
Texas Instruments
A functional alternative in the same package, but with a different internal architecture that may affect performance.
Find suitable replacements for the TXB0108RGYR, an 8-bit bidirectional voltage translator from Texas Instruments. This guide reviews pin-compatible and functional alternatives, highlighting key differences in performance and architecture.
Architecture (buffered vs. pass-gate) and ESD rating differences require validation.
The VQFN-20 package is common and several candidates match the form factor.
These are simple logic ICs with no firmware dependency.
Direct replacement for TXB0108RGYR should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Start with Datasheet verified or Strong match candidates for TXB0108RGYR, then review parametric alternatives for package and electrical fit.
The main risk is functional incompatibility. The target TXB series is a buffered translator, while alternatives like the TXS series use a different pass-gate architecture, affecting drive strength.

Texas Instruments
A functional alternative in the same package, but with a different internal architecture that may affect performance.
| Feature / factor | TXB0108RGYR | PI4ULS5V108ZBAEX | TXS0108ERGYR | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | VQFN (20) | VQFN-20 | VQFN-20 | VQFN-20 — Package and pinout match target based on datasheet.; TXS0108ERGYR: Package dimensions match. | |
| Pinout | Pin-compatible | Pin-compatible | - | Pin-compatible — Datasheet confirms pin-for-pin compatibility. | |
| Voltage | 1.2V-3.6V (A), 1.65V-5.5V (B) | 0.9V-5.0V (A/B) | 1.2V to 3.6V | 0.9V-5.0V (A/B) / 1.2V to 3.6V — Wider, more flexible operating voltage range.; TXS0108ERGYR: VCCA and VCCB ranges match. | |
| Data Rate | 100 Mbps | >100 Mbps | 110 Mbps | >100 Mbps / 110 Mbps — Data rate is comparable to target.; TXS0108ERGYR: Slightly higher max data rate. | |
| Architecture | Buffered with direction sensing | - | Pass-gate with one-shot | Pass-gate with one-shot — Target is buffered. Candidate is not for high drive strength applications. | |
| Esd Protection | ±15 kV (B Port) | - | Standard HBM/CDM | Standard HBM/CDM — Target has enhanced ESD protection on B-port. |
Verified drop-in options for TXB0108RGYR are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.