7

FN7451.1

September 21, 2005

FIGURE 19. PACKAGE POWER DISSIPATION vs AMBIENT

TEMPERATURE

FIGURE 20. PACKAGE POWER DISSIPATION vs AMBIENT

TEMPERATURE

Pin Descriptions

PIN NUMBER

PIN NAME

EQUIVALENT

CIRCUIT

DESCRIPTION

1

IN0

Circuit 1

Input for channel 0

2, 6, 8

NIC

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

crosstalk.

3

IN1

Circuit 1

Input for channel 1

4

GND

Circuit 4

Ground pin

5

IN2

Circuit 1

Input for channel 2

7

IN3

Circuit 1

Input for channel 3

9

V -

Circuit 4

Negative Power Supply

10

LE1

Circuit 2

Synchronized channel switching: When LE1 is low, the master control latch loads the

next switching address. The Mux Amp is configured for this address when LE2 goes low.

Synchronized operation results when LE2 is the inverse of LE1. Channel selection is

asynchronous (changes with any control signal change) if both LE1 and LE2 are both

low.

11

LE2

Circuit 2

Synchronized channel switching: When LE2 is low, the newly selected channel, stored

in the master latch via LE1 is selected. Synchronized operation results when LE2 is the

inverse of LE1. Channel selection is asynchronous (changes with any control signal

change) if both LE1 and LE2 are both low.

12

OUT

Circuit 3

Output

13

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.

14

S1

Circuit 2

Channel selection pin MSB (binary logic code)

15

S0

Circuit 2

Channel selection pin LSB (binary logic code)

16

V+

Circuit 4

Positive power supply

1.250W

θ

0°C

/W

SO

16

(0.1

50

”)

1.4

1.2

1

0.8

0.6

0.2

0

0

25

50

75

100

150

AMBIENT TEMPERATURE (°C)

125

85

JEDEC JESD51-7 HIGH EFFECTIVE THERMAL

CONDUCTIVITY TEST BOARD

0.4

θ

11

0°C

/W

SO

16

(0.1

50

”)

1

0.9

0.8

0.6

0.4

0.1

0

0

25

50

75

100

150

AMBIENT TEMPERATURE (°C)

125

85

JEDEC JESD51-3 LOW EFFECTIVE THERMAL

CONDUCTIVITY TEST BOARD

0.2

0.7

0.3

0.5

909mW

ISL59444