TLC274MDR Equivalent & Substitute Parts

Part Overview

The TLC274MDR is a general-purpose operational amplifier manufactured by Texas Instruments, configured as a 4-circuit integrated circuit in 14-SOIC surface mount packaging. This device is classified as obsolete, indicating discontinued production and limited availability for new designs. The TLC274MDR operates across a wide supply voltage range (4V to 16V) and temperature range (-55°C to 125°C), making it suitable for industrial and extended-temperature applications.

Due to its obsolete status, identifying functionally equivalent substitute parts is essential for design continuity, production support, and long-term component sourcing. Substitute parts must maintain compatibility across electrical performance parameters, mechanical packaging, and operational specifications to ensure direct replacement capability.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	TLC274MDR	—
Manufacturer	Texas Instruments	—
Category	Linear, Amplifiers	—
Amplifier Type	General Purpose	—
Number of Circuits	4	—
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
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	2.7 (x4 Channels)	mA
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	4	V
Voltage - Supply Span (Max)	16	V
Operating Temperature	-55°C ~ 125°C	—
Product Status	Obsolete	—
RoHS Status	RoHS non-compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the TLC274MDR are selected based on strict electrical and mechanical compatibility criteria. All substitute candidates must satisfy the following requirements:

Mandatory Compatibility Criteria:

Package type: 14-SOIC surface mount configuration
Number of circuits: 4 operational amplifiers per package
Supply voltage range: Minimum 4V to maximum 16V (or compatible subset)
Output current per channel: Minimum 30 mA
Input bias current: 1 pA or lower
Voltage input offset: 1.1 mV or lower
Mounting type: Surface mount

Substitution Logic: Substitute parts are grouped into two categories based on performance characteristics:

Category 1 - Higher Performance Substitutes (TS274IDT): These parts exceed the electrical specifications of the TLC274MDR while maintaining full package and pin compatibility. They feature improved slew rate (5.5V/µs vs. 3.6V/µs), higher gain bandwidth product (3.5 MHz vs. 2.2 MHz), and reduced supply current (1 mA vs. 2.7 mA). These substitutes are suitable for applications requiring enhanced performance margins.

Category 2 - Low-Power Substitutes (TS27L4CDT, TS27L4AIDT, TS27L4IDT): These parts feature significantly reduced supply current (10 µA vs. 2.7 mA) and lower slew rate (0.04V/µs vs. 3.6V/µs). They are suitable for low-power applications where bandwidth requirements are modest. Operating temperature ranges vary: TS27L4CDT operates 0°C to 70°C, while TS27L4AIDT and TS27L4IDT operate -40°C to 125°C.

Category 3 - Mid-Range Substitutes (TS27M4CDT, TS27M4IDT): These parts provide intermediate performance with slew rate of 0.6V/µs, gain bandwidth product of 1 MHz, and supply current of 150 µA. Operating temperature ranges are 0°C to 70°C (TS27M4CDT) and -40°C to 125°C (TS27M4IDT).

All substitute parts are manufactured by STMicroelectronics and carry active product status with RoHS3 compliance, addressing the obsolescence and compliance limitations of the original TLC274MDR.

Parameter Comparison

Parameter	TLC274MDR	TS274IDT	TS27L4CDT	TS27L4AIDT	TS27L4IDT	TS27M4CDT	TS27M4IDT
Manufacturer	Texas Instruments	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Amplifier Type	General Purpose	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS
Number of Circuits	4	4	4	4	4	4	4
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
Slew Rate (V/µs)	3.6	5.5	0.04	0.04	0.04	0.6	0.6
Gain Bandwidth Product (MHz)	2.2	3.5	0.1	0.1	0.1	1	1
Current - Input Bias (pA)	0.6	1	1	1	1	1	1
Voltage - Input Offset (mV)	1.1	1.1	1.1	0.9	1.1	1.1	1.1
Current - Supply (mA)	2.7	1	0.01	0.01	0.01	0.15	0.15
Current - Output / Channel (mA)	30	45	45	45	45	45	45
Voltage - Supply Span (Min - Max)	4 - 16 V	3 - 16 V	3 - 16 V	3 - 16 V	3 - 16 V	3 - 16 V	3 - 16 V
Operating Temperature	-55°C ~ 125°C	-40°C ~ 125°C	0°C ~ 70°C	-40°C ~ 125°C	-40°C ~ 125°C	0°C ~ 70°C	-40°C ~ 125°C
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement with Enhanced Performance: The TS274IDT is the primary recommended substitute for the TLC274MDR. This part maintains full electrical and mechanical compatibility while offering superior performance characteristics. The TS274IDT features active product status, ensuring long-term availability and supply chain stability. RoHS3 compliance addresses regulatory requirements for new designs. The improved slew rate (5.5V/µs) and gain bandwidth product (3.5 MHz) provide performance headroom for existing circuit designs. Reduced supply current (1 mA vs. 2.7 mA) offers additional power efficiency benefits. Operating temperature range (-40°C to 125°C) covers the majority of industrial applications, though it does not extend to the -55°C minimum of the original part.

For Extended Temperature Range Applications: Applications requiring the full -55°C to 125°C operating range of the TLC274MDR cannot be directly substituted with any of the listed alternatives, as all STMicroelectronics substitutes have a minimum operating temperature of -40°C or 0°C. In such cases, design review and alternative sourcing strategies are necessary.

