TS27M2AIN CMOS Amplifier Equivalent & Substitute Parts

Part Overview

The TS27M2AIN is a CMOS amplifier integrated circuit manufactured by STMicroelectronics, configured as a dual-channel (2 circuit) operational amplifier in an 8-pin Mini DIP package. This device is classified as obsolete, indicating discontinued production and limited availability in the market. The TS27M2AIN is designed for applications requiring low-power CMOS amplification with specified electrical characteristics including a 1 MHz gain bandwidth product and 0.6 V/µs slew rate. Due to its obsolete status, identification of functionally equivalent substitute parts is necessary for design continuity, system maintenance, and component procurement.

Key Parameters

Parameter	TS27M2AIN Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	2	—
Package / Case	8-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 (x2 Channels)	µA
Current - Output / Channel	45	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	16	V
Operating Temperature	-40 to 125	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the TS27M2AIN are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Mandatory Compatibility Criteria:

Amplifier Type: CMOS technology
Number of Circuits: 2 (dual-channel configuration)
Package / Case: 8-DIP (0.300", 7.62mm) form factor
Mounting Type: Through Hole

Secondary Electrical Parameters for Functional Equivalence:

Gain Bandwidth Product: 1 MHz (nominal reference)
Slew Rate: 0.6 V/µs (nominal reference)
Voltage - Supply Span: 3 V to 16 V operating range
Current - Input Bias: 1 pA (nominal reference)
Voltage - Input Offset: 900 µV (nominal reference)

Substitute parts are grouped into two categories based on their electrical performance relative to the TS27M2AIN:

Category A - Direct CMOS Equivalents: Parts maintaining CMOS amplifier architecture with comparable gain bandwidth product and slew rate specifications within the same 8-DIP package. These include TLC25L2CP, TLC25L2BCP, TLC252BCP, and TLC25M2ACP.

Category B - Alternative Amplifier Types: Parts offering different amplifier architectures (General Purpose, Rail-to-Rail CMOS) or performance characteristics that may serve equivalent functional roles in specific applications while maintaining the 8-DIP package and dual-channel configuration. These include ICL7621BCPA+, LM2904N/NOPB, LM2904P, LMC6032IN/NOPB, TLC1078CP, and TLC1078IP.

Parameter Comparison

Parameter	TS27M2AIN	ICL7621BCPA+	LM2904N/NOPB	LM2904P	LMC6032IN/NOPB	TLC1078CP	TLC1078IP	TLC252BCP	TLC25L2BCP	TLC25L2CP	TLC25M2ACP
Amplifier Type	CMOS	CMOS	General Purpose	General Purpose	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS
Number of Circuits	2	2	2	2	2	2	2	2	2	2	2
Package / Case	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-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)	0.6	1.6	—	0.3	1.1	0.032	0.032	2.9	2.9	2.9	2.9
Gain Bandwidth Product (MHz)	1	1.4	1	0.7	1.4	0.11	0.11	2.2	0.11	0.11	1.7
Current - Input Bias (pA)	1	1	45 nA	20 nA	0.04	1	1	0.6	0.7	0.7	0.7
Voltage - Input Offset (mV)	0.9	5	2	3	1	0.18	0.18	0.29	0.235	1.1	0.9
Current - Supply (µA, x2 Channels)	150	1000	1000	500	750	29	29	1900	29	29	285
Current - Output / Channel (mA)	45	—	40	40	40	30	30	30	30	30	30
Voltage - Supply Span Min (V)	3	2	3	3	4.75	1.4	3	1.4	1.4	1.4	1.4
Voltage - Supply Span Max (V)	16	16	32	26	15.5	16	16	16	16	16	16
Operating Temperature (°C)	-40 to 125	0 to 70	-40 to 85	-40 to 125	-40 to 85	0 to 70	-40 to 85	0 to 70	0 to 70	0 to 70	0 to 70
Product Status	Obsolete	Active	Active	Active	Last Time Buy	Active	Active	Last Time Buy	Last Time Buy	Last Time Buy	Last Time Buy
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes for Direct Replacement:

