TLC279ID CMOS Amplifier 4 Circuit Equivalent & Substitute Parts

Part Overview

The TLC279ID is a CMOS operational amplifier integrated circuit manufactured by Texas Instruments, configured as a 4-circuit amplifier in a 14-SOIC surface mount package. This device is classified as Last Time Buy, indicating discontinued production with limited inventory availability. The TLC279ID operates across a supply voltage range of 4V to 16V and is suitable for low-power CMOS amplifier applications requiring moderate bandwidth performance. Due to its Last Time Buy status, identification of functionally equivalent substitute components is necessary for design continuity and long-term supply chain planning.

Key Parameters

Parameter	Value	Unit
Amplifier Type	CMOS	—
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	320	µV
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	—

Substitute Part Grouping Explanation

Substitution of the TLC279ID is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Number of circuits: 4 (mandatory)
Package type: 14-SOIC surface mount (mandatory)
Amplifier type: CMOS (preferred for direct substitution)
Supply voltage range: Minimum 4V, Maximum 16V (mandatory overlap)
Operating temperature range: Must encompass or exceed -40°C to 85°C
Slew rate: 3.6V/µs or greater (performance requirement)
Gain bandwidth product: 2.2 MHz or greater (performance requirement)

Substitute Categories:

Category A - Direct Electrical Equivalents (CMOS Type, High Performance): TLC279IDR maintains identical electrical specifications to the main part with different packaging (Tape & Reel instead of Tube). This represents a direct substitution with Active product status.

Category B - CMOS Alternatives (Lower Bandwidth, Ultra-Low Power): TS27L4CDT, TS27L4AIDT, TS27L4IDT represent CMOS amplifiers with reduced slew rate (0.04V/µs) and bandwidth (100 kHz), but maintain the 4-circuit configuration and 14-SOIC package. These are suitable only for applications not requiring the higher performance specifications of the TLC279ID.

Category C - CMOS Alternatives (Moderate Bandwidth, Low Power): TS27M4CDT and TS27M4IDT provide intermediate performance with 0.6V/µs slew rate and 1 MHz bandwidth, with significantly reduced supply current (150µA vs 2.7mA).

Category D - General Purpose Alternative (Non-CMOS, Rail-to-Rail): NCS20074DR2G is a general-purpose amplifier with rail-to-rail output, wider supply range (2.7V to 36V), and higher output current capability (65mA vs 30mA). This part differs in amplifier type and performance characteristics but maintains 4-circuit configuration and 14-SOIC package.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Supply Current (mA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Packaging	Product Status
TLC279ID	Texas Instruments	CMOS	3.6	2.2	0.6	2.7	30	4	16	-40 to 85	Tube	Last Time Buy
TLC279IDR	Texas Instruments	CMOS	3.6	2.2	0.6	2.7	30	4	16	-40 to 85	Tape & Reel	Active
NCS20074DR2G	onsemi	General Purpose	2.4	3.2	5	0.42	65	2.7	36	-40 to 125	Cut Tape & Digi-Reel	Active
TS27L4AIDT	STMicroelectronics	CMOS	0.04	0.1	1	0.01	45	3	16	-40 to 125	Tape & Reel	Active
TS27L4CDT	STMicroelectronics	CMOS	0.04	0.1	1	0.01	45	3	16	0 to 70	Cut Tape	Active
TS27L4IDT	STMicroelectronics	CMOS	0.04	0.1	1	0.01	45	3	16	-40 to 125	Cut Tape & Digi-Reel	Active
TS27M4CDT	STMicroelectronics	CMOS	0.6	1	1	0.15	45	3	16	0 to 70	Cut Tape & Digi-Reel	Active
TS27M4IDT	STMicroelectronics	CMOS	0.6	1	1	0.15	45	3	16	-40 to 125	Cut Tape	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): TLC279IDR is the primary substitute for TLC279ID. Both parts are manufactured by Texas Instruments with identical electrical specifications. The only difference is packaging format: TLC279IDR is supplied in Tape & Reel format versus Tube for the original part. TLC279IDR maintains Active product status, ensuring continued availability and supply chain stability. This substitution requires no circuit redesign or performance verification.

For Active Product Status with CMOS Architecture: When TLC279IDR availability is constrained, TS27M4IDT provides an alternative CMOS amplifier with Active status and extended operating temperature range (-40°C to 125°C). However, this part exhibits reduced slew rate (0.6V/µs vs 3.6V/µs) and lower gain bandwidth product (1 MHz vs 2.2 MHz). Selection of TS27M4IDT is appropriate only for applications where the reduced performance specifications do not impact circuit function.

