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General Description

The MAX4578/MAX4579 are high-voltage, 8-channel

CMOS multiplexers. The MAX4578 and dual 4-channel

MAX4579 are ideal for precision ADC calibration and

system self-monitoring applications. These calibration

multiplexers (cal-muxes) have precision resistor-

dividers to generate accurate voltage ratios from an

input reference voltage. The reference ratios include

15/4096 and 4081/4096 of the external reference volt-

age, accurate to 15 bits, and 1/2(V+) and 5/8(V+ - V-),

accurate to 8 bits. The external reference voltage as

well as ground can also be switched to the output. The

MAX4578/MAX4579 have enable inputs and address

latching. All digital inputs have 0.8V and 2.4V logic

thresholds, ensuring both TTL- and CMOS-logic com-

patibility when using a single +12V or dual ±15V sup-

plies. Protection diodes at all inputs provide >2kV ESD

rating.

The MAX4578/MAX4579 operate from a single +4.5V to

+36V supply or from dual supplies of ±4.5V to ±20V.

On-resistance (350

Ω max) is matched between switch-

es to 15

The MAX4578/MAX4579 are available in small 20-pin

SSOP, SO, and DIP packages.

Applications

Data-Acquisition Systems

Test Equipment

Avionics

Audio Signal Routing

Networking

Features

o On-Chip Gain and Offset Divider Networks

Provide 15-Bit Accurate Output Ratios

o On-Chip V+ to GND and V+ to V- Divider Networks

Provide 8-Bit Accurate Output Ratios

o 350

o 12

o 10pC (max) Charge Injection

o Guaranteed 20pA Off-Leakage Current

o Rail-to-Rail Signal Handling

o Small 20-Pin SSOP, SO, DIP Packages

High-Voltage, Single 8-to-1/

Dual 4-to-1 Cal-Multiplexers

________________________________________________________________

Maxim Integrated Products

1

CAL

A0

A1

18

17

LATCH

EN

20

19

16

LOGIC

DECODER

GND

V+

V-

REFHI

REFLO

COMA

NO1A

NO2A

NO3A

NO4A

NO4B

COMB

NO3B

NO2B

NO1B

5

1

2

3

4

6

15

14

13

12

11

7

8

9

10

4081R

15R

4081R

15R

MAX4579

19-1396; Rev 0; 10/98

PART

MAX4578CAP

0°C to +70°C

TEMP. RANGE

PIN-PACKAGE

20 SSOP

Ordering Information continued at end of data sheet.

Pin Configurations/

Functional Diagrams

Ordering Information

MAX4578CWP

0°C to +70°C

20 Wide SO

MAX4578CPP

0°C to +70°C

20 Plastic DIP

MAX4578EAP

-40°C to +85°C

20 SSOP

MAX4578EWP

-40°C to +85°C

20 Wide SO

MAX4578EPP

-40°C to +85°C

20 Plastic DIP

Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.

MAX4578 appears at end of data sheet.