CY8C5868AXI-LP035 - PSoC 5LP ARM Cortex-M3 MCU 256KB Flash | Infineon
MPN: CY8C5868AXI-LP035 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $33 | $33.00 |
| 10 | $29.7 | $297.00 |
| 100 | $26.4 | $2,640.00 |
| 500 | $23.1 | $11,550.00 |
| 1,000 | $19.8 | $19,800.00 |
CY8C5868AXI-LP035 Overview
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.
Drop-in alternatives for CY8C5868AXI-LP035 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with CY8C5868AXI-LP035 (same form factor and footprint) — differing in Package, Communication Interfaces, Op-Amps, Operating Temperature, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
CY8C5868AXI-LP038
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY8C5888AXI-LP043
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY8C5688AXI-LP099
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$11.75 / Unit
View Datasheet →CY8C5568AXI-060
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY8C5668AXI-LP010
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY8C5868AXI-LP035 Maximum Ratings & Electrical Characteristics
| Core Architecture | ARM Cortex-M3 (32-bit) |
| Family | PSoC 5LP (CY8C58LP) |
| Maximum CPU Clock | 67 MHz |
| Flash Memory | 256 KB (256K x 8) |
| SRAM | 64 KB |
| Operating Voltage Range | 1.71 V to 5.5 V |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| SAR ADCs | 3 x 12-bit, up to 1 Msps |
| DACs | 4 x 8-bit |
| Op-Amps | 4 |
| Comparators | 4 |
| Universal Digital Blocks (UDBs) | 24 |
| Communication Interfaces | USB 2.0 Full-Speed, CAN, I2C, SPI, UART |
| Package | 100-pin TQFP (14x14 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
CY8C5868AXI-LP035 100-pin tqfp (14x14 mm) Pin Configuration Guide
Pin configuration for CY8C5868AXI-LP035 (100-pin tqfp (14x14 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for CY8C5868AXI-LP035.
Refer to the datasheet for full pin configuration.
Typical Applications
CY8C5868AXI-LP035 is suitable for 6 applications: USB HID Peripherals (Keyboards / Mice / Custom Input Devices), Industrial Motor Control and Sensor Conditioning, CapSense Touch HMI (Buttons, Sliders, Proximity Sensors), Programmable Logic Replacement (Custom Timers, State Machines), IoT Edge Sensor Node with USB Connectivity, Medical Patient Monitoring and Diagnostic Devices.
USB HID Peripherals (Keyboards / Mice / Custom Input Devices)
The CY8C5868AXI-LP035 is a strong fit for USB HID peripherals because the integrated Full-Speed USB 2.0 controller eliminates the need for an external PHY, and 256 KB Flash supports HID class drivers, firmware update bootloaders, and composite device stacks simultaneously. Three SAR ADCs at 1 Msps can sample analog thumbsticks, pressure pads, or gaming sensors in real time without DMA conflicts. The Cortex-M3 at 67 MHz delivers deterministic HID report latency under 1 ms. For a 3.3 V keyboard design, only 0.1 uF + 1 uF + 10 uF decoupling per power pin is required, plus a USB ESD array on D+/D-. Versus a discrete MCU + external PHY, this PSoC 5LP part reduces BOM to the MCU alone.
Recommended
Industrial Motor Control and Sensor Conditioning
The CY8C5868AXI-LP035 fits industrial motor control applications through four on-chip op-amps for current-sense amplification, three 12-bit SAR ADCs for back-EMF and torque feedback, and four 8-bit DACs for motor reference profiles. 24 Universal Digital Blocks can implement custom PWM, dead-band insertion, and field-oriented control timers without external logic. The 1.71-5.5 V supply range accepts 24 V industrial buses via a step-down converter. Compared to discrete MCU + op-amp + gate driver designs, this single-chip approach reduces PCB area by 30-40%. The industrial -40 C to +85 C temperature rating supports factory automation environments per typical MS-3 ambient environments.
Recommended
CapSense Touch HMI (Buttons, Sliders, Proximity Sensors)
The CY8C5868AXI-LP035 supports CapSense touch HMI through hardware auto-scan-to-capacitance conversion, dedicated CapSense peripheral, and 24 UDBs that can host custom gesture and water-tolerance algorithms. Three SAR ADCs plus the CapSense block can coexist on the same device, enabling proximity + touch + analog multi-touch. 256 KB Flash fits CapSense firmware, gesture libraries, and an optional GUI USB bridge. Supply can be 3.3 V or 5 V via a single rail. Compared to discrete touch ICs, integrating CapSense onto the host eliminates an extra MCU and inter-chip communication, reducing BOM in touch-panel latency to <5 ms.
Recommended
Programmable Logic Replacement (Custom Timers, State Machines)
The CY8C5868AXI-LP035 replaces small CPLDs and 74-series glue logic through its 24 Universal Digital Blocks (UDBs), which can be configured as timers, PWM, quadrature decoders, UARTs, SPI slaves, or custom state machines via PSoC Creator schematic capture. This makes the device ideal for replacing legacy GAL/CPLD logic on industrial control boards where PCB redesign is undesirable. The Cortex-M3 can run supervisory control while UDBs handle deterministic timing-critical I/O in parallel. Versus a discrete CPLD, this approach offers 10x the logic capacity at similar cost, plus 256 KB program space for the host MCU.
