Low-Voltage, 8-Channel/Dual 4-Channel

Multiplexers with Latchable Inputs

10

______________________________________________________________________________________

GND

WR

100pF

-5V

V-

V+

EN

ON

OFF

OFF

+5V

N0_

IN

+2.4V

3V

A0, A1, (A2)

COM

RS

MAX382

MAX384

GND

WR

35pF

-5V

V-

V+

+3V

+1.5V

0V

RS

50%

+5V

EN

RS

1k

+5V

A0, A1,

(A2)

N01–

N08

COM, COMB

LOGIC

INPUT

N01

+2.4V

MAX382

Operation with Supply Voltages

Other than ±5V

Using supply voltages less than ±5V reduces the analog

signal range. The MAX382/MAX384 muxes operate with

±3V to ±8V bipolar supplies or with a +2.7V to +16.5V

single supply. Connect V- to GND when operating with a

single supply. Both devices can also operate with unbal-

anced supplies, such as +10V and -5V. The

Typical

Operating Characteristics graphs show typical on-resis-

tance with ±3V, ±5V, +3V and +5V supplies. (Switching

times increase by a factor of two or more for operation at

+5V or below.)

Overvoltage Protection

Proper power-supply sequencing is recommended for

all CMOS devices. Do not exceed the absolute maxi-

mum ratings, because stresses beyond the listed rat-

ings can cause permanent damage to the devices.

Always sequence V+ on first, then V-, followed by the

logic inputs, NO, or COM. If power-supply sequencing

is not possible, add two small signal diodes (D1, D2) in

series with supply pins for overvoltage protection

(Figure 8). Adding diodes reduces the analog signal

range to one diode drop below V+ and one diode drop

above V-, but does not affect the devices’ low switch

resistance and low leakage characteristics. Device

operation is unchanged, and the difference between V+

and V- should not exceed 17V. These protection diodes

are not recommended when using a single supply.