CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.

Copyright

1

Semiconductor

tle (HS-1840RH)

bject (Rad-Hard 16 Channel CMOS Analog

tiplexer with High-Z Analog Input Protection)

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September 1997

HS-1840RH

Rad-Hard 16 Channel CMOS Analog

Multiplexer with High-Z Analog Input Protection

File Number

3992.1

Spec Number

518022

Features

• Radiation Environment

- Gamma Rate

- Gamma Dose (

• Low Power Consumption

• Fast Access Time 1000ns

• High Analog Input Impedance 500M

Ω

During Power Loss (Open)

• Dielectrically Isolated Device Islands

• Excellent In Hi-Rel Redundant Systems

• Break-Before-Make Switching

• No Latch-Up

Description

The HS-1840RH is a radiation hardened, monolithic 16

channel multiplexer constructed with the Harris Linear

Dielectric Isolation CMOS process. It is designed to provide

a high input impedance to the analog source if device power

fails (open) or the analog signal voltage inadvertently

exceeds the supply rails during powered operation. Excellent

for use in redundant applications, since the secondary

device can be operated in a standby unpowered mode

affording no additional power drain. More significantly, a very

high impedance exists between the active and inactive

devices preventing any interaction. One of sixteen channel

selection is controlled by a 4-bit binary address plus an

Enable-Inhibit input which conveniently controls the ON/OFF

operation of several multiplexers in a system. All digital

inputs have electrostatic discharge protection.

The HS-1840RH has been specifically designed to meet

exposure to radiation environments. It is available in a 28

lead Ceramic Sidebraze dual-in-line package and 28 lead

Pinouts

Ordering Information

PART

NUMBER

TEMP.

PACKAGE

PKG.

NO.

HS1-1840RH-Q

-55 to 125

28 Ld CERDIP

HS1-1840RH-8

-55 to 125

28 Ld CERDIP

HS1-1840RH/Proto

-55 to 125

28 Ld CERDIP

HS1-1840RH/Sample

25

28 Ld CERDIP

HS9-1840RH-Q

-55 to 125

28 Ld FP

HS9-1840RH-8

-55 to 125

28 Ld FP

HS9-1840RH/Proto

-55 to 125

28 Ld FP

HS9-1840RH/Sample

25

28 Ld FP

(

γ)

HS1-1840RH 28 LEAD SIDEBRAZE CERDIP

CASE OUTLINE GDIP1-T28, COMPLIANT TO MIL-STD-

1835 PACKAGE

TOP VIEW

HS9-1840RH 28 LEAD CERAMIC SIDEBRAZE CASE FLATPACK

OUTLINE CDFP3-F28, COMPLIANT TO MIL-STD-1835 PACKAGE

TOP VIEW

+VS

NC

NC

IN 16

IN 15

IN 14

IN 13

IN 12

IN 11

IN 10

IN 9

GND

(+5VS) VREF

ADDR A3

OUT

IN 8

IN 7

IN 6

IN 5

IN 3

IN 1

ENABLE

ADDR A0

ADDR A1

ADDR A2

-VS

IN 4

IN 2

28

27

26

25

24

23

22

21

20

19

18

17

16

15

1

2

3

4

5

6

7

8

9

10

11

12

13

14

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

+VS

NC

NC

IN 16

IN 15

IN 14

IN 13

IN 12

IN 11

IN 10

IN 9

GND

(+5VS) VREF

ADDR A3

OUT

-VS

IN 8

IN 7

IN 6

IN 5

IN 4

IN 3

IN 2

IN 1

ENABLE

ADDR A0

ADDR A1

ADDR A2

NOT

RECOMMENDED

FOR

NEW

DESIGNS

See

HS-1840ARH