TS27L2ACN CMOS Amplifier Equivalent & Substitute Parts

Part Overview

The TS27L2ACN 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 TS27L2ACN operates across a supply voltage range of 3V to 16V with ultra-low input bias current of 1 pA and is designed for low-power applications requiring minimal quiescent current consumption.

Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary to ensure design continuity, long-term component availability, and compliance with current manufacturing standards. Substitute selection must maintain compatibility with the original electrical specifications, package form factor, and operating parameters to ensure direct replacement capability.

Key Parameters

Parameter	TS27L2ACN Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	2	—
Package / Case	8-DIP (0.300", 7.62mm)	—
Slew Rate	0.04	V/µs
Gain Bandwidth Product	100	kHz
Current - Input Bias	1	pA
Voltage - Input Offset	1.1	mV
Current - Supply	10	µA (x2 Channels)
Current - Output / Channel	45	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	16	V
Operating Temperature	0 to 70	°C
Mounting Type	Through Hole	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the TS27L2ACN are selected based on strict electrical and mechanical compatibility criteria. The primary substitution logic is based on the following key parameters:

Critical Matching Parameters:

Amplifier Type: CMOS technology
Number of Circuits: Dual-channel (2 circuits)
Package Form Factor: 8-DIP (0.300", 7.62mm) through-hole mounting
Supply Voltage Range: Minimum 3V, Maximum 16V
Input Bias Current: Ultra-low leakage (pA range)
Operating Temperature: 0°C to 70°C minimum

Substitution Categories:

Direct Substitutes maintain all critical parameters within acceptable tolerance and provide pin-compatible replacement:

TLC27L2ACP: Texas Instruments LinCMOS™ series, identical package and pin configuration, compatible electrical specifications

Compatible Alternatives share the same package, amplifier type, and dual-channel configuration but may have enhanced performance characteristics:

TLC1078CP and TLC1078IP: CMOS amplifiers with improved input offset voltage and comparable bandwidth
TLC25L2CP and TLC25L2BCP: Single-ended output variants with enhanced slew rate
TLC272ACP: Higher bandwidth and slew rate performance in identical package

Functional Equivalents provide similar amplification function in the same package but with different output configurations or performance tiers:

TLC25M2ACP and TLC25M2CP: Open-drain output variants
LM2904P: General-purpose amplifier with extended temperature range and higher supply voltage capability

All substitute parts comply with RoHS3 and REACH regulations, matching the environmental compliance status of the original component.

Parameter Comparison

Parameter	TS27L2ACN	TLC27L2ACP	TLC1078CP	TLC1078IP	TLC272ACP	LM2904P	Unit
Manufacturer	STMicroelectronics	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	—
Amplifier Type	CMOS	CMOS	CMOS	CMOS	CMOS	General Purpose	—
Number of Circuits	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)	—
Slew Rate	0.04	0.03	0.032	0.032	5.3	0.3	V/µs
Gain Bandwidth Product	100	110	110	110	2200	700	kHz
Current - Input Bias	1	0.6	1	1	0.7	20	pA / nA
Voltage - Input Offset	1.1	0.9	0.18	0.18	0.9	3	mV
Current - Supply	10	20	29	29	1900	500	µA (x2 Channels)
Current - Output / Channel	45	30	30	30	30	40	mA
Voltage - Supply Span (Min)	3	3	1.4	3	3	3	V
Voltage - Supply Span (Max)	16	16	16	16	16	26	V
Operating Temperature	0 to 70	0 to 70	0 to 70	-40 to 85	0 to 70	-40 to 125	°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	—
Product Status	Obsolete	Last Time Buy	Active	Active	Active	Active	—
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	—

Engineering Selection Recommendations

For Direct Replacement (Pin-Compatible, Electrical Equivalent):

The TLC27L2ACP from Texas Instruments is the primary direct substitute for the TS27L2ACN. Both devices share identical package geometry (8-DIP), dual-channel CMOS architecture, and compatible electrical specifications within the 3V to 16V supply range. The TLC27L2ACP exhibits marginally superior input bias current (0.6 pA versus 1 pA) and input offset voltage (900 µV versus 1.1 mV), providing enhanced precision. However, the TLC27L2ACP carries a "Last Time Buy" product status, indicating limited future availability. Current inventory of 1289 units is available.

For Long-Term Availability (Active Production Status):

The TLC1078CP and TLC1078IP are recommended for applications requiring extended component availability and long-term supply assurance. Both devices maintain CMOS amplifier architecture, dual-channel configuration, and 8-DIP package compatibility. The TLC1078CP operates within the 0°C to 70°C temperature range matching the original specification, while the TLC1078IP extends the operating range to -40°C to 85°C for enhanced environmental performance. Both variants demonstrate superior input offset voltage (180 µV) and maintain comparable bandwidth (110 kHz). The TLC1078IP is currently in active production with 2200 units in stock.

