器件名称: CD54HC157
功能描述: High-Speed CMOS Logic Quad 2-Input Multiplexers
文件大小: 462.83KB 共15页
简 介:The CD54HC158 and CD74HC158 are obsolete and no longer are supplied. Data sheet acquired from Harris Semiconductor SCHS153C
CD54/74HC157, CD54/74HCT157, CD54/74HC158, CD54/74HCT158
High-Speed CMOS Logic Quad 2-Input Multiplexers
Description
The ’HC157, ’HCT157, ’HC158, and ’HCT158 are quad 2input multiplexers which select four bits of data from two sources under the control of a common Select input (S). The Enable input (E) is active Low. When (E) is High, all of the outputs in the 158, the inverting type, (1Y-4Y) are forced High and in the 157, the non-inverting type, all of the outputs (1Y-4Y) are forced Low, regardless of all other input conditions. Moving data from two groups of registers to four common output buses is a common use of these devices. The state of the Select input determines the particular register from which the data comes. They can also be used as function generators.
September 1997 - Revised October 2003
Features
Common Select Inputs
[ /Title (CD74H C157, CD74H CT157, CD74H C158, CD74H CT158) /Subject (High Speed
Separate Enable Inputs Buffered inputs and 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 - High Noise Immunity: NIL = 30%, NIH = 3……
