5

FN6230.0

July 17, 2006

Output Resistance

RoutR

18

27

37

Ω

Output Logic High Voltage

4.9

4.95

5.0

V

Output Logic Low Voltage

0.00

0.05

0.1

V

POWER SUPPLIES, STATIC CONDITIONS

Positive Supply DC Current/Comparator

No input data

+8.25

12.5

mA

Negative Supply Current/Comparator

No input data

-12.5

-8.25

mA

Total Power Dissipation/Comparator

Input data at 40MHz

670

mW

†Total Power dissipation per comparator can be approximately calculated from the following:

Because the ISL55142 has two comparators, the power dissipation would be twice of P calculated from the above equation. The ISL55143 would

be four times P.

NOTES:

3. Lab characterization, room temperature, timing parameters matched stimulus/loads, channel-to-channel skew < 500ps, 1ns maximum by design

5. Not 100% Tested

Test Circuits and Waveforms

FIGURE 1. COMPARATOR PROPAGATION DELAY AND TRANSITION TIME MEASUREMENT POINTS

FIGURE 2. THREE-STATE WINDOW COMPARATOR FUNDAMENTALS

Electrical Specifications

otherwise specified. (Continued)

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNITS

400mV

0V

50%

50%

DATA = 1

DATA = 0

+

-

+

-

easier to understand the utilization of a dual threshold

comparator. Essentially this enables the qualification of an

incoming signal into three states. In the case pictured, the

three states are Valid Low <0.4V, No-man’s-land (between

0.4 and 2.4V), Valid High >2.4V. Table 2 shows how the

COMMENT

<0.4V

0

0

Valid 0

>0.4 and <2.4V

0

1

Invalid

>2.4V

1

1

Valid 1

ISL55141, ISL55142, ISL55143