Logic Inputs

The MAX4780/MAX4784 logic inputs can be driven up

to +4.2V regardless of the supply voltage. For example,

with a +1.8V supply, A_ and

EN may be driven low to

GND and high to +4.2V. Driving A_ and

EN rail-to-rail

minimizes power consumption. Drive

EN low to enable

the COM_ outputs. When

EN is high, the COM_ outputs

are high impedance.

Analog Signal Levels

Analog signals that range over the entire supply voltage

(V+ to GND) can be passed with very little change in on-

resistance (see the

Typical Operating Characteristics).

The switches are bidirectional, so the NO_, NC_, and

COM_ pins can be used as either inputs or outputs.

Layout

High-speed switches require proper layout and design

procedures for optimum performance. Reduce stray

inductance and capacitance by keeping traces short

and wide. Ensure that bypass capacitors are as close

to the device as possible. Use large ground planes

where possible.

0.7

Ω

Ω, Low-Voltage, Quad 2:1 Analog

Multiplexers

8

_______________________________________________________________________________________

Test Circuits/Timing Diagrams

V+

GND

V+

A0

COM

NO

NC

MAX4780/

MAX4784

**MAX4784 ONLY.

EN**

50%

0

GND

90%

Figure 1. Turn-On and Turn-Off Times

50%

0

0

90%

V+

GND

V+

A0

NC, NO

COM

MAX4780/

MAX4784

**MAX4784 ONLY.

EN**

Figure 2. Break-Before-Make Interval