TS27M4ACN CMOS Amplifier Equivalent & Substitute Parts

Part Overview

The TS27M4ACN is a CMOS amplifier integrated circuit manufactured by STMicroelectronics, configured as a 4-circuit operational amplifier in a 14-DIP package. This component is classified as obsolete, indicating discontinued production and limited availability for new designs. The identification of equivalent and substitute parts is necessary to support ongoing maintenance, repair, and legacy system support where the original component is no longer procurable through standard distribution channels.

Key Parameters

Parameter	Value
Manufacturer Part Number	TS27M4ACN
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	0°C ~ 70°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the TS27M4ACN 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 mounting
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: Minimum 0°C to maximum 70°C overlap

Secondary Compatibility Parameters:

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

Substitute parts are grouped into two categories based on amplifier classification: CMOS amplifiers (direct functional equivalents) and general-purpose amplifiers (broader application compatibility). Parts meeting all primary criteria and maintaining secondary parameter specifications within acceptable operational margins are listed as valid substitutes.

Parameter Comparison

Parameter	TS27M4ACN	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)	0 ~ 70	-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

CMOS Amplifier Direct Equivalents:

The NJU7024D# (Nisshinbo Micro Devices) and TLC1079CN/TLC1079IN (Texas Instruments) are classified as CMOS amplifier direct equivalents. These parts maintain the CMOS amplifier type classification and 4-circuit configuration in 14-DIP packaging. The NJU7024D# is currently in active production status, providing long-term availability for new procurement. The TLC1079 series is designated Last Time Buy, indicating limited future availability but current stock presence. All three parts maintain RoHS3 compliance and REACH unaffected status, meeting environmental regulatory requirements equivalent to the TS27M4ACN.

General Purpose Amplifier Alternatives:

The TLC274 series (TLC274ACN, TLC274AIN, TLC274BCN, TLC274BIN, TLC274CN) and TLC279 series (TLC279CN, TLC279IN) represent general-purpose amplifier alternatives. These parts provide enhanced performance characteristics including higher slew rates (3.6 V/µs versus 0.6 V/µs) and greater gain bandwidth products (2.2 MHz versus 1 MHz). All TLC274 and TLC279 variants are designated Last Time Buy status with substantial current inventory levels. These parts maintain full RoHS3 compliance and REACH unaffected status.

Compliance and Regulatory Alignment:

All substitute parts listed maintain ROHS3 compliance or equivalent RoHS certification status. Moisture sensitivity levels are either 1 (Unlimited) or Not Applicable, indicating no special handling requirements beyond standard component storage practices. ECCN classification (EAR99) and HTSUS codes (8542.33.0001) are consistent across all parts, confirming equivalent export and tariff classification.

Temperature Range Considerations:

The TS27M4ACN operates within 0°C to 70°C. The NJU7024D# extends the lower temperature limit to -20°C. The TLC1079IN, TLC274AIN, TLC274BIN, and TLC279IN variants extend the upper temperature limit to 85°C and lower limit to -40°C, providing broader environmental operating capability for applications requiring extended temperature performance.

Frequently Asked Questions (FAQ)

Q: Can the NJU7024D# be used as a direct replacement for the TS27M4ACN?

A: The NJU7024D# is compatible as a substitute based on package type (14-DIP), circuit count (4), amplifier type (CMOS), and supply voltage range (3 V to 16 V). However, the NJU7024D# exhibits lower slew rate (0.4 V/µs versus 0.6 V/µs) and reduced gain bandwidth product (400 kHz versus 1 MHz). Applications sensitive to signal rise time or frequency response require evaluation of these performance differences.

Q: What is the difference between TLC1079CN and TLC1079IN?

A: Both parts are CMOS amplifiers in 14-DIP packaging with identical electrical specifications. The primary difference is operating temperature range: TLC1079CN operates 0°C to 70°C, while TLC1079IN operates -40°C to 85°C. Selection depends on the target application's environmental requirements. Both are Last Time Buy status.

Q: Why are TLC274 and TLC279 series listed as alternatives if they have different amplifier types?

A: The TLC274 series is classified as general-purpose amplifiers, while TLC279 series is classified as CMOS amplifiers. Both share identical 14-DIP packaging, 4-circuit configuration, and overlapping supply voltage ranges (3 V to 16 V). The TLC274 and TLC279 series provide superior performance metrics (3.6 V/µs slew rate, 2.2 MHz gain bandwidth product) compared to the TS27M4ACN. These parts are suitable for applications where enhanced bandwidth and slew rate performance are beneficial or required.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed maintain RoHS3 compliance or equivalent RoHS certification. The TS27M4ACN is ROHS3 compliant. The NJU7024D# is RoHS compliant. All Texas Instruments parts (TLC1079, TLC274, TLC279 series) are ROHS3 compliant. This ensures regulatory alignment for applications subject to RoHS directives.

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

A: Last Time Buy designation indicates that the manufacturer has announced end-of-life for the product. Current inventory is available for purchase, but production will cease. After the Last Time Buy date, parts will no longer be manufactured. For long-term design requirements, parts with Active status (such as NJU7024D#) are preferred. For legacy system support, Last Time Buy parts provide a defined window for procurement before discontinuation.

Q: Can I use TLC274 or TLC279 in place of TS27M4ACN in existing circuit boards?

A: Physical compatibility is confirmed: all parts use 14-DIP through-hole packaging with identical pin spacing (0.300", 7.62mm). Electrical compatibility requires verification of application-specific requirements. The TLC274 and TLC279 series have higher supply current consumption (2.7 mA per channel set versus 150 µA), which may impact power supply design. The enhanced performance characteristics (higher slew rate and bandwidth) are generally beneficial but require confirmation that existing circuit designs do not depend on the lower performance specifications of the TS27M4ACN.

Q: What is the inventory status for substitute parts?

A: Current inventory levels are: NJU7024D# (652 pcs), TLC1079CN (1227 pcs), TLC1079IN (1023 pcs), TLC274ACN (4200 pcs), TLC274AIN (4300 pcs), TLC274BCN (2961 pcs), TLC274BIN (767 pcs), TLC274CN (4300 pcs), TLC279CN (4100 pcs), TLC279IN (897 pcs). Inventory levels are subject to change based on current demand and procurement activity.

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