For Enhanced Performance Applications:

The TLC272ACP provides significantly improved dynamic performance with 5.3 V/µs slew rate and 2.2 MHz gain bandwidth product, suitable for applications requiring faster signal processing. This device maintains the 8-DIP package and dual-channel CMOS configuration with active production status and 6700 units in inventory. The TLC272ACP is appropriate for designs where the original TS27L2ACN performance specifications are conservative margins.

For Extended Supply Voltage Range:

The LM2904P extends the maximum supply voltage to 26V and provides an expanded operating temperature range (-40°C to 125°C). This general-purpose amplifier is suitable for applications requiring broader environmental tolerance, though it exhibits higher input bias current (20 nA) and input offset voltage (3 mV) compared to the CMOS alternatives. The LM2904P is in active production with 10300 units available.

Compliance and Regulatory Considerations:

All recommended substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring compatibility with current environmental regulations. The ECCN classification (EAR99) and HTSUS code (8542.33.0001) remain consistent across all alternatives, facilitating procurement and customs documentation.

Frequently Asked Questions (FAQ)

Q: Can the TLC27L2ACP be used as a direct replacement for the TS27L2ACN without circuit modifications?

A: Yes. The TLC27L2ACP is pin-compatible and electrically equivalent within the specified operating parameters. Both devices utilize identical 8-DIP package geometry, dual-channel CMOS architecture, and compatible supply voltage ranges (3V to 16V). No circuit modifications are required for direct substitution.

Q: What is the primary difference between the TLC1078CP and TLC1078IP?

A: The TLC1078CP operates within 0°C to 70°C, matching the original TS27L2ACN specification. The TLC1078IP extends the operating temperature range to -40°C to 85°C, providing enhanced environmental tolerance for applications requiring broader temperature performance. Both devices share identical electrical specifications and package configuration.

Q: Why is the TLC272ACP listed as a substitute if it has significantly higher slew rate and bandwidth?

A: The TLC272ACP is classified as a compatible alternative rather than a direct equivalent. While it maintains the same package, dual-channel CMOS architecture, and supply voltage range, its enhanced performance characteristics (5.3 V/µs slew rate versus 0.04 V/µs) make it suitable for applications where faster signal processing is beneficial. The higher performance does not preclude its use in designs originally specified for the TS27L2ACN, provided the application can accommodate the improved dynamic response.

Q: Is the LM2904P suitable for applications originally designed for the TS27L2ACN?

A: The LM2904P provides functional amplification in the same 8-DIP package with dual-channel configuration. However, it is classified as a general-purpose amplifier rather than a CMOS device, resulting in higher input bias current (20 nA versus 1 pA) and input offset voltage (3 mV versus 1.1 mV). The LM2904P is appropriate for applications where ultra-low input bias current is not critical and where the extended supply voltage range (up to 26V) and temperature range (-40°C to 125°C) provide design advantages.

Q: What is the significance of "Last Time Buy" product status for the TLC27L2ACP?

A: "Last Time Buy" indicates that the manufacturer has announced discontinuation of the device. While current inventory is available (1289 units), future procurement may become impossible. For applications requiring long-term component availability and supply continuity, the TLC1078CP or TLC1078IP with "Active" production status are preferred alternatives.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts maintain ROHS3 compliance status, ensuring compatibility with current environmental regulations and procurement requirements. The original TS27L2ACN also carries ROHS3 compliance certification.

Q: Can the TLC25L2CP or TLC25L2BCP be used as substitutes?

A: The TLC25L2CP and TLC25L2BCP are compatible alternatives with identical package geometry and dual-channel CMOS architecture. However, both devices feature single-ended output configuration and significantly higher slew rate (2.9 V/µs). These variants are suitable for applications where single-ended output topology is acceptable and where enhanced slew rate performance is beneficial. Both devices carry "Last Time Buy" status with limited future availability.

Q: What is the difference between open-drain output variants (TLC25M2ACP, TLC25M2CP) and standard output configurations?

A: Open-drain output variants require external pull-up resistors to establish output voltage levels, providing flexibility in output voltage selection and enabling direct interfacing with different logic families. Standard output configurations provide direct voltage output without external components. Open-drain variants are suitable for applications requiring output voltage level translation or multi-device output line sharing.

Q: How should I verify compatibility before implementing a substitute part?

A: Verify compatibility by confirming: (1) identical 8-DIP package geometry and pin assignment, (2) supply voltage range encompasses your application requirements, (3) input bias current and input offset voltage specifications meet circuit precision requirements, (4) output current capability (45 mA for TS27L2ACN) is sufficient for your load, (5) operating temperature range covers your application environment, and (6) slew rate and bandwidth are adequate for your signal processing requirements.

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