Infineon Technologies CY8C3665PVI-080

Overview

CY8C3665PVI-080 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 12-bit delta-sigma ADC (192 kSPS, 66 dB SINAD), four opamps, four comparators, and full CAN 2.0b interface - deployed in industrial sensor nodes and embedded control systems requiring mixed-signal reconfigurability.

For engineers reviewing the CY8C3665PVI-080 datasheet, CY8C3665PVI-080 pinout, CY8C3665PVI-080 application, or CY8C3665PVI-080 equivalent, key selection criteria include its 48-pin SSOP package, –40 °C to +85 °C industrial temperature rating, USB 2.0 FS support, CapSense®-enabled GPIO routing, and dual-domain I/O voltage flexibility (1.2 V to 5.5 V).

Technical Context

The CY8C3665PVI-080 implements a single-cycle 8051 microcontroller core operating up to 67 MHz with multiply/divide instructions, supported by a 24-channel PHUB-based DMA controller enabling zero-CPU-overhead data movement between peripherals and memory. Its digital subsystem centers on 24 universal digital blocks (UDBs) for custom logic synthesis and includes dedicated hardware for CAN 2.0b (16 Rx/8 Tx buffers), Full-Speed USB 2.0 (12 Mbps), and four 16-bit timer/counter/PWM modules.

Analog functionality is anchored by a 1.024 V ±0.1% internal reference, a configurable delta-sigma ADC (8–12-bit, ×0.25–×16 PGA gain), four 8-bit IDACs/VDACs (8 Msps/1 Msps), four rail-to-rail opamps (25 mA drive), and four comparators (95 ns response). All analog and digital resources interconnect via programmable routing to 62 GPIOs and eight special I/Os (SIOs), with LCD direct-drive capability up to 46×16 segments.

Key Specifications

Pinout & Package

Package: 48-pin SSOP (Small Outline Integrated Circuit), 0.635 mm pitch, body size 15.4 mm × 7.6 mm, RoHS-compliant, industrial temperature grade (–40 °C to +85 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with XMC4500-F100K1024 AC and PIC18F87J90, CY8C3665PVI-080 uniquely delivers field-reprogrammable analog/digital blocks, sub-µA hibernate with RAM retention, and CapSense® on any GPIO - making it optimal for rapidly evolving sensor-edge devices where hardware reuse and firmware-driven feature updates are critical.

Availability

CY8C3665PVI-080 is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body controllers, medical front-ends, and smart home thermostats requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for CY8C3665PVI-080 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 systems, emphasizing configurability, low-power operation, and system-level integration.

The CY8C36 family targets applications demanding both high-precision analog acquisition and flexible digital control - such as industrial IoT edge nodes, automotive comfort systems, and portable medical devices - through unified PSoC Creator™ design flow.

FAQ

Does CY8C3665PVI-080 support USB device enumeration without external crystal?

Yes. The device integrates a factory-trimmed internal oscillator capable of Full-Speed USB 2.0 (12 Mbps) operation without an external crystal, reducing BOM cost and board space. This oscillator meets USB suspend/resume timing requirements and supports automatic clock recovery during data transmission.

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

No. While all 62 GPIOs are routable to the analog subsystem, the delta-sigma ADC has a single sample-and-hold channel and supports sequential scanning across up to 24 analog inputs per conversion sequence. Simultaneous sampling requires external multiplexing or multiple PSoC devices.

What is the maximum operating frequency of the 8051 core under worst-case industrial temperature conditions?

The 8051 core operates up to 67 MHz across the full industrial temperature range (–40 °C to +85 °C) when powered by VDD ≥ 3.3 V and using the internal PLL driven by the IMO or external crystal. At 1.8 V supply, maximum frequency is derated to 48 MHz per electrical specifications.

Is CapSense® functionality supported on pins shared with USB or CAN functions?

No. Pins designated as USB_DP/DM or CAN_TX/RX are hardwired to their respective physical layer circuits and cannot be reassigned to CapSense® electrodes. CapSense® is supported only on general-purpose GPIOs (P0–P5) and SIO pins not reserved for dedicated peripheral functions.