TS27M4AIN CMOS Amplifier 4-Circuit 14-DIP Equivalent & Substitute Parts

Part Overview

The TS27M4AIN 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, indicating discontinued production and limited availability in the market. The identification of equivalent and substitute parts is necessary to maintain design continuity, ensure project completion, and provide alternative sourcing options for applications currently utilizing this component.

Key Parameters

Parameter	Value
Manufacturer Part Number	TS27M4AIN
Manufacturer	STMicroelectronics
Category	Linear, Amplifiers
Amplifier Type	CMOS
Number of Circuits	4
Package / Case	14-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
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 TS27M4AIN is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Package type: 14-DIP (0.300", 7.62mm) through-hole configuration
Number of circuits: 4 independent amplifier circuits
Amplifier type: CMOS technology
Supply voltage range: Minimum 3 V to maximum 16 V overlap
Input bias current: 1 pA
Operating temperature range: Overlap with -40°C to 125°C specification

Secondary Compatibility Parameters:

Slew rate: 0.6 V/µs or greater
Gain bandwidth product: 1 MHz or greater
Output current per channel: 45 mA or greater
Voltage input offset: 900 µV or lower
Supply current: 150 µA or lower per channel set

Substitute parts are grouped into two categories based on amplifier classification: CMOS amplifiers (NJU7024D#, TLC1079CN, TLC1079IN, TLC279CN, TLC279IN) and general-purpose amplifiers (TLC274ACN, TLC274AIN, TLC274BCN, TLC274BIN, TLC274CN). All substitute parts maintain the 14-DIP package format and through-hole mounting configuration, ensuring direct mechanical compatibility with existing PCB layouts.

Parameter Comparison

Parameter	TS27M4AIN	NJU7024D#	TLC1079CN	TLC1079IN	TLC274ACN	TLC274AIN	TLC274BCN	TLC274BIN	TLC274CN	TLC279CN	TLC279IN
Manufacturer	STMicroelectronics	Nisshinbo Micro Devices	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Amplifier Type	CMOS	CMOS	CMOS	CMOS	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose	CMOS	CMOS
Number of Circuits	4	4	4	4	4	4	4	4	4	4	4
Package / Case	14-DIP	14-DIP	14-DIP	14-DIP	14-DIP	14-DIP	14-DIP	14-DIP	14-DIP	14-DIP	14-DIP
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)	0.6	0.4	0.032	0.032	3.6	3.6	3.6	3.6	3.6	3.6	3.6
Gain Bandwidth Product (MHz)	1	0.4	0.11	0.11	2.2	2.2	2.2	2.2	2.2	2.2	2.2
Current - Input Bias (pA)	1	1	1	1	0.6	0.6	0.6	0.6	0.6	0.6	0.6
Voltage - Input Offset (µV)	900	10000	180	180	900	900	340	340	1100	320	320
Current - Supply (µA x4)	150	150	29	29	2700	2700	2700	2700	2700	2700	2700
Current - Output / Channel (mA)	45	Not Specified	30	30	30	30	30	30	30	30	30
Voltage - Supply Span Min (V)	3	3	1.4	3	3	4	3	4	3	3	4
Voltage - Supply Span Max (V)	16	16	16	16	16	16	16	16	16	16	16
Operating Temperature (°C)	-40 ~ 125	-20 ~ 75	0 ~ 70	-40 ~ 85	0 ~ 70	-40 ~ 85	0 ~ 70	-40 ~ 85	0 ~ 70	0 ~ 70	-40 ~ 85
Product Status	Obsolete	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	Last Time Buy
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 (Preferred Category):

The NJU7024D# manufactured by Nisshinbo Micro Devices represents the closest functional equivalent to the TS27M4AIN. This device maintains CMOS amplifier architecture with 4 circuits in 14-DIP packaging and operates across the 3 V to 16 V supply range. The NJU7024D# is currently in active production status, providing superior long-term availability compared to the obsolete TS27M4AIN. Both devices are RoHS compliant and share identical input bias current specifications. The primary trade-off is a reduced operating temperature range (-20°C to 75°C versus -40°C to 125°C) and lower slew rate (0.4 V/µs versus 0.6 V/µs), which may be acceptable for applications not requiring extended temperature operation.

The TLC1079CN and TLC1079IN from Texas Instruments are CMOS amplifiers with 4 circuits in 14-DIP configuration. Both devices are designated as Last Time Buy status, indicating limited future availability. The TLC1079IN variant supports the extended operating temperature range (-40°C to 85°C) matching the lower bound of the TS27M4AIN specification. These devices feature significantly lower supply current consumption (29 µA versus 150 µA) and superior input offset voltage performance (180 µV versus 900 µV). However, the reduced slew rate (0.032 V/µs) and gain bandwidth product (110 kHz) represent substantial performance reductions suitable only for low-frequency applications.

The TLC279CN and TLC279IN from Texas Instruments provide CMOS amplifier functionality with enhanced performance characteristics. The TLC279IN variant supports the extended temperature range (-40°C to 85°C) and maintains the 4-circuit 14-DIP configuration. These devices deliver 3.6 V/µs slew rate and 2.2 MHz gain bandwidth product, exceeding the TS27M4AIN specifications. Supply current consumption is elevated at 2.7 mA per channel set, representing an 18-fold increase over the original device.

