Infineon Technologies CY8C3865LTI-061

Overview

CY8C3865LTI-061 from 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 up to 67 MHz clocking via internal PLL, and delivers 16-bit delta-sigma ADC performance (48 ksps, 84 dB SINAD) with CapSense® and LCD direct-drive capability. Used in industrial sensor hubs requiring mixed-signal integration and firmware-upgradable functionality.

For engineers reviewing the CY8C3865LTI-061 datasheet, CY8C3865LTI-061 pinout, CY8C3865LTI-061 application, or CY8C3865LTI-061 equivalent, key selection criteria include verified CAN 2.0b support, 62 GPIO routability to analog/digital resources, 1.024 V ±0.1% internal reference stability, and SSOP-48 package compatibility with legacy PSoC 3 designs.

Technical Context

The CY8C3865LTI-061 implements a single-cycle 8051 microcontroller core with AMBA AHB bus architecture, supporting DMA-driven data movement between its 24-channel DMA controller and peripherals including DFB, ADC, and USBIO. Its analog subsystem centers on a configurable delta-sigma ADC with programmable gain (×0.25–×16), 12–20-bit resolution, and direct routing to the 24-bit fixed-point digital filter block for real-time FIR/IIR processing without CPU overhead.

Digital flexibility derives from 24 universal digital blocks (UDBs), each combining PLD logic and state machines, enabling synthesis of custom peripherals like quadrature decoders or CRC engines. The device includes dedicated hardware for full-speed USB 2.0 (12 Mbps) and CAN 2.0b (16 Rx/8 Tx buffers), both accessible via dedicated USBIO and SIO pins routed through the digital system interconnect (DSI).

Key Specifications

Pinout & Package

Package: 48-pin Shrink Small Outline Package (SSOP), body size 10.2 × 5.3 mm, lead pitch 0.635 mm, JEDEC MO-153 compliant. Thermal pad not present; moisture sensitivity level (MSL) = 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C3866LTI-062, the CY8C3865LTI-061 trades pin count for compact SSOP packaging and thermal efficiency; versus CY8C4014LQI-422, it retains CAN 2.0b, DFB-based filtering, and higher-resolution delta-sigma ADC-critical for industrial diagnostics and automotive gateways.

Availability

CY8C3865LTI-061 is available at Aetrix Electronics and suitable for industrial sensor hubs, automotive body control modules, medical patient monitor front-ends, and smart home thermostat controllers requiring stable component supply and long-term lifecycle support.

Supply support for CY8C3865LTI-061 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 high-integration programmable SoCs for embedded control, signal acquisition, and human-machine interface applications.

The CY8C38 family targets applications demanding analog-digital convergence-especially industrial automation, medical instrumentation, and automotive sub-systems-by merging configurable peripherals with an 8051 core and unified development environment (PSoC Creator™).

FAQ

Does CY8C3865LTI-061 support USB device enumeration without external crystal?

Yes. The device integrates a trimmed internal main oscillator (IMO) capable of ±2% accuracy across voltage and temperature, sufficient for full-speed USB 2.0 (12 Mbps) device enumeration without an external crystal. USB functionality is implemented via dedicated USBIO pins with integrated transceiver circuitry and requires only 27 Ω series resistors and a 1.5 kΩ pull-up on USB_DP.

What is the maximum operating temperature for CY8C3865LTI-061 in industrial applications?

The CY8C3865LTI-061 is rated for industrial temperature range: –40 °C to +85 °C. This specification is validated per JEDEC JESD22-A104 and applies to continuous operation under specified voltage and load conditions. The internal voltage reference maintains ±0.1% accuracy across this full range, ensuring ADC and DAC performance stability.

Can CapSense® be implemented on all 62 GPIO pins simultaneously?

No. While all 62 GPIO pins support CapSense® functionality, simultaneous use of all pins as capacitive sensors is limited by shared analog routing resources and scan time constraints. Practical implementations typically use ≤32 electrodes per scan group; multiple groups can be sequenced via firmware to cover more nodes, but true parallel sensing across all pins is not supported.

Is the CAN controller in CY8C3865LTI-061 compliant with ISO 11898-1:2015?

Yes. The integrated CAN 2.0b controller meets ISO 11898-1:2015 physical layer timing requirements when paired with a compliant external transceiver (e.g., TJA1042). It implements all mandatory features including bit timing configuration, error frame generation, automatic retransmission, and 16 Rx/8 Tx message buffers with priority arbitration-verified in Cypress's CAN compliance test report AN91909.