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TLC277CD Equivalent & Substitute Parts
Part Overview
The TLC277CD is a CMOS dual-channel operational amplifier manufactured by Texas Instruments in the LinCMOS™ series. This device is packaged in an 8-SOIC surface mount configuration and operates across a 3V to 16V supply voltage range. The TLC277CD is designated as Last Time Buy status, indicating that Texas Instruments has discontinued this product line. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.
Substiute Parts
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 (x2 Channels) | 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 TLC277CD 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: 3V to 16V minimum
- Operating Temperature Range: Must encompass 0°C to 70°C
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 - Output / Channel: 30 mA or greater
- Current - Supply: 1.9 mA (x2 Channels) or lower
Substitute parts are grouped into two categories: direct equivalents from Texas Instruments and cross-manufacturer alternatives from STMicroelectronics. All substitute parts maintain ROHS3 compliance and MSL Level 1 rating.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Amplifier Type | Slew Rate (V/µs) | GBW (MHz) | Input Bias (pA) | Input Offset (mV) | Supply Current (mA) | Output Current (mA) | Temp Range (°C) | Package |
|---|---|---|---|---|---|---|---|---|---|---|---|
| TLC277CD | Texas Instruments | Last Time Buy | CMOS | 5.3 | 2.2 | 0.7 | 1.1 | 1.9 | 30 | 0 to 70 | 8-SOIC |
| TLC277CDR | Texas Instruments | Active | CMOS | 5.3 | 2.2 | 0.7 | 1.1 | 1.9 | 30 | 0 to 70 | 8-SOIC |
| TS272ACDT | STMicroelectronics | Active | CMOS | 5.5 | 3.5 | 1 | 0.9 | 1 | 45 | 0 to 70 | 8-SOIC |
| TS272AIDT | STMicroelectronics | Active | CMOS | 5.5 | 3.5 | 1 | 0.9 | 1 | 45 | -40 to 125 | 8-SOIC |
| TS272BIDT | STMicroelectronics | Active | CMOS | 5.5 | 3.5 | 1 | 0.25 | 1 | 45 | -40 to 125 | 8-SOIC |
| TS272CDT | STMicroelectronics | Active | CMOS | 5.5 | 3.5 | 1 | 1.1 | 1 | 45 | 0 to 70 | 8-SOIC |
| TS272IDT | STMicroelectronics | Active | CMOS | 5.5 | 3.5 | 1 | 1.1 | 1 | 45 | -40 to 125 | 8-SOIC |
| TS27L2ACDT | STMicroelectronics | Active | CMOS | 0.04 | 0.1 | 1 | 0.9 | 0.01 | 45 | 0 to 70 | 8-SOIC |
| TS27L2AIDT | STMicroelectronics | Active | CMOS | 0.04 | 0.1 | 1 | 1.1 | 0.01 | 45 | -40 to 125 | 8-SOIC |
| TS27L2BIDT | STMicroelectronics | Active | CMOS | 0.04 | 0.1 | 1 | 0.25 | 0.01 | 45 | -40 to 125 | 8-SOIC |
| LM432MA/NOPB | Texas Instruments | Obsolete | General Purpose | — | 1 | 3 | 0.6 | 0.15 | 30 | -40 to 85 | 8-SOIC |
Engineering Selection Recommendations
Tier 1 - Direct Equivalent (Recommended Primary Choice):
The TLC277CDR is the direct successor to the TLC277CD. Both devices are manufactured by Texas Instruments, share identical electrical specifications, and are packaged in the same 8-SOIC configuration. The TLC277CDR is designated as Active product status, ensuring long-term availability and supply chain stability. This part provides a one-to-one functional replacement with no design modifications required. The TLC277CDR is available in Cut Tape and Digi-Reel packaging formats.
Tier 2 - Cross-Manufacturer CMOS Alternatives (Performance Enhancement):
The STMicroelectronics TS272 series (TS272ACDT, TS272AIDT, TS272BIDT, TS272CDT, TS272IDT) provides enhanced electrical performance while maintaining CMOS amplifier topology and 8-SOIC packaging. These devices offer superior slew rate (5.5 V/µs versus 5.3 V/µs), higher gain bandwidth product (3.5 MHz versus 2.2 MHz), and lower supply current (1 mA versus 1.9 mA). Temperature range variants are available: standard industrial (0°C to 70°C) and extended (−40°C to 125°C). Input offset voltage specifications range from 0.25 mV to 1.1 mV depending on grade selection.
