TLC274MDG4 Equivalent & Substitute Parts

Part Overview

The TLC274MDG4 is a general-purpose operational amplifier integrated circuit manufactured by Texas Instruments, configured as a 4-circuit device in a 14-SOIC surface-mount package. This part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and production continuity. The TLC274MDG4 operates across a wide supply voltage range of 4V to 16V and maintains performance across the industrial temperature range of -55°C to 125°C, making it suitable for general analog signal processing applications.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	TLC274MDG4	—
Manufacturer	Texas Instruments	—
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 Range	-55°C to 125°C	—
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Product Status	Obsolete	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the TLC274MDG4 is determined by the following critical parameters: number of circuits (4), package type (14-SOIC surface mount), supply voltage range compatibility, operating temperature range, and electrical performance characteristics including slew rate, gain bandwidth product, and output current capability.

The substitute parts are grouped into two categories based on electrical performance alignment:

Category 1: Direct Electrical Equivalent (Texas Instruments TLC274MD) This substitute maintains identical electrical specifications to the TLC274MDG4, differing only in packaging format (Tube versus standard packaging). The TLC274MD is the manufacturer-recommended direct equivalent.

Category 2: CMOS Amplifier Alternatives (STMicroelectronics TS27 Series) These substitutes employ CMOS technology and are available in multiple temperature and packaging variants. While they maintain the same 4-circuit configuration and 14-SOIC package footprint, they exhibit different electrical characteristics: lower slew rate (0.04V/µs to 0.6V/µs), lower gain bandwidth product (100 kHz to 1 MHz), significantly lower supply current (10µA to 150µA), and extended output current capability (45 mA). Temperature range variants include industrial (0°C to 70°C) and extended (-40°C to 125°C) options.

Parameter Comparison

Parameter	TLC274MDG4	TLC274MD	TS27L4AIDT	TS27L4CDT	TS27L4IDT	TS27M4CDT	TS27M4IDT
Manufacturer	Texas Instruments	Texas Instruments	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
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 Range	-55°C to 125°C	-55°C to 125°C	-40°C to 125°C	0°C to 70°C	-40°C to 125°C	0°C to 70°C	-40°C to 125°C
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
Product Status	Obsolete	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): The TLC274MD is the manufacturer-recommended substitute for the TLC274MDG4. Both parts are Texas Instruments products with identical electrical specifications and operating characteristics. The TLC274MD is classified as obsolete but maintains full ROHS3 compliance and MSL Level 1 rating. Selection of TLC274MD is appropriate when the original design specifications require preservation of slew rate (3.6V/µs) and gain bandwidth product (2.2 MHz) performance.

For Active Product Alternatives (STMicroelectronics TS27 Series): The TS27 series substitutes are active products with extended product lifecycle support. Selection among TS27L4 and TS27M4 variants depends on application requirements:

TS27L4 variants (TS27L4AIDT, TS27L4CDT, TS27L4IDT) are suitable for applications where lower power consumption is prioritized and bandwidth requirements do not exceed 100 kHz. These parts offer significantly reduced supply current (10µA total) compared to the TLC274MDG4 (2.7mA total).

TS27M4 variants (TS27M4CDT, TS27M4IDT) provide intermediate performance with 1 MHz gain bandwidth product and 0.6V/µs slew rate, consuming 150µA total supply current. These parts bridge the performance gap between low-bandwidth TS27L4 devices and the higher-performance TLC274MDG4.

Temperature range selection among TS27 variants must align with application requirements: industrial range (0°C to 70°C) for TS27L4CDT and TS27M4CDT, or extended range (-40°C to 125°C) for TS27L4IDT and TS27M4IDT to match the TLC274MDG4 operating envelope.

All substitute parts maintain 14-SOIC package compatibility, surface-mount configuration, and ROHS3 compliance with MSL Level 1 rating.

Frequently Asked Questions (FAQ)

Q1: Can the TS27L4CDT directly replace the TLC274MDG4 in all applications?

The TS27L4CDT maintains package and pin compatibility with the TLC274MDG4 in the 14-SOIC configuration. However, electrical performance differs significantly: slew rate is reduced from 3.6V/µs to 0.04V/µs, and gain bandwidth product is reduced from 2.2 MHz to 100 kHz. Direct replacement is only appropriate for applications where these reduced performance parameters are acceptable. Additionally, the TS27L4CDT operating temperature range (0°C to 70°C) is narrower than the TLC274MDG4 (-55°C to 125°C), limiting use in extended temperature environments.

Q2: What is the primary advantage of TS27M4 variants over TS27L4 variants?

The TS27M4 series provides higher slew rate (0.6V/µs versus 0.04V/µs) and higher gain bandwidth product (1 MHz versus 100 kHz), approaching closer to the TLC274MDG4 performance envelope. This enhanced performance is achieved at the cost of increased supply current (150µA versus 10µA total). Selection between TS27L4 and TS27M4 depends on whether bandwidth and slew rate requirements justify the increased power consumption.

Q3: Why does the TLC274MD have the same specifications as the TLC274MDG4 but different part numbers?

The TLC274MD and TLC274MDG4 are both Texas Instruments general-purpose 4-circuit operational amplifiers with identical electrical specifications. The difference in part number designation reflects packaging format variation: TLC274MDG4 uses standard packaging while TLC274MD uses Tube packaging. Both parts are classified as obsolete but remain functionally equivalent for design purposes.

Q4: Are all substitute parts ROHS3 compliant?

All substitute parts listed (TLC274MD, TS27L4AIDT, TS27L4CDT, TS27L4IDT, TS27M4CDT, TS27M4IDT) are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating. This ensures compatibility with modern manufacturing processes and environmental regulations.

Q5: Which substitute part is recommended for applications requiring the widest operating temperature range?

Both the TLC274MD and TS27L4IDT / TS27M4IDT support the extended temperature range of -40°C to 125°C. The TLC274MD maintains the original -55°C to 125°C range. For applications requiring operation below -40°C, the TLC274MD is the only listed substitute supporting the full -55°C lower limit. For applications limited to -40°C to 125°C, the TS27M4IDT provides active product status with intermediate performance characteristics.

Q6: What packaging options are available for the substitute parts?

Substitute parts are available in multiple packaging formats: TLC274MD (Tube), TS27L4AIDT (Tape & Reel), TS27L4CDT (Cut Tape), TS27L4IDT (Cut Tape & Digi-Reel), TS27M4CDT (Cut Tape & Digi-Reel), and TS27M4IDT (Cut Tape). All maintain the 14-SOIC surface-mount package footprint. Packaging selection should align with production volume and assembly process requirements.

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