
UTC(Unisonic Tech)
LM321G-AE5-R is a close SOT-23-5 LM321 op amp candidate needing pinout review.
LM321 is a single low-power op amp. The only close catalog candidate here is another LM321 SOT-23-5 op amp, but pinout still needs review.
CMRR, offset, input range, and swing need checks
same package, but pinout not verified
analog op amp, no firmware interface
candidate lifecycle is not clearly stated
No verified pin-compatible replacement is proven from the provided evidence.
Review LM321G-AE5-R first because it matches function, package, supply range, Iq, and slew rate.
Pinout and analog limits are not fully verified.

UTC(Unisonic Tech)
LM321G-AE5-R is a close SOT-23-5 LM321 op amp candidate needing pinout review.
| Feature / factor | LM321 | LM321G-AE5-R | Alt 2 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Application | single op amp | single op amp | single op amp — same function | ||
| Package | SOT-23-5 | SOT-23-5 | SOT-23-5 — same package | ||
| Pinout | 5 pins | 5 pins | 5 pins — pin functions not shown | ||
| Voltage | 24 V | 3 V to 32 V | 3 V to 32 V — covers 24 V | ||
| Temperature | 0 C to 70 C | -40 C to 85 C | -40 C to 85 C — wider range | ||
| Current | 430 uA | 430 uA | 430 uA — Iq listed same |
LM321G-AE5-R is the best candidate in this set, but it needs pinout and analog-spec review.