General-Purpose Amplifier Substitutes (Alternative Category):

The TLC274 series from Texas Instruments (variants ACN, AIN, BCN, BIN, CN) represents general-purpose amplifier alternatives with 4 circuits in 14-DIP through-hole packaging. These devices are classified as Last Time Buy status. The TLC274AIN and TLC274BIN variants support extended operating temperature ranges (-40°C to 85°C), aligning with the TS27M4AIN lower temperature specification. All TLC274 variants deliver 3.6 V/µs slew rate and 2.2 MHz gain bandwidth product, exceeding the original device performance. The trade-off is significantly elevated supply current consumption (2.7 mA per channel set versus 150 µA). The TLC274BCN and TLC274BIN variants feature improved input offset voltage (340 µV) compared to the TLC274ACN and TLC274AIN variants (900 µV), matching the TS27M4AIN specification.

Compliance and Certification Status:

All substitute parts maintain ROHS3 compliance or equivalent RoHS certification, ensuring regulatory alignment with the original TS27M4AIN. All devices are classified as REACH Unaffected and carry EAR99 export classification, matching the original component's regulatory profile. Moisture sensitivity level specifications are either 1 (Unlimited) or Not Applicable across all substitutes, indicating no moisture-related handling restrictions.

Selection Criteria Summary:

For applications requiring CMOS amplifier architecture with minimal performance deviation, the NJU7024D# is recommended as the primary substitute, provided the operating temperature range of -20°C to 75°C is acceptable. For applications requiring extended temperature operation (-40°C to 85°C), the TLC1079IN or TLC279IN are appropriate CMOS alternatives. For applications where enhanced slew rate and gain bandwidth product are beneficial and elevated supply current is acceptable, the TLC274AIN or TLC274BIN general-purpose amplifiers provide viable substitution paths. All substitute parts are mechanically compatible with existing 14-DIP through-hole PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the NJU7024D# directly replace the TS27M4AIN in all applications?

A: The NJU7024D# is mechanically and electrically compatible for most applications. The primary limitation is the reduced operating temperature range (-20°C to 75°C versus -40°C to 125°C). Applications operating outside this temperature window require alternative substitutes such as TLC1079IN or TLC279IN.

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

A: CMOS amplifiers (NJU7024D#, TLC1079 series, TLC279 series) are optimized for low input bias current and minimal power consumption. General-purpose amplifiers (TLC274 series) prioritize higher slew rate and gain bandwidth product at the cost of increased supply current consumption. Selection depends on application requirements for speed versus power efficiency.

Q: Are all substitute parts RoHS compliant?

A: Yes, all listed substitute parts maintain RoHS3 compliance or equivalent RoHS certification, matching the regulatory status of the TS27M4AIN.

Q: Can substitute parts with lower slew rates (TLC1079 series) be used in high-frequency applications?

A: The TLC1079 series with 0.032 V/µs slew rate and 110 kHz gain bandwidth product are suitable only for low-frequency applications. Applications requiring the original 1 MHz gain bandwidth product or higher slew rates should utilize TLC274 or TLC279 series substitutes.

Q: What is the impact of increased supply current consumption in TLC274 and TLC279 substitutes?

A: The TLC274 and TLC279 series consume 2.7 mA per channel set compared to 150 µA in the TS27M4AIN, representing an 18-fold increase. This impacts power supply design, thermal management, and battery life in portable applications. Applications with strict power budgets should prioritize the NJU7024D# or TLC1079 series.

Q: Are all substitute parts available in 14-DIP through-hole packaging?

A: Yes, all listed substitute parts are available exclusively in 14-DIP (0.300", 7.62mm) through-hole configuration, ensuring direct mechanical compatibility with existing PCB layouts designed for the TS27M4AIN.

Q: What is the significance of "Last Time Buy" product status?

A: Last Time Buy status indicates that the manufacturer has announced discontinuation of the product. Customers have a limited window to purchase remaining inventory before production ceases. This status applies to all Texas Instruments substitutes (TLC1079, TLC274, TLC279 series), making the active-status NJU7024D# preferable for long-term design continuity.

Q: Can the TS27M4AIN be substituted with parts having lower input offset voltage?

A: Yes, the TLC1079 series (180 µV) and TLC279 series (320 µV) offer superior input offset voltage performance compared to the TS27M4AIN (900 µV). This improvement is beneficial for precision analog applications requiring minimal DC offset errors.

Q: What packaging options are available for substitute parts?

A: All substitute parts are supplied in 14-DIP through-hole configuration. Packaging variants (Tube, Tray) differ only in quantity and handling format, not in the component itself. The Supplier Device Package designation (14-DIP or 14-PDIP) refers to the same physical package format.

Q: Is the TLC274 series suitable for CMOS-specific applications?

A: The TLC274 series is classified as general-purpose amplifiers rather than CMOS amplifiers. While functionally compatible in 14-DIP packaging, applications specifically requiring CMOS amplifier characteristics should prioritize NJU7024D#, TLC1079, or TLC279 series substitutes.

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