This document is the user manual of IDT54/74FCT821A/B/C,IDT54/74FCT823A/B/C,IDT54/74FCT824A/B/C,IDT54/74FCT825A/B/C products
The IDT54/74FCT series are high‑performance CMOS bus interface registers offering 8‑ to 10‑bit widths, clock enable, clear, and multiple output enables. Variants include fast, super‑fast and radiation‑tolerant versions for both commercial and military applications.
The datasheet provides detailed electrical characteristics, absolute maximum ratings, power‑supply and switching parameters, pin configurations, and ordering information for the 821, 823, 824 and 825 families.
| Input HIGH voltage level (VIH) | 2.0 V |
|---|---|
| Input LOW voltage level (VIL) | 0.8 V |
| Input HIGH current | 5 pA |
| Quiescent power‑supply current (typical) | 0.15 mA |
| Maximum output current | 120 mA |
| Commercial temperature range | 0 °C to +70 °C |
The commercial version operates from 0 °C to +70 °C.
The registers can source up to 120 mA of output current.
The guaranteed input high level is 2.0 V.
Yes, the product is available in Radiation Tolerant and Radiation Enhanced versions.