TS27L4CD Equivalent & Substitute Parts

Part Overview

The TS27L4CD is a CMOS amplifier integrated circuit manufactured by STMicroelectronics, containing four independent circuits in a 14-SOIC surface mount package. This device is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and production requirements. The TS27L4CD operates across a supply voltage range of 3V to 16V with an operating temperature range of 0°C to 70°C, making it suitable for general-purpose CMOS amplification applications requiring low power consumption and minimal input bias current.

Key Parameters

Parameter	Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	4	—
Slew Rate	0.04	V/µs
Gain Bandwidth Product	100	kHz
Current - Input Bias	1	pA
Voltage - Input Offset	1.1	mV
Current - Supply (x4 Channels)	10	µA
Current - Output / Channel	45	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 (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the TS27L4CD is determined by strict alignment of electrical and mechanical parameters within the CMOS amplifier category. The primary substitution criteria are:

Critical Matching Parameters:

Amplifier Type: CMOS
Number of Circuits: 4
Package / Case: 14-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Voltage - Supply Span: Minimum 3V to Maximum 16V
Operating Temperature: 0°C to 70°C or extended range

Secondary Compatibility Parameters:

Slew Rate: 0.04V/µs or greater
Gain Bandwidth Product: 100 kHz or greater
Current - Input Bias: 1 pA or lower
Voltage - Input Offset: 1.1 mV or lower
Current - Output / Channel: 30 mA or greater
RoHS3 Compliance and MSL Level 1

Substitute parts are grouped into two categories: Direct Substitutes (functionally equivalent with identical or superior electrical performance) and Similar Parts (compatible alternatives with acceptable parameter variations for specific applications).

Parameter Comparison

Parameter	TS27L4CD	TLC27L4ACD	TLC1079CD	TLC1079CDR	TLC1079ID	TLC1079IDR	TLC25L4BCD	TLC25L4CD	TLC274ACD	TLC274ACDR	TLC274AIDR
Manufacturer	STMicroelectronics	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Amplifier Type	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	General Purpose	General Purpose	General Purpose
Number of Circuits	4	4	4	4	4	4	4	4	4	4	4
Slew Rate (V/µs)	0.04	0.05	0.032	0.032	0.032	0.032	0.04	0.04	3.6	3.6	3.6
Gain Bandwidth Product (kHz)	100	110	110	110	110	110	110	110	2200	2200	2200
Current - Input Bias (pA)	1	0.7	1	1	1	1	0.2	0.6	0.6	0.6	0.6
Voltage - Input Offset (mV)	1.1	1.1	0.18	0.18	0.18	0.18	0.34	1.1	0.9	0.9	0.9
Current - Supply (µA, x4 Channels)	10	57	29	29	29	29	2700	2700	2700	2700	2700
Current - Output / Channel (mA)	45	30	30	30	30	30	—	—	30	30	30
Voltage - Supply Span Min (V)	3	3	1.4	1.4	3	3	1.4	1.4	3	3	4
Voltage - Supply Span Max (V)	16	16	16	16	16	16	16	16	16	16	16
Operating Temperature (°C)	0 to 70	0 to 70	0 to 70	0 to 70	-40 to 85	-40 to 85	0 to 70	0 to 70	0 to 70	0 to 70	-40 to 85
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	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	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Last Time Buy	Active	Last Time Buy	Last Time Buy	Active	Last Time Buy	Last Time Buy	Obsolete	Active	Active
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

Direct Substitute - Highest Priority:

TLC27L4ACD (Texas Instruments) is the primary direct substitute for TS27L4CD. This part maintains CMOS amplifier architecture with four circuits in 14-SOIC packaging and operates within the identical supply voltage range (3V to 16V) and temperature range (0°C to 70°C). The TLC27L4ACD demonstrates superior electrical performance with lower input bias current (0.7 pA versus 1 pA) and marginally improved slew rate (0.05V/µs versus 0.04V/µs). Product status is Last Time Buy, indicating continued availability with defined end-of-life support. RoHS3 compliance and MSL Level 1 rating match the original specification.

