TL064IDG4 Equivalent & Substitute Parts

Part Overview

The TL064IDG4 is a J-FET input operational amplifier integrated circuit manufactured by Texas Instruments, configured as a 4-circuit device in a 14-SOIC surface mount package. This component is classified as a Last Time Buy product, indicating discontinued production with limited remaining inventory. The TL064IDG4 serves applications requiring low input bias current and low input offset voltage characteristics typical of J-FET amplifier designs. Due to its Last Time Buy status, equivalent and substitute parts are necessary for ongoing design support and production continuity.

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)	10	V
Voltage - Supply Span (Max)	30	V
Operating Temperature Range	-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

Substitution of the TL064IDG4 is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

Amplifier Type: J-FET input topology required for low input bias current performance
Number of Circuits: 4-circuit configuration
Slew Rate: 3.5 V/µs minimum
Gain Bandwidth Product: 1 MHz minimum
Input Bias Current: 30 pA maximum
Input Offset Voltage: 3 mV maximum
Supply Current: 200 µA per 4 channels maximum
Output Current per Channel: 20 mA minimum
Supply Voltage Range: 10 V to 30 V operating window

Mechanical Compatibility Criteria:

Package: 14-SOIC surface mount configuration
Mounting Type: Surface mount
Pin count and footprint: 14-pin SOIC standard

Compliance Criteria:

RoHS3 compliance required
Moisture Sensitivity Level 1 (Unlimited)

Substitute parts are grouped into two categories: direct equivalents (matching all electrical and mechanical parameters) and functional upgrades (enhanced performance parameters while maintaining compatibility).

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
TL064IDG4	Texas Instruments	J-FET	3.5	1	30	10	30	-40 to 85	Last Time Buy
TL064ID	STMicroelectronics	J-FET	3.5	1	30	6	36	-40 to 105	Obsolete
TL064IDR	Texas Instruments	J-FET	3.5	1	30	10	30	-40 to 85	Active
TL064IDT	STMicroelectronics	J-FET	3.5	1	30	6	36	-40 to 105	Active
LF247DT	STMicroelectronics	J-FET	16	4	20	44	44	-40 to 105	Active
LF347D	STMicroelectronics	J-FET	16	3	20	44	44	0 to 70	Active
LF347DT	STMicroelectronics	J-FET	16	4	20	44	44	0 to 70	Active
LM2902AQS14-13	Diodes Incorporated	General Purpose	0.3	0.7	20000	2	36	-40 to 125	Active
LM2902VDR2G	onsemi	General Purpose	—	1	90000	3	32	-40 to 125	Active
MC3303DR2G	onsemi	General Purpose	0.6	1	200000	3	36	-40 to 85	Active
MC3403DR2G	onsemi	General Purpose	0.6	1	200000	3	36	0 to 70	Active

Engineering Selection Recommendations

Direct Equivalents (Recommended for Replacement):

The TL064IDR (Texas Instruments, Active status) is the primary direct equivalent. This part maintains identical electrical specifications to the TL064IDG4 while offering Active product status, ensuring long-term availability and supply chain continuity. The packaging format differs (Cut Tape & Digi-Reel versus Tube), but the 14-SOIC footprint and electrical performance are identical.

The TL064IDT (STMicroelectronics, Active status) provides an alternative direct equivalent with expanded supply voltage range (6 V to 36 V versus 10 V to 30 V) and extended operating temperature range (-40°C to 105°C versus -40°C to 85°C). This part is suitable for applications requiring broader environmental specifications.

Functional Upgrades (Enhanced Performance):

The LF247DT and LF347DT (STMicroelectronics, Active status) represent J-FET amplifier upgrades with significantly improved slew rate (16 V/µs versus 3.5 V/µs) and higher gain bandwidth product (4 MHz versus 1 MHz). These parts maintain J-FET input characteristics with lower input bias current (20 pA versus 30 pA). However, they require symmetric ±22 V supply voltages (44 V total span), which differs from the TL064IDG4 single-supply capability.

General Purpose Alternatives (Limited Compatibility):

The LM2902VDR2G, MC3303DR2G, and MC3403DR2G are general purpose amplifiers with 4-circuit configurations in 14-SOIC packages. These parts do not meet the J-FET input bias current specification (input bias current exceeds 30 pA by orders of magnitude) and are not recommended as direct substitutes for applications requiring J-FET performance characteristics.

All recommended substitute parts maintain RoHS3 compliance and Moisture Sensitivity Level 1 (Unlimited) status consistent with the TL064IDG4.

Frequently Asked Questions (FAQ)

Q: Can the TL064IDR directly replace the TL064IDG4 in production?

A: Yes. The TL064IDR is electrically and mechanically identical to the TL064IDG4. The only difference is packaging format (Cut Tape & Digi-Reel versus Tube). Both parts are 14-SOIC surface mount packages with identical pin configurations and electrical specifications. The TL064IDR offers the advantage of Active product status.

Q: What is the difference between TL064IDT and TL064IDR?

A: Both are direct equivalents with identical core electrical specifications (3.5 V/µs slew rate, 1 MHz GBW, 30 pA input bias current). The TL064IDT offers expanded supply voltage range (6 V to 36 V versus 10 V to 30 V) and extended operating temperature range (-40°C to 105°C versus -40°C to 85°C). The TL064IDT is manufactured by STMicroelectronics, while the TL064IDR is manufactured by Texas Instruments. Selection depends on supply voltage and temperature requirements of the application.

Q: Are the LF247DT and LF347DT suitable replacements?

A: The LF247DT and LF347DT are J-FET amplifiers with superior performance specifications (16 V/µs slew rate, 3-4 MHz GBW, 20 pA input bias current). However, they require symmetric ±22 V supply voltages, which differs from the TL064IDG4 supply range of 10 V to 30 V. These parts are suitable only for applications where the supply voltage requirement can be accommodated and where the enhanced performance is beneficial.

Q: Why are general purpose amplifiers like LM2902VDR2G not recommended?

A: General purpose amplifiers have input bias currents in the nanoampere range (90 nA to 200 nA), which is approximately 3,000 to 6,700 times higher than the TL064IDG4 specification of 30 pA. Applications requiring J-FET input characteristics for low input bias current performance cannot use general purpose amplifiers as direct substitutes.

Q: Is the 14-SOIC package standard across all substitute parts?

A: Yes. All substitute parts listed use the 14-SOIC (0.154", 3.90mm Width) surface mount package. This ensures mechanical compatibility and identical PCB footprints. Packaging format (Tube, Cut Tape & Digi-Reel, or Tape & Reel) affects handling and supply chain logistics but does not affect electrical performance or physical mounting.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain RoHS3 compliance and Moisture Sensitivity Level 1 (Unlimited) status, consistent with the TL064IDG4. This ensures compliance with environmental and regulatory requirements.

Q: What is the significance of "Last Time Buy" status for the TL064IDG4?

A: Last Time Buy status indicates that the manufacturer has discontinued production and will not accept new orders after a specified date. Existing inventory is limited. This status necessitates identification of equivalent or substitute parts to ensure design continuity and production support beyond the Last Time Buy cutoff date.

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