TLC274CDG4 Equivalent & Substitute Parts

Part Overview

The TLC274CDG4 is a general-purpose operational amplifier integrated circuit manufactured by Texas Instruments, configured as a 4-circuit device in 14-SOIC surface mount packaging. This component is classified as obsolete, indicating discontinued production and limited availability in the original configuration. The identification of equivalent and substitute parts is necessary to maintain design continuity, ensure project feasibility, and provide alternative sourcing options for applications requiring general-purpose amplification with the specified electrical and mechanical characteristics.

Key Parameters

Parameter	Value	Unit
Manufacturer Part Number	TLC274CDG4	—
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)	3	V
Voltage - Supply Span (Max)	16	V
Operating Temperature	0 to 70	°C
Mounting Type	Surface Mount	—
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
Product Status	Obsolete	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the TLC274CDG4 is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

Number of circuits: 4 (mandatory)
Package type: 14-SOIC surface mount (mandatory)
Voltage supply span: 3 V to 16 V (mandatory)
Mounting type: Surface mount (mandatory)

Secondary Compatibility Parameters:

Slew rate: 3.6 V/µs (TLC274CDG4 baseline)
Gain bandwidth product: 2.2 MHz (TLC274CDG4 baseline)
Current supply per channel group: 2.7 mA (TLC274CDG4 baseline)
Output current per channel: 30 mA (TLC274CDG4 baseline)
Operating temperature range: 0°C to 70°C (TLC274CDG4 baseline)

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

Category A - Direct Electrical Equivalents (Texas Instruments TLC274 Series): Parts TLC274CD and TLC274CDR maintain identical electrical specifications to the main part, differing only in packaging format (tube versus cut tape/digi-reel). These substitutes preserve all performance characteristics including slew rate, gain bandwidth product, and supply current.

Category B - Functional Equivalents with Performance Variations (STMicroelectronics TS27 Series): Parts TS27L4CDT, TS27L4AIDT, TS27L4IDT, TS27M4CDT, and TS27M4IDT are CMOS-based alternatives that maintain the 4-circuit, 14-SOIC configuration and supply voltage range but exhibit different electrical performance profiles. These parts are suitable for applications where the specific slew rate and bandwidth characteristics of the TLC274CDG4 are not critical design constraints.

Parameter Comparison

Parameter	TLC274CDG4	TLC274CD	TLC274CDR	TS27L4CDT	TS27L4AIDT	TS27L4IDT	TS27M4CDT	TS27M4IDT
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Amplifier Type	General Purpose	General Purpose	General Purpose	CMOS	CMOS	CMOS	CMOS	CMOS
Number of Circuits	4	4	4	4	4	4	4	4
Slew Rate (V/µs)	3.6	3.6	3.6	0.04	0.04	0.04	0.6	0.6
Gain Bandwidth Product (MHz)	2.2	2.2	2.2	0.1	0.1	0.1	1	1
Current - Input Bias (pA)	0.6	0.6	0.6	1	1	1	1	1
Voltage - Input Offset (mV)	1.1	1.1	1.1	1.1	0.9	1.1	1.1	1.1
Current - Supply (mA, x4 Channels)	2.7	2.7	2.7	0.01	0.01	0.01	0.15	0.15
Current - Output / Channel (mA)	30	30	30	45	45	45	45	45
Voltage - Supply Span (V)	3 to 16	3 to 16	3 to 16	3 to 16	3 to 16	3 to 16	3 to 16	3 to 16
Operating Temperature (°C)	0 to 70	0 to 70	0 to 70	0 to 70	-40 to 125	-40 to 125	0 to 70	-40 to 125
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Product Status	Obsolete	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1	1	1	1	1	1	1	1

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

TLC274CDR is the recommended primary substitute. This part maintains complete electrical equivalence to the TLC274CDG4 while offering active product status, ensuring continued availability and manufacturing support. The TLC274CDR is supplied in cut tape and digi-reel packaging formats with 25,200 units in current inventory, providing reliable sourcing for production and prototyping applications. Both parts are ROHS3 compliant with MSL 1 rating, ensuring compatibility with standard assembly processes.

TLC274CD is an alternative direct equivalent supplied in tube packaging format. This part is classified as obsolete, matching the status of the main part, and should be considered only when tube packaging is specifically required for handling or storage procedures.

For Performance-Variant Substitution (CMOS Technology):

TS27L4CDT and TS27L4IDT are low-power CMOS alternatives suitable for applications where reduced supply current is advantageous. These parts operate at 10 µA total supply current compared to 2.7 mA for the TLC274CDG4, representing a 270-fold reduction in power consumption. However, slew rate is reduced to 0.04 V/µs and gain bandwidth product to 100 kHz. These characteristics are appropriate for low-frequency signal conditioning, sensor interfaces, and battery-powered applications where bandwidth requirements do not exceed 100 kHz.

TS27L4AIDT provides extended operating temperature range (-40°C to 125°C) with identical electrical specifications to TS27L4CDT, suitable for industrial and automotive temperature environments.

