8

FN6162.2

October 10, 2007

Pin Descriptions

PIN NUMBER

PIN NAME

EQUIVALENT

CIRCUIT

DESCRIPTION

1, 3, 7

NIC

Not Internally Connected; it is recommended this pin be tied to ground to minimize crosstalk.

2

IN0

Circuit 1

Input for Channel 0

4

IN1

Circuit 1

Input for Channel 1

5

GND

Circuit 4

Ground pin

6

IN2

Circuit 1

Input for Channel 2

8

IN3

Circuit 1

Input for Channel 3

9

S0

Circuit 2

Channel selection pin LSB (binary logic code)

10

S1

Circuit 2

Channel selection pin MSB (binary logic code)

11

V-

Circuit 4

Negative power supply

12

V+

Circuit 4

Positive power supply

13

OUT

Circuit 3

Output

14

IN-

Circuit 1

Inverting input of output amplifier

15

HIZ

Circuit 2

Output disable (active high); there are internal pull-down resistors, so the device will be active with

no connection; “HI” puts the output in high impedance state.

16

ENABLE

Circuit 2

Device enable (active low); there are internal pull-down resistors, so the device will be active with

no connection; "HI" puts device into power-down mode.

IN

V+

V-

LOGIC PIN

V+

V-

GND.

33k

21k

+

-

1.2V

CIRCUIT 1.

CIRCUIT 2.

V+

V-

OUT

CIRCUIT 3.

V-

V+

CAPACITIVELY

COUPLED

ESD CLAMP

GND

CIRCUIT 4.

AC Test Circuits

FIGURE 24A. TEST CIRCUIT FOR MEASURING WITH A 50

Ω OR

75

Ω INPUT TERMINATED EQUIPMENT

FIGURE 24B. BACKLOADED TEST CIRCUIT FOR VIDEO

CABLE APPLICATION. BANDWIDTH AND

DEGRADED.

NOTE: Figure 24A illustrates the optimum output load when connecting to input terminated equipment. Figure 24B illustrates

backloaded test circuit for video cable applications.

ISL59440

TEST

50

Ω

OR

75

Ω

50

Ω

OR

75

Ω

50

Ω

OR

75

Ω

475

Ω

OR

462.5

Ω

EQUIPMENT

ISL59440

50

Ω OR 75Ω

TEST

50

Ω

OR

75

Ω

50

Ω

OR

75

Ω

EQUIPMENT

ISL59440