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TL074IDRG4 Equivalent & Substitute Parts
Part Overview
The TL074IDRG4 is a J-FET input operational amplifier featuring four independent circuits in a 14-SOIC surface mount package. Manufactured by Texas Instruments, this device is designed for applications requiring low input bias current and stable gain characteristics across a wide supply voltage range. The TL074IDRG4 is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and maintenance applications.
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 | 1.4 | mA (x4 Channels) |
| Voltage - Supply Span (Min) | 10 | V |
| Voltage - Supply Span (Max) | 30 | V |
| Operating Temperature | -40 to 85 | °C |
| Mounting Type | Surface Mount | — |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution eligibility for the TL074IDRG4 is determined by the following critical parameters:
Primary Substitution Criteria:
- Amplifier Type: J-FET (required for input bias current characteristics)
- Number of Circuits: 4 (functional requirement)
- Package / Case: 14-SOIC compatible footprint (mechanical requirement)
- Mounting Type: Surface Mount (assembly compatibility)
Secondary Compatibility Parameters:
- Slew Rate: 13 V/µs or higher (performance requirement)
- Gain Bandwidth Product: 3 MHz or higher (functional requirement)
- Current - Input Bias: 65 pA or lower (performance requirement)
- Voltage - Input Offset: 3 mV or lower (performance requirement)
- Current - Supply: 1.4 mA per channel or lower (power requirement)
- Voltage - Supply Span: Minimum 10 V to 30 V range (operational requirement)
- Operating Temperature: -40°C to 85°C or extended range (environmental requirement)
- RoHS Status: ROHS3 Compliant (regulatory requirement)
- Moisture Sensitivity Level: 1 (Unlimited) (handling requirement)
Substitute parts are grouped based on adherence to these criteria. Parts meeting all primary criteria and most secondary criteria are classified as direct substitutes. Parts with minor parameter variations are classified as functional alternatives with noted deviations.
Parameter Comparison
| Part Number | Manufacturer | Amplifier Type | Number of Circuits | Slew Rate (V/µs) | Gain Bandwidth Product (MHz) | Input Bias Current (pA) | Input Offset Voltage (mV) | Supply Current (mA x4) | Supply Voltage Min (V) | Supply Voltage Max (V) | Operating Temp (°C) | Package | Product Status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TL074IDRG4 | Texas Instruments | J-FET | 4 | 13 | 5.25 | 65 | 3 | 1.4 | 10 | 30 | -40 to 85 | 14-SOIC | Discontinued |
| TL074IDR | Texas Instruments | J-FET | 4 | 13 | 5.25 | 65 | 3 | 1.4 | 10 | 30 | -40 to 85 | 14-SOIC | Active |
| TL074BCD | Texas Instruments | J-FET | 4 | 13 | 5.25 | 65 | 2 | 1.4 | 10 | 30 | 0 to 70 | 14-SOIC | Obsolete |
| AS324MTR-G1 | Diodes Incorporated | General Purpose | 4 | — | — | 20000 | 2 | 1 | 3 | 36 | -40 to 85 | 14-SOIC | Active |
| LF247DT | STMicroelectronics | J-FET | 4 | 16 | 4 | 20 | 3 | 1.4 | 44 | 44 | -40 to 105 | 14-SOIC | Active |
| LF347D | STMicroelectronics | J-FET | 4 | 16 | 3 | 20 | 3 | 1.4 | 44 | 44 | 0 to 70 | 14-SOIC | Active |
| LF347DT | STMicroelectronics | J-FET | 4 | 16 | 4 | 20 | 3 | 1.4 | 44 | 44 | 0 to 70 | 14-SOIC | Active |
| TL074ACDT | STMicroelectronics | J-FET | 4 | 13 | 3 | 20 | 3 | 1.4 | 6 | 36 | 0 to 70 | 14-SOIC | Active |
| TL074BCDT | STMicroelectronics | J-FET | 4 | 13 | 3 | 20 | 1 | 1.4 | 36 | 36 | 0 to 70 | 14-SOIC | Active |
| TL074CDT | STMicroelectronics | J-FET | 4 | 13 | 3 | 30 | 3 | 1.4 | 6 | 36 | 0 to 70 | 14-SOIC | Active |
| TL074IDT | STMicroelectronics | J-FET | 4 | 13 | 3 | 20 | 3 | 1.4 | 6 | 36 | -40 to 105 | 14-SOIC | Active |
Engineering Selection Recommendations
Primary Recommendation: TL074IDR
The TL074IDR is the direct equivalent to the TL074IDRG4. Both parts share identical electrical specifications including slew rate (13 V/µs), gain bandwidth product (5.25 MHz), input bias current (65 pA), input offset voltage (3 mV), and supply voltage range (10 V to 30 V). The TL074IDR is manufactured by Texas Instruments with Active product status and is available in Cut Tape and Digi-Reel packaging. This part maintains full compatibility with existing designs and assembly processes.
