TL074CDG4 Equivalent & Substitute Parts

Part Overview

The TL074CDG4 is a J-FET input operational amplifier with four independent circuits in a 14-SOIC surface mount package, manufactured by Texas Instruments. This device is classified as obsolete, though 1153 pieces remain in new original stock. The TL074CDG4 is designed for applications requiring low input bias current, low input offset voltage, and moderate slew rate performance in a compact quad-channel configuration.

Due to its obsolete status, identifying equivalent and substitute parts is necessary for design continuity, long-term supply chain planning, and new production runs. Substitute parts must maintain electrical compatibility across critical parameters including amplifier type, circuit count, supply voltage range, and package form factor.

Key Parameters

Parameter	TL074CDG4 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 (x4 Channels)	mA
Voltage - Supply Span (Min)	10	V
Voltage - Supply Span (Max)	30	V
Operating Temperature	0 to 70	°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

Substitute parts for the TL074CDG4 are grouped into three categories based on substitution compatibility:

Category 1: Direct Texas Instruments Variants (Same Base Product) Parts TL074CD, TL074CDR, and TL074BCD share the identical base product number TL074 and maintain all critical electrical parameters. These variants differ only in packaging format (Tube, Cut Tape & Digi-Reel, or Tube) and product status. Substitution within this group is valid when the application permits alternative packaging configurations.

Category 2: Cross-Manufacturer J-FET Amplifiers (Electrical Equivalence) Parts TL074CDT (STMicroelectronics), ADTL084ARZ-REEL7 (Analog Devices), LF247DT, LF347D, and LF347DT (STMicroelectronics) are J-FET input amplifiers with four circuits in 14-SOIC packaging. These parts maintain the core J-FET amplifier topology and four-circuit configuration. Substitution is valid when the following parameters fall within acceptable design margins: slew rate (13–20 V/µs range), gain bandwidth product (3–5 MHz range), input bias current (2–65 pA range), supply voltage span (minimum 8–10 V, maximum 30–36 V), and operating temperature range compatibility.

Category 3: General Purpose Amplifiers (Functional Substitution) Parts ADA4004-4ARZ-RL (Analog Devices) and LM2902EDR2G (onsemi) are general purpose four-circuit amplifiers in 14-SOIC packaging. These parts differ fundamentally in amplifier type (general purpose rather than J-FET) and exhibit different electrical characteristics. Substitution is valid only when the application does not require the specific low input bias current or J-FET input characteristics of the original design.

Key Parameters Determining Substitution:

Amplifier type (J-FET vs. general purpose)
Number of circuits (must be 4)
Package form factor (14-SOIC)
Supply voltage span compatibility
Input bias current and offset voltage ranges
Slew rate and gain bandwidth product ranges
Operating temperature range

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (mV)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Status
TL074CDG4	Texas Instruments	J-FET	13	5.25	65	3	10	30	0 to 70	Obsolete
TL074CD	Texas Instruments	J-FET	13	5.25	65	3	10	30	0 to 70	Obsolete
TL074CDR	Texas Instruments	J-FET	13	5.25	65	3	10	30	0 to 70	Active
TL074BCD	Texas Instruments	J-FET	13	5.25	65	2	10	30	0 to 70	Obsolete
TL074CDT	STMicroelectronics	J-FET	13	3	30	3	6	36	0 to 70	Active
ADTL084ARZ-REEL7	Analog Devices	J-FET	20	5	2	1.5	8	36	-40 to 125	Active
LF247DT	STMicroelectronics	J-FET	16	4	20	3	44	44	-40 to 105	Active
LF347D	STMicroelectronics	J-FET	16	3	20	3	44	44	0 to 70	Active
LF347DT	STMicroelectronics	J-FET	16	4	20	3	44	44	0 to 70	Active
ADA4004-4ARZ-RL	Analog Devices	General Purpose	2.7	12	40000	0.04	10	30	-40 to 125	Active
LM2902EDR2G	onsemi	General Purpose	—	—	90000	2	3	32	-40 to 105	Active

Engineering Selection Recommendations

For Direct Replacement (Preferred): TL074CDR is the recommended substitute when design specifications permit. This part maintains identical electrical parameters to the TL074CDG4 while offering active product status and significantly higher inventory availability (113,500 pieces). Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 rating. The only difference is packaging format (Cut Tape & Digi-Reel vs. the original DG4 variant).

