TL070IDRE4 Equivalent & Substitute Parts

Part Overview

The TL070IDRE4 is a J-FET input operational amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device is classified as obsolete, which necessitates identification of equivalent substitute components for ongoing design support and procurement. The TL070IDRE4 delivers single-circuit amplification with a slew rate of 13V/µs and gain bandwidth product of 5.25 MHz, suitable for precision analog signal processing applications requiring low input bias current and low input offset voltage.

Substiute Parts

TL070IDRE4

Texas InstrumentsIn Stock: 930TL070IDRE4 Datasheet

Current PartRFQ

TL081CDT

STMicroelectronicsIn Stock: 3681TL081CDT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL070IDRE4 is determined by strict equivalence in the following electrical and mechanical parameters:

Critical Matching Parameters:

• Amplifier topology: J-FET input configuration
• Circuit count: Single circuit (1 channel)
• Package type: 8-SOIC surface mount form factor
• Supply voltage range compatibility: Minimum 7V to maximum 36V
• Input offset voltage: 3 mV maximum
• Supply current: 1.4 mA nominal
• Input bias current: Must not exceed specified limits for the application
• Operating temperature range: Must support −40°C to 85°C or subset thereof
• Regulatory compliance: ROHS3 compliance required

The TL081CDT manufactured by STMicroelectronics qualifies as a substitute based on matching J-FET amplifier topology, single-circuit configuration, identical 8-SOIC package geometry, overlapping supply voltage range (6V to 36V), and equivalent input offset voltage specification. Both devices are surface mount components with ROHS3 compliance and REACH unaffected status.

Parameter Comparison

Engineering Selection Recommendations

The TL081CDT is an active substitute for the obsolete TL070IDRE4. Both devices share identical J-FET amplifier topology, single-circuit configuration, and 8-SOIC package footprint. Both meet ROHS3 compliance and REACH unaffected regulatory requirements.

The TL081CDT offers superior slew rate performance (16V/µs versus 13V/µs) and lower input bias current (20 pA versus 65 pA), representing performance improvements over the original part. The TL081CDT maintains equivalent input offset voltage (3 mV) and supply current (1.4 mA) specifications.

The operating temperature range of the TL081CDT (0°C to 70°C) is narrower than the TL070IDRE4 (−40°C to 85°C). Applications requiring operation below 0°C or above 70°C must evaluate alternative substitutes or confirm TL081CDT suitability for the specific thermal environment.

The minimum supply voltage of the TL081CDT is 6V, which is lower than the TL070IDRE4 minimum of 7V, providing additional design flexibility for lower-voltage applications. Maximum supply voltage remains 36V for both devices.

Frequently Asked Questions (FAQ)

Q: Can the TL081CDT directly replace the TL070IDRE4 in existing designs?

A: The TL081CDT is pin-compatible and functionally equivalent for J-FET amplifier applications. Both devices use identical 8-SOIC package geometry and pinout. Substitution is valid provided the application operating temperature range does not exceed 0°C to 70°C. If the original design requires operation below 0°C or above 70°C, thermal environment compatibility must be confirmed.

Q: What are the key electrical differences between these parts?

A: The TL081CDT exhibits higher slew rate (16V/µs versus 13V/µs) and lower input bias current (20 pA versus 65 pA). The gain bandwidth product differs (4 MHz versus 5.25 MHz). Input offset voltage and supply current are equivalent. These differences represent performance improvements in the substitute part.

Q: Are both parts surface mount compatible?

A: Yes. Both the TL070IDRE4 and TL081CDT are surface mount devices in 8-SOIC package format with identical 0.154-inch (3.90mm) width. PCB footprints and reflow soldering processes are identical.

Q: What is the regulatory compliance status of the TL081CDT?

A: The TL081CDT is ROHS3 compliant and REACH unaffected, matching the compliance profile of the TL070IDRE4. Both devices carry Moisture Sensitivity Level 1 (Unlimited).

Q: Why is the TL070IDRE4 classified as obsolete?

A: The TL070IDRE4 is no longer manufactured by Texas Instruments. The TL081CDT from STMicroelectronics provides equivalent functionality and is actively produced, making it the appropriate substitute for new designs and ongoing procurement.