ICE40HX8K-CB132 Datasheet, Pinout, Equivalents, and Specs

The ICE40HX8K-CB132 is a high-performance, low-power Field-Programmable Gate Array (FPGA) from Lattice Semiconductor's iCE40 family. It is engineered to solve the challenge of integrating complex logic functions in space- and power-constrained applications. By providing a substantial number of logic cells, embedded memory, and flexible I/O in a compact BGA package, this device enables designers to implement custom digital logic, bridge disparate interfaces, and accelerate processing tasks in products ranging from mobile devices and IoT sensors to industrial and consumer electronics.

What is the ICE40HX8K-CB132?

The ICE40HX8K-CB132 is a member of the Lattice iCE40 "HX" series, which stands for "High-Performance." This series is optimized to provide the maximum logic density and features within the ultra-low-power iCE40 architecture. The device is fabricated on a low-power process technology and operates with a core voltage of 1.2V, making it highly suitable for battery-powered or thermally sensitive systems. At its core, the ICE40HX8K-CB132 is a sea of programmable logic gates that can be configured by a hardware description language (HDL) like Verilog or VHDL to perform nearly any digital function.

The fundamental building block of the FPGA fabric is the Logic Cell (LC). The ICE40HX8K-CB132 contains 7680 of these LCs. Each LC consists of a 4-input look-up table (LUT4), a D-type flip-flop, and associated carry and cascade logic. The LUT4 can be programmed to implement any Boolean logic function of up to four inputs. These LCs are grouped into Programmable Logic Blocks (PLBs), which are then interconnected by a flexible routing fabric. This architecture allows for the efficient implementation of both simple combinatorial logic and complex sequential state machines.

Beyond the logic fabric, the device integrates several key hardware resources. It includes 128 kbits of Embedded Block RAM (EBR), organized into 16 individual 8-kbit blocks. This on-chip memory is essential for buffering data, implementing FIFOs, or creating small processor memory spaces. For clock management, the device features two Phase-Locked Loops (PLLs). These can take a single input clock and generate multiple clocks of different frequencies and phase shifts, which is critical for managing complex timing domains within a system-on-chip (SoC) design. The device also includes hardened IP for common serial interfaces: two I2C controllers and two SPI controllers. Using this hard IP saves valuable logic cells and simplifies design effort compared to implementing these protocols in soft logic.

Configuration of the FPGA is handled post-power-up by loading a "bitstream" file. While the device contains a one-time programmable Non-Volatile Configuration Memory (NVCM), the most common method is to use an external, low-cost SPI flash memory chip. At power-on, the FPGA's master SPI engine automatically reads the bitstream from the external flash and configures its internal logic, memory, and I/O. This approach provides excellent design flexibility, allowing for in-field firmware updates by simply reprogramming the external flash memory.

Pinout Configuration and Packaging

The ICE40HX8K-CB132 is offered in a 132-ball Chip Scale BGA (csBGA) package. The "CB132" designator in the part number explicitly defines this package type. With dimensions of 8x8 mm, this package offers a very high I/O-to-footprint ratio, making it an excellent choice for designs where PCB area is at a premium. However, the 0.5mm ball pitch requires more advanced PCB manufacturing and assembly capabilities, such as microvias or via-in-pad technology, for effective routing, especially for designs that utilize a high percentage of the available I/O.

The 132 pins can be categorized into several functional groups:

• User I/O: The CB132 package provides up to 95 general-purpose user I/O pins. These are organized into different I/O banks, each of which can be powered by a separate VCCIO supply. This allows the FPGA to interface directly with other components operating at different voltage levels (e.g., a 1.8V processor and a 3.3V sensor) without the need for external level-shifting logic.
• Power Supply Pins: Multiple pins are dedicated to power. This includes VCC for the 1.2V core logic, VCCIO for the I/O banks (which can range from 1.2V to 3.3V), and VPP_2V5 for the on-chip configuration and programming interface. Proper decoupling with capacitors placed close to each pin is critical for stable operation.
• Configuration Pins: A dedicated set of pins is used for configuration. For the common SPI master boot mode, these include SPI_SS_B (Slave Select), SPI_SCK (Clock), SPI_SI (Master Out/Slave In), SPI_SO (Master In/Slave Out), CRESET_B (Configuration Reset), and CDONE (Configuration Done). These pins connect directly to the external SPI flash memory.
• Clock Input Pins: There are dedicated pins designed to receive external clock signals. These inputs are routed to a global clock network (and the PLLs) to provide low-skew clock distribution throughout the FPGA fabric, which is essential for high-performance synchronous designs.