For Active Product Continuity: When long-term supply assurance is required, ADTL084ARZ-REEL7 (Analog Devices) provides an active J-FET quad amplifier with superior specifications in several parameters: lower input bias current (2 pA vs. 65 pA), lower input offset voltage (1.5 mV vs. 3 mV), higher slew rate (20 V/µs vs. 13 V/µs), and extended operating temperature range (-40°C to 125°C vs. 0°C to 70°C). This part is suitable for designs where improved performance margins are acceptable. Inventory availability is substantial (44,200 pieces).

For Broad Supply Voltage Applications: TL074CDT (STMicroelectronics) extends the minimum supply voltage to 6 V and maximum to 36 V, compared to the TL074CDG4 range of 10–30 V. This part maintains J-FET input characteristics and is active with high inventory (107,800 pieces). The gain bandwidth product is reduced to 3 MHz, which may impact frequency response in bandwidth-critical applications.

For General Purpose Applications: LM2902EDR2G (onsemi) is suitable only when the application does not depend on J-FET input characteristics. This general purpose amplifier offers the widest supply voltage range (3–32 V) and extended operating temperature (-40°C to 105°C). Input bias current is significantly higher (90 nA vs. 65 pA), making this option unsuitable for high-impedance signal sources.

Compliance Considerations: All recommended substitutes maintain ROHS3 compliance and REACH unaffected status. MSL ratings are consistent (MSL 1 for all J-FET variants; MSL 3 for ADA4004-4ARZ-RL). All parts are classified under ECCN EAR99 and HTSUS 8542.33.0001.

Frequently Asked Questions (FAQ)

Q: Can I use TL074CDR as a direct replacement for TL074CDG4? A: Yes. TL074CDR is electrically identical to TL074CDG4 across all specified parameters. The difference is packaging format: TL074CDR is supplied in Cut Tape & Digi-Reel format, while TL074CDG4 uses a different packaging variant. Both are 14-SOIC surface mount packages with identical pinout and electrical performance.

Q: What is the primary difference between J-FET and general purpose amplifiers in this comparison? A: J-FET input amplifiers (TL074CDG4, ADTL084ARZ-REEL7, LF347DT) feature extremely low input bias current (2–65 pA range), making them suitable for high-impedance signal sources and precision instrumentation. General purpose amplifiers (ADA4004-4ARZ-RL, LM2902EDR2G) have input bias currents in the nanoampere range (40–90 nA), which is acceptable for most standard applications but unsuitable for high-impedance circuits.

Q: Is ADTL084ARZ-REEL7 a suitable substitute if my design operates at 0°C to 70°C? A: Yes. ADTL084ARZ-REEL7 has an operating temperature range of -40°C to 125°C, which encompasses the 0°C to 70°C requirement. The part will function correctly within your specified temperature range. The extended range provides additional design margin.

Q: Why do LF247DT and LF347DT show a supply voltage span of 44 V minimum and 44 V maximum? A: The provided data indicates a fixed supply voltage specification of ±44 V (dual supply configuration), which differs from the single supply or split supply ranges of other parts. Verify the actual supply voltage requirements of your application before selecting this part.

Q: Can I substitute TL074CDG4 with LM2902EDR2G in a precision audio preamplifier? A: No. LM2902EDR2G is a general purpose amplifier with input bias current of 90 nanoamperes, compared to TL074CDG4's 65 picoamperes. This 1000-fold difference in input bias current will introduce unacceptable noise and offset errors in precision audio applications. Use a J-FET input amplifier such as ADTL084ARZ-REEL7 or LF347DT instead.

Q: What is the significance of product status (Active vs. Obsolete)? A: Active products have ongoing manufacturing and supply commitments from the manufacturer. Obsolete products have ceased production, and supply is limited to existing inventory. For new designs or long-term production, select active parts (TL074CDR, ADTL084ARZ-REEL7, LF347DT, LM2902EDR2G) to ensure future availability.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All parts listed in this comparison are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: What packaging formats are available for TL074 variants? A: TL074CD is supplied in Tube packaging; TL074CDR is supplied in Cut Tape & Digi-Reel format; TL074BCD is supplied in Tube packaging. All use the same 14-SOIC physical package. Select based on your assembly process requirements: Tube for manual handling, Cut Tape & Digi-Reel for automated pick-and-place systems.

Q: How do I determine if a substitute part will work in my existing PCB layout? A: All substitute parts in this comparison use the 14-SOIC (0.154", 3.90mm Width) package with identical pinout. They are physically and electrically interchangeable at the PCB level. No layout modifications are required for parts within the same package family.

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