IDT54/74FCT374/534/574 are 8-bit registers with buffered common clock and buffered 3-state output control. When the output enable (OE) is LOW, the eight outputs are enabled. When the OE input is HIGH, the outputs are in the high-impedance state.
The IDT54/74FCT series are FAST CMOS octal D registers with three‑state outputs, available in non‑inverting (374/574) and inverting (534) versions. Variants A and C provide up to 30 % and 50 % speed improvements over the original FAST devices, and are offered in commercial, radiation‑tolerant and radiation‑enhanced packages.
The document details pin configurations, electrical ratings, power‑supply characteristics, propagation delays, test circuits, and ordering information for both commercial (0 °C to +70 °C) and military (‑55 °C to +125 °C) temperature ranges.
| Static CMOS Power Consumption | 1 mW (typical) |
|---|---|
| Input HIGH Voltage (VIH) | 2.0 V |
| Input LOW Voltage (VIL) | 0.8 V |
The output enable (OE) input is active LOW and provides three‑state control of the outputs.