SY89425 データシートの表示（PDF） - Micrel

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SY89425

DUAL SONET OC-12 CLOCK SYNTHESIZER

Micrel 

Micrel

ClockWorks™

SY89425

AC ELECTRICAL CHARACTERISTICS

VCCA = VCCB = VCCOA =VCCOB = +5V ±5%; GND = 0V; TA = 0°C to 85°C

Parameter

VCO Center Frequency

Reference Clock (RFCK)

Frequency Tolerance

Reference Clock (RFCK) Input Duty Cycle

Min. Typ. Max.

622.08 ±1%

—

±20

—

—

±20

—

—

±10

—

45

—

55

Acquisition Lock Time

—

—

15

TTL Output Rise/Fall Time

PECL Output Rise/Fall Time

CK622 Output Duty Cycle

—

—

2

—

—

500

45

—

55

tRST – RST pulse width

1

—

—

tp622 Static Phase Offset of CK622

— –0.7 —

Units

MHz

ppm

ppm

ppm

% of UI

µsec

ns

ps

% of UI

µsec

ns

Condition

Nominal

77.76MHz

51.84MHz

38.88MHz

10% to 90% of amplitude, 15pF load

10% to 90%, 50Ω load, 5pF cap

TDICMIENLGEWCATVREICFOARLMCSHARACTERISTICS — TTL

RFCK

Input

CK622

Output

tp 622

5

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