TL074IDG4 Equivalent & Substitute Parts

Part Overview

The TL074IDG4 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 799 units remain in stock. The TL074IDG4 is designed for applications requiring low input bias current and low input offset voltage characteristics typical of J-FET amplifier architectures. Due to its obsolete status, identifying equivalent and substitute parts is essential for design continuity and long-term component availability.

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
Voltage - Supply Span (Min)	10	V
Voltage - Supply Span (Max)	30	V
Operating Temperature	-40 to 85	°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

Substitute parts for the TL074IDG4 are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution logic is determined by the following parameters:

Critical Matching Parameters:

Amplifier Type (J-FET architecture required for equivalent substitution)
Number of Circuits (4 independent circuits)
Package / Case (14-SOIC form factor)
Mounting Type (Surface Mount)
Supply Voltage Range compatibility (minimum 10V to maximum 30V overlap)
Operating Temperature Range (minimum -40°C capability)

Substitution Categories:

Category 1: Direct Equivalents (J-FET, 4-Circuit, 14-SOIC, Active Status) Parts meeting all critical parameters with active product status: TL074IDR, ADTL084ARZ-REEL, LF247DT, LF347DT

Category 2: Functional Equivalents (J-FET, 4-Circuit, 14-SOIC, Obsolete Status) Parts meeting all critical parameters but with obsolete status: TL074BCD

Category 3: Alternative Manufacturers (J-FET, 4-Circuit, 14-SOIC, Active Status) Parts from different manufacturers with J-FET architecture: TL074ID (STMicroelectronics), LF347D (STMicroelectronics)

Category 4: Partial Compatibility (General Purpose Amplifier, 4-Circuit, 14-SOIC) Parts with different amplifier type but same circuit count and package: AS324MTR-E1, LM224D, LM224DT

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (mV)	Supply Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Product Status
TL074IDG4	Texas Instruments	J-FET	13	5.25	65	3	1.4	10	30	-40 to 85	Obsolete
TL074ID	STMicroelectronics	J-FET	13	3	20	3	1.4	6	36	-40 to 105	Active
TL074IDR	Texas Instruments	J-FET	13	5.25	65	3	1.4	10	30	-40 to 85	Active
TL074BCD	Texas Instruments	J-FET	13	5.25	65	2	1.4	10	30	0 to 70	Obsolete
ADTL084ARZ-REEL	Analog Devices Inc.	J-FET	20	5	2	1.5	1.2	8	36	-40 to 125	Active
AS324MTR-E1	Diodes Incorporated	General Purpose	—	—	20000	2	1	3	36	-40 to 85	Active
LF247DT	STMicroelectronics	J-FET	16	4	20	3	1.4	44	44	-40 to 105	Active
LF347D	STMicroelectronics	J-FET	16	3	20	3	1.4	44	44	0 to 70	Active
LF347DT	STMicroelectronics	J-FET	16	4	20	3	1.4	44	44	0 to 70	Active
LM224D	STMicroelectronics	General Purpose	0.4	1.2	20000	2	1.5	3	30	-40 to 105	Active
LM224DT	STMicroelectronics	General Purpose	0.4	1.3	20000	2	1.5	3	30	-40 to 105	Active

Engineering Selection Recommendations

Recommended Primary Substitutes (Active Status, J-FET Architecture):

TL074IDR (Texas Instruments) — Identical electrical specifications to TL074IDG4 with active product status. Packaging differs (Cut Tape & Digi-Reel vs. standard packaging), but electrical performance and supply voltage range are equivalent. Recommended for direct replacement in new designs and production continuity.
ADTL084ARZ-REEL (Analog Devices Inc.) — J-FET amplifier with superior performance characteristics: higher slew rate (20V/µs vs. 13V/µs), significantly lower input bias current (2pA vs. 65pA), and extended operating temperature range (-40°C to 125°C). Wider supply voltage range (8V to 36V) provides greater design flexibility. Suitable for applications requiring enhanced performance specifications.

Secondary Substitutes (J-FET Architecture, Active Status):

TL074ID (STMicroelectronics) — J-FET amplifier with identical slew rate and input offset voltage. Lower input bias current (20pA vs. 65pA) and wider supply voltage range (6V to 36V). Extended operating temperature range (-40°C to 105°C). Gain bandwidth product differs (3MHz vs. 5.25MHz), requiring circuit verification for bandwidth-critical applications.
LF247DT (STMicroelectronics) — J-FET amplifier with higher slew rate (16V/µs) and comparable gain bandwidth product (4MHz). Lower input bias current (20pA). Fixed supply voltage specification (44V) differs from TL074IDG4 variable range, limiting applicability to specific voltage requirements.

