Texas Instruments CD54HC139
The ’HC139 and ’HCT139 devices contain two independent binary to one of four decoders each with a single active low enable input (1E or 2E). For demultiplexer operation the enable input is the data input.| Part No. | CD54HC139 |
|---|---|
| Datasheet | CD54HC139 Download |
| Manufacturer |  Texas Instruments |
| Description | Dual 2- to 4-Line Decoder/Demultiplexer |
| Buy | Stock & Price |
FEATURES
● Multifunction Capability - Binary to 1 of 4 Decoders or 1 to 4 Line Demultiplexer● Active Low Mutually Exclusive Outputs
● Fanout (Over Temperature Range) - Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads - Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
● Wide Operating Temperature Range . . . -55oC to 125oC
● Balanced Propagation Delay and Transition Times
● Significant Power Reduction Compared to LSTTL Logic ICs
● HC Types - 2V to 6V Operation - High Noise Immunity: NIL = 30%, NIH = 30%of VCC at VCC = 5V
● HCT Types - 4.5V to 5.5V Operation - Direct LSTTL Input Logic Compatibility, VIL= 0.8V (Max), VIH = 2V (Min) - CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH
● Memory Decoding, Data Routing, Code Conversion
DESCRIPTION
Data on the select inputs (1A0 and 1A1 or 2A0 and 2A1) cause one of the four normally high outputs to go low. If the enable input is high all four outputs remain high. The enable input also functions as a chip select when these devices are cascaded.
