TLC277CDG4 Equivalent & Substitute Parts

Part Overview

The TLC277CDG4 is a CMOS dual-channel operational amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device belongs to the LinCMOS™ series and is classified as obsolete. The TLC277CDG4 is designed for low-power, general-purpose amplification applications requiring dual-channel configurations with CMOS input characteristics.

Due to its obsolete product status, direct procurement of the TLC277CDG4 may face supply constraints. Equivalent and substitute parts are available from both Texas Instruments and STMicroelectronics that maintain electrical and mechanical compatibility while offering improved availability and, in some cases, enhanced performance characteristics.

Key Parameters

Parameter	Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	2	—
Slew Rate	5.3	V/µs
Gain Bandwidth Product	2.2	MHz
Current - Input Bias	0.7	pA
Voltage - Input Offset	1.1	mV
Current - Supply (per Channel)	1.9	mA
Current - Output / Channel	30	mA
Voltage - Supply Span (Min)	3	V
Voltage - Supply Span (Max)	16	V
Operating Temperature	0 to 70	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the TLC277CDG4 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Amplifier Type: CMOS
Number of Circuits: 2
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Voltage - Supply Span: 3 V (Min) to 16 V (Max)
Current - Output / Channel: 30 mA or greater

Secondary Compatibility Parameters:

Slew Rate: 5.3 V/µs or greater
Gain Bandwidth Product: 2.2 MHz or greater
Current - Input Bias: 0.7 pA or lower
Voltage - Input Offset: 1.1 mV or lower
Current - Supply: 1.9 mA per channel or lower

Substitute parts are grouped into two categories:

Category 1: Texas Instruments Direct Equivalents (TLC277 Base Series) These parts maintain identical electrical specifications and differ only in packaging format or product status. They are sourced from the same manufacturer and series.

Category 2: STMicroelectronics Cross-Substitutes (TS272 and TS27L2 Series) These parts meet or exceed all primary substitution criteria and maintain mechanical compatibility. They offer enhanced performance in specific parameters (higher slew rate, higher gain bandwidth product, lower supply current) while remaining within the same package footprint and supply voltage range.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (mV)	Supply Current (mA)	Output Current (mA)	Supply Voltage (V)	Temp Range (°C)	Product Status
TLC277CDG4	Texas Instruments	CMOS	5.3	2.2	0.7	1.1	1.9	30	3–16	0 to 70	Obsolete
TLC277CD	Texas Instruments	CMOS	5.3	2.2	0.7	1.1	1.9	30	3–16	0 to 70	Last Time Buy
TLC277CDR	Texas Instruments	CMOS	5.3	2.2	0.7	1.1	1.9	30	3–16	0 to 70	Active
TS272ACDT	STMicroelectronics	CMOS	5.5	3.5	1	0.9	1	45	3–16	0 to 70	Active
TS272AIDT	STMicroelectronics	CMOS	5.5	3.5	1	0.9	1	45	3–16	−40 to 125	Active
TS272BIDT	STMicroelectronics	CMOS	5.5	3.5	1	0.25	1	45	3–16	−40 to 125	Active
TS272CDT	STMicroelectronics	CMOS	5.5	3.5	1	1.1	1	45	3–16	0 to 70	Active
TS272IDT	STMicroelectronics	CMOS	5.5	3.5	1	1.1	1	45	3–16	−40 to 125	Active
TS27L2ACDT	STMicroelectronics	CMOS	0.04	0.1	1	0.9	0.01	45	3–16	0 to 70	Active
TS27L2AIDT	STMicroelectronics	CMOS	0.04	0.1	1	1.1	0.01	45	3–16	−40 to 125	Active
LM432MA/NOPB	Texas Instruments	General Purpose	—	1	3	0.6	0.15	30	2.5–16	−40 to 85	Obsolete

Engineering Selection Recommendations

Primary Recommendation: TLC277CDR

The TLC277CDR is the preferred substitute for the TLC277CDG4. This part is manufactured by Texas Instruments, maintains identical electrical specifications, and carries an Active product status. The TLC277CDR is supplied in Cut Tape (CT) & Digi-Reel® packaging format with 3142 units currently in stock. This part is fully compatible with existing designs without modification and provides the highest supply reliability.

Secondary Recommendation: TS272CDT or TS272IDT

The TS272CDT and TS272IDT are STMicroelectronics alternatives that exceed the electrical performance of the TLC277CDG4 while maintaining mechanical compatibility. Both parts feature:

Higher slew rate (5.5 V/µs vs. 5.3 V/µs)
Higher gain bandwidth product (3.5 MHz vs. 2.2 MHz)
Lower supply current (1 mA vs. 1.9 mA per channel)
Higher output current capability (45 mA vs. 30 mA)

The TS272CDT operates within the original temperature range (0°C to 70°C), while the TS272IDT extends operation to −40°C to 125°C. Both are Active products with substantial inventory availability (17,007 and 21,553 units respectively).

