器件名称:
CD54HC257F3A
功能描述:
High-Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs
文件大小:
276.13KB 共12页
简 介:
CD54HC257, CD74HC257, CD54HCT257, CD74HCT257 Data sheet acquired from Harris Semiconductor SCHS171D November 1997 - Revised October 2003 High-Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs all other input conditions. Moving data from two groups of registers to four common output buses is a common use of the 257. The state of the Select input determines the particular register from which the data comes. It can also be used as a function generator. Features Buffered Inputs [ /Title (CD74 HC257 , CD74 HCT25 7) /Subject (High Speed CMOS Logic Quad 2-Input Multiplexer Typical Propagation Delay ( In to Output ) = 12ns at VCC = 5V, CL = 15pF, TA = 25oC 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 = 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 ≤ 1A at VOL, VOH Ordering Information PART NUMBER CD54HC257F3A CD54HCT257F3A CD74HC257E CD74HC257M CD74HC257MT CD74HC257M96 CD74HCT257E CD74HCT257M CD74HCT257MT TEMP. RANGE (oC) -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to 125 -55 to ……