Secondary Recommendation: TL074IDT
The TL074IDT, manufactured by STMicroelectronics, provides J-FET amplifier functionality with four circuits in 14-SOIC packaging. This part features an extended operating temperature range (-40°C to 105°C) compared to the original specification (-40°C to 85°C). The TL074IDT maintains input bias current at 20 pA and input offset voltage at 3 mV. Supply voltage range is 6 V to 36 V, which encompasses the original 10 V to 30 V requirement. Product status is Active with substantial inventory availability.
Alternative Consideration: LF247DT
The LF247DT, manufactured by STMicroelectronics, is a J-FET amplifier with four circuits in 14-SOIC packaging. This part features improved slew rate (16 V/µs) and extended operating temperature range (-40°C to 105°C). Input bias current is 20 pA and input offset voltage is 3 mV. The supply voltage specification is fixed at 44 V, which differs from the original flexible range. This part is suitable for applications where the fixed supply voltage is compatible with system design.
Not Recommended: AS324MTR-G1
The AS324MTR-G1 is a General Purpose amplifier, not a J-FET amplifier. Input bias current is 20 nA, which is significantly higher than the original 65 pA specification. This part is not suitable for applications requiring the low input bias current characteristics of J-FET amplifiers.
Not Recommended: TL074BCD
The TL074BCD is classified as Obsolete. Although electrical specifications are similar to the original part, the obsolete status indicates limited availability and potential supply chain discontinuation.
Frequently Asked Questions (FAQ)
Q: Can TL074IDR be used as a direct replacement for TL074IDRG4?
A: Yes. The TL074IDR is electrically and mechanically identical to the TL074IDRG4. Both parts feature J-FET amplifier technology with four circuits, identical slew rate (13 V/µs), gain bandwidth product (5.25 MHz), input bias current (65 pA), and supply voltage range (10 V to 30 V). The primary difference is product status: TL074IDR is Active while TL074IDRG4 is Discontinued.
Q: What is the difference between TL074IDT and TL074IDR?
A: Both parts are J-FET amplifiers with four circuits in 14-SOIC packaging. The TL074IDT is manufactured by STMicroelectronics while TL074IDR is manufactured by Texas Instruments. The TL074IDT offers an extended operating temperature range (-40°C to 105°C) compared to TL074IDR (-40°C to 85°C). Supply voltage range for TL074IDT is 6 V to 36 V, providing greater flexibility than TL074IDR (10 V to 30 V).
Q: Why is AS324MTR-G1 not recommended as a substitute?
A: The AS324MTR-G1 is a General Purpose amplifier, not a J-FET amplifier. The input bias current specification is 20 nA, approximately 300 times higher than the TL074IDRG4 specification of 65 pA. Applications requiring low input bias current characteristics will not function correctly with this part.
Q: Are all substitute parts available in 14-SOIC packaging?
A: Yes. All recommended substitute parts are available in 14-SOIC (0.154", 3.90mm Width) surface mount packaging, ensuring mechanical compatibility with existing PCB designs and assembly equipment.
Q: What is the significance of the operating temperature range difference?
A: The TL074IDRG4 operates from -40°C to 85°C. Substitute parts such as TL074IDT and LF247DT extend this range to -40°C to 105°C. Extended temperature range is beneficial for applications in harsh environments or high-temperature locations. However, if the original design operates only within -40°C to 85°C, the extended range provides no functional advantage.
Q: Can LF247DT be used in applications requiring variable supply voltage?
A: No. The LF247DT supply voltage specification is fixed at 44 V, unlike the TL074IDRG4 which accepts 10 V to 30 V. The LF247DT is suitable only for applications with fixed 44 V supply voltage. For applications requiring variable supply voltage within the 10 V to 30 V range, TL074IDR or TL074IDT are appropriate choices.
Q: What is the RoHS compliance status of substitute parts?
A: All recommended substitute parts are ROHS3 Compliant, matching the original TL074IDRG4 specification. This ensures compliance with environmental and regulatory requirements for electronic components.
Q: Are there packaging format differences among substitute parts?
A: Yes. TL074IDR is available in Cut Tape and Digi-Reel packaging. TL074IDT is available in Cut Tape and Digi-Reel packaging. LF247DT is available in Tape & Reel packaging. LF347D is available in Tube packaging. Packaging format selection depends on assembly process requirements and inventory management practices.
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