The IDT54/74FCT139T/AT/CT is a fast CMOS 1-OF-4 decoder with enable. It features low input and output leakage, CMOS power levels, true TTL input and output compatibility, high drive outputs, and meets or exceeds JEDEC standard 18 specifications.
The document details the IDT54/74FCT139T/AT/CT, which is a dual 1-of-4 decoder constructed with an advanced dual metal CMOS process. Each of the two independent decoders accepts binary weighted inputs (Ao-A1) and provides four mutually exclusive active low outputs (O0-O3). The device features an active low enable input that forces all outputs high when asserted, allowing for power-off disable functionality to permit live insertion.
| Leakage Current | <1pA (max.) |
|---|---|
| Output High Voltage (Typ) | 3.3V |
| Output Low Voltage (Typ) | 0.3V |
| High Drive Output Current (IOL) | 48mA |
| Industrial Temperature Range | -40°C to +85°C |
| Military Temperature Range | -55°C to +125°C |
The device is available in SOIC and QSOP for industrial use, and CERDIP or LCC for military applications.
Yes, it meets or exceeds JEDEC standard 18 specifications.