vsc834 Vitesse Semiconductor Corp, vsc834 Datasheet - Page 2

• Manufacturer Part Number: vsc834
• Description: 2.5gb/s 17 X 17 Crosspoint Switch With Input Signal Activity Isa Monitoring
• Manufacturer: Vitesse Semiconductor Corp

Page 2
2.5Gb/s 17x17 Crosspoint Switch
with Input Signal Activity (ISA) Monitoring
Functional Description
Data Paths
nominal impedance of 50 . All input termination resistors are tied to V
PECL level output swing. The drive level of the output circuit is designed to produce standard PECL levels
when terminated in 50
age level of the output swing will be shifted from its nominal value. The common-mode voltage of the output
swing can be adjusted using the VCOM pin. The adjustment range is not calibrated, but typically allows for
about +200mV of adjustment in the output common-mode voltage.
pin associated with a given pair of outputs to V
reduced by roughly 200mW.
All input data must be differential and biased to PECL levels. On-chip terminations are provided, with a
Data outputs are provided through differential current switches with on-chip terminations that produce a
Output channels can be powered off in pairs if fewer than 17 outputs are required. By connecting the VEE
A, AN[16:0]
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
to 2.0V. Other termination voltages are possible, such as to V
Tel: (800) VITESSE • FAX: [phone] • Email: [e-mail]
VITESSE
SEMICONDUCTOR CORPORATION
Figure 1: Detailed Block Diagram:
ALE, CSB, WRB, RDB INTB,
DATA[4:0], ADDR[5:0]
MONCLK, CONFIG
Program Memory
Control Interface
Switch Core
17x17
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CC
, the output pairs will pull to V
17
TERM
.
CC
CC
and chip power will be
Y, YN[16:0]
or 1.3V, but the volt-
Datasheet
VSC834
G52247-0, Rev 4.2
02/09/01