TLC27L4ACD CMOS Amplifier Equivalent & Substitute Parts

Part Overview

The TLC27L4ACD is a CMOS amplifier integrated circuit manufactured by Texas Instruments, containing four independent operational amplifier circuits in a 14-SOIC surface mount package. This device is classified as Last Time Buy, indicating discontinued production with limited remaining inventory. The TLC27L4ACD operates across a 3V to 16V supply voltage range with low input bias current (0.7 pA) and is suitable for low-power analog signal processing applications requiring CMOS technology.

Due to Last Time Buy status, equivalent substitute parts from active product lines are necessary to ensure long-term design continuity and supply chain reliability. Substitute selection must maintain compatibility across electrical specifications, package dimensions, and operating temperature ranges.

Key Parameters

Parameter	Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	4	—
Slew Rate	0.05	V/µs
Gain Bandwidth Product	110	kHz
Current - Input Bias	0.7	pA
Voltage - Input Offset	1.1	mV
Current - Supply (x4 Channels)	57	µA
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	16	V
Operating Temperature	0 to 70	°C
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the TLC27L4ACD are grouped based on electrical and mechanical compatibility within the CMOS amplifier category. The primary substitution criteria are:

Critical Parameters for Substitution:

Amplifier Type: CMOS technology
Number of Circuits: 4 independent channels
Package / Case: 14-SOIC form factor (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Supply Voltage Range: 3V to 16V minimum compatibility
RoHS3 Compliance: Required for regulatory alignment

Substitution Groups:

Group 1 - Direct Electrical Equivalents (Identical Specifications): TLC27L4ACDR maintains identical electrical characteristics to the TLC27L4ACD, differing only in packaging format (Tape & Reel vs. standard packaging). This part is manufactured by Texas Instruments and carries Active product status, ensuring continued availability.

Group 2 - Functional Equivalents with Enhanced Performance (STMicroelectronics TS27L4 Series): TS27L4AIDT, TS27L4CDT, and TS27L4IDT are STMicroelectronics alternatives with improved specifications: lower slew rate (0.04V/µs vs. 0.05V/µs), reduced supply current (10µA vs. 57µA per four channels), lower input offset voltage (900µV to 1.1mV), and higher output current capability (45mA vs. 30mA per channel). These parts maintain the 14-SOIC package and 3V to 16V supply range. Temperature range variants include 0°C to 70°C and -40°C to 125°C options.

Group 3 - Higher Performance Alternatives (STMicroelectronics TS27M4 Series): TS27M4CDT and TS27M4IDT offer significantly enhanced bandwidth (1 MHz vs. 110 kHz) and slew rate (0.6V/µs vs. 0.05V/µs) while maintaining 4-circuit CMOS architecture, 14-SOIC packaging, and 3V to 16V supply compatibility. These parts are suitable for applications requiring faster signal processing.

All substitute parts maintain RoHS3 compliance, MSL Level 1 rating, and Surface Mount compatibility with the original TLC27L4ACD footprint.

Parameter Comparison

Parameter	TLC27L4ACD	TLC27L4ACDR	TS27L4AIDT	TS27L4CDT	TS27L4IDT	TS27M4CDT	TS27M4IDT
Manufacturer	Texas Instruments	Texas Instruments	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Product Status	Last Time Buy	Active	Active	Active	Active	Active	Active
Amplifier Type	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS
Number of Circuits	4	4	4	4	4	4	4
Slew Rate (V/µs)	0.05	0.05	0.04	0.04	0.04	0.6	0.6
Gain Bandwidth Product (kHz)	110	110	100	100	100	1000	1000
Current - Input Bias (pA)	0.7	0.7	1	1	1	1	1
Voltage - Input Offset (mV)	1.1	1.1	0.9	1.1	1.1	1.1	1.1
Current - Supply (µA, x4 Channels)	57	57	10	10	10	150	150
Current - Output / Channel (mA)	30	30	45	45	45	45	45
Voltage - Supply Span (Min, V)	3	3	3	3	3	3	3
Voltage - Supply Span (Max, V)	16	16	16	16	16	16	16
Operating Temperature (°C)	0 to 70	0 to 70	-40 to 125	0 to 70	-40 to 125	0 to 70	-40 to 125
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation - TLC27L4ACDR: For designs requiring exact electrical equivalence to the TLC27L4ACD, the TLC27L4ACDR is the optimal substitute. Manufactured by Texas Instruments with Active product status, this part provides identical electrical specifications and maintains the same 14-SOIC package footprint. The only difference is packaging format (Tape & Reel), which does not affect circuit performance. This selection ensures maximum design compatibility with zero circuit modifications required.

