器件名称: CD54HCT251
功能描述: High-Speed CMOS Logic 8-Input Multiplexer, Three-State
文件大小: 271.59KB 共11页
简 介:CD54HC251, CD74HC251, CD54HCT251, CD74HCT251
Data sheet acquired from Harris Semiconductor SCHS169C
November 1997 - Revised October 2003
High-Speed CMOS Logic 8-Input Multiplexer, Three-State
Description
The ’HC251 and ’HCT251 are 8-channel digital multiplexers with three-state outputs, fabricated with high-speed silicongate CMOS technology. Together with the low power consumption of standard CMOS integrated circuits, they possess the ability to drive 10 LSTTL loads. The three-state feature makes them ideally suited for interfacing with bus lines in a bus-oriented system. This multiplexer features both true (Y) and complement (Y) outputs as well as an output enable (OE) input. The OE must be at a low logic level to enable this device. When the OE input is high, both outputs are in the high-impedance state. When enabled, address information on the data select inputs determines which data input is routed to the Y and Y outputs. The ’HCT251 logic family is speed, function, and pin-compatible with the standard ’LS251.
Features
Selects One of Eight Binary Data Inputs
[ /Title (CD74 HC251 , CD74 HCT25 1) /Subject (High Speed CMOS Logic 8-Input Multiplexer; Three-
Three-State Output Capability True and Complement Outputs Typical (Data to Output) Propagation Delay of 14ns at VCC = 5V, CL = 15pF, TA = 25oC Fanout (Over Temperature Range) - Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads - Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads Wide Operati……
