VITESSE

SEMICONDUCTOR CORPORATION

Preliminary Data Sheet

VSC8132

2.488Gb/s 1:32 SONET/SDH Demux

Page 4

G52250-0, Rev 3.1

12/7/00

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Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com

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Decoupling of the power supplies is a critical element in maintaining the proper operation of the part. It is

also be placed in parallel with the 0.1

µF and 0.01µF capacitors mentioned above. Recommended capacitors are

low-inductance ceramic SMT X7R devices. For the 0.1

µF capacitor, a 0603 package should be used. The

0.01

µF and 0.001µF capacitors can be either 0603 or 0402 packages.

For low frequency decoupling, 47

µF tantalum, low-inductance SMT caps should be sprinkled over the

board’s main +3.3V power supply and placed close to the C-L-C pi filter.

AC Characteristics

Figure 2: Output Timing

Figure 3: Data Output Timing

78MHz CLK

78MHz DATA

SYNC PULSE

PARITY

D31

D0

MSB

LSB

Time

DI+

Differential Serial Data Input

CLKI+

Differential Clock Input

NOTE: Bit 31 (MSB) is received first, Bit 0 (LSB) is received last.