SN74LVC245APWR

SN74LVC245APWR is the tape-and-reel TSSOP-20 ordering code for the Texas Instruments SN74LVC245A octal bus transceiver, listed as ACTIVE. Verified figures: operation from 1.65 V to 3.6 V, a maximum propagation delay of 6.3 ns at 3.3 V, output drive of 24 mA and three-state outputs governed by a direction pin and an output-enable pin, across eight channels. The selection point is byte-wide buffering between a processor bus and slower or heavier-loaded peripherals in the 1.8 V to 3.3 V world: one package moves a whole data byte with controlled drive instead of eight discrete gates. Selection advice: one supply does not rule out translation — the maker’s own feature list for this device (§9.3 of the datasheet) allows down voltage translation, 5 V to 3.3 V and 5 V or 3.3 V to 1.8 V, through inputs that accept levels up to 5.5 V, so it covers the step-down direction on a single rail. It is not a general-purpose dual-supply translator: both ports share one VCC and cannot be powered from independent rails. For other voltage-domain combinations, check the driving device’s guaranteed VOH/VOL against this device’s VIH/VIL, and verify output levels under the required load against the receiver’s thresholds; do not assume arbitrary up- or down-translation compatibility. Use a suitable dual-supply translator when independent port rails are required. Parameters verified against the TI SN74LVC245A datasheet and product page.