Description

The LX256V-35F484C is a model from the ispGDX2™ family, which is Lattice's second generation in-system programmable generic digital crosspoint switch for high-speed bus switching and interface applications. This family of switches combines a flexible switching architecture with advanced sysIO interfaces including high-performance sysHSI Blocks and sysCLOCK PLLs to meet the needs of today's high-speed systems. The LX256V-35F484C is available in two options: the standard device with sysHSI capability for ultra-fast serial communications, and the lower-cost "E-series" without the sysHSI block. The ispGDX2 family facilitates a variety of common switching functions through a multiplexer-intensive architecture.

Specifications and features

The LX256V-35F484C offers the following specifications and features:

• High-performance bus switching with high bandwidth up to 12.8 Gbps (SERDES) and up to 38 Gbps (without SERDES)
• Up to 16 (15x10) FIFOs for data buffering
• High-speed performance with fMAX = 360MHz, tPD = 3.0ns, tCO = 2.9ns, and tS = 2.0ns
• Built-in programmable control logic capability
• I/O intensive with 64 to 256 I/Os
• Expanded MUX capability up to 188:1 MUX
• sysCLOCK™ PLL for frequency synthesis, skew management, clock multiply and divide capability, and clock shifting
• sysIO™ Interfacing with support for various standard board interfaces
• Two options available: high-performance sysHSI version and low-cost version without sysHSI
• sysHSI Blocks provide up to 16 high-speed channels with SERDES, Clock Data Recovery (CDR), and support for various encoding techniques
• Flexible programming and testing with IEEE 1532 compliant In-System Programmability (ISP™) and boundary scan test through IEEE 1149.1 interface
• Supports various power supplies: 3.3V, 2.5V, or 1.8V
• 5V tolerant I/O for LVCMOS 3.3 and LVTTL interfaces

Application Scenarios

The LX256V-35F484C can be used in various high-speed bus switching and interface applications, such as:

• Network routers and switches
• Data storage systems
• Telecommunications equipment
• Industrial automation systems
• Test and measurement equipment

Comparison

Advantages:

• High-performance bus switching with high bandwidth
• Flexible switching architecture
• Advanced sysIO interfaces
• Multiple sysHSI Blocks for high-speed channels
• Flexible programming and testing capabilities

Disadvantages:

• The "E-series" version lacks the sysHSI capability for ultra-fast serial communications
• The LX256V-35F484C is not suitable for low-speed applications