PIN CONNECTIONS
OEM_TEST
CLK_EN
SSI/CD
V
CC_75
LOCK
C
OSC
MOD
44
DDI
DDI
V
CC_75
V
CC
V
EE
SDI
SDI
V
CC
V
EE
CD_ADJ
AGC-
1
2
3
4
5
6
7
8
9
10
11
12
43
42
41
40
39
38 37
36
35 34
V
CC
A/D
V
EE
V
EE
GS7025
33
32
31
30
V
EE
SDO
SDO
V
EE
SCO
SCO
V
EE
nc
nc
270
nc
GS7025
TOP VIEW
29
28
27
26
25
24
23
13
14
15
16
17
18 19
20
21 22
AGC+
R
VCO
CBG
PIN DESCRIPTIONS
NUMBER
1, 2
3, 44
4, 8, 13, 22, 35
5, 9, 14, 18, 27, 30,
33, 34, 37
6, 7
10
11, 12
15, 16, 17
19
20
21
23, 25, 26
24
28, 29
SYMBOL
DDI/DDI
V
CC
_75
V
CC
V
EE
SDI/SDI
CD_ADJ
AGC-, AGC+
LF+, LFS, LF-
R
VCO
_RTN
R
VCO
CBG
nc
270
SCO/SCO
TYPE
I
I
I
I
DESCRIPTION
Digital data inputs (Differential ECL/PECL).
Power supply connection for internal 75Ω pullup resistors connected to DDI/DDI.
Most positive power supply connection.
Most negative power supply connection.
I
I
I
I
I
I
I
-
I
O
Differential analog data inputs.
Carrier detect threshold adjust.
External AGC capacitor.
Loop filter component connection.
R
VCO
Return.
Frequency setting resistor.
Internal bandgap voltage filter capacitor.
No connect - Do not connect to power or ground. Leave floating.
270Mb/s Data Rate Select - Always set high.
Serial clock output. SCO/SCO are differential current mode outputs and require
external 75Ω pullup resistors.
Equalized and reclocked serial digital data outputs. SDO/SDO are differential current
mode outputs and require external 75Ω pullup resistors.
31, 32
SDO/SDO
O
5
GENNUM CORPORATION
522 - 80 - 00
R
VCO
_RTN
V
CC
V
CC
V
EE
LF+
LFS
LF-
V
EE
GENNUM [ GENNUM CORPORATION ]
