AMD XC4028XLA-09BGG352C

Overview

XC4028XLA-09BGG352C from Xilinx is a high-capacity, 3.3 V low-voltage Field-Programmable Gate Array (FPGA) with 2,432 configurable logic blocks (CLBs), 28,000 typical gate capacity, 32,768 RAM bits, and 256 user I/Os in a 352-pin BGA package. It supports synchronous system clock rates up to 80 MHz, features edge-triggered and dual-port SelectRAM™ memory, and delivers PCI-compliant operation at speed grade -09.

For engineers reviewing the XC4028XLA-09BGG352C datasheet, pinout, applications, or equivalent options, this page provides verified architecture details, CLB-level timing behavior, IOB configuration options, SelectRAM™ mode mapping, and direct alternatives for legacy FPGA migration paths.

Technical Context

The XC4028XLA-09BGG352C belongs to the XC4000XLA family - a 3.3 V, 0.35 µm SRAM-based FPGA series distinct from XC4000E/XL. It implements a hierarchical interconnect architecture with eight global low-skew clock networks, dedicated carry logic, and VersaRing™ I/O interconnect supporting 5 V-tolerant inputs. Its CLBs contain three function generators (F, G, H), dual storage elements configurable as flip-flops or latches (XC4000XLA variant), and programmable input thresholds (1.6 V).

Configuration occurs via master parallel, slave serial, or peripheral modes using external PROMs; bitstream loading enables unlimited reprogramming. The device supports IEEE 1149.1 boundary scan, individual output slew-rate control, and programmable pull-up/pull-down resistors on all IOBs - with soft start-up to mitigate ground bounce during power-on initialization.

Key Specifications

Pinout & Package

XC4028XLA-09BGG352C is housed in a 352-ball plastic ball grid array (BGA) package with 256 user I/Os, 8 global clock inputs, dedicated configuration pins (PROGRAM, INIT, DONE), JTAG boundary-scan interface (TCK/TMS/TDI/TDO), and power/ground distribution optimized for signal integrity in high-speed digital systems.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FPGA applications.

Compared with XC4028XLA-09BGG352C, XC4028XL-09BG352C offers lower cost but sacrifices latch support and routing flexibility, while XCV300E-09BG352C enables next-generation performance at the expense of complete hardware and toolchain requalification.

Availability

XC4028XLA-09BGG352C is available at Aetrix Electronics and suitable for legacy system sustainment, industrial controller upgrades, telecom infrastructure spares, and FPGA-based prototyping requiring stable component supply across extended product lifecycles.

Supply support for XC4028XLA-09BGG352C includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Xilinx, now part of AMD, pioneered commercial FPGA technology and developed the XC4000 series as its first high-density, system-oriented programmable logic platform.

The XC4000XLA family was designed specifically for 3.3 V systems requiring PCI compliance, embedded memory, and long-term obsolescence resilience - targeting telecom, industrial control, and military/aerospace applications.

FAQ

What is the maximum operating frequency of XC4028XLA-09BGG352C?

The XC4028XLA-09BGG352C is rated for a maximum system clock frequency of 80 MHz at speed grade -09, validated under worst-case voltage (3.0 V) and temperature (85°C) conditions. Internal logic paths can exceed 150 MHz in optimized designs. This rating applies to synchronous operation with proper timing constraints applied during place-and-route using Xilinx Foundation or Alliance software tools. The XC4028XLA-09BGG352C achieves this performance through its 0.35 µm SRAM process and enhanced carry logic architecture.

Does XC4028XLA-09BGG352C support dual-port RAM functionality?

Yes, XC4028XLA-09BGG352C supports dual-port RAM in each CLB by configuring both F' and G' function generators as a 16×1 dual-port array with independent read and write ports. This enables simultaneous read and write operations to the same or different addresses - essential for FIFOs and buffer management. The feature is implemented in hardware and requires no external components. Dual-port mode is selected during synthesis using Xilinx library primitives such as RAM16X1D, and is fully supported in XC4000XLA devices per the May 1999 datasheet revision.

Is XC4028XLA-09BGG352C pin-compatible with other XC4028 variants?

XC4028XLA-09BGG352C is pinout-compatible with XC4028EX and XC4028XL devices in the same BGG352 package, sharing identical I/O assignments and power/ground ball maps. However, it is not bitstream-compatible due to architectural differences in CLB structure and routing resources. Migration from XC4028EX/XL requires re-synthesis and place-and-route but preserves PCB layout. The XC4028XLA-09BGG352C maintains the same 256-user-I/O count and global clock pin locations as its predecessors.

What configuration modes does XC4028XLA-09BGG352C support?

XC4028XLA-09BGG352C supports Master Serial, Slave Serial, Master Parallel, and Peripheral configuration modes. In Master Parallel mode, it accepts up to 22-bit addressing for large PROMs - an enhancement over XC4000E's 18-bit limit. Configuration data is loaded into internal SRAM cells, enabling unlimited reprogramming. The device asserts DONE upon successful load and supports IEEE 1149.1 boundary scan for in-system verification. All modes use the same PROGRAM_B, INIT_B, and CCLK pins defined in the BGG352 pinout.

Can XC4028XLA-09BGG352C operate with 5 V I/O signals?

Yes, XC4028XLA-09BGG352C features 5 V-tolerant I/Os on all user pins, allowing direct connection to 5 V logic without level shifters. Input thresholds are fixed at 1.6 V, compatible with both 3.3 V CMOS and TTL signaling standards. Outputs swing from 0 V to VCCO (3.3 V), and the device includes programmable pull-up/pull-down resistors on each IOB. This tolerance is inherent to the XC4000XLA silicon process and does not require external circuitry or configuration bits to enable.