Clock Synthesizer for Portable Systems

MDS 1493-17 A

5

Revision 101005

Integr ated Circuit System s

ICS1493-17

PRELIMINAR Y INFORMA T ION

AC Electrical Characteristics

Unless stated otherwise, VDDO = 2.5 V ±5%, Ambient Temperature -10

°C to +80°C

Note 1: Measured with a 5 pF load.

Note 2: Finish from prior cycle to start of new cycle.

Internal Pull-down Resistor

OE, 48M, 22M,

22/24M, 37M, 27M

75

250

k

Ω

Internal Pull-up Resistor

SCK, SDATA

100

500

k

Ω

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Units

Input Frequency

27

MHz

Output Rise Time

20% to 80%, Note 1

0.7

1.5

2.2

ns

Output Fall Time

80% to 20%, Note 1

0.7

1.5

2.2

ns

Output Impedance

VO=VDDO/2

33

46

68

Ω

Output Clock Duty Cycle

VDDO/2, 27 MHz,

Note 1

40

50

60

%

VDDO/2, Note 1

45

50

55

%

Frequency Synthesis Error

All outputs

0

ppm

Modulation Rate

30

35

40

kHz

Short Term Jitter

Cycle-to-Cycle

150

300

ps

Long Term Jitter

27 MHz, n=1000

600

ps

Long Term Jitter

48 MHz, n=1000

800

ps

Long Term Jitter

22M and 22/24M,

n=1000

1.2

ns

Long Term Jitter

37 MHz non-spread,

n=1000

1.5

6

ns

Power-up Time

From minimum VDD

to outputs stable

1.5

3

ms

Output Enable Time

50

ns

Output Disable Time

20

ns

Switching Time

22/24M, Note 2

100

ns

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Units