The EPF6016QC208-2, a cornerstone of Altera’s (now Intel’s) FLEX 6000 series, stands as a versatile programmable logic device (PLD) engineered to bridge cost efficiency and functional flexibility. Built on the OptiFLEX architecture, this device has long been valued for its role as a low-cost alternative to high-capacity gate arrays, catering to scenarios demanding rapid prototyping, dynamic reconfiguration, and seamless integration across mixed-voltage systems. In this exploration, we delve into its defining features, key specifications drawn from official datasheets, real-world applications spanning industrial control to communication interfaces, and critical technical details—unpacking why it remains a go-to choice for engineers navigating small-to-medium-scale logic design challenges.
EPF6016QC208-2 Basic Overview
The EPF6016QC208-2 is a programmable logic device (PLD) from the FLEX 6000 series by Altera (now part of Intel), designed around the OptiFLEX architecture. Its core positioning is to serve as a low-cost alternative to high-capacity gate arrays, focusing on scenarios requiring rapid prototyping and dynamic function updates (e.g., industrial control prototypes, communication interface adaptation).
Model Decoding
- “EPF6016”: The core identifier of the FLEX 6000 series, integrating 16,000 typical logic gates (expandable to 30,000 gates with extended JTAG boundary scan circuitry) and 1,320 Logic Elements (LEs), covering small-to-medium-scale logic design needs.
- “QC208”: Utilizes a 208-pin Plastic Quad Flat Package (PQFP), balancing pin count and PCB layout flexibility for standard board designs.
- “-2”: Denotes the speed grade, corresponding to timing performance such as a 16-bit counter operating at up to 153 MHz (see the “Timing Performance” section for details).
EPF6016QC208-2 Manufacturer Information
The EPF6016QC208-2 was developed by Altera Corporation (acquired by Intel in 2015). As a pioneer in programmable logic, Altera provides a comprehensive technical support ecosystem:
- Toolchain Compatibility: Supports classic environments (e.g., MAX+PLUS II) and modern platforms (e.g., Quartus Prime), with design input in Verilog, VHDL, and AHDL.
- Technical Support: Global technical services, application notes, and reference designs cover the entire flow from prototyping to mass production.
- Standard Compliance: Adheres to IEEE 1149.1 (JTAG) and PCI Local Bus Specification Revision 2.2, ensuring cross-platform compatibility.
EPF6016QC208-2 CAD Models
EPF6016QC208-2 Features
The EPF6016QC208-2 is an FPGA from Altera's FLEX 6000 series, designed for cost-effective, high-performance applications. Here are its key features based on available datasheets and technical references:
- Logic Elements (LEs): 1,320 LEs provide flexible logic resources for combinatorial and sequential circuits, enabling up to 16,000 typical gates of functionality.
- I/O Capability: Supports 171 user I/Os with individual tri-state control, making it suitable for interfacing with multiple peripherals.
- Interconnect: Features FastTrack® continuous routing for predictable delays, along with dedicated carry chains (for arithmetic operations like adders) and cascade chains (for high-fan-in logic).
- Speed Grade: The "-2" suffix indicates a high-performance variant, with a maximum clock frequency of 153 MHz.
- Low Latency: Achieves 0.5 ns combinatorial delay through optimized routing and logic cell design.
- Supply Voltage: Operates at 5.0 V nominal (4.75V–5.25V range), compliant with PCI 2.2 standards for bus interface applications.
- Low Power: Typical standby current < 0.5 mA, ideal for battery-powered or energy-efficient systems.
- In-System Programmability (ISP): Supports on-the-fly reconfiguration via external controllers or JTAG interface, allowing design updates without board rework.
- JTAG Compliance: Built-in IEEE 1149.1 boundary-scan for system-level testing and debugging.
- Package: 208-pin PQFP (Plastic Quad Flat Pack) with 0.5 mm pitch, measuring 28 mm × 28 mm (surface-mount compatible).
- Temperature Range: Industrial-grade operation from 0°C to 85°C, suitable for harsh environments.
- MultiVolt I/O: Bridges mixed-voltage systems by supporting different I/O standards (e.g., 3.3V and 5V).
- Clock Management: Dedicated low-skew global clock networks for timing-critical applications.
- Pin Compatibility: SameFrame™ design ensures pinout consistency across FLEX 6000 devices, simplifying board layout revisions.
- Obsolete Status: While no longer in production, it remains a viable choice for legacy systems requiring 5V operation and robust logic density.
