TLC274IDG4 Equivalent & Substitute Parts

Part Overview

The TLC274IDG4 is a general-purpose operational amplifier featuring four independent circuits in a 14-SOIC surface-mount package, manufactured by Texas Instruments. This device is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and production continuity. The TLC274IDG4 operates across a wide supply voltage range (4V to 16V) with moderate slew rate performance (3.6V/µs) and is suitable for general analog signal processing applications requiring low input bias current and offset voltage specifications.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Slew Rate	3.6	V/µs
Gain Bandwidth Product	2.2	MHz
Current - Input Bias	0.6	pA
Voltage - Input Offset	1.1	mV
Current - Supply (x4 Channels)	2.7	mA
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	4	V
Voltage - Supply Span (Max)	16	V
Operating Temperature	-40 to 85	°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 TLC274IDG4 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Package compatibility: 14-SOIC surface-mount form factor (0.154", 3.90mm width)
Circuit count: Four independent amplifier circuits
Supply voltage range: Minimum 4V to maximum 16V operation
Output current capability: Minimum 30mA per channel
Input bias current: Maximum 0.6pA
Input offset voltage: Maximum 1.1mV
Operating temperature range: Minimum -40°C to maximum 85°C

Substitute Categories:

Category 1 - Direct Texas Instruments Equivalent (Active Status): TLC274IDR maintains identical electrical specifications and package configuration as the TLC274IDG4, with the distinction of active product status and alternative packaging format (Cut Tape & Digi-Reel).

Category 2 - STMicroelectronics CMOS Alternatives (Low Power, Reduced Performance): TS27L4AIDT, TS27L4CDT, and TS27L4IDT are CMOS-based amplifiers with four circuits in 14-SO packaging. These devices operate within the 3V to 16V supply range but feature reduced slew rate (0.04V/µs) and gain bandwidth product (100kHz), with significantly lower supply current (10µA vs 2.7mA). Temperature range varies by variant.

Category 3 - STMicroelectronics CMOS Alternatives (Moderate Performance): TS27M4CDT and TS27M4IDT provide intermediate performance characteristics with slew rate of 0.6V/µs and gain bandwidth product of 1MHz, supply current of 150µA, and 14-SO packaging. These devices bridge performance between low-power and general-purpose categories.

All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and identical HTSUS classification.

Parameter Comparison

Parameter	TLC274IDG4	TLC274IDR	TS27L4AIDT	TS27L4CDT	TS27L4IDT	TS27M4CDT	TS27M4IDT
Manufacturer	Texas Instruments	Texas Instruments	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Amplifier Type	General Purpose	General Purpose	CMOS	CMOS	CMOS	CMOS	CMOS
Number of Circuits	4	4	4	4	4	4	4
Slew Rate (V/µs)	3.6	3.6	0.04	0.04	0.04	0.6	0.6
Gain Bandwidth Product (MHz)	2.2	2.2	0.1	0.1	0.1	1	1
Current - Input Bias (pA)	0.6	0.6	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 (mA, x4 Channels)	2.7	2.7	0.01	0.01	0.01	0.15	0.15
Current - Output / Channel (mA)	30	30	45	45	45	45	45
Voltage - Supply Span Min (V)	4	4	3	3	3	3	3
Voltage - Supply Span Max (V)	16	16	16	16	16	16	16
Operating Temperature (°C)	-40 to 85	-40 to 85	-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
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation - TLC274IDR: For applications requiring direct electrical and functional equivalence to the TLC274IDG4, the TLC274IDR is the preferred substitute. This Texas Instruments component maintains identical slew rate (3.6V/µs), gain bandwidth product (2.2MHz), supply current (2.7mA), and input bias current (0.6pA) specifications. The TLC274IDR holds active product status, ensuring long-term availability and supply chain continuity. Both devices operate across the 4V to 16V supply range and support the -40°C to 85°C temperature specification. Packaging format differs (Cut Tape & Digi-Reel vs. standard SOIC), but the 14-SOIC footprint remains identical, requiring no PCB layout modifications.

Secondary Recommendations - STMicroelectronics TS27L4 Series: The TS27L4AIDT and TS27L4IDT variants provide CMOS-based alternatives with extended temperature ranges (-40°C to 125°C for IDT variant). These devices are suitable for applications where reduced power consumption (10µA supply current vs. 2.7mA) is prioritized over dynamic performance. The trade-off involves significantly reduced slew rate (0.04V/µs vs. 3.6V/µs) and gain bandwidth product (100kHz vs. 2.2MHz). These substitutes are appropriate for low-frequency signal conditioning, precision DC amplification, and battery-powered applications. The TS27L4CDT variant operates within the 0°C to 70°C temperature range, limiting its use to commercial-grade applications.

