ICS251

FIELD PROGRAMMABLE SS VERSACLOCK SYNTHESIZER

EPROM CLOCK SYNTHESIZER

IDT™ / ICS™ FIELD PROGRAMMABLE SS VERSACLOCK SYNTHESIZER 6

ICS251

REV B 061306

AC Electrical Characteristics

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

° C

Note 1: Measured with 15 pF load.

Note 2: Duty Cycle is configuration dependent. Most configurations are minimum 45% and maximum 55%.

Thermal Characteristics

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Units

Input Frequency

Fundamental Crystal

5

27

MHz

Input Clock

3

150

MHz

Output Frequency

0.314

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

410

ms

PDTS goes high until

stable CLK output,

Spread Spectrum Off

.6

2

ms

PDTS goes high until

stable CLK output,

Spread Spectrum On

47

ms

One Sigma Clock Period Jitter

Configuration Dependent

50

ps

Maximum Absolute Jitter

Deviation from Mean.

Configuration Dependent

+200

ps

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Units

Thermal Resistance Junction to

Ambient

θ

JA

Still air

150

°C/W

θ

JA

1 m/s air flow

140

°C/W

θ

JA

3 m/s air flow

120

°C/W

Thermal Resistance Junction to Case

θ

JC

40

°C/W