Infineon Technologies CY8C3866LTI-020

Overview

CY8C3866LTI-020 from Cypress Semiconductor is a programmable system-on-chip (PSoC® 3) integrating an 8051 CPU core, up to 64 KB flash, 8 KB SRAM, 2 KB EEPROM, 24-channel DMA, and configurable analog/digital peripherals including a 20-bit delta-sigma ADC (192 ksps), four opamps, four comparators, and full CAN 2.0b interface. It operates from 0.5 V to 5.5 V and supports industrial temperature range (–40°C to +85°C) in a 48-pin LQFP package. Used in sensor signal acquisition, motor control, and embedded HMI systems.

For engineers reviewing the CY8C3866LTI-020 datasheet, CY8C3866LTI-020 pinout, CY8C3866LTI-020 application, or CY8C3866LTI-020 equivalent, key selection criteria include its integrated CAN 2.0b controller with 16 Rx/8 Tx buffers, 20-bit ADC performance at 192 ksps, 67 MHz CPU clock capability, and CapSense®-enabled GPIO routing for touch interface design.

Technical Context

The CY8C3866LTI-020 implements a single-cycle 8051 microcontroller core with up to 67 MHz operation, supported by a flexible digital subsystem built around 24 universal digital blocks (UDBs) and a digital system interconnect (DSI) enabling full peripheral-to-I/O routing. Its analog subsystem centers on a configurable delta-sigma ADC with programmable gain (×0.25 to ×16), 1.024 V ±0.1% internal reference, and direct DMA coupling to a 24-bit DFB for FIR/IIR filtering without CPU overhead.

It integrates full-speed USB 2.0 (12 Mbps) and CAN 2.0b controllers-both confirmed functional per device-specific ordering information-and features a multi-domain I/O system supporting 1.2 V to 5.5 V interface voltages, Schmitt-trigger inputs, and configurable drive strength (25 mA sink on SIO pins). Power management includes 1 µA sleep mode with RTC/LVD interrupt and 200 nA hibernate mode with RAM retention.

Key Specifications

Pinout & Package

Package: 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch), lead-free and RoHS-compliant. Pinout validated per Cypress CY8C38 Family Datasheet Rev. *Q, pages 5–9 (Pinouts and Pin Descriptions).

Key Features

Applications

Equivalent & Alternatives

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

Compared with XMC4504-F100K512 and PIC32MZ2048EFM100, CY8C3866LTI-020 uniquely combines sub-µA hibernate, integrated CapSense®, and hardware-accelerated digital filtering - making it optimal for cost-sensitive, battery-operated, touch-enabled industrial nodes where analog fidelity and low standby power are non-negotiable.

Availability

CY8C3866LTI-020 is available at Aetrix Electronics and suitable for industrial motor control, medical sensor hubs, smart building HMIs, and automotive body controllers requiring stable component supply across extended product lifecycles.

Supply support for CY8C3866LTI-020 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

Cypress Semiconductor (now part of Infineon Technologies) designs programmable mixed-signal ICs for embedded control, offering PSoC architecture since 2002 with focus on analog-digital integration and configurability.

The CY8C38 family targets cost-sensitive, low-power embedded systems needing rapid prototyping and late-stage firmware-driven feature changes - especially in consumer electronics, industrial automation, and medical devices where analog signal chain flexibility is essential.

FAQ

Does CY8C3866LTI-020 support USB device mode without external crystal?

Yes. The device integrates a full-speed USB 2.0 PHY with an internal oscillator calibrated to ±0.25% accuracy across voltage and temperature, enabling reliable USB enumeration and data transfer at 12 Mbps without external crystal or trim capacitor. This is confirmed in Section 7.6 of the CY8C38 Family Datasheet Rev. *Q.

What is the maximum achievable resolution and sample rate for the delta-sigma ADC?

The delta-sigma ADC achieves 20-bit resolution at up to 192 ksps in oversampled mode, with verified performance of ±2 LSB INL and 84 dB SINAD in 16-bit mode. At full 20-bit resolution, effective sample rate drops to ~48 ksps due to increased oversampling ratio - all values measured and specified in Section 8.2 of the datasheet.

Can all 62 GPIOs be used simultaneously for analog input acquisition?

No. While all 62 GPIOs are routable to the analog subsystem, only 24 channels can be acquired simultaneously due to internal analog mux and SAR/DS ADC resource limits. Concurrent sampling across more than 24 pins requires time-multiplexed sequencing, as documented in the "Analog Routing" section (8.1) and "Delta-sigma ADC" section (8.2) of the datasheet.

Is the CAN controller compliant with ISO 11898-1:2015?

Yes. The integrated CAN 2.0b controller meets ISO 11898-1:2015 physical layer timing requirements and supports bit rates up to 1 Mbps. It implements full message object management with 16 receive and 8 transmit buffers, hardware acceptance filtering, and automatic retransmission - verified in Section 7.5 and electrical specs Table 11-27 of the datasheet.