5

FN6230.2

March 1, 2011

Input Capacitance (Note 11)

2.5

pF

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

P (Note 12) Input data at 40MHz

670

mW

NOTES:

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

11. Limits should be considered typical and are not production tested.

12. 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 this equation. The ISL55143 would be

four times P.

13. Compliance to datasheet limits is assured by one or more methods: production test, characterization and/or design.

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

(Note 13)

TYP

MAX

(Note 13)

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 Figure 2, the three

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

truth table would be utilized in the real world.

COMMENT

<0.4V

0

0

Valid 0

>0.4 and <2.4V

0

1

Invalid

>2.4V

1

1

Valid 1

ISL55141, ISL55142, ISL55143