3.2Gbps SFP VCSEL Driver with Diagnostic

Monitors

4

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ELECTRICAL CHARACTERISTICS (continued)

+25

°C, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

SAFETY FEATURES (see the Typical Operating Characteristics section)

High-Current Fault Threshold

0.7

0.8

0.9

V

-0.250

-0.2

-0.150

V

Power-Monitor Fault Threshold

0.7

0.8

0.9

V

TX Disable Time

Time from rising edge of TX_DISABLE to

(Note 6)

1.8

5

µs

TX Disable Negate Time

Time from rising edge of TX_DISABLE to

(Note 6)

55

500

µs

Fault Reset Time

after rising edge of TX_DISABLE (Note 6)

60

200

ms

Power-On Time

Time after power-on to transmitter-on with

TX_DISABLE low (Note 6)

60

200

ms

Fault Assert Time

Ω

(Note 6)

1.4

50

µs

Fault Delay Time

15

µs

TX_DISABLE Reset

Time TX_DISABLE must be held high to

reset FAULT (Note 6)

1µs

Ω.

Note 3: Measured by applying a pattern that contains 20µs of K28.5, followed by 5µs of zeros, then 20µs of K28.5, followed by 5µs

of ones. Data rate is equal to 2.5Gbps, with inputs filtered using 1.8GHz Bessel filters.

Note 6: Guaranteed by design and characterization.

Note 7: Measured electrically with a 50

Ω load AC-coupled to OUT+.

Note 8: Deterministic jitter is the peak-to-peak deviation from the ideal time crossings measured with a K28.5 bit pattern at 3.2Gbps

(00111110101100000101).