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TL064ACD Equivalent & Substitute Parts
Part Overview
The TL064ACD is a J-FET input operational amplifier containing four independent circuits in a 14-SOIC surface mount package, manufactured by STMicroelectronics. This device is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and production requirements. The TL064ACD operates across a supply voltage range of 6V to 36V with low input bias current of 30 pA and is suitable for applications requiring precision amplification with minimal input offset voltage.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | J-FET | — |
| Number of Circuits | 4 | — |
| Slew Rate | 3.5 | V/µs |
| Gain Bandwidth Product | 1 | MHz |
| Current - Input Bias | 30 | pA |
| Voltage - Input Offset | 3 | mV |
| Current - Supply (x4 Channels) | 200 | µA |
| Current - Output / Channel | 20 | mA |
| Voltage - Supply Span (Min) | 6 | V |
| Voltage - Supply Span (Max) | 36 | V |
| Operating Temperature | 0 to 70 | °C |
| Package / Case | 14-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 TL064ACD is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria are:
Critical Parameters for Substitution:
- Amplifier Type: J-FET input configuration
- Number of Circuits: Four independent amplifier stages
- Package / Case: 14-SOIC form factor with 0.154" width (3.90mm)
- Mounting Type: Surface mount compatibility
- Slew Rate: 3.5 V/µs minimum
- Gain Bandwidth Product: 1 MHz
- Input Bias Current: 30 pA maximum
- Supply Voltage Range: Minimum 6V to maximum 36V
- Operating Temperature: 0°C to 70°C minimum coverage
Substitute parts are grouped into three categories:
Direct Equivalents (Same Manufacturer Variants): Parts sharing identical electrical specifications with alternative packaging or product status, including TL064CDT and TL064ID.
Cross-Manufacturer Equivalents (Texas Instruments): Parts with matching J-FET architecture and electrical performance from alternative manufacturers, including TL064ACD (Texas Instruments variant), TL064ACDR, and TL064IDR.
Functional Alternatives (General Purpose Amplifiers): Parts with different amplifier topology (General Purpose instead of J-FET) that meet the four-circuit, 14-SOIC package requirement but with different electrical characteristics, including AS324 series variants and LF444CM/NOPB.
Parameter Comparison
| Part Number | Manufacturer | Amplifier Type | Slew Rate (V/µs) | GBW (MHz) | Input Bias (pA) | Supply Min (V) | Supply Max (V) | Temp Range (°C) | Product Status | Package |
|---|---|---|---|---|---|---|---|---|---|---|
| TL064ACD | STMicroelectronics | J-FET | 3.5 | 1 | 30 | 6 | 36 | 0 to 70 | Obsolete | 14-SOIC |
| TL064CDT | STMicroelectronics | J-FET | 3.5 | 1 | 30 | 6 | 36 | 0 to 70 | Active | 14-SOIC |
| TL064ACD | Texas Instruments | J-FET | 3.5 | 1 | 30 | 10 | 30 | 0 to 70 | Last Time Buy | 14-SOIC |
| TL064ACDR | Texas Instruments | J-FET | 3.5 | 1 | 30 | 10 | 30 | 0 to 70 | Active | 14-SOIC |
| TL064ID | STMicroelectronics | J-FET | 3.5 | 1 | 30 | 6 | 36 | -40 to 105 | Obsolete | 14-SOIC |
| TL064IDR | Texas Instruments | J-FET | 3.5 | 1 | 30 | 10 | 30 | -40 to 85 | Active | 14-SOIC |
| LF444CM/NOPB | Texas Instruments | J-FET | 1 | 1 | 10 | 36 | 36 | 0 to 70 | Active | 14-SOIC |
| AS324AMTR-E1 | Diodes Incorporated | General Purpose | — | — | 20000 | 3 | 36 | -40 to 85 | Active | 14-SOIC |
| AS324AMTR-G1 | Diodes Incorporated | General Purpose | — | — | 20000 | 3 | 36 | -40 to 85 | Active | 14-SOIC |
| AS324MTR-E1 | Diodes Incorporated | General Purpose | — | — | 20000 | 3 | 36 | -40 to 85 | Active | 14-SOIC |
| AS324MTR-G1 | Diodes Incorporated | General Purpose | — | — | 20000 | 3 | 36 | -40 to 85 | Active | 14-SOIC |
Engineering Selection Recommendations
Primary Substitutes (Recommended for Direct Replacement):
TL064CDT (STMicroelectronics) and TL064ACDR (Texas Instruments) are the preferred substitutes for the obsolete TL064ACD. Both parts maintain identical J-FET amplifier architecture, electrical specifications, and 14-SOIC packaging. TL064CDT carries Active product status with 18,160 units in stock, while TL064ACDR is also Active with 1,561 units available. Both are ROHS3 compliant with MSL 1 rating, ensuring compatibility with existing supply chain requirements.
