ICS841484I Data Sheet

FEMTOCLOCK® CRYSTAL-TO-0.7V DIFFERENTIAL HCSL CLOCK GENERATOR

ICS841484DKI REVISION A NOVEMBER 7, 2012

6

©2012 Integrated Device Technology, Inc.

Table 6B. AC Characteristics, VDD = 3.3V ± 5%, TA = -40°C to 85°C

NOTE: Electrical parameters are guaranteed over the specified ambient operating temperature range, which is established when the device is

mounted in a test socket with maintained transverse airflow greater than 500 lfpm. The device will meet specifications after thermal equilibrium

has been reached under these conditions.

NOTES continued on next page.

Symbol

Parameter

Test Conditions

Minimum

Typical

Maximum

Units

fOUT

Output

Frequency

Q[0:3], nQ[0:3]

100

MHz

125

MHz

200

MHz

400

MHz

REF_OUT

25

MHz

fIN

Input Frequency

REF_IN

REF_SEL = 1, BYPASS = 0

25

MHz

tsk(o)

Output Skew; NOTE 1, 2

70

ps

tjit(cc)

Cycle-to-Cycle Jitter; NOTE 2

fOUT = 100MHz, N = 12,

OE_REFOUT = 1,SSM = 0

60

100

ps

fOUT = 125MHz, N = 8,

OE_REFOUT = 1, SSM = 0

35

92

ps

fOUT = 200MHz, N = 6,

OE_REFOUT = 1, SSM = 0

20

72

ps

fOUT = 400MHz, N = 3,

OE_REFOUT = 1, SSM = 0

15

36

ps

tjit(Ø)

RMS Phase Jitter (Random);

NOTE 3

fOUT = 100MHz (12kHz – 20MHz)

1.21

1.6

ps

fOUT = 125MHz (12kHz – 20MHz)

1.47

1.6

ps

fOUT = 200MHz (12kHz – 20MHz)

1.23

1.6

ps

fOUT = 400MHz (12kHz – 20MHz)

1.32

2

ps

tL

PLL Lock Time

85

ms

VMAX

Absolute Maximum Output Voltage;

NOTE 4, 5

1150

mV

VMIN

Absolute Minimum Output Voltage;

NOTE 4, 6

-300

mV

VRB

Ringback Voltage; NOTE 7, 8

-100

100

mV

tSTABLE

Time before VRB is allowed; NOTE

7, 8

500

ps

FM

SSC Modulation Frequency; NOTE

9

29

32

33.33

kHz

FMF

SSC Modulation Factor;

NOTE 9

-0.5

%

SSCRED

Spectral Reduction; NOTE 9

10

dB

VCROSS

Absolute Crossing Voltage;

NOTE 4, 10, 11

125

560

mV

V

CROSS

Total Variation of VCROSS;

NOTE 4, 10, 12

140

mV

tSLEW +

tSLEW -

Rising/Falling Edge Rate;

NOTE 7, 13

Measured between

-150mV to +150mV

0.6

4.7

V/ns

tR / tF

Output

Rise/Fall Time

REF_OUT

690

1550

ps

odc

Output

Duty Cycle

Q[0:3], nQ[0:3]

N = 8, N = 12

45

55

%

Q[0:3], nQ[0:3]

N

644

56

%

REF_OUT;

NOTE 14

Using REF_IN Input

48

52

%