This device balances cost-effectiveness with scalability, making it suitable for applications like industrial automation, telecommunications, and embedded control systems where 5V compatibility and reliable performance are essential.
OptiFLEX Architecture Block Diagram
The OptiFLEX architecture block diagram of the EPF6016QC208-2 presents a hierarchical, grid-based structure optimized for balanced performance, flexibility, and predictable timing in medium-scale logic designs. At its core lies a matrix of Logic Array Blocks (LABs), each housing 10 Logic Elements (LEs)—the device’s fundamental programmable units. Each LE integrates a 4-input Look-Up Table (LUT) for combinational logic (e.g., gates, multiplexers) and a D flip-flop for sequential logic (e.g., registers, counters), enabling versatile implementation of both combinational and synchronous circuits. Within each LAB, local interconnects facilitate fast signal sharing between adjacent LEs, while two dedicated chains enhance specific operations: carry chains accelerate arithmetic logic (e.g., adders, incrementers) by minimizing carry-propagation delays, and cascade chains optimize high-fan-in logic (e.g., wide multiplexers) through serial LE linking.
Surrounding the LAB matrix, a FastTrack™ interconnect fabric forms the global routing backbone, consisting of horizontal row interconnects and vertical column interconnects. This continuous, non-segmented routing ensures predictable delays—critical for timing closure—with row delays (tROW) and column delays (tCOL) quantified in the timing model to guide design optimization. The FastTrack network connects LABs to I/O Elements (IOEs) positioned along the device perimeter; these IOEs include bidirectional buffers, flip-flops, and MultiVolt™ circuitry, enabling seamless interfacing with 3.3V/5.0V external systems (TTL/CMOS) while supporting hot-swap capabilities for 3.3V variants.
Complementing the logic and routing layers, a low-skew global clock distribution tree distributes up to 4 global control signals (clocks, resets) across the device, ensuring synchronous operation with minimal timing variation. Native JTAG boundary scan circuitry (IEEE 1149.1) is integrated at the periphery, enabling in-system testing without consuming logic resources.
This architecture—combining modular LABs, dedicated acceleration chains, predictable FastTrack routing, and flexible IOEs—empowers the EPF6016QC208-2 to excel in mixed-voltage industrial control, communication interfaces (e.g., PCI), and rapid prototyping, balancing cost, performance, and adaptability for small-to-medium-scale logic tasks.
FLEX 6000 Timing Model
The FLEX 6000 Timing Model serves as a critical framework for quantifying signal propagation delays across the device’s architecture, enabling precise timing analysis and optimization for mixed-voltage, medium-speed applications. It comprehensively models three core components: Logic Elements (LEs), I/O Elements (IOEs), and the FastTrack interconnect fabric. Within LEs, delays characterize combinational logic (4-input LUTs), sequential circuits (e.g., register setup time tSU, clock-to-output delay tCO), and dedicated arithmetic/cascade chains (e.g., tCARRY_TO_CARRY for high-speed addition). IOEs introduce delays for interfacing external signals, including input propagation (tIN_DELAY) and output driver timing (tOD), while accounting for MultiVolt™ compatibility (3.3V/5V) to bridge mixed-voltage systems. The FastTrack interconnect—comprising local, row (tROW), and column (tCOL) routes—adds predictable latency for signal distribution across the array. Engineers leverage these parameters in tools like Quartus Prime to simulate behavior, define timing constraints, and resolve violations (e.g., setup/hold errors). By integrating these delays, the model predicts real-world performance: for instance, combining tSU, tCO, and interconnect latency to calculate a 16-bit counter’s maximum 153 MHz frequency (speed grade -2), validating suitability for industrial control or PCI bus interfaces. Ultimately, the timing model empowers designers to balance speed, power, and resource utilization, ensuring reliable operation in diverse mixed-signal scenarios.
FLEX 6000 Logic Element
The FLEX 6000 Logic Element (LE) is the fundamental programmable building block within a Logic Array Block (LAB), enabling versatile combinational and sequential logic implementation. Structurally, it integrates four core components:
- 4-Input Look-Up Table (LUT): Serves as a function generator, rapidly computing any logic function of up to four variables (data1–data4), forming the basis for combinational logic (e.g., gates, multiplexers).
- Programmable Register: A configurable D flip-flop with asynchronous clear (
CLRN) and preset (PRN) capabilities. It supports D, T, JK, or SR operation, or can be bypassed (via the "Register Bypass" path) to implement pure combinational logic, adapting to mixed combinational-sequential designs.
