器件名称:
CD54-74HC4514
功能描述:
HIGH-SPEED CMOS LOGIC 4-TO-16 LINE DECODER/DEMULTIPLEXER WITH INPUT LATCHES
文件大小:
233.04KB 共14页
简 介:
CD54HC4514, CD74HC4514, CD74HC4515 Data sheet acquired from Harris Semiconductor SCHS280C November 1997 - Revised July 2003 High-Speed CMOS Logic 4- to 16-Line Decoder/Demultiplexer with Input Latches Description The CD54HC4514, CD74HC4514, and CD74HC4515 are high-speed silicon gate devices consisting of a 4-bit strobed latch and a 4- to 16-line decoder. The selected output is enabled by a low on the enable input (E). A high on E inhibits selection of any output. Demultiplexing is accomplished by using the E input as the data input and the select inputs (A0A3) as addresses. This E input also serves as a chip select when these devices are cascaded. When Latch Enable (LE) is high the output follows changes in the inputs (see truth table). When LE is low the output is isolated from changes in the input and remains at the level (high for the 4514, low for the 4515) it had before the latches were enabled. These devices, enhanced versions of the equivalent CMOS types, can drive 10 LSTTL loads. Features [ /Title (CD74 HC451 4, CD74 HC451 5) /Subject (High Speed CMOS Multifunction Capability - Binary to 1-of-16 Decoder - 1-to-16 Line Demultiplexer 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 ……
