The Xilinx XC95144XL-7TQG100C is the high‑speed variant of the XC9500XL family, offering the same 144 macrocells and 3,200 usable gates as its -10 counterpart but with a 7.5 ns pin‑to‑pin delay and a system frequency of up to 178 MHz. Built on 0.35 µm CMOS technology and operating at 3.3 V, this device is designed for applications where propagation delay is the critical constraint.

Speed Grade -7
The -7 speed grade indicates a maximum pin‑to‑pin propagation delay of 7.5 ns, which is 25% faster than the -10 grade (10 ns). This translates to a maximum system frequency of 178 MHz, significantly higher than the 100 MHz of the -10 variant. The higher speed is achieved through tighter process control and more aggressive timing optimisation, making the -7 grade suitable for high‑performance applications such as high‑speed bus interfaces, real‑time control, and timing‑critical glue logic.

Architecture
Like all XC9500XL devices, the XC95144XL-7TQG100C is based on FastFLASH technology, providing in‑system programmability with a minimum of 10,000 program/erase cycles. The device comprises eight 54V18 function blocks, each containing 18 macrocells. The 81 I/O pins are distributed across the 100‑pin TQFP package. The interconnect matrix ensures predictable timing and high logic utilisation.

Key Features
The device supports fast concurrent programming, allowing multiple devices in a JTAG chain to be programmed simultaneously. Slew rate control on individual outputs helps manage switching noise in high‑speed designs. The clocking architecture includes three global clocks and one product‑term clock, with local clock inversion available on each macrocell. These features simplify timing closure in complex designs.

Power Considerations
Power dissipation varies with system frequency, design complexity, and output loading. Each macrocell can be individually configured for low‑power mode to reduce static power consumption. Unused product terms and macrocells are automatically deactivated by the development software. In high‑speed applications operating near the 178 MHz limit, dynamic power consumption will be higher than in slower designs; proper power supply decoupling is essential.

Packaging and Environmental
The device is housed in a 100‑pin TQFP (Thin Quad Flat Pack) package measuring 14 × 14 mm with a 0.5 mm pitch. RoHS compliant and SVHC‑free. MSL 3, requiring a floor life of 168 hours after opening. Supplied in tray packaging with 90 pieces per tray. Country of origin is Taiwan.

Product Status
Important: The XC95144XL-7TQG100C is marked as obsolete by the manufacturer. Stock is limited and the device is no longer in active production. For new designs, consider newer CPLD families such as Xilinx CoolRunner‑II or AMD/Xilinx Artix‑7 FPGAs, depending on your performance and density requirements. For existing designs, verify supply availability before committing to volume production.

Development Support
Supported by Xilinx ISE WebPACK and ISE Design Suite (final release: ISE 14.7). Programmable via JTAG using standard cables. The device is not supported by the newer Vivado toolchain, which is designed for 7‑series and later devices. Users requiring modern tool support should consider migrating to more recent programmable logic families.

Typical Applications
The XC95144XL-7TQG100C is suitable for high‑speed glue logic and address decoding, real‑time state machine implementation, high‑performance bus interfaces (PCI, local bus), timing‑critical control functions, and applications where the 100 MHz limit of the -10 grade is insufficient. However, due to its obsolete status, its use is recommended only for sustaining existing products, not for new designs.