CS61577(2009) 데이터 시트보기 (PDF) - Cirrus Logic

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CS61577
(Rev.:2009)

T1/E1 Line Interface

Cirrus Logic 

CS61577

APPENDIX A. RECOMMENDED CRYSTAL SPECIFICATIONS

Cirrus Logic telecommunication devicesthat offer jitter attenuation require crystals with specifications for

frequency pullability. The crystal oscillation freque ncy is dictated by capaci tive loading, which is con-

trolled by the chip. Therefore, the crystals must meet the following specifications.

6.176 MHz Crystal Performance Specifications

Parameter

Total Frequency Range

(Note 1)

Operating Frequency

Cload = 11.6 pF

Cload = 19.0 pF

Cload = 37.0 pF

(Note 2)

(Note 3)

(Note 2)

Min

-

6.176803

6.175846

-

Typ

370

-

6.176000

-

Max

390

-

6.176154

6.175197

Units

ppm

MHz

MHz

MHz

8.192 MHz Crystal Performance Specifications

Parameter

Total Frequency Range

Operating Frequency

Cload = 11.6 pF

Cload = 19.0 pF

Cload = 37.0 pF

(Note 1)

(Note 2)

(Note 3)

(Note 2)

Min

-

8.192410

8.191795

-

Typ

210

-

8.192000

-

Notes:

1. With Cload varying from 11.6 to 37.0 pF at a given temperature.

2. Measured at -40 to 85°C.

3. Measured with Saunders 150D meter at 25 °C.

Max

245

-

8.192205

8.191590

Units

ppm

MHz

MHz

MHz

28

DS155F2

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