The 74VHCT138A is an advanced high-speed CMOS 3 TO 8 LINE DECODER (INVERTING) fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology.
The 74VHCT138A is an advanced high-speed CMOS 3-to-8 line decoder (inverting) fabricated with sub-micron silicon gate and double-layer metal wiring CMOS technology. It is designed to interface 5V to 3V logic levels and features power-down protection on all inputs and outputs, accepting 0 to 7V on inputs regardless of supply voltage.
| Propagation Delay Time (Typical) | 7.6 ns |
|---|---|
| Quiescent Supply Current (Max) | 4 µA |
| Operating Voltage Range | 4.5V to 5.5V |
| High Level Input Voltage (Min) | 2V |
| ESD Immunity | 2KV |
It is a 3-to-8 line decoder (inverting) where 3 binary select inputs determine which of the 8 outputs goes low.
Yes, it is compatible with TTL outputs with a minimum high-level input voltage of 2V.
The device operates with a supply voltage range of 4.5V to 5.5V.