Recommended
IoT Edge Sensor Node with USB Connectivity
The CY8C5868AXI-LP035 is well matched to IoT edge sensor nodes because three SAR ADCs handle multi-sensor sampling (temperature, humidity, pressure), while the on-chip op-amps and DACs simplify analog front-end design without external conditioning ICs. Full-Speed USB provides a direct wired data link to a host (HID, CDC, or vendor-specific class) without WiFi/BLE radios, ideal for industrial USB-based sensor pods. The 1.71-5.5 V supply supports direct Li-ion (3.0-4.2 V) or 3.3 V LDO operation, reducing power tree complexity. Versus a discrete MCU + sensor AFE, this approach consolidates the analog front-end and host MCU into a single chip.
Recommended
Medical Patient Monitoring and Diagnostic Devices
Recommended
Recommended Products Summary
Engineering reference data for CY8C5868AXI-LP035 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CY8C5868AXI-LP038 | CY8C5888AXI-LP043 | CY8C5688AXI-LP099 | CY8C5568AXI-060 | CY8C5668AXI-LP010 |
|---|---|---|---|---|---|---|
| Package | 100-pin TQFP (14x14 mm) | 100-pin TQFP - same | 100-pin TQFP - same | 100-pin TQFP - same | 100-pin TQFP - same | 100-pin TQFP - same |
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | Infineon |
| Core | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 |
| Flash Memory | 256 KB | 256 KB | 256 KB | 256 KB | 64 KB | 256 KB |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 16 KB | 64 KB |
| CPU Clock | 67 MHz | 67 MHz | 67 MHz | 67 MHz | 67 MHz | 67 MHz |
| SAR ADCs | 3 x 12-bit | 3 x 12-bit | 3 x 12-bit | 3 x 12-bit | 2 x 12-bit | 2 x 12-bit |
| Universal Digital Blocks (UDBs) | 24 | 24 | 24 | 20 | 16 | 16 |
| USB 2.0 Full-Speed | Yes | Yes | Yes | Yes | Yes | Yes |
| Supply Voltage Range | 1.71 V to 5.5 V | 1.71 V to 5.5 V | 1.71 V to 5.5 V | 1.71 V to 5.5 V | 1.71 V to 5.5 V | 1.71 V to 5.5 V |
| Temperature Range | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
Key Differentiators
- Largest Flash within CY8C58LP family at 256 KB (vs CY8C5568AXI-060)
- Three SAR ADCs with 1 Msps sampling (vs CY8C5668AXI-LP010)
- Highest Universal Digital Block count at 24 (vs CY8C5688AXI-LP099)
Design Notes
The CY8C5868AXI-LP035 requires separate analog (VDDA) and digital (VDDD) supply pins, each with a 0.1 uF + 1 uF + 10 uF decoupling network placed within 3 mm of the IC. Power sequencing: VDDD must be stable before VDDA ramps if VDDA > VDDD + 0.5 V. A ferrite bead between VDDA and VDDD reduces analog noise coupling by 20-30 dB per the Infineon PSoC 5LP hardware design guide. Avoid routing high-speed digital signals directly under analog supply pins to minimize substrate noise injection into ADC measurements.
The TQFP-100 package of the CY8C5868AXI-LP035 should be soldered to a copper pour connected through the exposed thermal pad to a 1 square inch copper area minimum on the top-side or inner layer. The package theta_JA is approximately 25-30 C/W with a 4-layer 1-oz PCB. At 67 MHz CPU + USB + three ADC sampling at full rate, typical power dissipation is 0.5-1.5 W depending on active analog blocks. Industrial -40 C to +85 C ambient operation is achievable with the recommended PCB layout. Estimated junction temperature rise at 1 W dissipation: 25-30 C above ambient - well within the 150 C maximum junction rating.
For USB designs using CY8C5868AXI-LP035, route D+ and D- as a 90-ohm differential pair with length matching within 150 mil, and place a 27-ohm series resistor at the MCU D+/D- pins per USB 2.0 Full-Speed specification. Keep USB signals away from switching power inductors and high-current traces. The crystal oscillator traces (32.768 kHz watch crystal or 3-24 MHz main crystal) should be guarded by GND and kept short. JTAG/SWD traces (SWDIO, SWDCLK, XRES) should be no longer than 4 inches with 0-5 K ohm pull-ups on SWDIO and XRES per Infineon PSoC 5LP programming guide.
Common pitfalls with CY8C5868AXI-LP035: (1) Do not leave the XRES pin floating - it must have a 10 kohm pull-up to VDDX. (2) The CapSense scanning requires firmware calibration per the Infineon CapSense design guide; floating inputs can cause false triggers. (3) Do not exceed 5.5 V on any GPIO pin including USB D+/D- - damage is permanent. (4) When migrating from PSoC 3 to PSoC 5LP, the IDE is PSoC Creator 4.x; legacy PSoC Designer projects require migration. (5) The ADC reference voltage (VREF) is internal by default; external VREF requires bypassing with 1 uF and 0.1 uF caps at the VREF pin.
Compliance Information
RoHS and lead-free compliance per Infineon product page. Not AEC-Q100 qualified - automotive applications should use CY8C5868AXI-LP035-A variant or PSoC 4 automotive family. Halogen-free status not explicitly stated in the verified web data; verify with Infineon environmental compliance documents before PCB fabrication.