Alternative for Extended Temperature Range: TS272AIDT or TS272BIDT

For applications requiring extended operating temperature range (−40°C to 125°C), the TS272AIDT or TS272BIDT provide identical electrical performance to the TS272CDT/TS272IDT with enhanced temperature specifications. The TS272BIDT offers superior input offset voltage (0.25 mV vs. 0.9–1.1 mV).

Low-Power Alternative: TS27L2ACDT or TS27L2AIDT

For applications where supply current minimization is critical, the TS27L2 series reduces supply current to 10 µA per channel (vs. 1.9 mA for the TLC277CDG4). However, this substitution is appropriate only when slew rate and gain bandwidth product requirements can be reduced to 0.04 V/µs and 100 kHz respectively.

Not Recommended: LM432MA/NOPB

The LM432MA/NOPB is a general-purpose amplifier with significantly lower gain bandwidth product (1 MHz vs. 2.2 MHz) and higher input bias current (3 nA vs. 0.7 pA). This part is classified as obsolete and does not provide performance advantages over the recommended substitutes.

Frequently Asked Questions (FAQ)

Q1: Can I directly replace TLC277CDG4 with TLC277CDR without circuit modification?

Yes. The TLC277CDR is electrically and mechanically identical to the TLC277CDG4. Both parts share the same electrical specifications, package footprint (8-SOIC), and supply voltage range (3–16 V). The only difference is packaging format (Digi-Reel® vs. standard tube) and product status (Active vs. Obsolete). No circuit redesign is required.

Q2: What are the advantages of using TS272CDT instead of TLC277CDR?

The TS272CDT offers three measurable performance improvements: higher slew rate (5.5 V/µs vs. 5.3 V/µs), higher gain bandwidth product (3.5 MHz vs. 2.2 MHz), and lower supply current consumption (1 mA vs. 1.9 mA per channel). These enhancements result in faster signal response and reduced power dissipation. Both parts are mechanically compatible and operate within the same supply voltage range.

Q3: Are STMicroelectronics TS272 parts pin-compatible with the TLC277CDG4?

Yes. The TS272 series maintains identical pin configuration and 8-SOIC package footprint as the TLC277CDG4. Both parts are surface-mount devices with the same mechanical dimensions (0.154" width, 3.90 mm). PCB layout modifications are not required for substitution.

Q4: Which substitute part should I select for a battery-powered application?

For battery-powered applications where power consumption is critical, the TS27L2ACDT or TS27L2AIDT are appropriate selections. These parts reduce supply current to 10 µA per channel, representing a 99% reduction compared to the TLC277CDG4 (1.9 mA per channel). However, this substitution requires verification that the application can tolerate reduced slew rate (0.04 V/µs) and gain bandwidth product (100 kHz).

Q5: What is the difference between TS272ACDT and TS272AIDT?

Both parts are electrically identical STMicroelectronics TS272 amplifiers with the same performance specifications. The primary difference is operating temperature range: TS272ACDT operates from 0°C to 70°C, while TS272AIDT operates from −40°C to 125°C. Select TS272AIDT for applications requiring extended low-temperature or high-temperature operation.

Q6: Can I use TS272BIDT in place of TS272AIDT?

Yes. The TS272BIDT is electrically compatible with the TS272AIDT and offers superior input offset voltage specification (0.25 mV vs. 0.9 mV). Both parts operate across the extended temperature range (−40°C to 125°C) and share identical package, pin configuration, and supply voltage specifications. The TS272BIDT is appropriate for applications requiring tighter input offset voltage tolerance.

Q7: Why is the LM432MA/NOPB not recommended as a substitute?

The LM432MA/NOPB is a general-purpose amplifier with significantly degraded performance compared to the TLC277CDG4. It features lower gain bandwidth product (1 MHz vs. 2.2 MHz), higher input bias current (3 nA vs. 0.7 pA), and higher input offset voltage (600 µV vs. 1.1 mV). Additionally, the LM432MA/NOPB is classified as obsolete, providing no supply advantage. The recommended TS272 and TLC277 alternatives offer superior performance and availability.

Q8: What packaging formats are available for substitute parts?

Substitute parts are available in multiple packaging formats: Tube, Cut Tape (CT) & Digi-Reel®, and Tape & Reel (TR). The TLC277CDR is supplied in Digi-Reel® format (3142 units in stock). The TS272 series is available in both Cut Tape and Tape & Reel formats with inventory ranging from 1,457 to 21,553 units. Select packaging format based on production volume and assembly equipment compatibility.

Q9: Are all substitute parts RoHS3 compliant?

Yes. All recommended substitute parts (TLC277CD, TLC277CDR, TS272 series, and TS27L2 series) are RoHS3 compliant with Moisture Sensitivity Level 1 (Unlimited). All parts are REACH Unaffected and classified under ECCN EAR99. These certifications ensure regulatory compliance for commercial and industrial applications.

Q10: What is the minimum order quantity for substitute parts?

Inventory availability varies by part number and packaging format. TLC277CDR has 3,142 units in stock. TS272CDT has 17,007 units in stock. TS272IDT has 21,553 units in stock. Minimum order quantities are determined by supplier policies and packaging format. Contact your component distributor for specific minimum order requirements and lead time information.

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