 DESCRIPTION

The U74LVX4051R is a low-Ron 8-channel analog switch, suitable

for use as an analog or digital multiplexer/demultiplexer. In 3V and 5V

systems these can achieve high-speed operation with the low power

dissipation that is a feature of CMOS.

The U74LVX4051R has three digital select inputs (S1 to S3), eight

independent inputs/outputs (Y0 to Y7) and a common input/output (Z).

All eight switches share an enable input (E). A HIGH on E causes all

switches into the high impedance OFF-state, independent of Sn.

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

U74LVX4051R can be used in a variety of applications, including in the

system which has two power supplies, and in battery bachup circuits.

 FEATURES

* Very low ON resistance:

RON=0.8Ω(Typ.)(VCC-VEE=3.0V)

RON=0.6Ω(Typ.)(VCC-VEE=4.5V)

RON=0.5Ω(Typ.)(VCC-VEE=6.0V)

* Wide supply voltage range from 2.5 V to 6 V

* 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