3

FN7486.0

October 31, 2005

Pin Descriptions

PIN

FUNCTION

DATA+(0:3)

Positive differential digital input that determines the driver output state when it is enabled.

DATA-(0:3)

Negative differential digital input that determines the driver output state when it is enabled.

DRV EN+(0:3) Positive differential digital input that enables or disables the corresponding driver.

DRV EN-(0:3) Negative differential digital input that enables or disables the corresponding driver.

QA (0:3)

Comparator digital outputs. QA(X) is high when VINP(X) exceeds CVA(X).

QB (0:3)

Comparator digital outputs. QB(X) is high when VINP(X) exceeds CVB(X).

DOUT (0:3)

Driver outputs.

VINP (0:3)

Comparator inputs.

VH (0:3)

Unbuffered analog inputs that set each individual driver’s “high” voltage level.

VL (0:3)

Unbuffered analog inputs that set each individual driver’s “low” voltage level. VL must be a lower voltage than VH.

NC

No internal connection.

CVA (0:3)

Analog inputs that set the threshold for the corresponding channel’s A comparators.

CVB (0:3)

Analog inputs that set the threshold for the corresponding channel’s B comparators.

COMP HI

Supply voltage, unbuffered input that sets the high output level of all comparators. Must be greater than COMP LO.

COMP LO

Supply voltage, unbuffered input that sets the low output level of all comparators. Must be less than COMP HI.

Positive power supply (5% tolerance).

Negative power supply (5% tolerance).

not using an external supply.

LOSWING

swing circuitry.

Truth Tables

DRIVERS

INPUTS

OUTPUT

DATA

DRV EN

DOUT

X+ > -

Hi - Z

+ > -

+ < -

VH

+ < -

+ < -

VL

X = DON’T CARE

RECEIVERS

INPUT

OUTPUTS

VINP

QA

QB

<CVA

<CVB

0

0

<CVA

>CVB

0

1

>CVA

<CVB

1

0

>CVA

>CVB

1

1

ISL55100A