ICS348-22

QUAD PLL CLOCK SYNTHESIZER

EPROM CLOCK SYNTHESIZER

IDT™ / ICS™ QUAD PLL CLOCK SYNTHESIZER

7

ICS348-22

REV B 012005

AC Electrical Characteristics

Unless stated otherwise, VDD = 3.3 V ±5%, Ambient Temperature 0 to +70

° C

Note 1: Measured with 15 pF load.

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

FIN

Fundamental Crystal

25

MHz

Output Frequency

VDD=3.3 V

0.25

189

MHz

Output Rise Time

tOR

20% to 80%, Note 1

1

ns

Output Fall Time

tOF

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

310

ms

PDTS goes high until

stable CLK output, Note 3

0.2

2

ms

One Sigma Clock Period Jitter

Configuration Dependent

50

ps

Maximum Absolute Jitter

tja

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

θJA

Still air

135

° C/W

θJA

1 m/s air flow

93

° C/W

θJA

3 m/s air flow

78

° C/W

Thermal Resistance Junction to Case

θJC

60

° C/W