SY89834U datasheet(4/10 Pages) MICREL

4 / 10 page

PRELIMINARY

Precision Edge™

SY89834U

Micrel

CC = 2.5V ±5% or 3.3V ±10%, TA = –40°C to +85°C

Symbol

Parameter

Condition

Min

Typ

Max

Units

MAX

Maximum Frequency

Input tr /tf ≥ 350ps, Note 2

1.0

GHz

PLH

Propagation Delay (IN1, IN2-to-Q)

Note 4

200

320

500

PHL

Switchover Time (SEL-to-Q)

200

320

500

SKEW

Within-Device Skew

Note 5

520

Part-to-Part Skew

300

JITTER

Cycle-to-Cycle Jitter

Note 6

ps(rms)

Total Jitter

Note 7

ps(pk-pk)

Duty Cycle

Input t

r/tf ≥ 350ps, Note 8

Set-Up Time (EN to IN1, IN2)

Note 9 and Note 10

300

Hold Time (EN to IN1, IN2)

Note 9 and Note 10

500

r, tf

Output Rise/Fall Times

140

225

(20% to 80%)

Note 1.

Measured with a 2.0V input signal, 50% duty cycle, all PECL loading with 50

Ω to V

CC–2V. Output swing is ≥ 400mV.

Note 2.

Specification for packaged product only.

Note 3.

fMAX is defined as the maximum input frequency while enduring a valid output. fMAX is limited by the input stage.

Note 4.

IH = 2.0V, VIL = 0.8V, 50% duty cycle. Delay measured at 100MHz from the crossing of the input signal with VCC/2 as the crossing of the

differential output signal. See Figure 1.

Note 5.

Skew is measured between outputs under identical transitions.

Note 6.

Cycle-to-cycle jitter definition: The variation period between adjacent cycles over a random sample of adjacent cycle pairs.

JITTER_CC = Tn – Tn+1, where T is the time between rising edges of the output signal.

Note 7.

Total jitter definition: with an ideal clock input frequency of

≤ f

MAX (device), no more than one output edge in 10

12 output edges will deviate by

more than the specified peak-to-peak jitter value.

Note 8.

If tr/tf is less than 350ps, the duty cycle distortion will increase beyond the duty cycle limits.

Note 9.

Set-up and hold times apply to synchronous applications that intend to enable/disable before the next clock cycle. For asynchronous applica-

tions set-up and hold times do not apply.

Note 10. See

“Timing Diagrams,” Figure 1a.

AC ELECTRICAL CHARACTERISTICS(Notes 1, 2)

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