CY8C5868AXI-LP035
CY8C5868AXI-LP035 - PSoC 5LP ARM Cortex-M3 MCU 256KB Flash | Infineon
The Infineon CY8C5868AXI-LP035 is a PSoC 5LP programmable system-on-chip microcontroller built around an ARM Cortex-M3 core running at 67 MHz, integrating 256 KB of Flash, 64 KB of SRAM, and configurable analog and digital peripherals in a 100-pin TQFP (14x14 mm) package. It belongs to the CY8C58LP family of high-performance, low-power PSoC devices operating from 1.71 V to 5.5 V across the -40 °C to +85 °C industrial temperature range.
A PSoC (Programmable System-on-Chip) is a mixed-signal MCU that combines an ARM core with Universal Digital Blocks (UDBs), programmable analog blocks such as op-amps, ADCs, DACs, and CapSense touch controllers, plus standard communication interfaces (USB, CAN, I2C, SPI, UART). PSoC 5LP sits within the broader hierarchy: ARM Cortex-M microcontroller -> PSoC family -> programmable SoC -> embedded MCU -> semiconductor. This integration lets one PSoC replace multiple discrete analog ICs, timers, and glue logic on a board.
Key differentiating features of the CY8C5868AXI-LP035 include 256 KB Flash and 64 KB SRAM (versus 64-128 KB on lower-tier PSoC 5LP devices), three SAR ADCs (12-bit, 1 Msps) supporting up to 32 analog inputs via input mux, four 8-bit DACs, four op-amps, four analog comparator blocks, four current DACs, and CapSense touch sensing with hardware autotune. The device offers 24 UDBs (versus 16-20 on smaller PSoC 5LP parts), enabling implementation of custom peripherals, timers, and state machines. Communication interfaces include Full-Speed USB 2.0, I2C, SPI, CAN, and four 16-bit timer/counter/PWM blocks.
Architecturally, the CY8C5868AXI-LP035 uses a Harvard-bus Cortex-M3 with a hardware multiply-accumulate unit, a 32-channel DMA controller, and an interrupt controller with up to 32 NVIC sources. Programmable routing fabric (analog and digital) connects UDBs, analog blocks, and I/O pins with full crossbar flexibility, making the device a true mixed-signal platform. The part is supplied by Infineon (formerly Cypress Semiconductor) under the PSoC 5LP family, with the -LP035 suffix indicating 256 KB Flash, 64 KB SRAM, three ADC modules, and the industrial temperature grade.
Typical applications include industrial motor control, USB peripherals, HMI with CapSense touch buttons and sliders, programmable logic replacements, sensor conditioning front-ends, and low-power IoT edge nodes. Three SAR ADCs make it well suited to multi-sensor data acquisition. USB Full-Speed makes it ideal for HID peripherals and CDC bridges. Hardware CapSense simplifies touch-HMI designs without external touch ICs.
Designers should note the wide 1.71-5.5 V supply range simplifies designs powered directly from a single-cell Li-ion or 3.3 V/5 V rails without an additional LDO. The exposed thermal pad of the TQFP-100 must be soldered to a copper pour for thermal dissipation, and decoupling capacitors of 0.1 µF + 1 µF + 10 µF should be placed within 3 mm of each power pin. Programming is via SWD or JTAG using PSoC Creator 4.x or ModusToolbox IDE.
This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design considerations not found in the manufacturer datasheet alone.
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