VITESSE
SEMICONDUCTOR CORPORATION
Data Sheet
10-Bit Transceiver for Fibre
Channel and Gigabit Ethernet
VSC7123
Figure 8: Input Structures
VDDD
VDDD
3K
4K
INPUT
INPUT
INPUT
3K
4K
GND
TTL Inputs (not REFCLK)
GND
High-Speed Input (RX+/RX-)
VDD
+3.3 V
12.6K
VDDD
VDDP
REFCLK
9.3K
TX+
TX-
12.6K
9.3K
GND
High-Speed Outputs (TX+/-)
GND
REFCLK TTL Input
VDDT
OUTPUT
VSST
TTL Outputs
VSSD
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com
Internet: www.vitesse.com
Page 10
G52212-0, Rev 4.3
03/25/01
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