- Carry Chain: A dedicated hardware path that accelerates arithmetic operations (e.g., adders, counters) by minimizing carry-propagation delays. The "Carry-In" from a preceding LE and "Carry-Out" to the next LE form a continuous chain for efficient arithmetic logic.
- Cascade Chain: Optimizes high-fan-in logic (e.g., wide multiplexers) by serially linking LEs. The "Cascade-In" from a prior LE and "Cascade-Out" to the next LE enable seamless expansion of logic complexity.
Control logic (driven by labctrl1–4 and global reset) manages clock selection, clear/preset behavior, and I/O interfacing. The LE’s output connects to local interconnects (for intra-LAB communication) and the FastTrack™ fabric (for global routing), integrating into the FLEX 6000’s hierarchical architecture.
This design—combining flexible LUT-based logic, programmable sequencing, and specialized acceleration chains—enables efficient implementation of industrial counters, communication interfaces, and signal processing. Design tools (e.g., Quartus Prime) automatically leverage the LE’s hardware features to optimize performance, making it a core enabler of the FLEX 6000’s balance between cost, flexibility, and speed.
FLEX 6000 Logic Array Block
The FLEX 6000 Logic Array Block (LAB) serves as the core organizational unit of the device’s Logic Array, orchestrating the operation of 10 Logic Elements (LEs) while enabling efficient local and global signal routing. Structurally, each LAB features:
- Local Interconnects: Two dedicated local interconnect regions drive the 10 LEs within the LAB, facilitating low-latency signal sharing between adjacent LEs (e.g., for carry/cascade chains in arithmetic or high-fan-in logic). The LAB can also output to these local interconnects, creating bidirectional signal flow.
- Global Routing Interface: The LAB connects to the Row and Column FastTrack Interconnects—the device’s global routing backbone. LEs can directly drive these row/column interconnects, enabling communication with distant LABs, I/O Elements (IOEs), or other system components.
- Adjacent Connectivity: Signals can flow “To/From Adjacent LAB or IOEs,” allowing neighboring LABs to interact via local interconnects (optimizing resource sharing and reducing global routing overhead).
This architecture balances local logic density (via 10 LEs and local interconnects) with global scalability (via FastTrack routing). By aggregating LEs into a modular LAB, the FLEX 6000 efficiently implements medium-scale logic (e.g., counters, state machines) while minimizing signal delay—critical for applications like industrial control and communication interfaces. The LAB’s dual interconnect layers (local for intra-LAB efficiency, global for system-wide integration) exemplify the OptiFLEX architecture’s focus on cost-effective performance and routability.
EPF6016QC208-2 Detailed Specifications
| Type |
Parameter |
| Manufacturer |
Altera/Intel |
| Series |
FLEX 6000 |
| Packaging |
Tray |
| Part Status |
Obsolete |
| Number of LABs/CLBs |
132 |
| Number of Logic Elements/Cells |
1320 |
| Number of I/O |
171 |
| Number of Gates |
16000 |
| Voltage - Supply |
4.75V ~ 5.25V |
| Mounting Type |
Surface Mount |
| Operating Temperature |
0°C ~ 85°C (TJ) |
| Package / Case |
208-BFQFP |
| Supplier Device Package |
208-PQFP (28x28) |
| Base Product Number |
EPF6016 |
EPF6016QC208-2 Application Scenarios
The EPF6016QC208-2 excels in diverse fields due to its low cost, flexible configuration, and multi-voltage compatibility:
- Implements logic control modules (e.g., counters, accumulators, state machines) for tasks like production line pacing and equipment status monitoring.
- Supports real-time response (leveraging the 153 MHz counter performance) for high-speed industrial control.
- Builds interface logic for UART (16450-compatible) and PCI bus targets, simplifying protocol adaptation.
- Uses MultiVolt technology to bridge 3.3V/5.0V buses (e.g., legacy 5V PCI buses with modern 3.3V MCUs).
- Medium-speed signal processing: E.g., 8-bit FIR filters (80 MSPS) and 512-point FFTs (63 MHz), addressing industrial sensor conditioning and medical waveform processing.
- Leverages LAB LUTs and registers for flexible implementation of filtering, transformation, and other algorithms.
- Serves as a low-cost alternative to ASICs, enabling rapid design iteration (via in-system reconfiguration) and significantly reducing time-to-market.
