Improved, Quad, SPST Analog Switches

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Maxim Integrated Products

1

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_______________General Description

Maxim’s redesigned DG444/DG445 analog switches

now feature on-resistance matching (4

Ω max) between

switches and guaranteed on-resistance flatness over

the signal range (9

Ω max). These low on-resistance

switches conduct equally well in either direction. They

guarantee low charge injection (10pC max), low power

consumption (35µW max), and an ESD tolerance of

2000V minimum per Method 3015.7. The new design

offers lower off leakage current over temperature (less

than 5nA at +85°C).

The DG444/DG445 are quad, single-pole/single-throw

(SPST) analog switches. The DG444 has 4 normally

closed switches and the DG445 has 4 normally open

+10V to +30V supply, or bipolar ±4.5V to ±20V sup-

plies. Maxim’s improved DG444/DG445 continue to be

fabricated with a 44V silicon-gate process.

________________________Applications

Sample-and-Hold Circuits

Communication Systems

Test Equipment

Battery-Operated Systems

Heads-Up Displays

PBX, PABX

Guidance and Control Systems

Audio Signal Routing

Military Radios

Modems/Faxes

______________________New Features

o Plug-In Upgrades for Industry-Standard DG444/DG445

Ω max)

Ω max)

o Improved Charge Injection (10pC max)

o Improved Off Leakage Current Over Temperature

(<5nA at +85°C)

o Withstand Electrostatic Discharge (2000V min)

per Method 3015.7

__________________Existing Features

Ω max)

o Single-Supply Operation +10V to +30V

Bipolar-Supply Operation ±4.5V to ±20V

o Low Power Consumption (35µW max)

o Rail-to-Rail Signal Handling

o TTL/CMOS-Logic Compatible

______________Ordering Information

Ordering Information continued at end of data sheet.

* Contact factory for dice specifications.

PART

TEMP. RANGE

PIN-PACKAGE

DG444CJ

0°C to +70°C

16 Plastic DIP

DG444DY

0°C to +70°C

16 Narrow SO

DG444C/D

0°C to +70°C

Dice*

DG444DJ

-40°C to +85°C

16 Plastic DIP

DG444DY

-40°C to +85°C

16 Narrow SO

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

IN2

D2

S2

V+

V-

S1

D1

IN1

DG445

S3

D3

IN3

IN4

D4

S4

GND

DIP/SO

DIP/SO

DG445

LOGIC

SWITCH

0

1

OFF

ON

SWITCHES SHOWN FOR LOGIC "0" INPUT

DG444

LOGIC

SWITCH

0

1

ON

OFF

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

IN2

D2

S2

V+

V-

S1

D1

IN1

DG444

S3

D3

IN3

IN4

D4

S4

GND

TOP VIEW

_____________________Pin Configurations/Functional Diagrams/Truth Tables

19-4705; Rev 1; 4/94