The 74HCT377PW,112 comes in a 20-TSSOP (4.40 mm width) surface-mount package. The 0.65 mm pitch and exposed pad-free body mean a two-layer board with standard via fan-out handles the routing — no buried vias or high-layer-count stack-up needed for this footprint. Operating temperature range is -40°C to +125°C (TA), covering the full industrial band plus the hot end of automotive under-hood ambient.
Clock-to-output timing and fan-out
Positive-edge triggered with a maximum clock frequency of 53 MHz — the propagation delay of 32 ns at 4.5 V and 50 pF load sets the data-to-output latency for bus-register applications. The 4 mA (high) and 5.2 mA (low) output drive sinks enough current to switch standard TTL loads or drive short PCB traces up to a few inches without a buffer. Quiescent current is 8 µA, and input capacitance is 3.5 pF per channel — both low enough that eight parallel inputs on a shared bus add under 30 pF of load, preserving signal integrity at the rated clock rate.
Lifecycle and compliance status
The 74HCT series is a mature logic family, but the TSSOP package keeps it viable for current designs that need 5 V compatibility in a smaller footprint than SOIC.