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TLC277IDG4 Equivalent & Substitute Parts
Part Overview
The TLC277IDG4 is a CMOS dual-channel operational amplifier manufactured by Texas Instruments, packaged in an 8-SOIC surface mount configuration. This device is classified as obsolete, indicating it has reached end-of-life status and is no longer in active production. The LinCMOS™ series architecture provides low-power CMOS amplification suitable for general signal conditioning applications requiring dual-channel operation.
Due to its obsolete product status, identifying equivalent and substitute parts is necessary for design continuity, production planning, and long-term supply chain management. Substitute parts must maintain electrical compatibility across critical parameters including supply voltage range, slew rate, gain bandwidth product, and output current specifications.
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 | 900 | µV |
| Current - Supply (per Channel) | 1.4 | mA |
| Current - Output / Channel | 30 | mA |
| Voltage - Supply Span (Min) | 4 | V |
| Voltage - Supply Span (Max) | 16 | V |
| Operating Temperature Range | -40 to 85 | °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
Substitute parts for the TLC277IDG4 are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution logic is determined by the following parameters:
Critical Compatibility Parameters:
- Amplifier Type: CMOS architecture
- Number of Circuits: Dual-channel (2 circuits)
- Package / Case: 8-SOIC surface mount form factor
- Supply Voltage Range: Minimum 4V to maximum 16V
- Output Current Capability: Minimum 30 mA per channel
- Operating Temperature: Support for -40°C to 85°C range
Secondary Performance Parameters:
- Slew Rate: 5.3 V/µs or greater
- Gain Bandwidth Product: 2.2 MHz or greater
- Input Bias Current: 0.7 pA or lower
- Input Offset Voltage: 900 µV or lower
Substitute parts are classified into two categories:
Category 1: Direct Texas Instruments Substitutes (TLC277 Series) These parts maintain identical electrical specifications and LinCMOS™ series architecture. Differences exist only in packaging format (tube vs. cut tape vs. tape & reel) and product status (active vs. last time buy).
Category 2: Cross-Manufacturer Substitutes (STMicroelectronics TS272 Series) These parts provide equivalent CMOS dual-channel amplification with enhanced performance characteristics. They meet or exceed all critical electrical parameters while maintaining 8-SOIC package compatibility. Performance enhancements include higher slew rate (5.5 V/µs), higher gain bandwidth product (3.5 MHz), and lower supply current (1 mA vs. 1.4 mA per channel).
Category 3: Alternative Performance Profile (TS27L2 Series) These parts provide ultra-low power operation (10 µA supply current) with reduced bandwidth (100 kHz) and slew rate (0.04 V/µs). These are suitable only for applications where power consumption is prioritized over bandwidth performance.
Parameter Comparison
| Part Number | Manufacturer | Product Status | Slew Rate (V/µs) | GBW (MHz) | Input Bias (pA) | Input Offset (µV) | Supply Current (mA) | Output Current (mA) | Temp Range (°C) | Packaging |
|---|---|---|---|---|---|---|---|---|---|---|
| TLC277IDG4 | Texas Instruments | Obsolete | 5.3 | 2.2 | 0.7 | 900 | 1.4 | 30 | -40 to 85 | 8-SOIC |
| TLC277ID | Texas Instruments | Last Time Buy | 5.3 | 2.2 | 0.7 | 900 | 1.4 | 30 | -40 to 85 | 8-SOIC |
| TLC277IDR | Texas Instruments | Active | 5.3 | 2.2 | 0.7 | 900 | 1.4 | 30 | -40 to 85 | 8-SOIC |
| TS272ACDT | STMicroelectronics | Active | 5.5 | 3.5 | 1 | 900 | 1 | 45 | 0 to 70 | 8-SOIC |
| TS272AIDT | STMicroelectronics | Active | 5.5 | 3.5 | 1 | 900 | 1 | 45 | -40 to 125 | 8-SOIC |
| TS272BIDT | STMicroelectronics | Active | 5.5 | 3.5 | 1 | 250 | 1 | 45 | -40 to 125 | 8-SOIC |
| TS272CDT | STMicroelectronics | Active | 5.5 | 3.5 | 1 | 1100 | 1 | 45 | 0 to 70 | 8-SOIC |
| TS272IDT | STMicroelectronics | Active | 5.5 | 3.5 | 1 | 1100 | 1 | 45 | -40 to 125 | 8-SOIC |
| TS27L2ACDT | STMicroelectronics | Active | 0.04 | 0.1 | 1 | 900 | 0.01 | 45 | 0 to 70 | 8-SOIC |
| TS27L2AIDT | STMicroelectronics | Active | 0.04 | 0.1 | 1 | 1100 | 0.01 | 45 | -40 to 125 | 8-SOIC |
| LM432MA/NOPB | Texas Instruments | Obsolete | — | 1 | 3 | 600 | 0.15 | 30 | -40 to 85 | 8-SOIC |
Engineering Selection Recommendations
Primary Recommendation: TLC277IDR
The TLC277IDR is the preferred substitute for the TLC277IDG4. This part is manufactured by Texas Instruments, maintains identical electrical specifications across all critical parameters, and holds active product status. The TLC277IDR provides direct functional equivalence with the obsolete TLC277IDG4, differing only in packaging format (cut tape and digi-reel versus the original tube packaging). Both parts are ROHS3 compliant and carry identical REACH and ECCN classifications. The TLC277IDR is currently in active production with 1649 units in stock, ensuring supply continuity.
