Is there a pin-compatible replacement for TL074IDR?

Several quad op-amps like the MC33074ADR2G share the standard 14-SOIC package and pinout. While mechanically compatible, it is not electrically a drop-in replacement due to its bipolar input versus the TL074IDR's JFET input. Always verify the pinout from the datasheet.

What risks should I check before replacing TL074IDR?

The main risk is the input stage. The TL074IDR is a JFET-input op-amp with very low input bias current (pA range). Many alternatives are bipolar with much higher bias current (nA range), which can affect performance in high-impedance designs. Also verify supply voltage, bandwidth, and slew rate.

TL074IDR Alternatives, Datasheet & Cross Reference | Texas Instruments

The TL074IDR is a low-noise, quad JFET-input operational amplifier from Texas Instruments, known for its high slew rate and low distortion. Finding a direct replacement requires careful matching of its JFET input characteristics.

AI replacement insight

Electrical riskhigh

JFET vs. Bipolar input type mismatch causes a large difference in input bias current, affecting high-impedance circuits.

Package risklow

The 14-SOIC package is standard, but pinout should always be confirmed.

Can it be replaced directly?

No direct drop-in replacement was found. The onsemi MC33074ADR2G is a functional alternative but has a different input type (bipolar vs JFET) which requires circuit review.

Best replacement path

Consider onsemi's MC33074A series as a functional alternative, but prioritize finding another JFET-input quad op-amp with a compatible supply voltage.

Main risk

The primary risk is substituting a bipolar-input op-amp for the JFET-input TL074IDR, leading to significantly higher input bias current.

Recommended alternatives

Functional alternative in the same package with similar speed, but its bipolar input stage is a critical difference from the target's JFET input.

View details

Alternative comparison matrix

Feature / factor	TL074IDR	MC33074ADR2G	Compatibility / risk
Package	14-SOIC	14-SOIC	14-SOIC — Same package and pin count.
Voltage	18 V to 30 V	3.0 V to 44 V	3.0 V to 44 V — Wider supply range covers target's requirements.
Temperature	-40°C to 85°C	-40°C to +85°C	-40°C to +85°C — Industrial temperature range matches target.
Interface	JFET	Bipolar	Bipolar — Bipolar input has >> input bias current than target's JFET.
Application	3 MHz	4.5 MHz	4.5 MHz — Higher gain bandwidth product.

Application & sourcing insights

Questions & answers

The onsemi MC33074ADR2G is a potential functional alternative with a similar package and temperature range. However, it has a bipolar input stage, resulting in much higher input bias current, which must be evaluated for your specific circuit.