The LM2904P and LM2904N/NOPB represent the most suitable substitutes for the TS27M2AIN in applications where component availability and long-term supply continuity are critical factors. Both devices are manufactured by Texas Instruments and maintain Active product status, ensuring ongoing availability and manufacturing support. The LM2904P offers extended operating temperature range (-40°C to 125°C) matching the TS27M2AIN specification, while the LM2904N/NOPB provides a wider supply voltage range (3 V to 32 V). Both parts are ROHS3 compliant and share identical 8-DIP packaging and through-hole mounting characteristics. The LM2904 series is a general-purpose amplifier architecture rather than CMOS, but maintains compatible electrical performance for most applications requiring the TS27M2AIN.

Secondary CMOS-Specific Substitutes:

For applications requiring CMOS amplifier architecture, the TLC25L2CP and TLC25L2BCP offer CMOS technology with single-ended output configuration. These Texas Instruments LinCMOS™ series devices maintain the 8-DIP package and dual-channel configuration. The TLC25M2ACP provides open-drain output configuration with CMOS architecture and comparable gain bandwidth product (1.7 MHz). All three devices are classified as Last Time Buy, indicating limited future availability.

Alternative High-Performance Substitute:

The ICL7621BCPA+ manufactured by Analog Devices Inc./Maxim Integrated provides rail-to-rail CMOS amplification with enhanced slew rate (1.6 V/µs) and gain bandwidth product (1.4 MHz). This device is Active status and offers superior dynamic performance characteristics. However, the operating temperature range (0°C to 70°C) is narrower than the TS27M2AIN, and minimum supply voltage is reduced to 2 V.

Low-Power Alternatives:

The TLC1078CP and TLC1078IP offer ultra-low power consumption (29 µA total supply current) with CMOS architecture, suitable for battery-powered or power-constrained applications. These devices feature significantly reduced slew rate (0.032 V/µs) and gain bandwidth product (110 kHz), limiting applicability to low-frequency signal processing. The TLC1078IP maintains extended operating temperature range (-40°C to 85°C) and is Active status.

Compliance and Regulatory Considerations:

All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, consistent with the TS27M2AIN. Moisture sensitivity level (MSL) ratings are equivalent or superior across all substitutes. All parts are classified under identical HTSUS code (8542.33.0001) and ECCN (EAR99), indicating no additional regulatory restrictions for substitution.

Frequently Asked Questions (FAQ)

Q: Can the TS27M2AIN be directly replaced with the LM2904P in existing circuit designs?

A: The LM2904P is mechanically and electrically compatible with the TS27M2AIN. Both devices feature 8-DIP through-hole packaging, dual-channel configuration, and overlapping supply voltage range (3 V to 16 V). The primary difference is amplifier architecture: the TS27M2AIN is CMOS while the LM2904P is general-purpose. Pin-for-pin compatibility exists, and the LM2904P is suitable for direct socket replacement in most applications. Verify that the application does not require specific CMOS characteristics such as extremely high input impedance or ultra-low input bias current.

Q: What is the difference between CMOS and general-purpose amplifier types in the context of substitution?

A: CMOS amplifiers feature extremely high input impedance (typically greater than 10¹² ohms) and very low input bias current (picoampere range), making them suitable for high-impedance signal sources and precision measurement applications. General-purpose amplifiers such as the LM2904 series have lower input impedance and higher input bias current (nanoampere range) but offer broader supply voltage ranges and wider operating temperature specifications. For applications requiring high input impedance or ultra-low bias current, CMOS substitutes (TLC25L2CP, TLC25M2ACP) are preferred. For general signal amplification with less stringent input impedance requirements, general-purpose substitutes (LM2904P, LM2904N/NOPB) are acceptable.

Q: Are the TLC25L2CP and TLC25L2BCP interchangeable with the TS27M2AIN?

A: Both TLC25L2CP and TLC25L2BCP are CMOS dual-channel amplifiers in 8-DIP packages with compatible pinouts. However, these devices feature single-ended output configuration and significantly higher slew rate (2.9 V/µs) compared to the TS27M2AIN (0.6 V/µs). The gain bandwidth product is substantially lower (110 kHz versus 1 MHz). These parts are suitable for low-frequency applications but not for high-speed signal processing. Both devices are classified as Last Time Buy, indicating limited future availability. Verify application frequency requirements before substitution.

