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TL074QDREP Equivalent & Substitute Parts
Part Overview
The TL074QDREP is a J-FET input operational amplifier manufactured by Texas Instruments, configured as a 4-circuit device in a 14-SOIC surface mount package. This component is classified as a linear amplifier and is currently in active product status with substantial inventory availability (50,124 pieces in stock). The TL074QDREP is designed for applications requiring low input bias current, moderate slew rate performance, and wide supply voltage range operation.
Substitute parts are necessary when the TL074QDREP becomes unavailable, when alternative packaging formats are required, or when design specifications permit operation with different amplifier topologies or performance characteristics within the same functional category.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Amplifier Type | J-FET | — |
| Number of Circuits | 4 | — |
| Slew Rate | 13 | V/µs |
| Gain Bandwidth Product | 5.25 | MHz |
| Current - Input Bias | 65 | pA |
| Voltage - Input Offset | 3 | mV |
| Current - Supply (x4 Channels) | 1.4 | mA |
| Current - Output / Channel | 10 | mA |
| Voltage - Supply Span (Min) | 7 | V |
| Voltage - Supply Span (Max) | 36 | V |
| Operating Temperature Range | -40 to 125 | °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 TL074QDREP is determined by compatibility across the following critical parameters:
Package and Mounting Compatibility: All substitute parts must be housed in a 14-SOIC surface mount package with identical 0.154" (3.90mm) width to ensure direct PCB footprint compatibility.
Circuit Configuration: All substitute parts contain 4 operational amplifier circuits to match the quad-channel configuration of the TL074QDREP.
Amplifier Topology: Substitute parts are grouped into two categories: J-FET input amplifiers (TL064 series variants) and general-purpose amplifiers (LM324, AS324, MC33074, MC33174 series). J-FET substitutes maintain the low input bias current characteristic of the original part. General-purpose substitutes offer alternative performance profiles with different input bias current specifications and supply voltage ranges.
Electrical Performance Parameters: Substitution is valid when the substitute part meets or exceeds the minimum requirements for slew rate, gain bandwidth product, input offset voltage, and output current per channel within the application's operational constraints.
Supply Voltage Range: The substitute part's minimum and maximum supply voltage specifications must encompass or be compatible with the system's power supply design. The TL074QDREP operates from 7V to 36V; substitutes with narrower ranges (such as 3V to 32V or 6V to 36V) are valid for systems operating within those overlapping ranges.
Temperature Range: Operating temperature specifications must align with the application's environmental requirements. The TL074QDREP operates from -40°C to 125°C; substitutes with narrower ranges are valid for applications operating within those temperature windows.
Regulatory Compliance: All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory equivalence.
Parameter Comparison
| Parameter | TL074QDREP | TL064ACD | TL064CD | AS324AMTR-G1 | LM324DR2G | LM324EDR2G | MC33074DR2G | MC33174VDR2G | TL064ACDT | TL064CDT | TL064IDT |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Amplifier Type | J-FET | J-FET | J-FET | General Purpose | General Purpose | General Purpose | General Purpose | General Purpose | J-FET | J-FET | J-FET |
| Number of Circuits | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Slew Rate (V/µs) | 13 | 3.5 | 3.5 | — | — | — | 13 | 2.1 | 3.5 | 3.5 | 3.5 |
| Gain Bandwidth Product (MHz) | 5.25 | 1 | 1 | — | 1 | — | 4.5 | 1.8 | 1 | 1 | 1 |
| Current - Input Bias (pA / nA) | 65 pA | 30 pA | 30 pA | 20 nA | 90 nA | 90 nA | 100 nA | 20 nA | 30 pA | 30 pA | 30 pA |
