VITESSE
SEMICONDUCTOR CORPORATION
2.5Gb/s, 20-Bit Transceiver
Advance Product Information
VSC7146
Figure 8: Input Structures
VDD +3.3 V
INPUT
Current
Limit
R
R
GND
TTL Inputs
Figure 9: High-Speed I/O Termination Scheme
Transmitter
Output
50
50
50Ω Transmission Line
Receiver
Input
50
VBB
50
VSC7146
Off-Chip
VSC7146
No external resistor terminations are necessary on the high-speed I/O
Page 12
© VITESSE SEMICONDUCTOR CORPORATION
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: 805/987-5896
G52162-0 Rev. 2.7
8/28/00