General Description
The Ultra37000™ family of CMOSCPLDs provides a range of high-density programmable logic solutions with unparalleled system performance. The Ultra37000 family is designed to bring the flexibility, ease of use, and performance of the 22V10 to high-density CPLDs. The architecture is based on a number of logic blocks that are connected by a Programmable Interconnect Matrix (PIM).

FEATUREs
• In-System Reprogrammable™ (ISR™) CMOS CPLDs
    — JTAG interface for reconfigurability
    — Design changes do not cause pinout changes
    — Design changes do not cause timing changes
• High density
    — 32 to 512 macrocells
    — 32 to 264 I/O pins
    — Five dedicated inputs including four clock pins
• Simple timing model
    — No fanout delays
    — No expander delays
    — No dedicated vs. I/O pin delays
    — No additional delay through PIM
    — No penalty for using full 16 product terms
    — No delay for steering or sharing product terms
• 3.3V and 5V versions
• PCI-compatible[1]
• Programmable bus-hold capabilities on all I/Os
• Intelligent product term allocator provides:
    — 0 to 16 product terms to any macrocell
    — Product term steering onan individual basis
    — Product term sharing among local macrocells
• Flexible clocking
    — Four synchronous clocks per device
    — Product term clocking
    — Clock polarity control per logic block
• Consistent package/pinout offering across all densities
    — Simplifies design migration
    — Same pinout for 3.3V and 5.0V devices
• Packages
    — 44 to 400 leads in PLCC, CLCC, PQFP, TQFP, CQFP, BGA, and Fine-Pitch BGA packages
    — Lead(Pb)-free packages available