Triple PLL Field Programmable SS VersaClock Synthesizer

MDS 345 D

6

Revision 090704

Integrated Circuit Systems, Inc.

ICS345

AC Electrical Characteristics

Unless stated otherwise, VDD = 3.3V ±5%, Ambient Temperature -40 to +85

° C

Note 1: Measured with 15pF load

Note 2: Duty Cycle is configuration dependent. Most configurations are min 45% / max 55%

Note 3: ICS test mode output occurs for first 170 clock cycles on CLK7 for each PLL powered up. PDTS

transition high on select address change.

Thermal Characteristics

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Units

Input Frequency

Fundamental crystal

5

27

MHz

Input clock

2

50

MHz

Output Frequency

VDD=3.3 V

0.25

200

MHz

Output Rise Time

20% to 80%, Note 1

1

ns

Output Fall Time

80% to 20%, Note 1

1

ns

Duty Cycle

Note 2

40

49-51

60

%

Power-up time

PLL lock-time from

power-up, Note 3

410

ms

PDTS goes high until

stable CLK output,

Spread Spectrum Off,

Note 3

0.2

2

ms

PDTS goes high until

stable CLK output,

Spread Spectrum On,

Note 3

47

ms

One Sigma Clock Period Jitter

Configuration

Dependent

50

ps

Maximum Absolute Jitter

Deviation from Mean.

Configuration

Dependent

+200

ps

Pin-to-Pin Skew

Low Skew Outputs

-250

250

ps

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Units

Thermal Resistance Junction to

Ambient

θ

JA

Still air

135

°C/W

θ

JA

1 m/s air flow

93

°C/W

θ

JA

3 m/s air flow

78

°C/W

Thermal Resistance Junction to Case

θ

JC

60

°C/W