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AMD XCS20-4PQ208C
- Part No.:
- XCS20-4PQ208C
- Manufacturer:
- AMD
- Category:
- FPGAs (Field Programmable Gate Array)
- Package:
- 208-BFQFP
- Datasheet:
-
XCS20-4PQ208C.pdf
- Description:
- IC FPGA 160 I/O 208QFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,237
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Product details
Overview
XCS20-4PQ208C from AMD (formerly Xilinx) is a Spartan-2 family FPGA with 20,000 system gates, 176 user I/Os, and configured in a 208-pin PQFP package; it supports 3.3V I/O operation, operates at -4 speed grade (12 ns CLB delay), and is used in industrial control logic and legacy communication interface bridging.
For engineers reviewing the XCS20-4PQ208C datasheet, pinout, applications, or equivalent options, key selection considerations include I/O count, speed grade timing closure, PQFP thermal profile, and legacy Spartan-2 toolchain compatibility.
Technical Context
The XCS20-4PQ208C implements configurable logic blocks (CLBs) with four-input LUTs and flip-flops, distributed RAM, and dedicated carry logic for arithmetic functions. It includes global clock buffers and three dedicated clock inputs supporting synchronous design.
Configuration is performed via serial mode using an external PROM or parallel slave mode with a microprocessor; no internal configuration memory is present, requiring external bitstream loading at power-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Capacity | 20,000 system gates - defines maximum combinational logic density for gate-equivalent synthesis. |
| User I/O Pins | 176 - supports high-pin-count peripheral interfacing without external glue logic. |
| Speed Grade | -4 (12 ns CLB propagation delay) - determines maximum achievable clock frequency in registered paths. |
| I/O Voltage | 3.3V - requires compatible 3.3V signaling on all user I/O banks; not 5V-tolerant. |
| Package | 208-pin Plastic Quad Flat Pack (PQFP) - 28 × 28 mm body, 0.5 mm pitch, JEDEC MS-026 compliant. |
| Configuration Mode | Serial or Parallel Slave - mandates external PROM or host processor for bitstream loading at startup. |
Pinout & Package
208-pin PQFP (Plastic Quad Flat Pack), 28 mm × 28 mm body, 0.5 mm lead pitch, JEDEC standard MS-026. Thermal pad not present; requires standard reflow profile for plastic QFP.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GCK0–GCK2 | Global Clock Input | Dedicated low-skew routing to all CLBs; essential for synchronous system timing. |
| PROGRAM | Configuration Initiate | Active-low signal that resets configuration logic and clears internal state prior to reload. |
| DIN | Serial Data Input | Accepts configuration bitstream in master serial mode; tied to PROM output. |
| INIT | Configuration Status | Open-drain output indicating successful CRC check or configuration error condition. |
| VCCINT | Core Supply | 2.5V supply for internal logic; separate from I/O bank voltage rails. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable Logic Blocks (CLBs) | Each contains two 4-input LUTs and two flip-flops - enables efficient implementation of registered logic and small state machines. |
| Distributed RAM | 16-bit deep × 1-bit wide per CLB - usable as shift registers or small lookup tables without block RAM resources. |
| Carry Chain Logic | Fast ripple-carry path across CLBs - improves adder/subtractor performance versus general logic synthesis. |
| Three Global Clock Nets | Low-skew distribution to all logic - reduces clock skew impact on setup/hold timing closure. |
Applications
| Industrial Motion Control | Legacy Telecom Interface |
|---|---|
Use Scenario: Real-time position loop coordination across multiple stepper/servo axes in CNC machinery. IC Role / Device Role / Timing Role: FPGA fabric implements deterministic logic for pulse generation, encoder counting, and safety interlock sequencing. Use Value: 176 I/Os enable direct connection to motor drivers, limit switches, and feedback sensors without multiplexing. | Use Scenario: T1/E1 line framing and HDLC protocol handling in base station backhaul cards. IC Role / Device Role / Timing Role: Configurable logic maps time-slot assignment and CRC-16 calculation onto CLB resources. Use Value: -4 speed grade ensures sub-2 µs latency for frame alignment detection in 2.048 Mbps E1 streams. |
| Automated Test Equipment (ATE) | Medical Imaging Subsystem |
Use Scenario: Pin electronics channel control and pattern memory addressing in semiconductor wafer testers. IC Role / Device Role / Timing Role: Synchronous state machine manages per-pin driver/sensor timing with precise cycle resolution. Use Value: Dedicated carry chain accelerates address counter logic for 128K-depth pattern RAM access. | Use Scenario: Digital signal preprocessing pipeline for ultrasound beamforming data streams. IC Role / Device Role / Timing Role: FPGA implements FIR filter taps and sample-rate conversion before ADC/DAC interface. Use Value: 3.3V I/O compatibility matches legacy analog front-end ASIC voltage domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FPGA logic implementation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| XCS20-5PQ208C | Faster -5 speed grade (10 ns CLB delay); otherwise identical architecture and pinout. | Better suited for higher-frequency control loops or tighter timing budgets. | Select XCS20-5PQ208C only if timing analysis confirms margin improvement justifies cost premium. |
| XCS30-4PQ208C | Higher 30,000-gate capacity; same -4 speed grade and PQFP package. | Enables larger logic partitions or additional peripheral interfaces in same footprint. | Choose XCS30-4PQ208C when design scalability or future feature expansion is required. |
Compared with XCS20-4PQ208C, the XCS20-5PQ208C offers improved timing margin without layout change, while the XCS30-4PQ208C provides gate-count headroom-both retain full toolchain and pinout compatibility within the Spartan-2 PQFP family.
