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GENLINX
™
II
GS9024
Automatic Cable Equalizer
DATA SHEET
FEATURES
• automatic cable equalization
• fully compatible with SMPTE 259M
• typically equalizes greater than 350m of high quality
cable at 270Mb/s
• signal strength indicator
• output data muting when input data is lost
• output 'eye' monitor (OEM) with large signal amplitude
and power down option
• low power: 240mW at 5V
• 14 pin SOIC package
• programmable output data squelch for max cable
length limiting
• carrier detect with programmable threshold level
• serial data output "High Z" select to allow muxing of
EQ inputs
APPLICATIONS
Front-end cable equalization for digital video systems; Input
equalization for serial digital distribution amplifiers, routers,
production switchers and other receiving equipment.
DESCRIPTION
The GS9024 is a high performance automatic cable
equalizer designed for serial digital data rates from 143Mb/s
to 540Mb/s. The GS9024 receives either single-ended or
differential serial data and outputs equalized differential
signals at PECL levels (800mV). The GS9024 provides up to
40dB of gain at 200MHz which will typically result in
equalization of greater than 350m at 270Mb/s of Belden
8281 cable.
The GS9024 incorporates an analog signal strength
indicator/carrier detect (SSI/CD) output indicating both the
presence of a carrier and the amount of equalization
applied to the signal. Optional external resistors allow the
carrier detect threshold level to be customized to the user's
requirement.
The GS9024 also features selectable High Z serial data
outputs eliminating the need for input muxing circuitry in
routers. In addition, the GS9024 provides an 'Output Eye
Monitor' (OEM) which allows the verification of signal
integrity after equalization, prior to reslicing.
The GS9024 operates from a single +5V or -5V power
supply and consumes only 240mW of power. Packaged in a
small 14 pin SOIC, the GS9024 is ideal for router
applications where high density component placement is
required.
ORDERING INFORMATION
PART NUMBER
GS9024-CKB
GS9024-CTB
PACKAGE
14 pin SOIC
14 pin SOIC Tape
TEMPERATURE
0°C to 70°C
0°C to 70°C
GS9024
SDI
+
-
VARIABLE GAIN
EQ STAGE
+
+
-
-
SDO
SDO
HIGH Z
SDI
OEM
EYE
MONITOR
AUTO EQ
CONTROL
SSI/CD
+
AGC
-
CD_ADJ
BLOCK DIAGRAM
Revision Date: November 2000
GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3
Tel. +1 (905) 632-2996 Fax. +1 (905) 632-5946 E-mail: info@gennum.com
www.gennum.com
Document No. 521 - 70 - 06
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Supply Voltage
Input Voltage Range (any input)
Operating Temperature Range
Storage Temperature Range
Lead Temperature (soldering, 10 sec)
VALUE
5.5V
V
CC
+0.5 to V
EE
-0.5V
0°C
≤
T
A
≤
70°C
GS9024
-65°C
≤
T
S
≤
150°C
260°C
DC ELECTRICAL CHARACTERISTICS
V
CC
= 5V, V
EE
= 0V, T
A
= 0°C TO 70°C unless otherwise shown.
PARAMETER
Supply Voltage
Power Consumption
SYMBOL
V
CC
P
D
CONDITIONS
MIN
4.75
-
TYP
5.0
1
MAX
5.25
-
-
-
-
-
-
UNITS
V
mW
mW
mA
mA
mA
V
NOTES
TEST
LEVEL
240
340
44
58
11
2.5
3
3
1
1
3
1
with OEM active
Supply Current
Ι
S
with OEM active
Serial Data O/P Current
SDI/SDI Common Mode
Voltage
AGC+/AGC- Mode
Voltage
OEM Bias Potential
SSI/CD Output Current
Ι
SOURCE
C
LM
AX
= 50pF R
L
=
∞
C
LM
AX
= 50pF R
L
= 5kΩ
Ι
SINK
High Z Input Voltage
V
HIGH
V
LOW
TEST LEVELS
1. 100% tested at 25°C.
