Infineon Technologies CY8C5867LTI-LP028

Overview

CY8C5867LTI-LP028 from Infineon Technologies (formerly Cypress) is a 32-bit Arm Cortex-M3-based programmable system-on-chip (PSoC® 5LP) integrating configurable analog/digital peripherals, 256 KB flash, 64 KB RAM, and full-speed USB 2.0 interface. It operates from 1.71–5.5 V across –40 to +85 °C, supports CAN 2.0b, CapSense®, and ultra-low-power hibernate mode (300 nA with RAM retention), targeting embedded control in industrial HMI and medical sensor nodes.

For engineers reviewing the CY8C5867LTI-LP028 datasheet, CY8C5867LTI-LP028 pinout, CY8C5867LTI-LP028 application, or CY8C5867LTI-LP028 equivalent, key selection criteria include its 80-MHz CPU performance, dual ADC architecture (delta-sigma + SAR), flexible UDB-based peripheral synthesis, and routing of any analog/digital function to any GPIO - critical for mixed-signal consolidation and rapid prototyping.

Technical Context

The device implements a tightly coupled architecture where the Arm Cortex-M3 core interfaces directly with a programmable digital subsystem (24 UDBs) and analog subsystem (4 opamps, 4 comparators, 4 SC/CT blocks). Its clocking system includes a 3–74 MHz IMO, PLL up to 80 MHz, and multiple low-power oscillators (1/33/100 kHz ILO, 32.768 kHz WCO).

Peripherals are routed via Digital System Interconnect (DSI) and Analog Routing Matrix, enabling dynamic reconfiguration without hardware changes. The DFB (Digital Filter Block) provides fixed-point 24-bit filtering, while CapSense® supports up to 62 self- or mutual-capacitance sensors using dedicated hardware resources.

Key Specifications

Pinout & Package

CY8C5867LTI-LP028 is housed in a 68-pin QFN package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad, optimized for compact industrial and medical PCBs requiring thermal efficiency and high I/O density.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable SoC applications.

Compared with CY8C5867LTI-LP028, the LP039 offers expanded memory and robustness for complex firmware and harsh environments, while the STM32F412 demands additional analog components and increases PCB complexity - making the PSoC 5LP uniquely advantageous for rapid mixed-signal consolidation.

Availability

CY8C5867LTI-LP028 is available at Aetrix Electronics and suitable for industrial HMI, portable medical devices, automotive body electronics, and smart energy meters requiring stable component supply and long-term lifecycle support.

Supply support for CY8C5867LTI-LP028 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies acquired Cypress Semiconductor in 2020 and now owns and supports the full PSoC® portfolio, delivering high-reliability semiconductor solutions for automotive, industrial, and IoT markets.

CY8C5867LTI-LP028 belongs to the PSoC® 5LP family - designed specifically for embedded systems demanding seamless integration of analog sensing, digital control, and human interface functions in a single chip.

FAQ

Does CY8C5867LTI-LP028 support USB device enumeration without external crystal?

Yes. It integrates an internal oscillator qualified for Full-Speed USB 2.0 (12 Mbps) operation, certified under TID#10840032. No external crystal is required for USB connectivity, reducing BOM cost and board space. The internal oscillator maintains ±0.25% accuracy across voltage and temperature ranges specified in the datasheet.

Can the delta-sigma ADC operate simultaneously with the SAR ADCs?

Yes. The CY8C5867LTI-LP028 supports concurrent operation of its configurable delta-sigma ADC and up to two independent 12-bit SAR ADCs. Each ADC has dedicated clocking, reference, and result registers, allowing synchronized multi-channel acquisition - for example, high-resolution temperature (delta-sigma) and fast transient voltage (SAR) sampling in power monitoring.

What debug interfaces are supported, and is SWD sufficient for full development?

CY8C5867LTI-LP028 supports JTAG (4-wire), SWD (2-wire), SWV, and TracePort. SWD alone provides full debugging capability - including breakpoints, register inspection, and memory read/write - and is the recommended interface for most development due to its minimal pin count and compatibility with MiniProg3 and KitProg debuggers.

Is CapSense® functionality available on all GPIOs, and does it require external components?

Yes. CapSense® can be implemented on any GPIO pin without external RC networks. The hardware engine includes dedicated IDACs, scanning sequencer, and noise rejection logic. Only optional external shield traces or series resistors are needed for extreme EMI environments - all capacitive sensing signal processing occurs on-chip.