GS1528 Gennum Corporation, GS1528 Datasheet - Page 6

• Manufacturer Part Number: GS1528
• Description: Multi-rate Dual Slew-rate Cable Driver For HD-SDI, Sd-sdi & DVB-ASI. 3.3V Supply.
• Manufacturer: Gennum Corporation

APPLICATION INFORMATION
APPLICATION INFORMATION
APPLICATION INFORMATION
APPLICATION INFORMATION
PCB LAYOUT
Special attention must be paid to component layout when
designing serial digital interfaces for HDTV. An FR-4 dielectric
can be used, however, controlled impedance transmission
lines are required for PCB traces longer than approximately
1cm. Note the following PCB artwork features used to optimize
performance:
The PCB trace width for HD rate signals is closely matched to
SMT component width to minimize reflections due to changes
in trace impedance.
The PCB groundplane is removed under the GS1528 output
components to minimize parasitic capacitance.
The PCB ground plane is removed under the GS1528 R
and resistor to minimize parasitic capacitance.
Input and output BNC connectors are surface mounted in-line
to eliminate a transmission line stub caused by a BNC
mounting via high speed traces which are curved to minimize
impedance variations due to change of PCB trace width.
TYPICAL APPLICATION CIRCUIT
TYPICAL APPLICATION CIRCUIT
TYPICAL APPLICATION CIRCUIT
TYPICAL APPLICATION CIRCUIT
GENNUM CORPORATION
DIFFERENTIAL
DATA INPUT
10n
4u7
4u7
49.9
49.9
SD/HD
VCC
NOTE: All resistors in Ohms, capacitors in Farads,
and inductors in Henrys, unless otherwise noted.
1
2
3
750
SET
SDI
SDI
VEE
pin
4
GS1528
6
5
SD/HD
10n
SDO
SDO
VCC
8
7
6
*
TYPICAL VALUE VARIES WITH LAYOUT
5.6n
75
75
75
75
5.6n
*
*
VCC
4u7
4u7
10n
BNC
BNC
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