For Low-Power Applications: The TS27L4CDT, TS27L4AIDT, and TS27L4IDT are suitable for applications where power consumption is critical. These parts reduce supply current by approximately 270-fold compared to the TLC274MDR (10 µA vs. 2.7 mA). However, the significantly reduced slew rate (0.04V/µs vs. 3.6V/µs) and gain bandwidth product (100 kHz vs. 2.2 MHz) restrict their use to low-frequency signal conditioning and precision measurement applications. Temperature range selection is critical: TS27L4CDT operates 0°C to 70°C, while TS27L4AIDT and TS27L4IDT extend to -40°C to 125°C.

For Mid-Range Performance and Power: The TS27M4CDT and TS27M4IDT provide intermediate characteristics with slew rate of 0.6V/µs and gain bandwidth product of 1 MHz. Supply current of 150 µA represents a 18-fold reduction compared to the TLC274MDR. These parts are suitable for general-purpose applications where bandwidth requirements are moderate. Temperature range selection follows the same pattern: TS27M4CDT operates 0°C to 70°C, while TS27M4IDT extends to -40°C to 125°C.

Compliance Considerations: All STMicroelectronics substitute parts carry RoHS3 compliance, addressing environmental and regulatory requirements. The TLC274MDR is RoHS non-compliant, making substitution necessary for applications subject to RoHS directives. All parts maintain MSL Level 1 (Unlimited) moisture sensitivity, ensuring consistent handling and storage requirements.

Frequently Asked Questions (FAQ)

Q1: Can the TS274IDT be used as a direct pin-for-pin replacement for the TLC274MDR?

A: Yes. Both parts are configured as 4-circuit operational amplifiers in 14-SOIC surface mount packages with identical pinouts. The TS274IDT maintains electrical compatibility across all critical parameters: supply voltage range (3V to 16V encompasses the TLC274MDR's 4V to 16V requirement), input offset voltage (1.1 mV), input bias current (1 pA), and output current per channel (45 mA exceeds the 30 mA requirement). Direct substitution is mechanically and electrically feasible.

Q2: What is the primary limitation when substituting the TLC274MDR with STMicroelectronics alternatives?

A: Operating temperature range is the primary limitation. The TLC274MDR operates from -55°C to 125°C, while all STMicroelectronics substitutes have minimum operating temperatures of either -40°C or 0°C. Applications requiring operation below -40°C cannot use these substitutes without design modification or alternative component sourcing.

Q3: Why do the TS27L4 series parts have such low supply current compared to the TLC274MDR?

A: The TS27L4 series is specifically designed for ultra-low-power applications. Supply current of 10 µA (versus 2.7 mA for the TLC274MDR) is achieved through CMOS process technology and optimized circuit design. This reduction comes with trade-offs in slew rate (0.04V/µs vs. 3.6V/µs) and gain bandwidth product (100 kHz vs. 2.2 MHz), limiting these parts to low-frequency applications.

Q4: Are there differences in packaging between the TLC274MDR and substitute parts?

A: All parts use 14-SOIC surface mount packaging with identical physical dimensions (0.154" width, 3.90mm). Packaging differences exist only in delivery format: the TLC274MDR is specified as standard packaging, while substitutes are available in Tape & Reel (TR) or Cut Tape (CT) formats. These delivery format differences do not affect component functionality or compatibility.

Q5: Which substitute part should be selected for a new design requiring RoHS compliance?

A: Any of the STMicroelectronics substitutes (TS274IDT, TS27L4CDT, TS27L4AIDT, TS27L4IDT, TS27M4CDT, TS27M4IDT) carry RoHS3 compliance. Selection should be based on performance requirements: TS274IDT for general-purpose applications requiring performance comparable to or exceeding the TLC274MDR, TS27L4 series for ultra-low-power applications, or TS27M4 series for mid-range performance and power consumption.

Q6: What is the significance of the different temperature grades (TS27L4CDT vs. TS27L4AIDT vs. TS27L4IDT)?

A: Temperature grade designations indicate the qualified operating temperature range. TS27L4CDT operates 0°C to 70°C (commercial grade), TS27L4AIDT operates -40°C to 125°C (automotive/industrial grade), and TS27L4IDT operates -40°C to 125°C (industrial grade). Selection depends on application environment: commercial-grade parts are suitable for standard operating conditions, while automotive and industrial grades are required for extended temperature applications.

Q7: Can the TS27L4 series be used in high-frequency signal processing applications?

A: No. The TS27L4 series has a gain bandwidth product of only 100 kHz, making it unsuitable for high-frequency applications. The TLC274MDR has a gain bandwidth product of 2.2 MHz, and the TS274IDT offers 3.5 MHz. For applications requiring bandwidth above 100 kHz, the TS274IDT or TS27M4 series (1 MHz) should be selected.

Q8: What inventory considerations should be evaluated when selecting a substitute?

A: Current inventory levels vary significantly among substitutes. TS27L4CDT has the highest inventory (30,200 pcs), followed by TS27L4IDT (23,400 pcs) and TS274IDT (10,534 pcs). For applications requiring immediate availability or large production volumes, parts with higher inventory levels provide supply chain advantages. The original TLC274MDR has 2,200 pcs available but is obsolete, making long-term sourcing uncertain.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message