Eight-bit register with master reset — 110 MHz edge rate
Rated for 110 MHz clock frequency, this part handles high-speed data-path applications like address latching, status-register buffering, or pipeline stages in FPGA-glue logic and microcontroller expansion buses. The supply range spans 2 V to 5.5 V, so it interfaces directly with both logic families without external level shifters. Operating temperature covers -40°C to 125°C, qualifying it for industrial environments: outdoor telecom cabinets, motor-drive control boards, engine-bay electronics, and factory-automation I/O modules.
110 MHz clock — bus margin against slower logic
At 110 MHz, the SN74AHC273NSR provides a clock-speed advantage over the SN74LS175NS (40 MHz) and the SN74LS378N (40 MHz) from the 74LS series. Propagation delay is 11 ns at 5 V with a 50 pF load — tight enough for back-to-back registered transfers without dead cycles. The 74F174PC (80 MHz, 10 ns) comes closer in speed but lacks the wide supply range and industrial temperature rating.
Active production — no LTB clock ticking
The part is ROHS3 compliant, so it passes EU material-restriction checks without an exemption review. Because the 74AHC family remains a standard-logic workhorse, second-source availability from other manufacturers is typical for this function.
Output drive and static draw — what they mean for the BOM
Each output sinks or sources 8 mA (I_OH / I_OL), which is enough to drive a standard CMOS logic input, an LED indicator through a series resistor, or a low-power relay driver with external transistor gain. Quiescent current is 4 µA typical. In battery-backed or always-on sections, that draw is negligible. Input capacitance of 2.5 pF keeps the clock-line loading light, which helps maintain signal integrity on a multi-drop bus running at 110 MHz.