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

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Semiconductor

DG181 thru DG191

High-Speed Drivers with JFET Switch

Description

The DG181 thru DG191 series of analog gates consist of 2

or 4 N-channel junction-type field-effect transistors (JFET)

designed to function as electronic switches. Level-shifting

drivers enable low-level inputs (0.8V to 2V) to control the

ON-OFF state of each switch. The driver is designed to

provide a turn-off speed which is faster than turn-on speed,

so

that

break-before-make

action

is

achieved

when

switching from one channel to another. In the ON state, each

switch conducts current equally well in both directions. In the

OFF condition, the switches will block voltages up to 20V

peak-to-peak. Switch-OFF input-output isolation 50dB at

10MHz, due to the low output impedance of the FET-gate

driving circuit.

Features

• Constant ON-Resistance for Signals to

±10V (DG182,

DG185, DG188, DG191), to

±7.5V (All Devices)

•

±15V Power Supplies

• <2nA Leakage from Signal Channel in Both ON and

OFF States

• TTL, DTL, RTL Direct Drive Compatibility

• Cross-Talk and Open Switch Isolation >50dB at 10MHz

(75

Ω Load)

April 1999

Functional Diagrams (Typical Channel)

DG186, DG187, DG188 - ONE AND TWO CHANNEL

SPDT AND SPST CIRCUIT CONFIGURATION

DG183, DG184, DG185 - TWO CHANNEL DPST

CIRCUIT CONFIGURATION

V+

GND

IN

V-

S

D

S

D

V+

GND

IN

V-

File Number

3114.4

OBSOLETE

PRODUCT

POSSIBLE

SUBSTITUTE

PRODUCT

DG184,

DG185:

HI-5049,

HI-5045

DG190:

DG403,

HI-5051,

IH5151

DG191:

HI-5043,

HI-0390,

IH5043