Availability
XCS20-4PQ208C is available at Aetrix Electronics and suitable for industrial motion control, legacy telecom infrastructure, and automated test equipment requiring stable component supply over extended production lifecycles.
Supply support for XCS20-4PQ208C 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; XCS20-4PQ208C was originally developed by Xilinx as part of its early-generation Spartan FPGA portfolio.
The Spartan-2 family targets cost-sensitive, high-volume applications requiring moderate logic density and mature 0.18 µm CMOS process reliability.
FAQ
What is the configuration method supported by XCS20-4PQ208C?
XCS20-4PQ208C supports serial and parallel slave configuration modes. Serial mode uses DIN and GCK0 with an external PROM; parallel slave mode connects data bus lines D0–D7 and control signals like PROGRAM and INIT to a host processor. The XCS20-4PQ208C does not contain on-chip configuration memory and requires external bitstream loading at every power-on.
Does XCS20-4PQ208C support 5V-tolerant I/Os?
No, XCS20-4PQ208C I/Os operate exclusively at 3.3V and are not 5V-tolerant. Connecting to 5V signals without level translation risks damage or unreliable operation. The XCS20-4PQ208C datasheet specifies VCCO = 3.3V ± 0.3V for all I/O banks; external voltage translators are required for mixed-voltage systems.
What is the core voltage requirement for XCS20-4PQ208C?
XCS20-4PQ208C requires a regulated 2.5V supply on VCCINT pins for internal logic operation. This is independent of the 3.3V I/O supply (VCCO). The XCS20-4PQ208C specification mandates ±3% tolerance on VCCINT; failure to meet this causes timing violations or configuration failure.
Is XCS20-4PQ208C pin-compatible with other Spartan-2 PQFP devices?
Yes, XCS20-4PQ208C shares the same 208-pin PQFP footprint and pin assignments with other Spartan-2 devices in the PQ208 package, including XCS30-4PQ208C and XCS20-5PQ208C. The XCS20-4PQ208C maintains identical power, ground, clock, and I/O pin locations across this package variant, enabling drop-in replacement where logic capacity and speed grade allow.
What software tools are required to develop for XCS20-4PQ208C?
XCS20-4PQ208C is supported exclusively by Xilinx ISE Foundation and WebPACK versions up to 14.7. Later Vivado tools do not support Spartan-2 architecture. The XCS20-4PQ208C bitstream must be generated using ISE's MAP, PAR, and BitGen flow; third-party synthesis tools require strict adherence to ISE netlist constraints.
XCS20-4PQ208C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- AMD
- Series:
- Spartan®
- Package/Case:
- 208-BFQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Number of LABs/CLBs:
- 400
- Number of Logic Elements/Cells:
- 950
- Total RAM Bits:
- 12800
- Number of I/O:
- 160
- Number of Gates:
- 20000
- Voltage - Supply:
- 4.75V ~ 5.25V
- Mounting Type:
- Surface Mount
- Operating Temperature:
- 0°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 208-PQFP (28x28)
XCS20-4PQ208C FAQ
1.How can I place an order for XCS20-4PQ208C through Aetrix?
Please submit a Request for Quotation (RFQ) for XCS20-4PQ208C on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for XCS20-4PQ208C reliable?
The price and inventory of XCS20-4PQ208C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for XCS20-4PQ208C is usually 5 days.
3.What payment methods are accepted for XCS20-4PQ208C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for XCS20-4PQ208C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for XCS20-4PQ208C?
XCS20-4PQ208C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your XCS20-4PQ208C order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for XCS20-4PQ208C?
For technical support, including XCS20-4PQ208C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your XCS20-4PQ208C requirements.
6.How does Aetrix verify that XCS20-4PQ208C is sourced from the original manufacturer or authorized distributors?
All XCS20-4PQ208C products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that XCS20-4PQ208C meets industry standards.
7.What is the process for return or replacement of XCS20-4PQ208C?
All XCS20-4PQ208C units undergo pre-shipment inspection (PSI). If there is an issue with XCS20-4PQ208C, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The XCS20-4PQ208C part is unused and in its original packaging.
Return procedure for XCS20-4PQ208C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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