Infineon Technologies CY8C3866LTI-207T

Overview

CY8C3866LTI-207T from Infineon Technologies (formerly Cypress) is a programmable System-on-Chip (PSoC® 3) integrating an 8-bit 8051 CPU, configurable analog/digital peripherals, 64 KB flash, 8 KB RAM, and full CAN 2.0b interface - all in a 72-pin WLCSP package rated for –40 to +85 °C operation at up to 67 MHz. It targets embedded control systems requiring mixed-signal integration, low-power operation (200 nA hibernate), and on-chip CapSense® for touch interfaces.

For engineers reviewing the CY8C3866LTI-207T datasheet, CY8C3866LTI-207T pinout, CY8C3866LTI-207T application, or CY8C3866LTI-207T equivalent, key selection criteria include its 72-pin WLCSP footprint, 67-MHz 8051 core with DMA and DFB, integrated delta-sigma ADC (8–20-bit), four opamps, full CAN 2.0b support (16 Rx/8 Tx buffers), and USB 2.0 Full-Speed peripheral capability.

Technical Context

The CY8C3866LTI-207T implements a unified PSoC 3 architecture where digital logic is synthesized via 16–24 Universal Digital Blocks (UDBs), each combining PAL/PLD and state machine resources. Its analog subsystem includes programmable SC/CT blocks, four opamps, and a configurable delta-sigma ADC with up to 20-bit resolution and internal 1.024 V ±0.1% reference.

Clock flexibility is achieved through multiple sources: 3–62 MHz internal oscillator (±1% at 3 MHz), 4–25 MHz external crystal, PLL up to 67 MHz, and low-power oscillators at 1/33/100 kHz plus 32.768 kHz watch crystal input. All clocks are routed via 12 dividers to any peripheral or I/O.

Key Specifications

Pinout & Package

Package: 72-pin Wafer-Level Chip Scale Package (WLCSP), 4.2 mm × 4.2 mm, 0.4 mm pitch, bottom-side solder balls. Designed for ultra-compact PCB layouts and automated assembly in portable and medical devices.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C3866AXI-063 and CY8C5868LTI-LP097, the CY8C3866LTI-207T uniquely balances ultra-compact WLCSP packaging, integrated CAN 2.0b, hardware-accelerated CapSense®, and sub-µA hibernate - making it optimal for volume production of space- and power-constrained embedded nodes.

Availability

CY8C3866LTI-207T is available at Aetrix Electronics and suitable for industrial motor control, medical wearable sensor hubs, and automotive body control modules requiring stable component supply across long product lifecycles.

Supply support for CY8C3866LTI-207T 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 is a global semiconductor leader headquartered in Munich, Germany, delivering power systems, microcontrollers, sensors, and security solutions for industrial, automotive, and IoT markets.

This device belongs to the PSoC® 3 family - designed specifically for highly integrated, low-power embedded control applications where analog/digital configurability, small form factor, and rapid system-level design iteration are critical.

FAQ

Does CY8C3866LTI-207T support USB device functionality without external crystal?

Yes. The part integrates a USB 2.0 Full-Speed (12 Mbps) peripheral interface certified by USB-IF (TID#40770053) and operates using its internal oscillator - eliminating the need for an external 48-MHz crystal or oscillator circuit. This reduces BOM cost and PCB area while maintaining USB compliance.

What is the maximum achievable resolution of the delta-sigma ADC?

The delta-sigma ADC supports configurable resolution from 8-bit to 20-bit. At 20-bit mode, it achieves effective resolution of 18.2 bits with 100-SPS sampling rate and internal 1.024 V reference. Oversampling and digital filtering are handled in hardware, requiring no firmware intervention.

Can CapSense® operate reliably in noisy industrial environments?

Yes. CapSense® uses shielded sensor routing, hardware-based noise rejection (including spread-spectrum modulation and correlation filtering), and adaptive baseline tracking. It maintains stable operation under 10 Vpp conducted noise and 30 V/m radiated EMI - validated per IEC 61000-4-3 and -4-6 standards.

Is the 72-pin WLCSP reworkable using standard SMT processes?

Yes. The CY8C3866LTI-207T's 72-pin WLCSP uses standard SnAgCu (SAC305) solder balls with 0.4 mm pitch and conforms to IPC/JEDEC J-STD-020 moisture sensitivity level 3. Rework is supported using vapor-phase or infrared reflow with profile matching JEDEC MSAL-20.2 guidelines.