CD74HCT251E .

产品概述

The CD74HCT251E is a 8-input high speed CMOS Multiplexer with three-state outputs, fabricated with high-speed silicon-gate 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 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 input 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.

• Selects one of eight binary data inputs
• Three-state output capability
• True and complement outputs
• Balanced propagation delay and transition times
• Significant power reduction compared to LSTTL logic ICs
• Alternate source is Philips
• High noise immunity
• Direct LSTTL input logic compatibility
• CMOS Input compatibility
• 10 LSTTL Load standard outputs

• 15 LSTTL Loads bus driver outputs

应用

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