Is there a pin-compatible replacement for SN74HC14DR?

Yes, several parts like SN74HCS04DR share the same SOIC-14 package and standard pinout. However, you must verify electrical parameters like input type (Schmitt-trigger) and voltage range.

What risks should I check before replacing SN74HC14DR?

Key risks include: 1) ensuring the replacement has Schmitt-trigger inputs for noise immunity, 2) verifying the supply voltage range matches your application (e.g., 3.3V or 5V), and 3) confirming the logic family is compatible.

SN74HC14DR Alternatives, Datasheet & Cross Reference | Texas Instruments

SN74HC14DR is a popular hex Schmitt-trigger inverter in a SOIC-14 package, used for signal conditioning. When searching for a replacement, key factors are the Schmitt-trigger inputs and 2V-6V supply range.

AI replacement insight

Electrical riskmedium

Must match both supply voltage range and Schmitt-trigger input type.

Package risklow

SOIC-14 with standard '14' logic pinout is common.

Firmware risklow

Not applicable for this simple logic device.

Can it be replaced directly?

A direct, drop-in replacement is likely SN74HCS04DR. Other parts like SN74HCT14DR are pin-compatible but have a limited 5V supply range, while SN74HC04DR lacks the critical Schmitt-trigger inputs.

Best replacement path

The most robust replacement path is to use SN74HCS04DR, which is a modern, pin-compatible part with Schmitt-trigger inputs and improved temperature performance.

Main risk

The main risk is substituting with a part that lacks Schmitt-trigger inputs (like SN74HC04DR), which can cause circuit instability with noisy or slow-rising signals.

Recommended alternatives

A modern hex Schmitt-trigger inverter with a wider temperature range, offering a potential upgrade path.

View details

Alternative comparison matrix

Feature / factor	SN74HC14DR	SN74HCS04DR	SN74HCT14DR	SN74HC04DR	Compatibility / risk
Package	SOIC-14	SOIC-14	SOIC-14	SOIC-14	SOIC-14 — Package matches.; SN74HCT14DR: Package matches.; SN74HC04DR: Package matches.
Interface	Schmitt Trigger	Schmitt-Trigger	Schmitt Trigger	Standard	Schmitt-Trigger / Schmitt Trigger / Standard — Schmitt-trigger inputs match target requirement.; SN74HCT14DR: Schmitt-trigger inputs match.; SN74HC04DR: Lacks Schmitt-trigger inputs, critical functional difference.
Voltage	2V to 6V	2V to 6V	4.5V to 5.5V	2V to 6V	2V to 6V / 4.5V to 5.5V — Supply voltage range matches.; SN74HCT14DR: Narrower supply voltage range, only works for 5V logic.; SN74HC04DR: Supply voltage range matches.
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.; SN74HCT14DR: Operating temperature range matches.; SN74HC04DR: Operating temperature range matches.

Application & sourcing insights

Questions & answers

SN74HCS04DR is an excellent modern alternative, offering the same function and pinout with an even wider operating temperature range, making it a potential upgrade.