Secondary Recommendation: TLC277ID
The TLC277ID serves as an alternative Texas Instruments substitute with identical electrical performance to the TLC277IDG4. This part carries last time buy status, indicating limited future availability. It is suitable for applications where tube packaging is required. The TLC277ID maintains full electrical compatibility and compliance certifications.
Cross-Manufacturer Alternative: TS272AIDT
The TS272AIDT (STMicroelectronics) provides enhanced performance characteristics while maintaining 8-SOIC package compatibility. This part exceeds the TLC277IDG4 specifications in slew rate (5.5 V/µs vs. 5.3 V/µs), gain bandwidth product (3.5 MHz vs. 2.2 MHz), and output current capability (45 mA vs. 30 mA per channel). The TS272AIDT supports the extended temperature range (-40°C to 125°C) and is in active production status. This part is suitable for applications requiring enhanced performance margins or extended temperature operation.
Alternative for Extended Temperature Range: TS272IDT
The TS272IDT provides identical performance to TS272AIDT with extended temperature support (-40°C to 125°C) and is available in tape & reel packaging. This part is suitable for industrial and automotive applications requiring wider temperature operation.
Low-Power Alternative: TS27L2AIDT
The TS27L2AIDT is suitable only for applications where ultra-low power consumption (10 µA supply current) is the primary design constraint. This part sacrifices bandwidth (100 kHz vs. 2.2 MHz) and slew rate (0.04 V/µs vs. 5.3 V/µs) for power efficiency. This part is not recommended for general-purpose signal conditioning applications requiring the original TLC277IDG4 performance profile.
Not Recommended: LM432MA/NOPB
The LM432MA/NOPB is a general-purpose amplifier with significantly reduced performance specifications. The gain bandwidth product (1 MHz) is insufficient for applications designed around the TLC277IDG4 (2.2 MHz). Input bias current (3 nA) is substantially higher than the TLC277IDG4 (0.7 pA). This part is obsolete and not suitable as a substitute.
Frequently Asked Questions (FAQ)
Q: Can the TLC277IDR directly replace the TLC277IDG4 in existing designs?
A: Yes. The TLC277IDR is electrically identical to the TLC277IDG4 across all specified parameters. Both parts are CMOS dual-channel amplifiers in 8-SOIC packages with identical supply voltage ranges (-40°C to 85°C operating temperature), slew rate (5.3 V/µs), gain bandwidth product (2.2 MHz), and output current capability (30 mA per channel). The only difference is packaging format. No circuit modifications are required.
Q: What is the difference between TLC277IDG4, TLC277ID, and TLC277IDR?
A: These three parts are electrically identical Texas Instruments TLC277 variants. The differences are: TLC277IDG4 is obsolete and supplied in tube packaging; TLC277ID is last time buy status in tube packaging; TLC277IDR is active production status in cut tape and digi-reel packaging. All three maintain identical electrical specifications and are interchangeable from a functional perspective.
Q: Why would I choose TS272AIDT over TLC277IDR?
A: The TS272AIDT offers enhanced performance specifications including higher slew rate (5.5 V/µs vs. 5.3 V/µs), higher gain bandwidth product (3.5 MHz vs. 2.2 MHz), higher output current (45 mA vs. 30 mA per channel), and lower supply current (1 mA vs. 1.4 mA per channel). The TS272AIDT also supports extended temperature operation (-40°C to 125°C). These enhancements provide additional design margin for demanding applications. However, the TS272AIDT is a cross-manufacturer part from STMicroelectronics and may require qualification in existing designs.
Q: Is the TS27L2ACDT a suitable substitute for the TLC277IDG4?
A: No. The TS27L2ACDT is not suitable for applications requiring the TLC277IDG4 performance profile. While both are CMOS dual-channel amplifiers in 8-SOIC packages, the TS27L2ACDT is optimized for ultra-low power operation with a gain bandwidth product of only 100 kHz and slew rate of 0.04 V/µs. The TLC277IDG4 specifies 2.2 MHz bandwidth and 5.3 V/µs slew rate. The TS27L2ACDT is suitable only for low-bandwidth, power-constrained applications.
Q: What is the operating temperature difference between TS272ACDT and TS272AIDT?
A: The TS272ACDT operates over 0°C to 70°C, while the TS272AIDT operates over -40°C to 125°C. Both parts are electrically identical except for temperature range. The TS272AIDT is suitable for industrial and automotive applications requiring extended temperature operation. The TS272ACDT is suitable for commercial temperature range applications.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All substitute parts listed (TLC277ID, TLC277IDR, TS272ACDT, TS272AIDT, TS272BIDT, TS272CDT, TS272IDT, TS27L2ACDT, TS27L2AIDT) are ROHS3 compliant. All parts carry moisture sensitivity level 1 (unlimited) and are REACH unaffected.
Q: Can I use TS272BIDT instead of TS272AIDT?
A: Yes, with one consideration. The TS272BIDT is electrically identical to TS272AIDT except for input offset voltage specification (250 µV vs. 900 µV). The TS272BIDT provides tighter input offset voltage tolerance, which may be beneficial for precision applications. Both parts support -40°C to 125°C temperature range and are in active production.
Q: What is the difference between cut tape and tape & reel packaging?
A: Cut tape (CT) and digi-reel packaging is supplied on continuous tape in individual cut lengths, suitable for automated pick-and-place assembly. Tape & reel (TR) packaging is supplied on continuous reel format for high-volume automated assembly. Both formats contain identical parts; the difference is in supply format and handling. Select based on your assembly process requirements.
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