Module Data Sheet: VCT2000A 155.520MHz

Application: LVPECL Output-Dual Input Clock Generator

Page 2 of 5

Rev. “7” 6/02/03

ALIGNER

8 KHz

REF A

SEL AB

ENABLE / TRISTATE

REF B

PHASE

FORCE FREE RUN

LOW PASS

DET

PHASE

f / N

FILTER

ANALOG

LOW

Q

VCXO

JITTER

OPTIONAL

REFERENCE

OUTPUT

Q

ALARM

FREE RUN STATUS

VCT2000A Block Diagram

2.0

ELECTRICAL CHARACTERISTICS

Specification

Min

Typ

Max

Units

2.1

Regulated Input Supply Voltage, Vcc

3.10

3.30

3.50

V DC

2.2

Supply Current Drain @ 3.5Vdc

110

mA

2.3

Frequency Output

155.520

MHz

2.4

Temperature Ranges

2.4.1

Operating Temp. Range

0

70

ºC

2.4.2

Storage Temp. Range

-40

85

ºC

2.5

Timing Parameters

2.5.1

Output Rise and Fall Time (20% 80%)

-

-

550

ps

2.5.2

Input Jitter Tolerance @ 8kHz Reference

(Input Jitter Frequencies > 10 Hz)

31.25

-

-

µs

2.5.3

Acquisition Time (Offsetting reference by 20ppm)

-

1

-

s

2.5.4

Jitter Filter Bandwidth

-

-

10

Hz

2.5.5

Capture/pull-in range

-25

-

25

ppm

2.5.6

Free Run Frequency

-20

-

20

ppm

2.5.7

Output Duty Cycle

45

50

55

%

2.5.8

Phase Transient due to Reference switching

150

nS

2.5.9

SONET Jitter BW 12 kHz - 20 MHz

1

ps

2.6

Input Logic Levels

2.6.1

‘ 0’

-0.5

0.8

V

2.6.2

‘1’

2.4

5.5

V

2.7

Output Logic Levels (into 50

Ω @Vcc-2.0V)

2.7.1

‘0’

Vcc-1.62

V

2.7.2

‘1’

Vcc-1.02

V