For Extended Supply Voltage Range: NCS20074DR2G from onsemi provides the widest supply voltage range (2.7V to 36V) and highest output current capability (65mA vs 30mA). This part is classified as general-purpose amplifier rather than CMOS type. NCS20074DR2G is suitable for applications requiring rail-to-rail output capability and extended supply flexibility, with the trade-off of slightly lower slew rate (2.4V/µs).

For Ultra-Low Power Applications: TS27L4IDT offers the lowest supply current consumption (10µA vs 2.7mA) with extended temperature range (-40°C to 125°C). This part is appropriate only for applications where bandwidth requirements are minimal (100 kHz maximum). The significantly reduced slew rate (0.04V/µs) and gain bandwidth product (100 kHz) restrict this part to low-frequency signal processing.

Compliance and Certification: All substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and REACH Unaffected status, matching the regulatory profile of the original TLC279ID.

Frequently Asked Questions (FAQ)

Q1: Can TLC279IDR be used as a direct replacement for TLC279ID without circuit modification?

A: Yes. TLC279IDR is electrically identical to TLC279ID with all specifications matching exactly. The only difference is packaging format (Tape & Reel versus Tube). No circuit redesign, component value changes, or performance verification is required. TLC279IDR maintains Active product status, providing superior long-term supply availability compared to the Last Time Buy TLC279ID.

Q2: What are the key performance differences between TLC279ID and the STMicroelectronics TS27 series alternatives?

A: The TS27L4 series (TS27L4CDT, TS27L4AIDT, TS27L4IDT) provides ultra-low power operation (10µA supply current) but with significantly reduced bandwidth (100 kHz vs 2.2 MHz) and slew rate (0.04V/µs vs 3.6V/µs). The TS27M4 series (TS27M4CDT, TS27M4IDT) offers intermediate performance with 1 MHz bandwidth and 0.6V/µs slew rate, consuming 150µA supply current. Selection depends on whether the application requires the higher performance of the TLC279ID or can operate with reduced bandwidth and slew rate specifications.

Q3: Is NCS20074DR2G from onsemi a suitable substitute for the TLC279ID?

A: NCS20074DR2G is functionally compatible in terms of 4-circuit configuration and 14-SOIC package, but differs in amplifier type (general-purpose versus CMOS) and performance characteristics. NCS20074DR2G provides higher output current (65mA vs 30mA), wider supply range (2.7V to 36V), and rail-to-rail output capability. However, it exhibits lower slew rate (2.4V/µs vs 3.6V/µs) and higher input bias current (5pA vs 0.6pA). This part is suitable for applications requiring extended supply voltage range or higher output current, but not for direct performance-matched substitution.

Q4: What is the significance of the Last Time Buy status for TLC279ID?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of TLC279ID and will not accept new orders beyond a specified cutoff date. Existing inventory is limited (3100 pieces noted). This status necessitates identification of substitute parts for new designs or long-term production requirements. TLC279IDR, with identical specifications and Active status, is the recommended transition path.

Q5: Are all substitute parts available in the same 14-SOIC package?

A: Yes. All substitute parts listed are configured in 14-SOIC (0.154", 3.90mm Width) surface mount packages, ensuring mechanical and footprint compatibility with TLC279ID. Packaging format variations (Tube, Tape & Reel, Cut Tape) affect supply and handling but not circuit board integration.

Q6: Which substitute part provides the best long-term supply availability?

A: TLC279IDR from Texas Instruments is the optimal choice for supply continuity. It maintains Active product status with 3600 pieces in inventory, identical electrical specifications to TLC279ID, and manufacturer support. All STMicroelectronics alternatives (TS27L4 and TS27M4 series) and the onsemi NCS20074DR2G also maintain Active status with substantial inventory levels, providing multiple sourcing options if TLC279IDR becomes constrained.

Q7: Can TS27L4CDT be used in applications originally designed for TLC279ID?

A: TS27L4CDT is mechanically compatible but electrically limited for direct substitution. Its 100 kHz bandwidth and 0.04V/µs slew rate are significantly lower than TLC279ID specifications (2.2 MHz and 3.6V/µs). TS27L4CDT is suitable only for low-frequency applications where reduced bandwidth does not impact performance. Additionally, TS27L4CDT operating temperature range is 0°C to 70°C, which does not extend to the -40°C minimum of TLC279ID.

Q8: What is the temperature range consideration when selecting a substitute?

A: TLC279ID operates from -40°C to 85°C. Substitute parts vary: TLC279IDR matches this range exactly. TS27L4CDT and TS27M4CDT are limited to 0°C to 70°C, which is narrower. TS27L4AIDT, TS27L4IDT, TS27M4IDT, and NCS20074DR2G extend to -40°C to 125°C or -40°C to 125°C, providing equal or superior temperature coverage. Selection must ensure the substitute part's temperature range encompasses the application's operating environment.

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