Dual 1-of-4 decoder for address expansion and demultiplexing
The SN74HC139DT is a dual 1-of-4 decoder/demultiplexer from the 74HC family, containing two independent 2-line to 4-line decoder circuits in a single 16-SOIC package.
Supply range, temperature grade, and output drive
Each output sources or sinks 5.2 mA, sufficient to drive a standard TTL load or an LED indicator through a series resistor.
16-SOIC footprint and surface-mount assembly
Housed in a 16-SOIC package with 0.154-inch body width and 3.90 mm body width, the SN74HC139DT uses the standard SOIC-16 land pattern common to many logic and mixed-signal ICs. The surface-mount package suits automated pick-and-place assembly and reflow soldering, with the tape-and-reel option enabling volume production without reel changeovers.