This document introduces IDT54/74FCT373T/2373T and IDT54/74FCT573T/2573T, which are high-performance CMOS octal transparent latches with low input and output leakage, CMOS power levels, true TTL input and output compatibility, etc.
The IDT54/74FCT series are fast CMOS octal transparent latches offered in commercial and military grades. They feature low input and output leakage, true TTL compatibility, and high‑drive outputs suitable for bus‑oriented applications.
The document provides pin configurations, functional tables, absolute maximum ratings, DC electrical characteristics, output drive specifications, power‑supply data, switching timings, test circuits, and ordering codes for the various device variants (373T, 533T, 573T, 2573T and their AT/CT/DT versions).
| Input HIGH voltage (VIH) | 2.0 V (typ) |
|---|---|
| Input LOW voltage (VIL) | 0.8 V (typ) |
| Output HIGH voltage (VOH) – Commercial | 2.4 V (typ) |
| Quiescent Power Supply Current (Icc) | 0.01 mA (typ) |
| High‑drive Output HIGH current (IOH) | -12 mA (commercial) / -15 mA (high‑drive) |
| Operating Temperature Range – Commercial | 0 °C to +70 °C |
| Operating Temperature Range – Military | -55 °C to +125 °C |
A logic HIGH is guaranteed at 2.0 V or higher, and a logic LOW is guaranteed at 0.8 V or lower.
The quiescent current is about 0.01 mA under typical conditions.