Is there a pin-compatible replacement for SN74HC04DR?

Yes, several pin-compatible hex inverters exist in SOIC-14, like SN74HCS04DR and SN74HCU04DR. However, they have different electrical features and require engineering review.

What risks should I check before replacing SN74HC04DR?

Verify the required supply voltage range (target is 2V-6V), input signal type (standard vs. Schmitt-trigger), and output drive requirements (buffered vs. unbuffered).

SN74HC04DR Alternatives, Datasheet & Cross Reference | Texas Instruments

SN74HC04DR is a standard hex inverter in a SOIC-14 package. Alternatives exist within the same logic family, but require careful review of input type, output drive, and supply voltage.

AI replacement insight

Electrical riskhigh

Many alternatives have different logic families (HCT, HCU) or voltage ranges.

Package risklow

The SOIC-14 package and '04' pinout are highly standardized.

Can it be replaced directly?

No exact drop-in replacement was found. SN74HCS04DR is a strong candidate but is an upgrade. Other alternatives have significant electrical differences requiring review.

Best replacement path

SN74HCS04DR is the best upgrade path, offering improved noise immunity and a wider temperature range while remaining pin-compatible.

Main risk

The main risk is substituting with a part that has an incompatible logic family, output type (e.g., open-drain), or a more restrictive supply voltage range.

Recommended alternatives

Pin-compatible upgrade with Schmitt-trigger inputs for improved noise immunity and a wider temperature range.

View details

Alternative comparison matrix

Feature / factor	SN74HC04DR	SN74HCS04DR	SN74HCU04DR	SN74HCT04DR	Compatibility / risk
Package	SOIC-14	SOIC-14	SOIC-14	SOIC-14	SOIC-14 — Package matches.; SN74HCU04DR: Package matches.; SN74HCT04DR: Package matches.
Interface	Standard	Schmitt-Trigger	Unbuffered	TTL-compatible	Schmitt-Trigger / Unbuffered / TTL-compatible — Candidate has Schmitt-trigger inputs for better noise immunity.; SN74HCU04DR: Candidate has unbuffered outputs, affecting drive strength.; SN74HCT04DR: Inputs are TTL-level compatible, not standard CMOS.
Voltage	2V to 6V	2V to 6V	2V to 6V	4.5V to 5.5V	2V to 6V / 4.5V to 5.5V — Supply voltage range matches.; SN74HCU04DR: Supply voltage range matches.; SN74HCT04DR: Narrower supply voltage range.
Temperature	-40°C to 85°C	-40°C to 125°C	-40°C to 85°C	-40°C to 85°C	-40°C to 125°C / -40°C to 85°C — Wider operating temperature range.; SN74HCU04DR: Operating temperature matches.; SN74HCT04DR: Operating temperature matches.

Application & sourcing insights

Questions & answers

SN74HCS04DR is an excellent alternative, offering an upgrade with Schmitt-trigger inputs and a wider temperature range while being pin-compatible.