描述 Description

The?U74LVX4051 is a high speed，low-voltage drive analog multiplexer/demultiplexer using silicon gate CMOS technology. In 3V and 5V systems these can achieve high-speed operation with the low power dissipation that is a feature of CMOS.?? The U74LVX4051 offer analog/digital signal selection as well as mixed signals. The 4051 has an 8-Channel configuration. The switchses for each channel are turned on by the control pin digital signals. Although the control signal logical amplitude (VCC-GND) is small,the device can perform large-amplitude (VCC-VEE) signal switching. For example, if VCC=3V, GND=0V and VEE=-3V, signals between -3V and +3V can be switched from the logical circuit using a signal 3V power supply. All input pins are equipped with a newly developed input protection circuit that avoids?the need for a diode on the plus side (forword side from the input to the VCC). As a result, for example, 5V signals can be permitted on the inputs even when the power supply voltage to the circuits is off. As a result of this input power protection,the U74LVX4051 can be used in a variety of applications, including in the system which has two power supplies, and in battery bachup circuits.

特性 Features

? Low ON resistance: RON=22?(Typ.)(VCC-VEE=3V)
? ??????????????? ?RON=15?(Typ.)(VCC-VEE=6V)
? High Speed: tpd=3ns (Typ.)(VCC=3V)
? Low power Dissipation: ICC=4μA (Max.)(TA=25°C)
? Input level: VIL=0.8V(Max.)(VCC=3V)
? ?????? ????VIH=2.0V(Min.)(VCC=3V)
? Power down protection is provided on all control inputs
? Pin and function compatible with U74HC4051