Secondary Recommendation - TS27L4 Series (TS27L4AIDT, TS27L4CDT, TS27L4IDT): STMicroelectronics TS27L4 variants offer improved power efficiency (10µA supply current vs. 57µA) and enhanced output current capability (45mA vs. 30mA per channel) while maintaining the same 14-SOIC package and 3V to 16V supply range. These parts are suitable for applications where lower power consumption is beneficial. TS27L4AIDT and TS27L4IDT support extended temperature range (-40°C to 125°C), enabling use in industrial and automotive environments beyond the original 0°C to 70°C specification.

Performance Enhancement Option - TS27M4 Series (TS27M4CDT, TS27M4IDT): For applications requiring higher bandwidth (1 MHz vs. 110 kHz) and faster slew rate (0.6V/µs vs. 0.05V/µs), the TS27M4 series provides significant performance improvement. These parts maintain 4-circuit CMOS architecture, 14-SOIC packaging, and 3V to 16V supply compatibility. TS27M4IDT supports extended temperature range (-40°C to 125°C). Increased supply current (150µA vs. 57µA) reflects the higher performance capability.

Compliance Verification: All substitute parts maintain RoHS3 compliance, MSL Level 1 rating, and REACH Unaffected status, ensuring regulatory alignment with the original TLC27L4ACD across global markets.

Frequently Asked Questions (FAQ)

Q: Can TLC27L4ACDR be used as a direct replacement for TLC27L4ACD without circuit modifications?

A: Yes. TLC27L4ACDR is electrically identical to TLC27L4ACD across all specified parameters including slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, output current, and supply voltage range. Both operate within 0°C to 70°C temperature range and use identical 14-SOIC packaging. The only difference is packaging format (Tape & Reel vs. standard), which does not affect circuit performance.

Q: What are the key differences between TS27L4 and TS27M4 series substitutes?

A: The TS27M4 series provides higher performance specifications: 1 MHz gain bandwidth product versus 100 kHz for TS27L4, and 0.6V/µs slew rate versus 0.04V/µs for TS27L4. TS27M4 requires higher supply current (150µA vs. 10µA for four channels). Both series maintain 4-circuit CMOS architecture, 14-SOIC packaging, and 3V to 16V supply compatibility. Selection depends on application bandwidth requirements.

Q: Are STMicroelectronics TS27L4 parts pin-compatible with TLC27L4ACD?

A: Yes. All TS27L4 variants (TS27L4AIDT, TS27L4CDT, TS27L4IDT) maintain identical 14-SOIC package dimensions (0.154", 3.90mm Width) and pin configuration as TLC27L4ACD. Surface mount footprint compatibility is maintained across all substitute parts listed.

Q: Which substitute part supports the widest operating temperature range?

A: TS27L4AIDT, TS27L4IDT, and TS27M4IDT all support -40°C to 125°C operating temperature range, compared to 0°C to 70°C for TLC27L4ACD. These parts are suitable for industrial and automotive applications requiring extended temperature specifications.

Q: What is the impact of selecting TS27L4 series on power consumption?

A: TS27L4 series reduces supply current to 10µA for four channels, compared to 57µA for TLC27L4ACD. This represents an 82% reduction in quiescent current consumption, beneficial for battery-powered or low-power applications. TS27M4 series increases supply current to 150µA due to higher bandwidth capability.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (TLC27L4ACDR, TS27L4AIDT, TS27L4CDT, TS27L4IDT, TS27M4CDT, TS27M4IDT) maintain RoHS3 compliance and MSL Level 1 rating, ensuring regulatory alignment with the original TLC27L4ACD.

Q: Can TS27M4 series be used in applications designed for TLC27L4ACD?

A: TS27M4 series maintains package compatibility and supply voltage range (3V to 16V) with TLC27L4ACD. However, the significantly higher bandwidth (1 MHz vs. 110 kHz) and slew rate (0.6V/µs vs. 0.05V/µs) may introduce different circuit behavior in applications sensitive to these parameters. Circuit validation is necessary to confirm suitability for specific application requirements.

Q: What packaging options are available for substitute parts?

A: TLC27L4ACDR is supplied in Tape & Reel (TR) format. TS27L4AIDT is supplied in Tape & Reel (TR). TS27L4CDT and TS27M4CDT are supplied in Cut Tape (CT) format. TS27L4IDT and TS27M4IDT are supplied in Cut Tape (CT) and Digi-Reel® format. All parts use identical 14-SOIC package case.

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