Q: What does "Last Time Buy" product status mean for component selection?

A: Last Time Buy status indicates that the manufacturer has announced discontinuation of the product and is accepting final purchase orders within a specified window before production ends. Components with Last Time Buy status include TLC252BCP, TLC25L2BCP, TLC25L2CP, TLC25M2ACP, and LMC6032IN/NOPB. These parts remain available for current procurement but should not be selected for new long-term designs. For new designs or applications requiring extended component availability, select substitutes with Active product status such as LM2904P, LM2904N/NOPB, ICL7621BCPA+, TLC1078CP, or TLC1078IP.

Q: How do supply voltage ranges affect substitution decisions?

A: The TS27M2AIN operates across 3 V to 16 V supply range. Substitute parts exhibit varying supply voltage specifications: LM2904N/NOPB extends to 32 V maximum, LM2904P to 26 V, while ICL7621BCPA+ operates from 2 V minimum. If the application uses supply voltages outside the 3 V to 16 V range, verify that the selected substitute accommodates the required voltage. For example, if the circuit operates at 2 V supply, only ICL7621BCPA+ is suitable. If supply voltage exceeds 16 V, LM2904N/NOPB or LM2904P are required. Verify supply voltage specifications in the application schematic before final substitution.

Q: What is the significance of operating temperature range in substitution?

A: The TS27M2AIN operates across -40°C to 125°C, covering industrial and extended temperature applications. Several substitutes have narrower temperature ranges: ICL7621BCPA+ (0°C to 70°C), TLC252BCP (0°C to 70°C), TLC25L2BCP (0°C to 70°C), TLC25L2CP (0°C to 70°C), and TLC25M2ACP (0°C to 70°C). The LM2904P maintains the full -40°C to 125°C range, while LM2904N/NOPB covers -40°C to 85°C. For applications requiring operation at temperatures below 0°C or above 85°C, select LM2904P or verify that the narrower-range substitute is acceptable for the specific deployment environment.

Q: Can the TLC1078CP or TLC1078IP replace the TS27M2AIN in high-frequency applications?

A: No. The TLC1078CP and TLC1078IP are ultra-low-power CMOS amplifiers with gain bandwidth product of only 110 kHz, compared to the TS27M2AIN's 1 MHz specification. These devices are designed for low-frequency, power-constrained applications such as battery-powered instrumentation. The slew rate is 0.032 V/µs, approximately 19 times slower than the TS27M2AIN. These substitutes are unsuitable for applications requiring signal frequencies above approximately 10 kHz or fast transient response. Select these devices only for low-frequency applications where ultra-low power consumption is a primary design requirement.

Q: What packaging considerations apply when substituting the TS27M2AIN?

A: All listed substitute parts maintain identical 8-DIP (0.300", 7.62mm) through-hole packaging and dual-channel configuration. Pin-for-pin compatibility exists across all substitutes, allowing direct socket replacement without PCB modification. The through-hole mounting type is consistent across all parts, compatible with standard DIP sockets and PCB through-hole assembly processes. No mechanical redesign or board rework is required for substitution. Verify that the application PCB includes DIP socket or through-hole pads compatible with 0.300" (7.62mm) DIP spacing before substitution.

Q: How do input offset voltage specifications affect circuit performance during substitution?

A: The TS27M2AIN specifies 900 µV input offset voltage. Substitute parts exhibit varying offset voltages: ICL7621BCPA+ (5 mV), LM2904N/NOPB (2 mV), LM2904P (3 mV), LMC6032IN/NOPB (1 mV), TLC1078CP (180 µV), TLC1078IP (180 µV), TLC252BCP (290 µV), TLC25L2BCP (235 µV), TLC25L2CP (1.1 mV), and TLC25M2ACP (900 µV). For precision DC amplification or instrumentation applications requiring low offset voltage, select TLC1078CP, TLC1078IP, or TLC252BCP. For general-purpose AC amplification, offset voltage differences are typically negligible. Verify application offset voltage tolerance specifications before final substitution.

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