DESCRIPTION
The active low enable input can be used for gating or as a data input for demultiplexing applications. While the enable input is held high, all four outputs are high independently of the other inputs. All inputs are equipped with protection circuits against static discharge and transient excess volt-age.This integrated circuit has input and output characteristics that are fully compatible with 54/74 LSTTL logic families. M54/74HCT devices are designed to directly interface HSC2MOS systems with TTL and NMOS components. They are also plug in replacements for ORDER CODES : M54HCT139F1R M74HCT139M1R M74HCT139B1R M74HCT139C1R PIN CONNECTIONS (top view) INPUT AND OUTPUT EQUIVALENT CIRCUIT NC = No Internal Connection February 1993 1/9 M54/M74HCT139 TRUTH TABLE INPUTS ENABLE SELECT G B A H X X L L L L L H L H L L H H OUTPUTS Y0 H L H H H Y1 H H L H H Y2 H H H L H Y3 H H H H L SELECTED OUTPUT NONE Y0 Y1 Y2 Y3 IEC LOGIC SYMBOLS PIN DESCRIPTION
PIN No 1, 15 2, 3 4, 5, 6, 7 12, 11, 10,...
STMicroelectronics