TS27M4CDT and TS27M4IDT offer intermediate performance between the low-bandwidth TS27L4 series and the high-performance TLC274CDG4. These parts provide 0.6 V/µs slew rate and 1 MHz gain bandwidth product with 150 µA supply current per channel group. These characteristics are appropriate for audio-frequency applications, precision measurement circuits, and general-purpose signal processing where moderate bandwidth and power efficiency are balanced requirements.

TS27M4IDT provides extended operating temperature range (-40°C to 125°C) with identical electrical specifications to TS27M4CDT.

All substitute parts maintain the 14-SOIC package format, 3 V to 16 V supply voltage range, and ROHS3 compliance, ensuring mechanical and regulatory compatibility with the original design.

Frequently Asked Questions (FAQ)

Q1: Can TLC274CD be used as a direct replacement for TLC274CDG4?

A: Yes. TLC274CD is electrically identical to TLC274CDG4, with all performance parameters matching exactly: 3.6 V/µs slew rate, 2.2 MHz gain bandwidth product, 2.7 mA supply current, and 30 mA output current per channel. The only difference is packaging format (tube versus digi-reel). Both parts are classified as obsolete. Selection between these parts depends on packaging requirements for your assembly process.

Q2: What is the primary advantage of TLC274CDR over TLC274CDG4?

A: TLC274CDR maintains complete electrical equivalence while offering active product status, indicating ongoing manufacturing and availability. With 25,200 units in inventory, TLC274CDR provides superior sourcing reliability compared to the obsolete TLC274CDG4. All electrical specifications, package format, and compliance certifications are identical.

Q3: When should TS27L4CDT be selected instead of TLC274CDG4?

A: TS27L4CDT is appropriate when power consumption is a critical design parameter. This part operates at 10 µA total supply current, approximately 270 times lower than TLC274CDG4. However, slew rate is reduced to 0.04 V/µs and gain bandwidth product to 100 kHz. Selection of TS27L4CDT requires confirmation that your application does not require bandwidth exceeding 100 kHz and that the reduced slew rate does not compromise signal fidelity.

Q4: What is the difference between TS27L4CDT and TS27M4CDT?

A: Both parts are CMOS amplifiers in 14-SOIC packaging with identical supply voltage range and output current capability. TS27L4CDT operates at 10 µA supply current with 0.04 V/µs slew rate and 100 kHz bandwidth. TS27M4CDT operates at 150 µA supply current with 0.6 V/µs slew rate and 1 MHz bandwidth. TS27M4CDT provides 10 times greater bandwidth and 6 times faster slew rate at the cost of 15 times higher supply current. Selection depends on whether your application requires the higher performance of TS27M4CDT or the lower power consumption of TS27L4CDT.

Q5: Are all substitute parts compatible with the 14-SOIC package footprint of TLC274CDG4?

A: Yes. All substitute parts listed are specified for 14-SOIC (0.154", 3.90mm width) surface mount packaging. PCB footprints and assembly processes designed for TLC274CDG4 are directly compatible with all substitute parts without modification.

Q6: Do the substitute parts meet the same compliance requirements as TLC274CDG4?

A: Yes. All substitute parts are ROHS3 compliant and carry MSL 1 (unlimited moisture sensitivity level) rating, matching the compliance profile of TLC274CDG4. All parts are classified as REACH unaffected and carry ECCN EAR99 designation.

Q7: Which substitute part offers the widest operating temperature range?

A: TS27L4AIDT and TS27M4IDT both provide -40°C to 125°C operating temperature range, compared to 0°C to 70°C for TLC274CDG4. These parts are suitable for industrial, automotive, and extended-temperature applications. TS27L4AIDT maintains the low-power characteristics of the TS27L4 series, while TS27M4IDT provides intermediate performance between low-power and high-performance configurations.

Q8: Can TLC274CDG4 be replaced in a high-frequency application requiring 2 MHz bandwidth?

A: TLC274CDR is the appropriate substitute, maintaining 2.2 MHz gain bandwidth product. TS27M4CDT and TS27M4IDT provide 1 MHz bandwidth, which may be insufficient. TS27L4 series parts provide only 100 kHz bandwidth and are not suitable for 2 MHz applications. Confirm that your application does not require slew rate exceeding 3.6 V/µs, as this parameter is not exceeded by any substitute part.

Q9: What inventory status should influence my selection between substitute parts?

A: TLC274CDR offers the highest inventory availability with 25,200 units in stock, providing the most reliable sourcing for production applications. TS27L4CDT provides 30,200 units, TS27L4IDT provides 23,400 units, and TS27M4IDT provides 7,910 units. TLC274CD and TS27M4CDT offer lower inventory levels (1,753 and 5,450 units respectively). For long-term production programs, TLC274CDR and TS27L4CDT are preferred based on inventory depth.

Q10: Are there any electrical performance parameters where substitute parts exceed TLC274CDG4 specifications?

A: Yes. All substitute parts provide higher output current capability (45 mA per channel versus 30 mA for TLC274CDG4). TS27L4AIDT provides lower input offset voltage (0.9 mV versus 1.1 mV). These parameters represent improvements and do not create compatibility issues. All other electrical parameters in substitute parts are either identical or reduced compared to TLC274CDG4.

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