SY69952ZC 데이터 시트보기 (PDF) - Micrel

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SY69952ZC

OC-3/STS-3 CLOCK RECOVERING TRANSCEIVER

Micrel 

Micrel, Inc.

SY69952

AC ELECTRICAL CHARACTERISTICS

VCC = +5V ±5%; VEE = GND = 0V, TA = 0°C to +85°C

Symbol

fREF

Parameter

Reference Frequency

fB

Bit Time(1)

tODC

Output Duty Cycle(2)

(TCLK±, RCLK±)

Min.

6.41

19.24

19.5

6.50

48

Typ.

6.48

19.44

19.3

6.43

—

Max.

6.55

19.64

19.1

6.36

52

Units

MHz

MHZ

ns

ns

%

tRF

ECL Output Rise/Fall Tiime(2)

0.4

—

1.2

ns

tLOCK

PLL Lock Time(2)

—

—

1

µs

tRPWH

REFCLK Pulse Width High

3.3

—

—

ns

10

—

—

ns

tRPWL

REFCLK Pulse Width Low

3.3

—

—

ns

10

—

—

ns

tDV

Data Valid

3

—

—

ns

tDH

Data Hold

1

—

—

ns

tPD

Propagation Delay(3)

—

—

10

ns

(RIN to ROUT, TSER to TOUT)

NOTES:

1. fB is calculated as 1/(fREF * 8).

2. Tested initially and after any design or process changes that may affect these parameters.

3. The ECL switching threshold is the differential zero crossing (ie, the point where + and – signals cross).

Condition

MODE = 0

MODE = 1

MODE = 0

MODE = 1

5pf load, 50Ω to VCC –2 (20% to 80%)

RIN transition density 25%

MODE = 0

MODE = 1

MODE = 0

MODE = 1

Prior to RCLK+ rising edge

After RCLK+ rising edge

TIMING WAVEFORMS

M9999-062805

7

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

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