Compatible Alternatives - Secondary Selection:

TLC1079 series devices (TLC1079CD, TLC1079CDR, TLC1079ID, TLC1079IDR) provide functional compatibility with enhanced electrical characteristics. These parts feature identical four-circuit CMOS architecture in 14-SOIC packaging with superior input offset voltage (180 µV versus 1.1 mV) and lower supply current (29 µA versus 10 µA). The TLC1079IDR variant offers extended operating temperature range (-40°C to 85°C) and Active product status, providing long-term availability assurance. Minimum supply voltage is reduced to 1.4V, enabling operation in lower-voltage applications. All variants maintain RoHS3 compliance and MSL Level 1 rating.

Application-Specific Alternatives:

TLC25L4 series (TLC25L4BCD, TLC25L4CD) are compatible CMOS amplifiers with single-ended output configuration. These devices operate at reduced supply current (2.7 mA versus 10 µA) and support minimum supply voltage of 1.4V. Gain bandwidth product matches the TS27L4CD at 110 kHz. These parts are suitable for low-power applications requiring extended supply voltage range.

TLC274 series (TLC274ACD, TLC274ACDR, TLC274AIDR) are general-purpose operational amplifiers with significantly higher gain bandwidth product (2.2 MHz versus 100 kHz) and slew rate (3.6V/µs versus 0.04V/µs). These devices are appropriate for applications requiring higher frequency response and faster transient performance. TLC274ACDR and TLC274AIDR maintain Active product status with RoHS3 compliance. TLC274AIDR supports extended temperature range (-40°C to 85°C) and requires minimum supply voltage of 4V.

Product Status Considerations:

The TS27L4CD is classified as Obsolete. TLC27L4ACD (Last Time Buy) provides the most direct replacement path with defined production end-of-life. TLC1079IDR and TLC274ACDR maintain Active status, ensuring indefinite availability for long-term production requirements. Selection between Last Time Buy and Active status variants depends on production volume and timeline requirements.

Frequently Asked Questions (FAQ)

Q: Can TLC27L4ACD directly replace TS27L4CD without circuit modification?

A: Yes. TLC27L4ACD is a direct substitute with identical package (14-SOIC), pin configuration, and supply voltage range (3V to 16V). Electrical performance is equivalent or superior across all specified parameters. No circuit modification is required.

Q: What is the primary difference between TLC27L4ACD and TLC1079 series?

A: TLC27L4ACD maintains identical electrical specifications to TS27L4CD with marginal improvements. TLC1079 series offers superior input offset voltage (180 µV versus 1.1 mV) and lower supply current (29 µA versus 10 µA), with extended minimum supply voltage capability (1.4V versus 3V). TLC1079IDR and TLC1079ID support extended operating temperature range (-40°C to 85°C).

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain RoHS3 compliance and MSL Level 1 rating, matching the original TS27L4CD specification.

Q: Which substitute part offers the longest product lifecycle?

A: TLC1079IDR and TLC274ACDR maintain Active product status, indicating indefinite availability. These parts are recommended for applications requiring extended production support beyond Last Time Buy windows.

Q: Can TLC274 series replace TS27L4CD in all applications?

A: TLC274 series provides functional compatibility in 14-SOIC packaging with identical four-circuit configuration. However, TLC274 devices are general-purpose operational amplifiers with significantly higher gain bandwidth product (2.2 MHz) and slew rate (3.6V/µs). These characteristics may introduce stability or noise considerations in applications designed for the lower-bandwidth CMOS amplifier characteristics of TS27L4CD. Application-specific circuit analysis is required.

Q: What is the significance of the 14-SOIC package specification?

A: The 14-SOIC (0.154", 3.90mm Width) package is a standard surface mount configuration. All listed substitute parts utilize identical package dimensions and pin assignments, enabling direct PCB footprint compatibility without layout modification.

Q: How does supply current affect substitute part selection?

A: TS27L4CD operates at 10 µA total supply current (x4 channels). TLC27L4ACD increases to 57 µA, while TLC1079 series operates at 29 µA. TLC25L4 series requires 2.7 mA. For battery-powered or ultra-low-power applications, TLC1079 series provides optimal balance between performance and power consumption. TLC25L4 series is suitable only for applications where higher supply current is acceptable.

Q: Are there packaging format differences among substitute parts?

A: All substitute parts are available in 14-SOIC surface mount package. Packaging formats (Tube, Tape & Reel, Cut Tape) vary by specific part number variant but do not affect electrical compatibility. Selection of packaging format depends on production volume and assembly process requirements.

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