29	2700	2700	2700	2700	2700	2700
Current - Output / Channel (mA)	45	—	—	30	30	30	30	30	30	30	30
Voltage - Supply Span Min (V)	3	1	3	1.4	3	3	4	3	4	3	3
Voltage - Supply Span Max (V)	16	16	16	16	16	16	16	16	16	16	16
Operating Temperature (°C)	0 ~ 70	-20 ~ 75	-20 ~ 75	0 ~ 70	-40 ~ 85	0 ~ 70	-40 ~ 85	0 ~ 70	-40 ~ 85	0 ~ 70	0 ~ 70
Product Status	Obsolete	Active	Active	Last Time Buy	Last Time Buy	Last Time Buy	Last Time Buy	Last Time Buy	Last Time Buy	Last Time Buy	Last Time Buy
RoHS Status	ROHS3 Compliant	RoHS Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Functional Replacement (Bandwidth-Matched Applications):

NJU7004D# and TLC1079CN/TLC1079IN are the closest functional equivalents to the TS27L4ACN, maintaining the 100–110 kHz gain bandwidth product specification. NJU7004D# is classified as Active, ensuring long-term availability. TLC1079CN and TLC1079IN are classified as Last Time Buy, indicating limited future availability. Both NJU7004D# and TLC1079 series maintain CMOS amplifier architecture with 4 circuits in 14-DIP packaging and are ROHS3 compliant.

NJU7004D# operates across 1V to 16V supply range, providing broader voltage compatibility than the TS27L4ACN minimum of 3V. TLC1079CN operates from 1.4V minimum, while TLC1079IN requires 3V minimum. All three parts maintain 1 pA input bias current specification.

For Enhanced Performance Applications:

NJU7024D#, TLC274 series (ACN, AIN, BCN, BIN, CN), and TLC279CN offer significantly higher bandwidth (400 kHz to 2.2 MHz) and slew rate (0.4V/µs to 3.6V/µs) compared to the TS27L4ACN. These parts are suitable for applications where the original 100 kHz bandwidth is insufficient. NJU7024D# is Active status. TLC274 and TLC279 series are Last Time Buy status.

All substitute parts maintain 4-circuit configuration, 14-DIP through-hole packaging, and 16V maximum supply voltage. All are ROHS3 compliant or RoHS compliant, meeting environmental regulatory requirements.

Compliance and Certification Alignment:

All substitute parts listed maintain RoHS compliance status (ROHS3 Compliant or RoHS Compliant), REACH Unaffected status, and EAR99 ECCN classification, matching the regulatory profile of the TS27L4ACN. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts, indicating no moisture sensitivity constraints during storage and handling.

Frequently Asked Questions (FAQ)

Q: Can NJU7004D# directly replace TS27L4ACN in existing designs?

A: NJU7004D# is a direct functional equivalent for bandwidth-matched applications. Both devices are 4-circuit CMOS amplifiers in 14-DIP packages with 100 kHz gain bandwidth product and 1 pA input bias current. NJU7004D# operates across a wider supply voltage range (1V to 16V) compared to TS27L4ACN (3V to 16V), making it compatible with designs using 3V to 16V supplies. Pin configuration and package dimensions are identical.

Q: What is the difference between TLC1079CN and TLC1079IN?

A: Both TLC1079CN and TLC1079IN are CMOS amplifiers with identical electrical specifications (0.032V/µs slew rate, 110 kHz bandwidth, 1 pA input bias). The primary difference is operating temperature range: TLC1079CN operates 0°C to 70°C, while TLC1079IN operates -40°C to 85°C. TLC1079IN is suitable for extended temperature applications. Both are Last Time Buy status.

Q: Why do TLC274 and TLC279 series have higher supply current than TS27L4ACN?

A: TLC274 and TLC279 series are general purpose and high-performance CMOS amplifiers with 2.2 MHz gain bandwidth product, compared to TS27L4ACN at 100 kHz. Higher bandwidth performance requires increased quiescent current: TLC274/TLC279 series draw 2.7 mA per 4 channels versus TS27L4ACN at 10 µA per 4 channels. This trade-off between bandwidth and power consumption is inherent to amplifier design.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are either ROHS3 Compliant or RoHS Compliant, meeting environmental regulatory requirements. The TS27L4ACN is ROHS3 Compliant. NJU7004D# and NJU7024D# are RoHS Compliant. TLC1079 and TLC274/TLC279 series are ROHS3 Compliant. All parts are REACH Unaffected.

Q: Can I use TLC274 series in place of TS27L4ACN for low-power applications?

A: TLC274 series is not recommended for power-constrained applications. TLC274 series draws 2.7 mA per 4 channels compared to TS27L4ACN at 10 µA per 4 channels, representing a 270-fold increase in supply current. Use TLC274 series only when the higher bandwidth (2.2 MHz) and slew rate (3.6V/µs) performance justify the increased power consumption.

Q: What is the inventory status of substitute parts?

A: NJU7004D# has 904 units in stock (Active status). NJU7024D# has 652 units in stock (Active status). TLC1079CN has 1,227 units in stock (Last Time Buy). TLC1079IN has 1,023 units in stock (Last Time Buy). TLC274 series variants range from 767 to 4,300 units in stock (Last Time Buy). TLC279CN has 4,100 units in stock (Last Time Buy). TS27L4ACN has 3,100 units in stock (Obsolete).

Q: Do all substitute parts use the same 14-DIP package?

A: Yes. All substitute parts use 14-DIP (0.300", 7.62mm) through-hole packaging, identical to TS27L4ACN. Pin-to-pin compatibility is maintained across all listed substitutes, allowing direct socket replacement without PCB modifications.

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

A: TS27L4ACN requires minimum 3V. NJU7004D# operates from 1V minimum. NJU7024D# requires 3V minimum. TLC1079CN requires 1.4V minimum. TLC1079IN requires 3V minimum. TLC274ACN and TLC274BCN require 3V minimum. TLC274AIN and TLC274BIN require 4V minimum. TLC274CN requires 3V minimum. TLC279CN requires 3V minimum. Designs operating at 3V supply are compatible with all parts except TLC274AIN and TLC274BIN.

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