vsc8169 Vitesse Semiconductor Corp, vsc8169 Datasheet - Page 3

• Manufacturer Part Number: vsc8169
• Description: Oc-48 Fec 16 1 Sonet/sdh Mux With Clock Generator
• Manufacturer: Vitesse Semiconductor Corp

G52230-0, Rev 3.6
01/02/01
Preliminary Data Sheet
VSC8169
RESET
PLL locked to reference clock.
Holding RESET “low” for a minimum of 5 CLK16 cycles, then setting “high” enables FIFO operation.
Holding RESET constantly “low” bypasses the FIFO for transparent mode operation.
VSC8169
VSC8169
Figure 4: Traditional DC Termination of CLK16O+/-, REFCLKO+/-
Figure 3: Split-End DC Termination of CLK16O+/-, REFCLKO+/-
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Minimum 5 CLK16 cycles
Tel: (800) VITESSE • FAX: [phone] • Email: [e-mail]
VITESSE
SEMICONDUCTOR CORPORATION
Figure 2: Enabling FIFO Operation
Split-end equivalent termination is Z
R1 = 125
Internet: www.vitesse.com
V
CC
R1||R2 = Z
R2 + V
R1+R2
R2 = 83 , Zo=50 , V
EE
O
R1
= V
Z
TERM
Z
Z
Z
o
O
Transparent Mode Operation
o
O
FIFO Mode Operation
TERM
O
V
to V
CC
= V
TERM
-2V
V
CC
OC-48 (FEC) 16:1 SONET/SDH
V
EE
-2V
CC
50
MUX with Clock Generator
R1
R2
50
R1
R2
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