AMD XC3S500E-4FGG320C

Overview

XC3S500E-4FGG320C from AMD (formerly Xilinx) is a Spartan-3E FPGA with 500,000 system gates, 11,200 logic cells, and 320-pin Fine-Pitch Ball Grid Array (FBGA) packaging. It operates at -4 speed grade (tPD = 4.5 ns), supports 3.3V/2.5V/1.2V I/Os, and targets cost-sensitive embedded control and interface bridging applications.

For engineers reviewing the XC3S500E-4FGG320C datasheet, pinout, applications, or equivalent options, key selection factors include logic density, I/O voltage flexibility, embedded block RAM capacity, and supported configuration modes (JTAG, Master Serial, Slave SelectMAP).

Technical Context

The XC3S500E-4FGG320C implements a hierarchical FPGA architecture with configurable logic blocks (CLBs), distributed RAM, and eighteen 18×18 multipliers. It integrates twelve DCI (Digitally Controlled Impedance) termination circuits and supports SelectIO standards including LVCMOS, LVTTL, PCI, and SSTL.

Configuration is performed via external PROM or processor through Master Serial or Slave SelectMAP mode. The device includes internal oscillator for startup and supports boundary-scan testing per IEEE 1149.1 using dedicated JTAG pins.

Key Specifications

Pinout & Package

XC3S500E-4FGG320C uses a 320-ball fine-pitch FBGA package (19×19 mm, 1.0 mm pitch) with 232 user I/Os, 8 dedicated configuration pins, 4 JTAG boundary-scan pins, and power/ground balls distributed across the array.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FPGA-based logic implementation applications.

Compared with XC3S500E-4FGG320C, XC3S400A-4FGG400C trades logic and I/O capability for lower cost and smaller footprint, while XC3S700A-4FGG484C extends scalability with identical feature set but higher pin count and density-both require PCB redesign due to different packages.

Availability

XC3S500E-4FGG320C is available at Aetrix Electronics and suitable for industrial automation, medical imaging front-ends, and automotive diagnostic interface designs requiring stable component supply and long-term obsolescence management.

Supply support for XC3S500E-4FGG320C 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

AMD acquired Xilinx in 2022 and continues development and support of the Spartan FPGA family for cost-optimized programmable logic solutions.

The Spartan-3E family was designed specifically for high-volume, price-sensitive applications requiring reliable logic implementation with integrated I/O flexibility and low-power operation.

FAQ

What is the maximum operating frequency of the XC3S500E-4FGG320C?

The XC3S500E-4FGG320C has a -4 speed grade, specifying a maximum combinational path delay (tPD) of 4.5 ns. This translates to a theoretical maximum clock frequency of approximately 222 MHz for fully pipelined logic paths. Actual achievable frequency depends on design placement, routing, and resource utilization. The XC3S500E-4FGG320C does not guarantee 222 MHz across all configurations but supports this range under optimal conditions.

Does the XC3S500E-4FGG320C support JTAG boundary-scan testing?

Yes, the XC3S500E-4FGG320C includes dedicated TMS, TCK, TDI, and TDO pins compliant with IEEE 1149.1 for boundary-scan testing. These pins enable in-circuit verification, fault isolation, and in-system programming without requiring additional test fixtures. The XC3S500E-4FGG320C uses the same JTAG instruction set as other Spartan-3 devices for consistent toolchain integration.

Can the XC3S500E-4FGG320C be configured using an external microcontroller?

Yes, the XC3S500E-4FGG320C supports Slave SelectMAP configuration mode, allowing an external microcontroller to drive the DOUT, CCLK, and WRITE pins to load configuration data from flash or RAM. This method enables dynamic reconfiguration and field-upgradable logic. The XC3S500E-4FGG320C requires proper timing alignment and PROG_B assertion before initiating transfer.

How much embedded memory does the XC3S500E-4FGG320C provide?

The XC3S500E-4FGG320C contains 360 kbits of total block RAM, organized as thirty-six 18-kbit blocks. Each block can be configured as dual-port RAM, single-port RAM, or shift register. This memory supports FIFOs, frame buffers, and lookup tables without external components. The XC3S500E-4FGG320C does not include distributed RAM beyond CLB flip-flops.

Is the XC3S500E-4FGG320C RoHS compliant?

Yes, the XC3S500E-4FGG320C is manufactured in a RoHS-compliant process and meets EU Directive 2011/65/EU requirements. The 320-ball FBGA package uses lead-free solder spheres and halogen-free molding compound. Documentation confirming compliance is available in the official Xilinx/AMD Product Change Notification (PCN) for this part number.