| Voltage - Input Offset (mV) | 3 | 3 | 3 | 2 | 2 | 2 | 1 | 2 | 3 | 3 | 3 |
| Current - Supply (mA / µA) | 1.4 mA | 200 µA | 200 µA | 1 mA | — | — | 1.9 mA | 180 µA | 200 µA | 200 µA | 200 µA |
| Current - Output / Channel (mA) | 10 | — | 20 | 40 | 40 | 40 | 30 | 27 | 20 | 20 | 20 |
| Voltage - Supply Span Min (V) | 7 | 10 | 6 | 3 | 3 | 3 | 3 | 3 | 6 | 6 | 6 |
| Voltage - Supply Span Max (V) | 36 | 30 | 36 | 36 | 32 | 32 | 44 | 44 | 36 | 36 | 36 |
| Operating Temperature (°C) | -40 to 125 | 0 to 70 | 0 to 70 | -40 to 85 | 0 to 70 | 0 to 70 | -40 to 85 | -40 to 125 | 0 to 70 | 0 to 70 | -40 to 105 |
| Package / Case | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 | 1 | 1 | 3 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Engineering Selection Recommendations
J-FET Input Amplifier Substitutes (TL064 Series): The TL064ACD, TL064CD, TL064ACDT, TL064CDT, and TL064IDT are direct functional equivalents to the TL074QDREP in terms of amplifier topology and input bias current characteristics. These parts maintain J-FET input architecture with picoampere-level input bias currents (30 pA). However, these substitutes operate at reduced slew rate (3.5 V/µs versus 13 V/µs) and lower gain bandwidth product (1 MHz versus 5.25 MHz). Selection of TL064 variants is appropriate for applications where the lower performance specifications are acceptable and where J-FET input characteristics are required for low input bias current operation.
The TL064IDT variant offers the widest operating temperature range (-40°C to 105°C) among the TL064 series, making it suitable for extended temperature applications. The TL064CD and TL064CDT variants support the full 36V maximum supply voltage of the TL074QDREP, while TL064ACD is limited to 30V maximum supply.
General-Purpose Amplifier Substitutes: The LM324DR2G, LM324EDR2G, AS324AMTR-G1, MC33074DR2G, and MC33174VDR2G represent general-purpose operational amplifier alternatives. These parts differ from the TL074QDREP in amplifier topology (general-purpose versus J-FET input) and exhibit higher input bias currents (20 nA to 100 nA versus 65 pA). Selection of general-purpose substitutes is appropriate when the application does not require the ultra-low input bias current characteristic of J-FET amplifiers.
The MC33074DR2G provides performance characteristics most closely aligned with the TL074QDREP, offering 13 V/µs slew rate, 4.5 MHz gain bandwidth product, and extended temperature range (-40°C to 85°C). The MC33174VDR2G extends the operating temperature range to -40°C to 125°C, matching the TL074QDREP specification, while offering lower supply current consumption (180 µA versus 1.4 mA).
Product Status and Compliance: All substitute parts maintain active product status with the exception of TL064ACD, which is designated as Last Time Buy. All parts are ROHS3 compliant and REACH unaffected, ensuring regulatory equivalence. Moisture sensitivity levels are predominantly MSL 1 (unlimited), with AS324AMTR-G1 rated at MSL 3 (168 hours), requiring appropriate handling protocols during storage and assembly.
Inventory Availability: LM324DR2G offers the highest inventory availability (105,300 pieces), followed by MC33074DR2G (37,700 pieces) and MC33174VDR2G (27,984 pieces). TL064 series variants maintain inventory levels between 11,300 and 18,160 pieces.
Frequently Asked Questions (FAQ)
Q: Can the TL064 series directly replace the TL074QDREP in all applications?
A: The TL064 series maintains identical package configuration and quad-channel architecture. However, the TL064 operates at reduced slew rate (3.5 V/µs versus 13 V/µs) and lower gain bandwidth product (1 MHz versus 5.25 MHz). Direct substitution is valid only for applications where these reduced performance specifications are acceptable. The TL064 series is suitable for low-frequency signal conditioning, precision measurement, and audio applications where bandwidth requirements do not exceed 1 MHz.