A detailed pinout diagram is available in the official Lattice datasheet. When starting a new design, it is crucial to consult this document to plan I/O assignments, as certain pins have special functions (like clock inputs or configuration roles) and some I/O standards may be restricted to specific banks.

Core Architectural Features

• High-Density Logic Fabric: The device is built around a fabric of 7680 Logic Cells (LCs). Each LC contains a 4-input Look-Up Table (LUT4) and a register, providing the fundamental building blocks for implementing any digital logic function, from simple glue logic to complex state machines and arithmetic units.
• Flexible Embedded Block RAM (EBR): It integrates 128 kbits of dedicated, true dual-port RAM. This memory is arranged in 16 blocks of 8 kbits each. These blocks can be cascaded and configured in various width/depth combinations (e.g., 256x32, 512x16, 1kx8) to efficiently implement FIFOs, data buffers, and small processor memory systems without consuming general-purpose logic resources.
• Advanced Clock Management: Two on-chip Phase-Locked Loops (PLLs) provide sophisticated clock synthesis and management. They can perform frequency multiplication/division and phase shifting, allowing a single low-cost external crystal to generate all required internal and external system clocks, simplifying board design and reducing jitter.
• Integrated Hard IP Blocks: To save logic resources and reduce design complexity, the ICE40HX8K-CB132 includes hardened intellectual property blocks for common functions. It features two I2C and two SPI controller blocks, enabling robust and efficient communication with peripherals like sensors, memory, and microcontrollers.
• Programmable I/O with Multi-Voltage Support: The device features flexible I/O banks that can be independently powered. This allows the FPGA to support a range of I/O standards, including LVCMOS and LVTTL at 3.3V, 2.5V, 1.8V, and 1.5V/1.2V. This capability makes it an ideal bridging device in mixed-voltage systems, eliminating the need for external level translators.

Specifications Parameter Table

ICE40HX8K-CB132 Equivalents, Cross Reference & Lifecycle

The ICE40HX8K-CB132 is an active, production-status component widely used in new designs. When considering alternatives, it's important to differentiate between pin-compatible replacements and functional equivalents.

For FPGAs, a direct, drop-in replacement is typically only another device from the exact same family, in the same package, and with the same or greater logic capacity. A potential alternative within the family could be the ICE40HX4K-CB132, which is pin-compatible but has fewer logic cells (3840 LCs). This could be an option if a design is found to not require the full 8K logic capacity of the HX8K, potentially offering a cost reduction. However, the bitstream would need to be recompiled for the smaller device.

If the CB132 BGA package is a constraint, the ICE40HX8K is also available in a 144-pin TQFP package (ICE40HX8K-TQ144). While functionally identical in terms of logic, this is not a pin-compatible replacement and would require a complete board redesign. It does, however, simplify PCB manufacturing and hand-assembly.

For new designs requiring more advanced features like DSP blocks for hardware multiplication, more on-chip RAM, or even faster performance, designers should evaluate the Lattice iCE40 UltraPlus™ series. While not a direct replacement, the UltraPlus family represents a modern migration path with a similar low-power focus and is supported by the same design tools. As always, verify stock and lead times for any component before committing to a design. You can Check ICE40HX8K-CB132 Inventory & Pricing to get the latest availability information.

Typical Applications & Circuit Considerations

The combination of high logic density, embedded RAM, and low power consumption makes the ICE40HX8K-CB132 extremely versatile. It excels in applications that require custom, real-time processing where a standard microcontroller is too slow or a larger, more power-hungry FPGA is overkill.

