Flexible-LVDS Support
In addition to the 36 input and 36 output True-LVDS™ channels, APEX II devices feature up to 88 input and 88 output Flexible-LVDS™ channels. The Flexible-LVDS feature supports data transfer rates up to 624 Mbps, resulting in up to 110 Gbps of additional differential bandwidth. The high-performance core of APEX II devices can be used in conjunction with embedded differential I/O buffers to achieve these high data rates.
Differential I/O Support
Additionally, Flexible-LVDS channels support other popular differential I/O standards, including LVPECL and HyperTransport. With up to 12 independent Flexible-LVDS clock domains per device, APEX II devices are capable of remarkable performance and flexibility, enabling cutting-edge networking and communications applications.
Unparalleled LVDS Bandwidth
Flexible-LVDS support, when combined with True-LVDS support, permits up to 182 Gbps of total LVDS bandwidth in a single APEX II device. Table 1 summarizes total LVDS support in APEX II devices.
| Table 1. APEX II Flexible-LVDS Support |
| Device |
True-LVDS Channels
(Input/Output)
1 Gbps per Channel
|
Flexible-LVDS Channels
(Input/Output)
624 Mbps per Channel
|
Total LVDS Bandwidth
Up to
182-Gbps Bandwidth
|
| EP2A15 |
36/36
|
56/56
|
142 Gbps
|
| EP2A25 |
36/36
|
56/56
|
142 Gbps
|
| EP2A40 |
36/36
|
88/88
|
182 Gbps
|
| EP2A70 |
36/36
|
88/88
|
182 Gbps
|
| EP2A90 |
36/36
|
88/88
|
182 Gbps
|
|
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