TXC-06412BIOG Transwitch Corporation, TXC-06412BIOG Datasheet - Page 59

• Manufacturer Part Number: TXC-06412BIOG
• Manufacturer: Transwitch Corporation

Specifications of TXC-06412BIOG

• Lead Free Status / RoHS Status: Not Compliant

PHAST-12P Device
DATA SHEET
- Selected Parameter Values -
TXC-06412B
LVPECL - PCB guidelines:
The differential pairs (P and N) will be routed together, have a controlled impedance of 50
and be the same length. Make them as short as possible and in as straight a path as
possible. Vias should be avoided if practicable.
LVPECL - Unused pins:
All unused LVPECL inputs can be left floating (no resistors required).
All unused LVPECL outputs can be left floating (no resistors required).
LVDS I/O RECOMMENDATIONS:
LVDS - APS Port:
The LVDS I/O on the APS Port (APSRXDATAP/N, APSTXDATAP/N) is compliant to the LVDS
standard: [IEEE Std 1596.3-1996].
The LVDS receiver (APSRXDATAP/N) has an integrated 100
termination resistor between
P and N. It is however recommended to provide a 100
resistor on the board, between
APSRXDATAP and APSRXDATAN, as close as possible to the PHAST-12P. This resistor will
normally be treated as ‘do not install’.
Use DC coupling (no series capacitors).
LVDS - PCB, Connector and Cable guidelines:
The differential pairs (P and N) will be routed together, have a controlled impedance of 50
and be the same length. Make them as short as possible and in as straight a path as
possible. Vias should be avoided if practicable.
Use high quality connectors that are qualified for an LVDS signal at 622.08 Mbit/s (311.04
MHz).
The APS Port always operates at this rate. It cannot operate at a lower rate.
When a cable is used to interconnect two PHAST-12P devices using the APS Port, it is
mandatory to use a 50
cable. In a careful implementation, cable length can be up to 2
meter.
It is required to have a common ground between the two PHAST-12P devices that are
connected using the APS Port.
LVDS - Unused pins:
Unused LVDS inputs can be left floating (no resistors required).
Unused LVDS outputs can be left floating (no resistors required).
5 9 o f 2 2 6
PRELIMINARY TXC-06412B-MB, Ed. 2
June 2005