iCE40LP384-SG48
iCE40LP384-SG48 - 384 LUT Ultra-Low-Power FPGA | Lattice Semi
The Lattice Semiconductor iCE40LP384-SG48 is an ultra-low-power Field Programmable Gate Array (FPGA) from the iCE40 LP family, delivering 384 Look-Up Tables (LUTs) in a 48-pin QFN (SG48) package with 1.2V core voltage and 21 user I/O. It is fabricated on a 40 nm CMOS process optimized for minimal static and dynamic power consumption, targeting mobile, handheld, and energy-harvesting designs where battery life dominates the bill of materials. The device integrates a hardened I2C core, SPI configuration interface, and on-chip PLL blocks, providing a complete glue-logic platform in a sub-1 mW active power envelope.
An FPGA (Field Programmable Gate Array) is a semiconductor integrated circuit composed of configurable logic blocks (LUTs), programmable interconnect, and I/O cells that can be re-programmed to implement arbitrary digital logic. Low-power FPGAs such as the iCE40 LP family occupy a unique tier in the programmable logic hierarchy - sitting above fixed-function ASICs (which offer zero flexibility) and below high-density FPGAs from Xilinx and Intel (which offer millions of LUTs at the cost of watts). The iCE40 LP family is the de-facto choice when an application needs custom logic, multiple interfaces, or hardware acceleration, but the system can only afford a few hundred microwatts of quiescent draw. Within the Lattice portfolio, iCE40LP sits between the older iCE65 and the higher-density ECP5 family.
Key features include 384 4-input LUTs, 21 user I/O pins, embedded RAM (4 kbits block RAM equivalent), two 16-bit timers/counters, two I2C controllers, one SPI controller, and a hard PLL supporting clock multiplication. The device operates from a 1.14 V to 1.26 V core supply with separate I/O bank supplies from 1.71 V to 3.465 V, enabling direct interfacing to 1.8 V, 2.5 V, and 3.3 V peripherals. Typical static current is below 100 uA at 25 C, and active current scales linearly with toggle rate and logic utilization.
Architecturally, the iCE40LP384 uses a non-volatile SRAM configuration cell (volatile SRAM, but loaded from NV memory at boot) backed by NVCM or SPI Flash. Logic is implemented as 4-input LUTs feeding a programmable interconnect fabric, with carry chains for arithmetic and block RAM for storage. The hard I2C and SPI controllers reduce LUT usage for common bus interfaces, leaving more logic free for application-specific state machines and datapaths.
Typical applications include mobile device glue logic, IoT sensor hubs, wearable sensor aggregation, low-power display controllers (SPI/parallel LCD), handheld medical peripherals, and battery-powered industrial sensor nodes. The 48-pin QFN package balances I/O count with hand-solder-friendly footprint for prototype work.
When designing with this device, remember that the 1.2 V core rail must be sequenced within 50 ms of the I/O rails to prevent I/O cell back-powering through ESD diodes. Use the Lattice iCEcube2 design suite for synthesis, place-and-route, and bitstream generation.
USD $2.10
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