Infineon Technologies CY8C5666LTI-LP005

Overview

CY8C5666LTI-LP005 from Infineon Technologies (formerly Cypress) is a 32-bit Arm® Cortex®-M3 based programmable system-on-chip (PSoC® 5LP) with up to 256 KB flash, 64 KB RAM, full CAN 2.0b interface, USB 2.0 Full-Speed peripheral, and configurable analog/digital peripherals. It operates from 1.71–5.5 V across –40 to 85 °C, supports ultra-low-power hibernate mode (300 nA), and integrates CapSense® for up to 62 capacitive sensors - used in industrial HMI, medical sensor hubs, and automotive body control modules.

For engineers reviewing the CY8C5666LTI-LP005 datasheet, CY8C5666LTI-LP005 pinout, CY8C5666LTI-LP005 application, or CY8C5666LTI-LP005 equivalent, key selection criteria include its dual ADC architecture (delta-sigma + SAR), 24-channel DMA, programmable UDB array, 80-MHz clock capability, and support for mixed-signal co-design in PSoC Creator™.

Technical Context

The device implements a tightly integrated mixed-signal SoC architecture where the Arm Cortex-M3 CPU core (up to 80 MHz) coordinates programmable digital logic (20–24 UDBs), analog subsystems (4 opamps, 4 comparators, 2 × 12-bit SAR ADCs, 1 × delta-sigma ADC), and flexible routing via Digital System Interconnect (DSI). All peripherals are dynamically assignable to any GPIO.

Its power architecture includes six independent voltage domains, boost regulator (0.5–5 V), and three low-power modes (Active/Sleep/Hibernate) with RAM retention. Clocking combines internal oscillators (1–74 MHz), PLL, external crystal support (4–25 MHz), and 12 programmable dividers routed to any peripheral or I/O.

Key Specifications

Pinout & Package

Package: 68-pin QFN (7 mm × 7 mm, 0.4 mm pitch), thermally enhanced, RoHS-compliant, with exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C5666LTI-LP005, the CY8C5868LTI-LP039 offers greater I/O and USB bandwidth at the cost of larger footprint and higher power in active mode, while the STM32F303VCT6 trades programmable analog/digital flexibility for lower unit cost and broader third-party tool support - making it preferable only when mixed-signal integration is not required.

Availability

CY8C5666LTI-LP005 is available at Aetrix Electronics and suitable for industrial motor control, medical wearable sensor hubs, and automotive body control modules requiring stable component supply, long-term lifecycle assurance, and qualified manufacturing traceability.

Supply support for CY8C5666LTI-LP005 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 AG is a German semiconductor manufacturer specializing in power management, automotive ICs, and embedded security solutions, with global R&D and manufacturing infrastructure.

This device belongs to the PSoC® 5LP product line - designed specifically for rapid development of mixed-signal embedded systems where analog, digital, and firmware functions must be co-optimized within a single chip.

FAQ

Does CY8C5666LTI-LP005 support USB device enumeration without an external crystal?

Yes. The device integrates an internal oscillator qualified for USB 2.0 Full-Speed (12 Mbps) operation, certified under TID#10840032. This eliminates the need for an external 48 MHz crystal or oscillator in most HID and CDC-class applications, reducing BOM cost and PCB area.

What is the maximum number of CapSense® electrodes supported, and how is noise immunity achieved?

CY8C5666LTI-LP005 supports up to 62 self-capacitance or mutual-capacitance electrodes. Noise immunity is achieved through hardware-accelerated correlation-based scanning, shield driver capability, and programmable IDAC current sources - enabling reliable operation in noisy industrial environments with >60 dB SNR at 100 Hz switching noise.

Can the delta-sigma and SAR ADCs operate simultaneously, and what are their respective resolution/speed trade-offs?

Yes. Both ADC types operate independently: the delta-sigma ADC delivers up to 20-bit effective resolution at ≤200 SPS with built-in PGA and filtering, while the dual 12-bit SAR ADCs achieve 1 MSPS per channel with flexible sequencing. Their simultaneous use enables concurrent high-precision temperature measurement and fast motor current sampling in real-time control loops.

Is the UDB array reconfigurable at runtime, or does it require a full device reset?

The UDB array is statically configured at compile time using PSoC Creator™ and loaded during boot or firmware update. Runtime reconfiguration is not supported; however, dynamic peripheral routing via DSI allows signal paths to be remapped between configured UDB instances and I/O pins without resetting the CPU or analog subsystem.