器件名称:
CD54HC139F3A
功能描述:
High-Speed CMOS Logic Dual 2- to 4-Line Decoder/Demultiplexer
文件大小:
415.07KB 共13页
简 介:
CD54HC139, CD74HC139, CD54HCT139, CD74HCT139 Data sheet acquired from Harris Semiconductor SCHS148D September 1997 - Revised October 2003 High-Speed CMOS Logic Dual 2- to 4-Line Decoder/Demultiplexer Description 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). 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. For demultiplexer operation the enable input is the data input. The enable input also functions as a chip select when these devices are cascaded. This device is functionally the same as the CD4556B and is pin compatible with it. The outputs of these devices can drive 10 low power Schottky TTL equivalent loads. The HCT logic family is functionally as well as pin equivalent to the LS logic family. Features [ /Title (CD74 HC139 , CD74 HCT13 9) /Subject (High Speed CMOS Logic Dual 2-to-4 Line Decod 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 Signicant Power Reduction Compared to LSTTL Logic ICs HC Types - 2V to 6V Operation - Hig……