Alternative Consideration (General Purpose Amplifier):

AS324MTR-E1 (Diodes Incorporated) — General purpose amplifier with four circuits in 14-SOIC package. Significantly higher input bias current (20nA vs. 65pA) and lower slew rate characteristics. Suitable only for applications where J-FET input characteristics are not critical and general purpose amplifier performance is acceptable.

Compliance Status: All recommended substitutes maintain ROHS3 compliance, EAR99 ECCN classification, and identical HTSUS coding (8542.33.0001), ensuring regulatory and supply chain compatibility.

Frequently Asked Questions (FAQ)

Q1: Can TL074IDR be used as a direct replacement for TL074IDG4?

A: Yes. TL074IDR is electrically identical to TL074IDG4 with matching slew rate (13V/µs), gain bandwidth product (5.25MHz), input bias current (65pA), input offset voltage (3mV), and supply voltage range (10V to 30V). The primary difference is packaging format (Cut Tape & Digi-Reel vs. standard). Both are 14-SOIC surface mount packages with identical pinout and electrical performance. TL074IDR has active product status, making it the preferred choice for new designs.

Q2: What is the key difference between J-FET and General Purpose amplifier substitutes?

A: J-FET amplifiers (TL074IDG4, TL074IDR, ADTL084ARZ-REEL, LF247DT, LF347DT) feature extremely low input bias current (measured in picoamperes) and are optimized for high-impedance signal sources. General Purpose amplifiers (AS324MTR-E1, LM224D, LM224DT) have significantly higher input bias current (measured in nanoamperes) and lower slew rates. J-FET substitutes are recommended for applications requiring low input bias current. General purpose substitutes are suitable only when input bias current specifications are not critical.

Q3: Why does ADTL084ARZ-REEL have different supply voltage specifications than TL074IDG4?

A: ADTL084ARZ-REEL (Analog Devices) specifies a wider supply voltage range (8V to 36V) compared to TL074IDG4 (10V to 30V). This reflects different design margins and manufacturing specifications between manufacturers. ADTL084ARZ-REEL can operate at lower minimum voltages (8V vs. 10V) and higher maximum voltages (36V vs. 30V), providing greater flexibility in power supply design. Verify that your application's supply voltage falls within both the original specification and the substitute specification for safe operation.

Q4: Can LF247DT and LF347DT be used interchangeably with TL074IDG4?

A: LF247DT and LF347DT are J-FET amplifiers with compatible 14-SOIC packages and four circuits. However, they specify a fixed supply voltage of 44V, which differs significantly from TL074IDG4's 10V to 30V range. These parts are suitable only for applications designed for 44V supply operation. Additionally, their gain bandwidth product (3-4MHz) is lower than TL074IDG4 (5.25MHz), requiring verification for bandwidth-dependent circuits. Not recommended as general substitutes.

Q5: What is the significance of product status (Active vs. Obsolete)?

A: Active product status indicates ongoing manufacturing and long-term availability from the manufacturer. Obsolete status indicates the manufacturer has discontinued production. TL074IDG4 is obsolete with limited remaining inventory (799 units). Active substitutes (TL074IDR, ADTL084ARZ-REEL, LF247DT, LF347DT) ensure continued component availability for production and future design revisions. For new designs, active substitutes are strongly preferred to avoid future supply chain disruptions.

Q6: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance status, identical to TL074IDG4. This ensures compatibility with environmental regulations and supply chain requirements. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all J-FET substitutes, matching TL074IDG4. AS324MTR-E1 specifies MSL 3 (168 Hours), requiring different handling procedures during storage and assembly.

Q7: Which substitute offers the best overall performance improvement?

A: ADTL084ARZ-REEL (Analog Devices) provides the most significant performance enhancements: 54% higher slew rate (20V/µs vs. 13V/µs), 97% lower input bias current (2pA vs. 65pA), 50% lower input offset voltage (1.5mV vs. 3mV), and extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C). These improvements are beneficial for precision analog circuits, high-impedance signal conditioning, and wide temperature environment applications. Verify that the wider supply voltage range (8V to 36V) is compatible with your power supply design.

Q8: What packaging considerations apply to substitute selection?

A: All substitute parts use 14-SOIC (0.154", 3.90mm Width) surface mount packages, maintaining identical PCB footprint compatibility with TL074IDG4. Packaging format differences (Tube, Cut Tape & Digi-Reel, Tape & Reel) affect component handling and assembly processes but do not impact electrical performance or PCB layout. Verify that your assembly process supports the selected packaging format.

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