Dual ECL and Dual/Quad PECL, 500ps,

Ultra-High-Speed Comparators

4

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AC ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Tracking Frequency Toggle Rate

4

Gbps

Minimum Pulse Width

250

ps

Propagation Delay

500

700

ps

Propagation Delay Tempco

0.5

ps/

°C

Propagation Delay Skew

Input overdrive = 100mV (Note 4)

10

ps

Propagation Delay Match

Input overdrive = 100mV (Note 5)

40

ps

10mV to 100mV

15

Propagation Delay Dispersion

Overdrive

100mV to 2V

40

ps

Propagation Delay Dispersion

Common-Mode Voltage

10

Propagation Delay Dispersion

Input Slew Rate

0.2V/ns to 10V/ns

40

Propagation Delay Dispersion

Duty Cycle

10% to 90% at 250MHz

30

Propagation Delay Dispersion

Pulse Width

input

overdrive =

100mV

350ps to 1ns

20

ps

Unit-to-Unit Propagation Delay

Match

Input overdrive = 100mV

50

ps

Output Jitter

300

fs

Input Capacitance

IN_+ or IN_, with respect to GND

2

pF

Latch Setup Time

Figure 1, (Notes 3, 6)

250

80

ps

Latch Hold Time

Figure 1, (Notes 3, 6)

300

85

ps

Minimum Pulse Width

Figure 1

250

ps

Latch to Output Delay

Figure 1

200

ps

Rise Time and Fall Time

20% to 80%, Figure 1

200

ps

Note 2: Does not include output state current in Q_, Q_.

Note 3: Guaranteed by design.

to-low output transition vs. the low-to-high output transition.

Note 6: Latch setup and hold-timing specifications are for a differentially driven latch signal.