MC12439FN 查看數據表（PDF） - Motorola => Freescale

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MC12439FN

High Frequency Clock Generator

Motorola => Freescale 

MC12439

AC CHARACTERISTICS (TA = 0 to 70°C; VCC = 3.3 to 5.0V ±5%)

Symbol

Characteristic

Min

Max

Unit

Condition

FMAXI

Maximum Input Frequency

S_CLOCK

Xtal Oscillator

10

FREF_EXT

10

10

20

Note 5.

MHz

FMAXO

Maximum Output Frequency

VCO (Internal)

400

FOUT

50

900

MHz

800

tLOCK

Maximum PLL Lock Time

1

10

ms

tjitter

Cycle–to–Cycle Jitter (Peak–to–Peak) (Note 6.)

±25

ps N = 2,4,8; Note 7.

±65

N = 1; Note 7.

ts

Setup Time

S_DATA to S_CLOCK

20

ns

S_CLOCK to S_LOAD

20

M, N to P_LOAD

20

th

Hold Time

S_DATA to S_CLOCK

20

ns

M, N to P_LOAD

20

tpwMIN

Minimum Pulse Width

S_LOAD

50

P_LOAD

50

ns Note 7.

tr, tf

Output Rise/Fall Time

300

800

ps Note 7.

5. Maximum frequency on FREF_EXT is a function of the internal M counter limitations. The phase detector can handle up to 100MHz on the input,

but the M counter must remain in the valid range of 25 ≤ M ≤ 50. See the programming section in this data sheet for more details.

6. See Applications Information section for additional information.

7. 50Ω to VCC – 2.0V pulldown.

MOTOROLA

6

TIMING SOLUTIONS

BR1333 — Rev 6

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