Infineon Technologies CY8C3865LTI-058

Overview

CY8C3865LTI-058 from Infineon Technologies (acquired Cypress Semiconductor) is a programmable system-on-chip (PSoC® 3) integrating an 8051 CPU core, configurable analog and digital peripherals, 64 KB flash, 8 KB SRAM, and full CAN 2.0b interface. It operates from 0.5 V to 5.5 V, supports 67 MHz max CPU speed, and delivers 16-bit delta-sigma ADC with 84 dB SINAD at 48 ksps for precision sensor signal acquisition in industrial control systems.

For engineers reviewing the CY8C3865LTI-058 datasheet, CY8C3865LTI-058 pinout, CY8C3865LTI-058 application, or CY8C3865LTI-058 equivalent, key selection criteria include CAN 2.0b compliance, 24-channel DMA support, CapSense®-enabled GPIO routing, 1.024 V ±0.1% internal reference, and SSOP-48 package compatibility with legacy PSoC 3 designs.

Technical Context

The CY8C3865LTI-058 implements a single-cycle 8051 microcontroller core with AMBA AHB bus architecture, supporting up to 67 MHz operation via internal PLL and 32.768 kHz RTC oscillator. Its digital subsystem includes 24 universal digital blocks (UDBs), four 16-bit timer/counter/PWM modules, and full-speed USB 2.0 PHY with internal oscillator.

Analog functionality centers on a configurable delta-sigma ADC (8–20-bit, up to 192 ksps), four opamps (25 mA drive), four comparators (95 ns response), and a 24-bit DFB for FIR/IIR filtering - all routed through a flexible analog interconnect supporting up to 62 GPIOs as analog inputs.

Key Specifications

Pinout & Package

Package: 48-pin Shrink Small Outline Package (SSOP), body size 10.2 mm × 5.3 mm, lead pitch 0.635 mm, RoHS-compliant, industrial temperature range (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C3865LTI-058, the CY8C3866LTI-060 adds integrated USB PHY functionality at identical package and memory specs, while the CY8C4014LQI-422 trades CAN/USB for ARM ecosystem alignment and reduced feature set - making the CY8C3865LTI-058 optimal for legacy PSoC 3 migration with CAN+USB dual-interface demands.

Availability

CY8C3865LTI-058 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, medical patient monitors, and smart home sensor hubs requiring stable component supply and long-term lifecycle support.

Supply support for CY8C3865LTI-058 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 the PSoC® portfolio, delivering programmable mixed-signal ICs for industrial, automotive, and consumer markets with emphasis on integration and low-power design.

The CY8C38 family belongs to the PSoC 3 platform, designed specifically for applications demanding analog-intensive signal acquisition, real-time control, and flexible peripheral configuration - especially where last-minute firmware-driven hardware changes reduce NRE and time-to-market.

FAQ

Does CY8C3865LTI-058 support CAN FD?

No. The CY8C3865LTI-058 implements only classical CAN 2.0b protocol with 11-bit identifiers and up to 8 bytes per frame. It lacks CAN FD features such as bit rate switching and extended data length. For CAN FD, consider Infineon's TRAVEO™ T2G or newer PSoC 6 families with dedicated CAN FD controllers.

What debug interfaces does CY8C3865LTI-058 provide?

CY8C3865LTI-058 supports JTAG (4-wire), Serial Wire Debug (SWD, 2-wire), and Single Wire Viewer (SWV) for real-time trace. It includes eight address breakpoints, one data breakpoint, and a 4 KB instruction trace buffer - enabling full visibility into CPU execution, peripheral register access, and interrupt latency profiling.

Can all 62 GPIOs be used simultaneously as analog inputs?

Yes, all 62 GPIOs can route analog signals to internal peripherals via the analog interconnect matrix. However, simultaneous sampling depends on ADC configuration: the single delta-sigma ADC supports sequential sampling across up to 62 channels, but only one channel is converted at a time. True parallel sampling requires external multiplexing or additional ADCs.

Is the internal 1.024 V reference usable for external circuits?

No. The 1.024 V ±0.1% internal voltage reference is internally buffered and dedicated to ADC, DAC, and comparator operation. It is not exposed on any pin and cannot drive external loads. For external reference use, designers must employ a separate precision voltage reference IC or derive from VDDA with external regulation.