AC ELECTRICAL CHARACTERISTICS
VCC = 5V, VEE = 0V, TA = 0°C to 70°C, Data Rate = 1.485Gb/s
TEST
LEVEL
PARAMETER
CONDITIONS
SYMBOL
MIN
TYP
MAX
UNITS
Jitter
100m (8281), PRN and pathological
Belden 8281
-
80
100
150
130
2.8
1
135
ps p-p
m
1
1
3
1
2
2
2
1
Equalization
-
-
Belden 1694
-
-
m
Output Rise/Fall Time
Input Resistance
20% - 80%
-
270
ps
Single Ended
-
.
kΩ
Input Capacitance
Single Ended
-
-
-
-
pF
Output Resistance
Single Ended
50
Ω
Output Signal Swing SDO, SDO
Into 50Ω Loads; See Figure 21.
160
200
240
mVp-p
TEST LEVELS: 1. 100% tested at 25°C. 2. Guaranteed by design. 3. Correlated Value. 4. Using EB1504
PIN CONNECTIONS
CLI
CD/MUTE
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
V
CC
CC
V
V
EE
EE
GS1504
TOP
VIEW
SDI
SDO
SDO
SDI
V
V
EE
EE
MCLADJ
NC
NC
NC
PIN DESCRIPTIONS
NUMBER
SYMBOL
TYPE
DESCRIPTION
1
CLI
O
Cable Length Indication. Provides a voltage output representing the amount of cable being
equalized. See figures 19 and 20. The CLI voltage is an approximation of the cable length
being equalized. It is intended as a guide for troubleshooting the initial design and not as an
accurate indication of cable length.
2, 15
3, 6, 11, 14
4, 5
VCC
VEE
I
I
I
I
Most positive supply voltage.
Most negative supply voltage.
SDI, SDI
MCLADJ
Differential Input Pins. AC coupled termination is recommended.
7
Adjusts the maximum amount of cable to be equalized (from 0m to the maximum cable
length). The output is muted (latched to the last state) when the maximum cable length is
reached. To achieve maximum cable length, this pin should be left open. See figures 10 - 12.
8, 9, 10
12, 13
16
NC
-
No Connect. Do not connect these pins to supply or ground.
Differential Serial Data Output Pins, with 50Ω output resistance.
SDO, SDO
CD/Mute
O
I/O
Carrier Detect/Mute Indicator/Control. When the CD/Mute output is low, the carrier is present
and the data output is active. When the CD/Mute output is high, the carrier is not present and
the data output is muted (latched to the last state). This indicates that the maximum cable
length as set by MCLADJ has been reached.
The above default CD/Mute function can be overwritten as follows: if the CD/Mute pin is tied
to ground the data output will not mute and the MCLADJ setting is overwritten. If the mute pin
is tied high, the data output will always mute and the MCLADJ setting is overwritten.
3 of 13
522 - 05 - 05
GENNUM [ GENNUM CORPORATION ]