Secondary Substitutes (Extended Temperature Range):
TL064IDR (Texas Instruments) provides an extended operating temperature range of -40°C to 85°C compared to the original 0°C to 70°C specification. This part is Active with 35,100 units in stock and maintains all critical J-FET electrical parameters. The supply voltage range is constrained to 10V minimum and 30V maximum, which may limit applicability in designs requiring the full 6V to 36V range of the original part.
Alternative Substitutes (Different Amplifier Architecture):
AS324MTR-G1 (Diodes Incorporated) and AS324MTR-E1 (Diodes Incorporated) are General Purpose amplifiers with four circuits in 14-SOIC packaging. These parts feature significantly different electrical characteristics: input bias current of 20 nanoamperes (versus 30 picoamperes), lower supply current of 1 milliampere per channel (versus 200 microamperes), and extended supply voltage range of 3V to 36V. These alternatives are suitable only for applications where J-FET input characteristics are not critical and where the higher input bias current is acceptable.
Compliance and Certification:
All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, consistent with the original TL064ACD. Moisture sensitivity levels range from MSL 1 (Unlimited) to MSL 3 (168 Hours), with MSL 1 parts preferred for unrestricted storage and handling.
Frequently Asked Questions (FAQ)
Q: Can TL064CDT be used as a direct replacement for TL064ACD?
A: Yes. TL064CDT is manufactured by STMicroelectronics and maintains identical electrical specifications including J-FET amplifier type, 3.5 V/µs slew rate, 1 MHz gain bandwidth product, 30 pA input bias current, and 6V to 36V supply range. The primary difference is product status (Active versus Obsolete) and packaging format (Cut Tape & Digi-Reel versus standard packaging). Both use 14-SOIC form factor.
Q: What is the difference between TL064ACDR and TL064IDR?
A: Both are Texas Instruments J-FET amplifiers in 14-SOIC packaging with identical electrical specifications. TL064ACDR operates from 0°C to 70°C with supply range 10V to 30V and is Last Time Buy status. TL064IDR operates from -40°C to 85°C with the same supply range and is Active status. TL064IDR is preferred for new designs requiring extended temperature coverage.
Q: Why do AS324 series parts have different input bias current specifications?
A: AS324 series parts use General Purpose amplifier architecture rather than J-FET input design. General Purpose amplifiers typically exhibit input bias currents in the nanoampere range (20 nA for AS324 series) compared to picoampere range (30 pA for TL064ACD). This fundamental difference in input stage design affects circuit performance in high-impedance applications and should be evaluated against specific application requirements.
Q: Is LF444CM/NOPB suitable as a substitute for TL064ACD?
A: LF444CM/NOPB is a J-FET amplifier with four circuits in 14-SOIC packaging and maintains the same 1 MHz gain bandwidth product. However, it exhibits different electrical characteristics: 1 V/µs slew rate (versus 3.5 V/µs), 10 pA input bias current (versus 30 pA), and 600 µA supply current per channel (versus 200 µA). The supply voltage specification is fixed at 36V (±18V dual supply) rather than the 6V to 36V range. Substitution is application-dependent.
Q: What packaging options are available for TL064 equivalents?
A: All substitute parts listed maintain the 14-SOIC (0.154", 3.90mm Width) surface mount package form factor. Packaging format variations include Tube, Cut Tape & Digi-Reel, and Tape & Reel configurations. These variations affect delivery and handling but do not alter electrical or mechanical compatibility for PCB assembly.
Q: Are there supply voltage limitations when substituting with Texas Instruments variants?
A: Yes. Texas Instruments TL064ACD, TL064ACDR, and TL064IDR specify a minimum supply voltage of 10V and maximum of 30V, compared to the STMicroelectronics TL064ACD specification of 6V to 36V. Designs operating below 10V or above 30V require the STMicroelectronics variants (TL064CDT or TL064ID) to maintain specification compliance.
Q: What is the significance of MSL (Moisture Sensitivity Level) ratings?
A: MSL 1 (Unlimited) indicates no moisture sensitivity restrictions and allows indefinite storage without desiccant packaging. MSL 3 (168 Hours) requires desiccant packaging and limits storage to 168 hours after opening. For supply chain flexibility and reduced handling requirements, MSL 1 parts such as TL064CDT and TL064IDR are preferred over MSL 3 alternatives.
Q: Can I use AS324AMTR-G1 in place of TL064ACD in a precision instrumentation circuit?
A: AS324AMTR-G1 is a General Purpose amplifier with 20 nanoampere input bias current, which is approximately 667 times higher than the TL064ACD specification of 30 picoamperes. In precision instrumentation applications requiring minimal input bias current and offset voltage drift, this substitution introduces significant performance degradation and is not recommended without circuit redesign.
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