2. Guaranteed by design.
3. Inferred or co-related value.
Ι
SDO
R
L
= 75Ω
-
-
-
-
-
-
2.7
-
V
1
-
-
-
-
2.4
-
NOTES
4.5
-
-
1.0
-
-
-
18
110
1.5
-
0.8
V
µA
µA
mA
V
V
1
1
1
1. Typical values are parametric norms at 25°C.
2
GENNUM CORPORATION
521 - 70 - 06
AC ELECTRICAL CHARACTERISTICS
V
CC
= 5V, V
EE
= 0V, T
A
= 0°C TO 70°C unless otherwise shown.
PARAMETER
Data Rate
Output Signal Swing
Additive Jitter
SYMBOL
CONDITIONS
MIN
143
TYP
-
1
MAX
540
1000
-
-
-
UNITS
Mb/s
mV
ps p-p
ps p-p
ns
NOTES
TEST
LEVEL
1
1
V
SDO
R
L
= 75Ω
270Mb/s, 300m
540Mb/s, 100m
700
-
-
0.5
850
275
200
0.65
GS9024
t
J
see
Fig 5
5
5
3
Output Rise and Fall
Times (20-80%)
Output Duty Cycle
Distortion
Input Resistance
Input Capacitance
Carrier Detect
Response Time
t
r
,
t
f
-
30
-
ps
2
R
IN
C
IN
SDI, SDI
SDI, SDI
Carrier Applied R
L
=
C
L
≤
50pF on SSI/CD
-
-
10
1.0
3
-
-
-
kΩ
pF
µs
2
2
2
t
CDON
t
CDOFF
∞
,
∞
,
-
Carrier Removed R
L
=
C
L
≤
50pF on SSI/CD
-
30
-
µs
2
High Z Response Time
Input Return Loss
Maximum Equalizer
Gain
TEST LEVELS
1. 100% tested at 25°C.
2. Guaranteed by design.
t
r
HIGHZ
at 270MHz
A
EQ
at 200MHz
-
15
-
17
20
40
-
-
-
ns
dB
dB
see Fig 8
see Fig 4
2
3
3, 5
NOTES
4. Evaluated using test setup Figure 1.
5. Evaluated using test setup Figure 2.
1. Typical values are parametric norms at
25°C.
3. Inferred or co-related value.
TEST SETUP
DATA
TEKTRONIX
GigaBERT
700
TRANSMITTER
DATA
GS9028
CABLE
DRIVER
BELDEN 8281
CABLE
EB9024
BOARD
TEKTRONIX
GigaBERT
700
ANALYZER
TRIGGER
CLOCK
Fig. 1 Test Setup for Figure 3.
BELDEN 8281
CABLE
GS9028
CABLE
DRIVER
EB9024
BOARD
VERTICAL IN
DATA
ANRITSU
DATA
ME522A
or
GigaBERT
700
TRANSMITTER CLOCK
SSI/CD V
V CD_ADJ OSCILLOSCOPE
TRIGGER IN
Fig. 2 Test Setup for Figures 4, 5, 6, 7, 10 and 11.
3
GENNUM CORPORATION
521 - 70 - 06
PIN CONNECTIONS
AGC-
V
EE
V
CC
SDI
SDI
V
EE
V
CC
1
2
3
4
14
13
12
AGC+
HIGH Z
SSI/CD
SDO
GS9024
11
TOP VIEW
5
10
6
7
9
8
GS9024
SDO
CD_ADJ
OEM
PIN DESCRIPTIONS
NUMBER
1, 14
4, 5
8
SYMBOL
AGC-, AGC+
SDI/SDI
OEM
TYPE
I
I
O
External AGC capacitor.
Differential serial digital data inputs.
Output ‘Eye’ monitor. OEM is a single ended current mode output
and requires an external 50Ω pullup resistor.
Carrier detect threshold adjust.
Equalized serial digital data outputs.
Signal strength indicator/Carrier Detect.
The SDO/SDO outputs are High Z when this pin is HIGH. If High Z
functionality is not used, this input can be left floating or tied LOW.
DESCRIPTION
9
10, 11
12
13
CD_ADJ
SDO/SDO
SSI/CD
HIGH Z
I
O
O
I
4
GENNUM CORPORATION
521 - 70 - 06
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