XC7K325T Datasheet, Pinout, Equivalents, and Specs

The XC7K325T is a Field-Programmable Gate Array (FPGA) from the Xilinx (now AMD) Kintex-7 family, manufactured on a 28nm process technology. It is positioned as a mid-range device, offering a balanced combination of high-density logic, digital signal processing (DSP) capability, and high-speed serial connectivity. The device is engineered to deliver high performance per watt, making it suitable for a wide range of applications that require significant data processing and bandwidth without the power consumption of higher-end FPGAs.

What is the XC7K325T?

The XC7K325T is a programmable logic device that provides hardware engineers with a flexible platform for implementing custom digital circuits. Its internal architecture is composed of a fabric of Configurable Logic Blocks (CLBs), DSP slices, Block RAM (BRAM), and high-speed GTX serial transceivers. This combination allows for the parallel execution of complex algorithms, making it highly effective for applications in wireless communications, medical imaging, aerospace, and industrial control. The engineering benefit of the XC7K325T lies in its ability to provide a cost-effective solution for systems requiring DSP performance and I/O bandwidth that exceed the capabilities of lower-cost FPGAs, while remaining more power-efficient than top-tier devices like the Virtex-7 family.

Pinout Configuration and Packaging

The XC7K325T is primarily available in Fine-Pitch Ball Grid Array (FBGA) packages, such as the FFG676, FFG900, and FBG676. These high-pin-count packages are necessary to accommodate the large number of user I/O, power, ground, and high-speed serial transceiver pins. Thermal management is a critical consideration due to the power density of the device; PCB designs must incorporate thermal vias and potentially a heatsink to ensure operation within specified temperature limits. Key pin groups include dedicated banks for user I/O (SelectIO), multi-gigabit transceiver (GTX) differential pairs, clock inputs, and configuration pins (JTAG, SelectMAP).

Core Architectural Features

• Programmable Logic Fabric: The core of the device contains 326,080 logic cells, organized into Configurable Logic Blocks (CLBs). Each CLB includes 6-input look-up tables (LUTs) and flip-flops, providing a highly flexible structure for implementing custom logic functions.
• DSP Slices (DSP48E1): The XC7K325T integrates 840 dedicated DSP slices. Each slice features a 25x18 multiplier, an accumulator, and a pre-adder, enabling high-throughput, fixed-point arithmetic operations essential for signal processing applications like FIR filters, FFTs, and correlators.
• Block RAM (BRAM): The device includes 16,740 Kbits (approximately 16.7 Mb) of on-chip dual-port Block RAM. This memory is arranged in 36 Kb blocks and is used for data buffering, implementing FIFOs, and storing coefficients or state information, reducing the need for external memory components.
• GTX Serial Transceivers: It features up to 16 GTX transceivers, each capable of data rates up to 12.5 Gb/s. These transceivers are critical for implementing high-speed serial protocols such as PCI Express (Gen1/Gen2), 10 Gigabit Ethernet, Serial RapidIO, and CPRI.
• Clock Management Technology (CMT): The device contains multiple Mixed-Mode Clock Managers (MMCMs) and Phase-Locked Loops (PLLs). These blocks provide advanced clock synthesis, deskewing, and jitter filtering capabilities, ensuring precise and stable clocking for high-performance designs.

Specifications Parameter Table

XC7K325T Equivalents, Cross Reference, and Lifecycle

The XC7K325T is an active component in mass production. Finding a direct, pin-to-pin compatible, drop-in replacement from a competing manufacturer is not feasible due to proprietary architectures, pinouts, and software toolchains. For buyers facing allocation or long lead times, replacement strategies focus on pin-compatible migration within the same family. For example, a design using an XC7K325T in an FFG900 package could potentially migrate to a higher-density XC7K410T in the same FFG900 package, provided the PCB was designed with this migration path in mind. This requires recompiling the design but avoids a hardware respin. An alternative from a competitor like Intel (Altera) would be a device from the Arria V GX or Arria 10 GX family, which offers similar logic density and transceiver capabilities. However, this constitutes a full redesign, requiring new HDL code, a different EDA tool (Quartus), and a completely new PCB layout.

Typical Application & Circuit Considerations

The XC7K325T is commonly implemented in systems requiring high-speed data acquisition, processing, and transmission. Typical applications include 4G/5G remote radio heads, medical ultrasound and MRI systems, broadcast video equipment, and aerospace/defense signal intelligence platforms. From a circuit design perspective, a robust Power Distribution Network (PDN) is critical. The device requires multiple supply voltages for the core (VCCINT), auxiliary logic (VCCAUX), I/O banks (VCCO), and transceivers (MGTAVCC, MGTAVTT). Each power rail demands extensive decoupling capacitance placed as close as possible to the BGA balls to minimize voltage droop and noise. PCB routing for the high-speed GTX transceiver differential pairs requires controlled impedance (typically 100 ohms) and length matching to maintain signal integrity and prevent bit errors.

Video Demonstration

Market Availability and Pricing Trends

High-performance FPGAs like the XC7K325T are subject to dynamic supply chain conditions, with lead times often extending due to complex 28nm fabrication processes and high demand from various sectors. Component allocation and fluctuating prices are common in the market for these devices. To check real-time stock, pricing, or to request a quote for the XC7K325T and its verified alternatives, upload your BOM to WWDParts for fast processing.

Alan Carter

Senior Hardware Engineer & Component Specialist

Alan has over 15 years of expertise in embedded systems design, FPGA architecture, and global semiconductor supply chains. He specializes in component cross-referencing, lifecycle management, and helping OEMs navigate supply shortages.