SY89426 データシートの表示（PDF） - Micrel

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SY89426

SONET OC-12/OC-3 CLOCK SYNTHESIZER

Micrel 

Micrel, Inc.

Precision Edge®

SY89426

AC ELECTRICAL CHARACTERISTICS(1)

VCC = VCCO = +5V ± 5%; GND = 0V; TA = –40°C to 85°C

Parameter

VCO Center Frequency

Reference Clock (RFCK)

Frequency Tolerance

Reference Clock (RFCK) Input Duty Cycle

Reference Clock (RETRFCK) Output Duty Cycle

Acquisition Lock Time

TTL Output Rise/Fall Time

PECL Output Rise/Fall Time

CK622 Output Duty Cycle

CK155 Output Duty Cycle

tRST – RST pulse width

tp622 Static Phase Offset of CK622

tp155 Static Phase Offset of CK155

tpREF Static Phase Offset of RETRFCK

NOTE:

1. Airflow greater than 500lfpm is maintained.

Min. Typ. Max.

622.08 ±1%

— ±20

—

— ±20

—

— ±10

—

45

—

55

40

—

60

—

—

15

—

—

2

—

—

500

45

—

55

45

—

55

1

—

—

190 400

600

–250 –400 –750

— +3.5

—

Units

MHz

ppm

ppm

ppm

% of UI

% of UI

µsec

ns

ps

% of UI

% of UI

µsec

ps

ps

ns

Condition

Nominal

77.76MHz

51.84MHz

38.88MHz

15pF load

10% to 90% of amplitude, 15pF load

10% to 90%, 50Ω load, 5pF cap

DTICMIENLGEWCATVREICFOARLMCHARACTERISTICS — TTL

RFCK

Input

CK622

Output

RETRFCK

Output

CK155

Output

tp 622

tp REF

tp 155(1)

NOTE:

1.

Does not apply to 52MHz reference

M9999-112105

hbwhelp@micrel.com or (408) 955-1690

5

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