Infineon Technologies CY8C26643-24PVI

Overview

CY8C26643-24PVI from Cypress Semiconductor is a programmable System-on-Chip (PSoC™) integrating an M8C 8-bit Harvard-architecture CPU, 16 KB Flash, 256 B SRAM, 12 configurable analog PSoC blocks (including ΔΣ ADC, DAC, PGA, filters), and 8 digital PSoC blocks (PWM, UART, SPI, timers). It operates at up to 24 MHz, supports 3.0–5.25 V supply, and targets embedded control with mixed-signal integration in industrial sensors and motor control interfaces.

For engineers reviewing the CY8C26643-24PVI datasheet, CY8C26643-24PVI pinout, CY8C26643-24PVI application, or CY8C26643-24PVI equivalent, key selection criteria include on-chip analog configurability, ISSP™ in-system programming capability, 24-pin SOIC package compatibility, and support for precision ΔΣ ADCs with up to 11-bit resolution in resource-constrained designs.

Technical Context

The CY8C26643-24PVI implements a fully static CMOS architecture with dual-clock domains: a high-speed system clock (up to 24 MHz from internal oscillator ±2.5%) and a low-power sleep/wake clock (32.768 kHz crystal option). Its analog subsystem uses switch-capacitor and continuous-time PSoC blocks, each independently configurable via PSoC Designer software without firmware coding.

Digital peripherals are implemented as hardware modules mapped to 8 digital PSoC blocks, supporting concurrent UART, SPI, and PWM generation with dead-band control. Memory includes 16 KB Flash (50,000 erase/write cycles) and 256 B SRAM, with EEPROM emulation up to 2,304 bytes enabled through firmware libraries.

Key Specifications

Pinout & Package

CY8C26643-24PVI is housed in a 24-pin Small Outline Integrated Circuit (SOIC) package with 300 mil body width, surface-mount compatible, and RoHS-compliant lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C26443-24PVI, CY8C26643-24PVI offers greater Flash headroom for feature-rich firmware; versus CY8C27443-24PVX, it trades modern architecture and longevity for legacy toolchain compatibility and lower unit cost in maintenance projects.

Availability

CY8C26643-24PVI is available at Aetrix Electronics and suitable for industrial sensor interface, motor control feedback, and smart HVAC actuator applications requiring stable component supply across long-lifecycle embedded programs.

Supply support for CY8C26643-24PVI 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) is a fabless semiconductor company specializing in programmable embedded solutions, USB controllers, and memory products.

CY8C26xxx belongs to the PSoC 1 family-designed specifically to replace discrete analog/digital components with a single, software-configurable mixed-signal SoC for cost-sensitive, medium-complexity industrial and consumer control applications.

FAQ

Is CY8C26643-24PVI still recommended for new designs?

No. Cypress explicitly marks CY8C26643-24PVI as "Not Recommended for New Designs" in its official datasheet (Rev. *C, May 2005), advising migration to the CY8C27xxx series. However, it remains supported for legacy design refresh, repair, and long-term industrial maintenance where PSoC 1 toolchain compatibility is required.

What development tools are required to program CY8C26643-24PVI?

PSoC Designer 5.x is the official IDE for CY8C26643-24PVI, providing graphical peripheral configuration, automatic code generation, and ISSP™ programming support. Required hardware includes a MiniProg1 or MiniProg3 programmer; no JTAG adapter is needed due to native SWD-based ISSP™ interface.

Does CY8C26643-24PVI support true hardware UART with FIFO?

No. The CY8C26643-24PVI implements UART functionality in firmware using digital PSoC blocks and CPU resources-it lacks dedicated UART hardware with FIFO buffers. Throughput is limited to ~115.2 kbps at 24 MHz, and reliable operation requires careful interrupt latency management and buffer sizing in application code.

Can the analog PSoC blocks operate simultaneously with independent clock sources?

Yes. Each analog PSoC block can be assigned its own clock source (e.g., internal modulator clock, system clock, or derived clocks) via the Analog Clock Select Register. This enables concurrent operation of ΔΣ ADC, DAC, and filter blocks at different sampling rates without CPU intervention or timing conflict.