
MICROCHIP
Official industrial grade version of the target, offering a wider operating temperature range.
LAN8742A-CZ-TR is a 10/100 Mbps Ethernet PHY transceiver from Microchip in a 24-VQFN package. For applications requiring a wider operating temperature, the industrial-grade LAN8742AI-CZ-TR serves as a direct, pin-compatible upgrade.
Identical electrical specifications, except for wider temperature range.
Identical 24-VQFN package ensures form and fit compatibility.
As a family variant, no firmware changes are expected.
Yes, the LAN8742AI-CZ-TR is a direct, pin-compatible replacement for the LAN8742A-CZ-TR, offering a wider operating temperature range.
Upgrade to the industrial temperature version, LAN8742AI-CZ-TR, which is a direct pin-compatible replacement.
The risk is very low as the recommended alternative is an official upgrade path from the same manufacturer.

MICROCHIP
Official industrial grade version of the target, offering a wider operating temperature range.
| Feature / factor | LAN8742A-CZ-TR | LAN8742AI-CZ-TR | Alt 2 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Temperature | 0°C to +70°C | -40°C to +85°C | -40°C to +85°C — Candidate has wider industrial temperature range. | ||
| Package | 24-VQFN | 24-VQFN | 24-VQFN — Package matches. | ||
| Interface | RMII | RMII | RMII — Interface protocol matches. | ||
| Voltage | 1.8V to 3.3V (I/O) | 1.8V to 3.3V (I/O) | 1.8V to 3.3V (I/O) — Supply voltage range matches. | ||
| Lifecycle | Active | Active | Active — Both parts are active. |
The best alternative for LAN8742A-CZ-TR is its industrial grade version, LAN8742AI-CZ-TR. It is a form, fit, and function compatible upgrade with a wider temperature range.