EPF6016QC208-2 Package
| Type |
Parameter |
| Part Number |
EPF6016QC208-2 |
| Package Type |
QFP (Quad Flat Package) |
| Package Designation |
QC208 |
| Pin Count |
208 pins |
| Body Size |
28 mm × 28 mm |
| Maximum Height |
4.1 mm |
| Lead Pitch (Spacing) |
0.5 mm |
| Packaging Type |
Tray (typically for QFP packages) |
EPF6016QC208-2 Strengths and Limitations
Strengths
- Cost-Effective for Mid-Scale Applications: With 1,320 Logic Elements (LEs) (equivalent to ~16,000 gates), it balances logic density and cost, suitable for moderate-complexity designs like industrial control or embedded interfaces.
- Flexible I/O and Voltage Compatibility: Supports 171 user I/Os with MultiVolt technology, enabling integration with mixed-voltage systems (e.g., 3.3V and 5V peripherals), and complies with PCI 2.2 standards.
- Reliable In-System Programming (ISP): Features JTAG (IEEE 1149.1) for on-the-fly reconfiguration, allowing design updates without hardware modification, and supports boundary-scan testing.
- Robust Operation: Industrial temperature range (0°C to 85°C) makes it suitable for harsh environments, and FastTrack routing ensures predictable timing delays.
- Legacy Compatibility: Pin consistency with other FLEX 6000 devices simplifies board revisions, making it a viable drop-in for legacy systems requiring 5V operation.
Limitations
- Obsolete Status: No longer in production, leading to limited availability and potential supply chain risks for new projects.
- Volatile Configuration: SRAM-based, so configuration is lost on power-off; requires an external EEPROM (e.g., Altera EPC series) for persistent operation, adding cost and complexity.
- Limited Logic Density: 1,320 LEs are insufficient for large-scale designs (e.g., complex digital signal processing or high-speed interfaces) compared to modern FPGAs.
- Dependence on Legacy Tools: Requires older software (MAX+PLUS II v10.2+ or Quartus II v9.1-), as newer tools drop support for FLEX 6000 series, hindering modern development workflows.
- Power and Speed Constraints: 5V supply (vs. modern 3.3V/1.8V FPGAs) increases power consumption, and maximum clock speed (153 MHz) lags behind contemporary devices, limiting high-performance applications.
EPF6016QC208-2 Similar Parts
| Specification |
EPF6016QC208‑2 |
EPF6016QC208-3 |
EPF6016QC208-2N |
EPF6016ATC144-1N |
EPF6024AQC240-1 |
EPF6024ABC256-2N |
| Logic Elements (approx.) |
~1,320 |
~1,320 |
~1,320 |
~1,320 |
~1,960 |
~1,960 |
| Gates |
16,000 |
16,000 |
16,000 |
16,000 |
24,000 |
24,000 |
| Speed Grade |
–2 (standard) |
–3 (faster) |
–2 (same as base) |
–1 (slower) |
–1 |
–2 |
| Package Type |
QFP‑208 |
QFP‑208 |
QFP‑208 |
TQFP‑144 |
QFP‑240 |
BGA‑256 |
| Operating Voltage |
5V |
5V |
5V |
3.3V |
5V |
5V |
| I/O Pins |
154 |
154 |
154 |
102 |
199 |
199 |
| Configuration Type |
SRAM-based |
SRAM-based |
SRAM-based |
SRAM-based |
SRAM-based |
SRAM-based |
| Family |
FLEX 6000 |
FLEX 6000 |
FLEX 6000 |
FLEX 6000 |
FLEX 6000 |
FLEX 6000 |
| In-System Reconfigurable |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
| Use Case Tier |
Standard |
High-performance |
Standard (suffix var.) |
Compact layout |
Higher capacity |
Higher capacity (BGA) |
Conclusion
As a representative of the FLEX 6000 series, the EPF6016QC208-2 centers on the OptiFLEX architecture, balancing cost and flexibility for 16,000-gate-scale logic designs:
- Target Scenarios: Industrial control, communication interfaces, signal processing, and prototyping (cost-sensitive, dynamically updatable applications).
- Core Competencies: Predictable timing, multi-voltage compatibility, and a mature development ecosystem.
- Limitation Mitigation: External configuration devices and multi-device cascading partially address SRAM dependence and I/O constraints.
Despite challenges like SRAM configuration dependence and performance limits, the EPF6016QC208-2 remains a key player in the small-to-medium-scale programmable logic market, driven by its cost-effectiveness and flexible design capabilities.
If you are looking for this model of chip, please contact us for the latest stock and quotation!