Tertiary Recommendations - STMicroelectronics TS27M4 Series: The TS27M4CDT and TS27M4IDT variants represent intermediate performance CMOS alternatives with slew rate of 0.6V/µs and gain bandwidth product of 1MHz. Supply current consumption (150µA) remains significantly lower than the TLC274IDG4. The TS27M4IDT supports the extended -40°C to 125°C temperature range, while TS27M4CDT is limited to 0°C to 70°C operation. These devices are suitable for applications requiring moderate bandwidth performance with reduced power consumption compared to general-purpose amplifiers.

Compliance and Certification: All substitute parts maintain ROHS3 compliance and MSL Level 1 moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols. No additional environmental or regulatory considerations differentiate the substitute options.

Frequently Asked Questions (FAQ)

Q1: Can TLC274IDR be used as a direct replacement for TLC274IDG4 without circuit modifications?

A: Yes. The TLC274IDR maintains identical electrical specifications including slew rate (3.6V/µs), gain bandwidth product (2.2MHz), supply current (2.7mA per four channels), input bias current (0.6pA), and input offset voltage (1.1mV). Both devices operate across the 4V to 16V supply range and support the -40°C to 85°C temperature specification. The 14-SOIC package footprint is identical, requiring no PCB layout changes. The primary difference is product status (active vs. obsolete) and packaging format (Cut Tape & Digi-Reel vs. standard SOIC).

Q2: What are the key performance trade-offs when substituting with TS27L4 series devices?

A: The TS27L4AIDT, TS27L4CDT, and TS27L4IDT variants reduce slew rate from 3.6V/µs to 0.04V/µs and gain bandwidth product from 2.2MHz to 100kHz. Supply current consumption decreases from 2.7mA to 10µA across four channels. Input bias current increases from 0.6pA to 1pA. These devices are unsuitable for high-frequency or fast-transient applications but excel in low-power, precision DC signal processing. Output current capability increases from 30mA to 45mA per channel.

Q3: Which substitute part supports the widest operating temperature range?

A: Both TS27L4AIDT and TS27M4IDT support the extended temperature range of -40°C to 125°C, exceeding the TLC274IDG4 specification of -40°C to 85°C. The TS27L4CDT and TS27M4CDT variants are limited to 0°C to 70°C operation and are unsuitable for extended temperature applications.

Q4: Are all substitute parts available in identical 14-SOIC packaging?

A: Yes. All substitute parts utilize the 14-SOIC (0.154", 3.90mm width) surface-mount package, maintaining identical PCB footprint compatibility with the TLC274IDG4. Packaging format variations (Cut Tape, Digi-Reel, Tape & Reel) affect supply and handling but do not impact electrical or mechanical compatibility.

Q5: What is the primary advantage of TS27M4 series over TS27L4 series?

A: The TS27M4CDT and TS27M4IDT variants provide higher slew rate (0.6V/µs vs. 0.04V/µs) and gain bandwidth product (1MHz vs. 100kHz) while maintaining significantly lower supply current (150µA vs. 2.7mA) compared to the TLC274IDG4. This intermediate performance profile suits applications requiring moderate bandwidth with reduced power consumption.

Q6: Do all substitute parts maintain ROHS3 compliance?

A: Yes. All substitute parts listed (TLC274IDR, TS27L4AIDT, TS27L4CDT, TS27L4IDT, TS27M4CDT, TS27M4IDT) maintain ROHS3 compliance and MSL Level 1 moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols.

Q7: Which substitute is recommended for battery-powered applications?

A: The TS27L4AIDT or TS27L4IDT variants are optimal for battery-powered applications due to ultra-low supply current consumption (10µA across four channels). The TS27L4IDT variant additionally supports the extended -40°C to 125°C temperature range. These devices sacrifice dynamic performance (slew rate and bandwidth) for power efficiency.

Q8: Can TS27L4CDT be used in applications requiring -40°C operation?

A: No. The TS27L4CDT operates within the 0°C to 70°C temperature range and is unsuitable for extended low-temperature applications. Use TS27L4AIDT or TS27L4IDT for -40°C operation, both supporting -40°C to 125°C range.

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