_______________General Description

The MAX308/MAX309 precision, monolithic, CMOS ana-

log multiplexers (muxes) offer low on-resistance (less

than 100

Ω), which is matched to within 5Ω between

channels and remains flat over the specified analog sig-

nal range (7

Ω max). They also offer low leakage over

temperature (NO-off leakage current less than 5nA at

+85°C) and fast switching speeds (transition time less

than 250ns). The MAX308 is a single-ended 1-of-8

device, and the MAX309 is a differential 2-of-4 device.

The MAX308/MAX309 are fabricated with Maxim’s

improved 44V silicon-gate process. Design improve-

ments yield extremely low charge injection (less than

10pC) and guarantee electrostatic discharge protection

greater than 2000V.

These muxes operate with a single +4.5V to +30V sup-

ply or bipolar ±4.5V to ±20V supplies, while retaining

TTL/CMOS-logic input compatibility and fast switching.

CMOS inputs provide reduced input loading. These

improved parts are plug-in upgrades for the industry-

standard DG408, DG409, DG508A, and DG509A.

________________________Applications

Sample-and-Hold Circuits

Automatic Test Equipment

Heads-Up Displays

Guidance and Control Systems

Military Radios

Communications Systems

Battery-Operated Systems

PBX, PABX

Audio Signal Routing

____________________________Features

o Guaranteed On-Resistance Match Between

Channels, <5

Ω Max

o Low On-Resistance, <100

Ω Max

o Guaranteed Flat On-Resistance over Specified

Signal Range, 7

Ω Max

o Guarateed Low Charge Injection, <10pC

o NO-Off Leakage Current <5nA at +85°C

o COM-Off Leakage Current <20nA at +85°C

o ESD Protection >2000V

o Plug-In Upgrade for Industry-Standard

DG408/DG409/DG508A/DG509A

o Single-Supply Operation (+4.5V to +30V)

Bipolar-Supply Operation (±4.5V to ±20V)

o Low Power Consumption, <300µW

o Rail-to-Rail Signal Handling

o TTL/CMOS-Logic Compatible

______________Ordering Information

Precision, 8-Channel/Dual 4-Channel,

High-Performance, CMOS Analog Multiplexers

________________________________________________________________

Maxim Integrated Products

1

CMOS DECODE LOGIC

A2

A1

A0

EN

NO8

NO7

NO6

NO5

NO4

NO3

NO2

NO1

COM

V+

V-

GND

MAX308 8-CHANNEL SINGLE-ENDED MULTIPLEXER

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

A1

A2

GND

V+

NO1

V-

EN

A0

TOP VIEW

MAX308

NO5

NO6

NO7

NO8

COM

NO4

NO3

NO2

DIP/SO

Continued at end of data sheet.

_____________________Pin Configurations/Functional Diagrams/Truth Tables

Call toll free 1-800-998-8800 for free samples or literature.

19-0271; Rev 0; 7/94

PART

MAX308CPE

MAX308CSE

MAX308C/D

0°C to +70°C

0°C to +70°C

0°C to +70°C

TEMP. RANGE

PIN-PACKAGE

16 Plastic DIP

16 Narrow SO

Dice*

Ordering Information continued at end of data sheet.

* Contact factory for dice specifications.

** Contact factory for availability.

MAX308EPE

-40°C to +85°C

16 Plastic DIP

MAX308ESE

-40°C to +85°C

16 Narrow SO

MAX308EJE

-40°C to +85°C

16 CERDIP

MAX308MJE

-55°C to +125°C

16 CERDIP**