GX9533_09 Datasheet, PDF (1/15 Pages) Gennum Corporation – Serial Digital 8x9 Crosspoint

GENLINX™ II GX9533 Serial Digital 8x9 Crosspoint
Features
• operation beyond 622Mb/s
• accepts SMPTE and PECL input levels
• fully differential signal path
• on-chip PECL current loads eliminate need for external
pull-down resistors
• capable of driving 100Ωdifferential loads
• very low 500mW power consumption
• additional expansion port input for construction of
larger matrices
• auxiliary monitoring output
• easy to configure
• double latched address inputs with separate load and
configure
• TTL/CMOS compatible control logic inputs
• single 5V power supply
Applications
• Serial digital video switching
• Datacom or telecom switching
Description
The GX9533 is a high speed 8x9 serial digital crosspoint. An
expansion input port eases the design of larger switching
matrices by reducing PCB layers and eliminating the need
for cascaded secondary switching. Decode logic and
double level latching to configure the matrix are included
on chip. Separate LOAD and CONFIGURE inputs allow for
asynchronous configuration and synchronous switching.
These latches can also be made transparent for
asynchronous switching by pulling the LOAD and
CONFIGURE pins high.
In the power saving (PS) mode, the GX9533 has a very low
power consumption of 500mW. This is accomplished by
driving a 400mV output swing into the on-chip 200Ω
differential load termination in the expansion port of the
next GX9533. This architecture provides a significant
power savings and the elimination of external load
resistors or impedance matching resistors. In applications
where standard PECL levels are necessary, the GX9533 can
be configured in "PECL Mode", to drive 800mVp-p into a
100Ω differential load. The power consumption in this
mode increases to 860mW.
2
AUX IN
16
EXP0..7
16
IN0 .. 7
INPUT
BUFFER
SWITCHING
MATRIX
2
16
OUTPUT
BUFFER
STD/PECL2
STD/PECL1
V_CCO
OUT 0..7
16
AUX
2
CONFIG
LOAD
LOAD A
OA0..2
IA0..3
CONFIG
LATCH
LOAD
LATCH
3
DECODE
4
LOGIC
Figure A: GX9533 Functional Block Diagram
GENLINX™ II GX9533 Serial Digital 8x9 Crosspoint
Data Sheet
8494 - 4
November 2009
www.gennum.com
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