251PMLFT 参数 Datasheet PDF下载

ICS251 DATASHEET

AC Electrical Characteristics

Unless stated otherwise,

VDD = 3.3V ±5%,

ambient temperature -40 to +85C

Parameter

Input Frequency

Output Frequency

Output Rise Time

Output Fall Time

Duty Cycle

Symbol

F

IN

Conditions

Fundamental crystal.

Input clock.

20% to 80%, Note 1.

80% to 20%, Note 1.

Note 2.

PLL lock time from

power-up.

PDTS goes high until stable

CLK output, spread

spectrum off.

Min.

5

3

0.314

Typ.

Max. Units

27

150

200

MHz

MHz

MHz

ns

ns

60

10

%

ms

t

OR

t

OF

1

1

40

49–51

4

.6

2

ms

Power-up Time

PDTS goes high until stable

CLK output, spread

spectrum on.

PDTS goes high until

spread spectrum is stable,

spread spectrum on.

4

7

ms

10

50

+200

50

ms

ps

ps

One Sigma Clock Period Jitter

Maximum Absolute Jitter

t

ja

Configuration dependent.

Deviation from Mean.

Configuration dependent.

Note 1: Measured with 15pF load.

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

Thermal Characteristics

Parameter

Thermal Resistance Junction to Ambient

Thermal Resistance Junction to Case

Symbol



JA



JA



JA



JC

Conditions

Still air.

1 m/s air flow.

3 m/s air flow.

Min.

Typ.

150

140

120

40

Max. Units

C/W

C/W

C/W

C/W

FIELD PROGRAMMABLE SS VERSACLOCK® SYNTHESIZER

6

OCTOBER 10, 2017