Tier 3 - Ultra-Low Power CMOS Alternatives (Power-Constrained Applications):
The STMicroelectronics TS27L2 series (TS27L2ACDT, TS27L2AIDT, TS27L2BIDT) is suitable for applications requiring minimal power consumption. These devices operate at 10 µA supply current (versus 1.9 mA for the TLC277CD) but feature reduced slew rate (0.04 V/µs) and lower gain bandwidth product (100 kHz). Selection of this series requires verification that application bandwidth requirements are compatible with the reduced frequency response.
Not Recommended:
The LM432MA/NOPB is designated as Obsolete and features General Purpose amplifier topology rather than CMOS. This device exhibits higher input bias current (3 nA versus 0.7 pA) and lower gain bandwidth product (1 MHz versus 2.2 MHz), making it unsuitable as a direct substitute for CMOS-specific applications.
Frequently Asked Questions (FAQ)
Q: Can the TLC277CDR be used as a direct replacement for the TLC277CD?
A: Yes. The TLC277CDR is the active production equivalent of the TLC277CD. Both devices share identical electrical specifications, CMOS amplifier topology, 8-SOIC packaging, and operating temperature range (0°C to 70°C). The only difference is product status and packaging format. No circuit modifications are required.
Q: What is the primary advantage of the TS272 series over the TLC277CD?
A: The TS272 series offers improved electrical performance: slew rate of 5.5 V/µs (versus 5.3 V/µs), gain bandwidth product of 3.5 MHz (versus 2.2 MHz), and reduced supply current of 1 mA per channel (versus 1.9 mA). These enhancements provide faster signal response and lower power consumption while maintaining CMOS topology and 8-SOIC packaging compatibility.
Q: Are the TS272 variants (ACDT, AIDT, BIDT, CDT, IDT) interchangeable?
A: The TS272 variants differ in temperature range and input offset voltage specifications. TS272ACDT and TS272CDT operate at 0°C to 70°C, while TS272AIDT and TS272IDT extend to −40°C to 125°C. Input offset voltage ranges from 0.25 mV (B-grade) to 1.1 mV (C-grade). Selection depends on application temperature requirements and offset voltage tolerance. Packaging format also varies: CT (Cut Tape), TR (Tape & Reel), and Digi-Reel options are available.
Q: When should the TS27L2 series be considered?
A: The TS27L2 series is appropriate for power-constrained applications where supply current must be minimized. These devices consume only 10 µA per channel compared to 1.9 mA for the TLC277CD. However, the TS27L2 series exhibits significantly reduced bandwidth (100 kHz versus 2.2 MHz) and slew rate (0.04 V/µs versus 5.3 V/µs). Application bandwidth requirements must be verified before selection.
Q: Is the LM432MA/NOPB a viable substitute?
A: No. The LM432MA/NOPB is obsolete and features General Purpose amplifier topology rather than CMOS. Input bias current is 3 nanoamperes (versus 0.7 picoamperes for the TLC277CD), representing a 4,000-fold increase. Gain bandwidth product is 1 MHz versus 2.2 MHz. This device is unsuitable for applications requiring CMOS input characteristics and is not recommended.
Q: What packaging formats are available for substitute parts?
A: Substitute parts are available in multiple packaging formats: Tube, Cut Tape (CT) & Digi-Reel®, and Tape & Reel (TR). The TLC277CDR is available in Cut Tape and Digi-Reel formats. The TS272 and TS27L2 series offer all three packaging options. Packaging selection does not affect electrical performance; selection is based on production volume and assembly process requirements.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All substitute parts listed in this reference document are RoHS3 compliant and carry Moisture Sensitivity Level 1 (Unlimited) rating. All parts are REACH unaffected and classified under ECCN EAR99.
Q: What is the difference between 8-SOIC and 8-SO package designations?
A: Both designations refer to 8-pin small-outline integrated circuit packages with 0.154-inch (3.90 mm) width. The designations are functionally equivalent for component selection purposes. Pin configuration and footprint compatibility are identical.
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