CS61884-IB 데이터 시트보기 (PDF) - Cirrus Logic

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CS61884-IB

Octal T1/E1/J1 Line Interface Unit

Cirrus Logic 

CS61884

19.6 Jitter Attenuator Characteristics

(TA = -40°C to 85°C; TV+, RV+ = 3.3 V ±5%; GND = 0 V)

Parameter

Min.

Typ

Max Units

Jitter Attenuator Corner Frequency

Note 11, 19

(Depends on JACF Bit in host mode)

E1 Jitter Attenuation

Note 11, 18

T1/J1 Jitter Attenuation

Note 11, 18

Attenuator Input Jitter Tolerance before FIFO

over flow and under flow Note 11

Delay through Jitter Attenuator Only

Note 11

Intrinsic Jitter in Remote Loopback

T1/J1 Modes -

3.78

-

Hz

T1/J1 Modes -

7.56

-

E1 Modes -

1.25

-

E1 Modes -

2.50

-

3 Hz to 40 Hz + 0.5

-

400 Hz to 100 kHz - 19.5

-

-

dB

-

1 Hz to 20 Hz 0

-

1 kHz - 33.3

-

1.4KHz to 100KHz - 40

-

-

dB

-

-

32-bit FIFO

-

24

-

UI

64-bit FIFO -

56

-

UI

32-bit FIFO -

16

-

UI

64-bit FIFO -

32

-

UI

Notes 11, 17 -

-

0.11

UI

Notes: 18. Attenuation measured with sinusoidal input filter equal to 3/4 of measured jitter tolerance. Circuit

attenuates jitter at 20 dB/decade above the corner frequency. Output jitter can increase significantly

when more than 28 UI’s are input to the attenuator.

19. Measurement is not effected by the position of the Jitter Attenuator.

DS485F1

57

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