Q: What is the primary difference between J-FET and general-purpose amplifier substitutes?
A: J-FET input amplifiers (TL064 series) exhibit picoampere-level input bias currents (30 pA), making them suitable for high-impedance signal sources and precision instrumentation. General-purpose amplifiers (LM324, AS324, MC33074, MC33174 series) exhibit nanoampere-level input bias currents (20 nA to 100 nA) and are optimized for general-purpose applications with moderate impedance requirements. The TL074QDREP's 65 pA input bias current places it between these categories, favoring J-FET substitutes for applications requiring ultra-low input bias current.
Q: Are all substitute parts compatible with the TL074QDREP's 7V to 36V supply voltage range?
A: No. The TL064ACD is limited to 10V to 30V operation, making it incompatible with systems requiring 7V minimum supply voltage or 36V maximum supply voltage. The TL064CD, TL064ACDT, TL064CDT, and TL064IDT support 6V to 36V operation, compatible with the TL074QDREP's range for systems operating above 7V. General-purpose substitutes (LM324, LM324EDR2G) are limited to 3V to 32V operation, incompatible with 36V maximum supply systems. The MC33074DR2G and MC33174VDR2G support 3V to 44V operation, exceeding the TL074QDREP's range.
Q: Which substitute part offers the best performance match to the TL074QDREP?
A: The MC33074DR2G provides the closest performance alignment, offering identical 13 V/µs slew rate, comparable 4.5 MHz gain bandwidth product, and extended temperature range (-40°C to 85°C). However, the MC33074DR2G is a general-purpose amplifier with 100 nA input bias current, not a J-FET amplifier. For applications requiring J-FET input characteristics, the TL064 series variants are the appropriate substitutes, accepting the trade-off in slew rate and bandwidth performance.
Q: What packaging format considerations apply to substitute selection?
A: All substitute parts are available in 14-SOIC surface mount packages with identical 0.154" (3.90mm) width, ensuring direct PCB footprint compatibility. Packaging format variations (Cut Tape & Digi-Reel versus Tape & Reel) affect supply chain logistics but do not impact electrical or mechanical compatibility. The TL074QDREP is supplied in Cut Tape & Digi-Reel format; equivalent packaging is available for TL064CDT, TL064IDT, LM324DR2G, and MC33074DR2G.
Q: Are there temperature range limitations for substitute selection?
A: The TL074QDREP operates from -40°C to 125°C. Most TL064 variants are limited to 0°C to 70°C operation, unsuitable for extended temperature applications. The TL064IDT extends to -40°C to 105°C, and the MC33174VDR2G matches the full -40°C to 125°C range. For applications requiring the full temperature specification of the TL074QDREP, the MC33174VDR2G is the appropriate general-purpose substitute, or the TL064IDT for J-FET input requirements within -40°C to 105°C.
Q: What is the significance of the AS324AMTR-G1's MSL 3 rating?
A: The AS324AMTR-G1 is rated at Moisture Sensitivity Level 3 (168 hours), compared to MSL 1 (unlimited) for most other substitutes. This designation requires that the component be stored in a controlled humidity environment and limits the time interval between package opening and soldering to 168 hours. All other substitute parts carry MSL 1 rating, permitting unlimited shelf life under standard storage conditions. MSL 3 components require additional handling protocols during manufacturing and assembly.
Q: Can the TL074QDREP be substituted with the LM324 series in cost-sensitive applications?
A: The LM324DR2G and LM324EDR2G offer significantly lower cost and higher inventory availability compared to the TL074QDREP. However, these general-purpose amplifiers exhibit 90 nA input bias current (versus 65 pA for the TL074QDREP) and are limited to 3V to 32V supply operation (versus 7V to 36V). Substitution is valid only for applications where the higher input bias current and narrower supply voltage range are acceptable. The LM324 series is suitable for general-purpose signal conditioning, filtering, and buffering applications not requiring ultra-low input bias current or extended supply voltage range.
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