vsc8124 Vitesse Semiconductor Corp, vsc8124 Datasheet - Page 17

• Manufacturer Part Number: vsc8124
• Description: 2.488 Gb/s Quad Data Re-timer
• Manufacturer: Vitesse Semiconductor Corp

VSC8124
2/23/00
Target Specification
G52271-0, Rev. 1.14
Typical Application
does not use the fast locking, channel re-timer bypassing, or loss of signal alarm masking. Users of those fea-
tures should take care to understand the functions before connecting to the control pins.
Table 12: Recommended Pin Usage
This table lists the suggested connections for non-data path pins for a typical 2.5 Gb/s application which
Pin Number
29
30
42
43
44
45
46
47
53
54
55
56
57
60
62
64
66
68
70
71
72
73
78
79
80
81
82
83
84
96
97
99
2
741 Calle Plano, Camarillo, CA 93012 • 805/388-3700 • FAX: [phone]
FASTLOCK
LOSALMN
Pin Name
REFCK0+
REFCK1+
REFCK0-
REFCK1-
LOSCLR
RTBYP0
RTBYP1
RTBYP2
RTBYP3
REFSEL
TRITTL
CKBYP
TEST30
TEST47
TEST53
TEST54
TEST55
TEST56
TEST57
MASK0
MASK1
MASK2
MASK3
LOS0N
LOS1N
LOS2N
LOS3N
REV
VTT
VTT
3VS
VITESSE
SEMICONDUCTOR CORPORATION
VITESSE SEMICONDUCTOR CORPORATION
Do not connect
Do not connect
Do not connect
Internally generated power supply; Do not connect
Re-timer bypass; Do not connect
Re-timer bypass; Do not connect
Re-timer bypass; Do not connect
Re-timer bypass; Do not connect
Do not connect
Do not connect
Do not connect
Do not connect
Do not connect
Do not connect
Reference clock select; to use REFCK0, do not connect
Reference clock 0-; Connect your reference clock true here
Reference clock 0+; Connect your reference clock complement here
Reference clock 1-; 1k Ohm to Vee
Reference clock 1+; Do not connect
Mask alarm; Do not connect
Mask alarm; Do not connect
Mask alarm; Do not connect
Mask alarm; Do not connect
Tri-state TTL outputs; Do not connect
Loss of signal alarm; if used, 1k Ohm to Vcc otherwise do not connect
Loss of signal channel 0; connect to CMOS input
Loss of signal channel 0; connect to CMOS input
Loss of signal channel 0; connect to CMOS input
Loss of signal channel 0; connect to CMOS input
Internally generated power supply; Do not connect
Loss of signal clear; CMOS input (3.3V max.)
Enable fast lock; Do not connect
Power supply sense; Vcc or do not connect
Recommended Hook-up
2.488 Gb/s Quad
Data Re-timer
Page 17