Differential Crosspoint Switch
Description
m o 68 X 69 3.
2 GBPS DIFFERENTIAL CROSSPOINT SWITCH S2090 c .
68 X 69 3.
2 GBPS DIFFERENTIAL CROSSPOINT SWITCH S2090 U 4 t • Digital demultiplexing FEATURES e e • Microwave or fiber-optic data distribution • SiGe BiCMOSh Technology • High-speed automatic test equipment S crosspoint switch • 68 x 69 differential a • Datacom or telecom switching t and multicast switching capability • Broadcast a • Differential 200 mV to 1600 mV input data GENERAL DESCRIPTION .
D 400 mV to 1400 mV • Differential The S2090 is a high-speed 68 x 69 differential w programmable output swing crosspoint switch with both full broadcast and w• Up to 3.
2 Gbps NRZ data rate multicast capability.
Any of its 68 differential w • Power down of individual output drivers LVPECL input signal pairs can be connected to any
DEVICE SPECIFICATION • Parallel read back function • LVTTL configuration controls • Internal 100 Ω line to line terminations on high-speed differential inputs • Reconfigurable without disturbing operation • Single +3.
3 V supply or +2.
5 V supply • 9.
5 W typical power dissipation with 800 mV output swing • Compact 32.
5 mm x 32.
5 mm 624 pin CBGA package • Complies with Bellcore and ITU-T standards or all of its 69 differential CML output signal pairs.
The differential logic data path makes the part ideal for high-speed applications.
The differential nature of the data path is retained throughout the crosspoint structure to minimize data distortion and to handle NRZ data rates up to 3.
2 Gbps.
The high-speed serial inputs to the S2090 are internally biased and have internal 100 Ω line-to-line terminations.
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APPLICATIONS
• Dense Wavelength Division Multiplexing (DWDM) systems • Internet switches • Digital video
Figure 1.
System Block Diagram
Port Card
S3056 S3057
S3056
w
S3057
w
S3052 S3052 S3052
S3057
.
D w
t a
S a
e h
LVTTL configuration controls simplify interfacing to slower speed circuitry.
Once a new configuration has been entered into the configuration register file, the S20...
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