Common system-level use cases include:

• Sensor Hub and Data Aggregation: Collecting data from multiple low-speed sensors (e.g., I2C accelerometers, SPI pressure sensors) and aggregating it, pre-processing it, and streaming it over a single faster interface to a host processor.
• Embedded Vision Interface: Interfacing with parallel or serial CMOS image sensors. The FPGA can handle the real-time demands of pixel clocking, line/frame synchronization, and can perform initial image processing tasks like Bayer-to-RGB conversion, color space conversion, or simple filtering.
• Motor Control and Robotics: Implementing multiple, precise PWM generators for motor drivers, reading quadrature encoder feedback for closed-loop position control, and creating custom communication protocols between system components.
• LED Display Drivers: Driving large arrays of LEDs, such as in video walls or complex status displays, where the FPGA's parallelism allows for high refresh rates and complex patterns that would be impossible for a microcontroller to generate in real-time.
• Custom Logic and Interface Bridging: Serving as "digital glue" to connect disparate ICs, replacing multiple older discrete logic chips, or creating a bridge between a modern processor and a legacy parallel bus.

When designing a board with the ICE40HX8K-CB132, several circuit considerations are paramount. First, the power delivery network must be robust. The 1.2V core (VCC) and all active I/O banks (VCCIO) require thorough decoupling. A common practice is to place a 0.1µF ceramic capacitor as close as possible to each power pin, supplemented by larger bulk capacitors (1µF to 10µF) nearby for each power rail. Second, the configuration circuit, typically an 8-pin SOIC SPI flash chip, must be connected correctly to the dedicated configuration pins. The trace lengths in this circuit should be kept reasonably short. Finally, for the csBGA package, PCB layout is critical. A multi-layer board (4 layers minimum) is practically a requirement for routing signals from the inner balls of the BGA. Consultation with your PCB fabricator regarding their capabilities for fine-pitch BGAs and microvias is highly recommended. For more ideas and components, you can Browse iCE40 Series to see the full range of options.

Video Demonstration

Frequently Asked Questions (ICE40HX8K-CB132 FAQ)

What toolchain is used to program the ICE40HX8K-CB132?

The ICE40HX8K-CB132 is supported by two primary toolchains. The official tool from Lattice is the Lattice Radiant Software or the older iCEcube2 Design Software. Additionally, this FPGA is exceptionally popular in the open-source community and has robust support from the "Project IceStorm" toolchain, which includes Yosys for synthesis, nextpnr for place-and-route, and icepack/iceprog for bitstream generation and programming. This open-source support is a significant advantage for developers, hobbyists, and those who prefer a command-line-driven workflow.

How is the ICE40HX8K-CB132 configured at power-up?

The device is SRAM-based, meaning its configuration is volatile and must be loaded each time it is powered on. The most common configuration mode is Master SPI, where the FPGA acts as the SPI master and automatically reads a configuration bitstream from an external, low-cost SPI flash memory chip. This process is autonomous and begins immediately after the device is powered and the reset pin is released. The CDONE pin signals when the configuration process is successfully completed.

What is the difference between the iCE40 HX and LP series?

Both are part of the iCE40 family, but they are optimized for different goals. The "HX" series (High-Performance) is designed to offer the highest logic density (more Logic Cells) and features like more embedded RAM and PLLs for a given die size. The "LP" series (Low-Power) is optimized for the absolute lowest static and dynamic power consumption, often at the cost of slightly lower logic density. The ICE40HX8K is therefore suited for more complex logic tasks, while an LP-series part might be chosen for a simple, always-on, battery-powered monitoring function.

What are the power supply requirements for this FPGA?

The ICE40HX8K-CB132 requires at least two different voltages for operation. A stable 1.2V supply is needed for the internal core logic (VCC pins). Additionally, one or more I/O supply voltages (VCCIO pins) are required for the I/O banks. These VCCIO rails can be set to match the logic levels of the devices the FPGA is interfacing with, supporting standards like 3.3V, 2.5V, 1.8V, etc. It's crucial to provide proper power sequencing and decoupling for all supply rails as specified in the datasheet.

Is the ICE40HX8K-CB132 suitable for high-speed interfaces like PCIe or DDR memory?

No, the iCE40 family, including the HX8K, is not designed for such high-speed interfaces. It lacks the dedicated multi-gigabit SERDES (Serializer/Deserializer) transceivers required for protocols like PCI Express, USB 3.0, or SATA. Similarly, it does not have the specialized I/O and memory controller hardware needed for interfacing with DDR SDRAM. This FPGA is best suited for low-to-medium-speed interfaces like SPI, I2C, I2S, and parallel buses up to a few hundred MHz depending on the design.