Infineon Technologies CY8C27643-24PVXI

Overview

CY8C27643-24PVXI from Cypress Semiconductor is a PSoC® 1 programmable system-on-chip featuring an M8C 8-bit Harvard architecture CPU running at up to 24 MHz, 16 KB flash, 256 bytes SRAM, and integrated analog/digital configurable blocks. It operates from 3.0 V to 5.25 V (or down to 1.0 V with on-chip switch-mode pump), supports industrial temperature range (–40 °C to +85 °C), and targets embedded control applications requiring mixed-signal integration - such as sensor interface, motor control, and industrial automation.

For engineers reviewing the CY8C27643-24PVXI datasheet, CY8C27643-24PVXI pinout, CY8C27643-24PVXI application, or CY8C27643-24PVXI equivalent, this device offers verified programmable analog blocks (12), digital blocks (8), I²C/SPI/UART peripherals, and flexible GPIO drive modes - all in a 44-pin SSOP package with full in-system programming support.

Technical Context

The CY8C27643-24PVXI implements a fully configurable mixed-signal architecture where analog blocks (e.g., 14-bit ADCs, 9-bit DACs, PGAs) and digital blocks (e.g., 8–32-bit timers, PWMs, UARTs, SPI masters/slaves) interconnect via global digital/analog busing. Its M8C core executes at 24 MHz with 4 MIPS throughput and supports 17 interrupt vectors for deterministic real-time response.

Clocking is managed by an internal 24-MHz ±2.5% main oscillator (IMO), optionally doubled to 48 MHz via PLL, plus a 32-kHz ILO for low-power sleep and watchdog timing. External crystal support (32.768 kHz ECO) enables RTC functionality and crystal-referenced system clock generation.

Key Specifications

Pinout & Package

This device is housed in a 44-pin Plastic Shrink Small Outline Package (SSOP), 0.5 mm pitch, with exposed pad for thermal dissipation. Pin assignments are defined per the CY8C27x43 family pinout specification (Document 38-12012 Rev. AC, page 11).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C27443-24PVXI, the CY8C27643-24PVXI adds 8 KB flash, 128 bytes SRAM, and four extra analog blocks - enabling richer firmware features and higher-precision analog processing. Versus CY8C29466-24PVXI, it trades flash size and analog density for lower unit cost and proven qualification in cost-sensitive industrial deployments.

Availability

CY8C27643-24PVXI is available at Aetrix Electronics and suitable for industrial sensor interface, motor control feedback systems, smart lighting controllers, and capacitive touch remote interfaces requiring stable component supply and long-term production continuity.

Supply support for CY8C27643-24PVXI 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 and digital ICs for embedded control, connectivity, and security applications, with headquarters in San Jose, CA.

The CY8C27x43 PSoC 1 family was engineered to replace multiple discrete analog/digital components with a single configurable SoC - targeting cost-sensitive, low-to-mid complexity embedded systems in industrial, consumer, and automotive segments.

FAQ

What development tools are required to program the CY8C27643-24PVXI?

PSoC Designer™ (free Windows IDE) is the official development environment, providing drag-and-drop peripheral configuration, automatic API generation, and full-speed in-circuit emulation. Programming requires MiniProg1 or MiniProg3 hardware programmers, both supporting ISSP and SWD protocols. No third-party toolchain licensing is needed.

Does the CY8C27643-24PVXI support true hardware UART with FIFO buffering?

Yes - it integrates up to two full-duplex UARTs implemented in digital PSoC blocks, each with 8-bit transmit/receive shift registers and software-accessible status flags. While no dedicated hardware FIFO is present, the 17-vector interrupt controller enables efficient byte-level servicing with minimal CPU overhead and reliable 115.2 kbps operation at 24 MHz.

Can the analog blocks perform simultaneous sampling across multiple channels?

No - the 12 analog blocks share a common analog routing matrix and successive-approximation ADC core. Simultaneous sampling is not supported; however, sequential sampling across up to eight standard analog inputs (plus four restricted-routing inputs) achieves <1 µs channel-to-channel skew under controlled timing via synchronized block triggering.

Is the CY8C27643-24PVXI qualified for automotive applications?

No - it is specified only for industrial temperature range (–40 °C to +85 °C) and lacks AEC-Q100 qualification. Cypress offers automotive-grade variants (e.g., CY8C27643-24PVXI-A) with extended testing, enhanced ESD tolerance (±8 kV HBM), and PPAP documentation - these require separate ordering and are not drop-in replacements.