VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC7124
Package Pin Descriptions
Figure 3: Pin Diagram
VDDP2
VDDP3
O2+
VSS
O3+
O2-
I2+
O3-
I3+
I2-
I3-
Quad Port Bypass Circuit
43
VSS
VDD
I1-
I1+
VDDP1
O1-
O1+
VSS
I0-
I0+
VSS
11
13
9
7
5
3
1
41
39
37
35
33
VSS
VDD
31
O4+
O4-
29
VDDP4
I4+
VSC7124
27
I4-
VDDP0
25
O0-
O0+
23
15
17
19
21
N/C
SEL1
SEL2
SEL0
SEL3
SEL4
VSS
N/C
VDD
N/C
Table 1: Pin Identifications
Pin #
4, 3, 41, 40
35, 34, 28, 27
10, 9
15, 16,
17, 18
14
7, 6, 44, 43
38, 37, 31, 30
24, 25
2, 21, 32
5
42
36
29
26
12, 13, 20, 22, 23
1, 8, 11, 19, 33, 39
Name
I1+, I1-, I2+, I2-
I3+, I3-, I4+, I4-
I0+, I 0-
SEL1, SEL2
SEL3, SEL4
SEL0
O1+, O1-, O2+, O2-
O3+, O3-, O4+, O4-
O0+, O0-
VDD
VDDP1
VDDP2
VDDP3
VDDP4
VDDP0
N/C
VSS
N/C
N/C
Description
INPUT - Differential, Internally Biased to V
DD
/2
Ix+/Ix- is the serial input to PBCx.
INPUT - TTL
Port Bypass Mux SELect lines. A HIGH selects Ix. A LOW selects the
output of the previous internal device.
OUTPUT - Differential
Ox+/Ox- is the serial output from PBCx.
Digital Logic Power Supply.
Power Supply (3.3V) for O1+/-.
Power Supply (3.3V) for O2+/-.
Power Supply (3.3V) for O3+/-.
Power Supply (3.3V) for O4+/-.
Power Supply (3.3V) for O0+/-.
Not Connected
Ground
If unused, connect to VSS.
If unused, connect to VSS.
If unused, connect to VSS.
If unused, connect to VSS.
If unused, connect to VSS
G52293-0, Rev 2.3
05/07/01
©
VITESSE
SEMICONDUCTOR CORPORATION
• 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com
Internet: www.vitesse.com
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