Infineon Technologies CY8C27643-24PVXIT

Overview

CY8C27643-24PVXIT 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 modules and motor control subsystems.

For engineers reviewing the CY8C27643-24PVXIT datasheet, CY8C27643-24PVXIT pinout, CY8C27643-24PVXIT application, or CY8C27643-24PVXIT equivalent, key selection criteria include verified 24 MHz operation, 12 analog PSoC blocks (supporting up to 14-bit ADCs and 9-bit DACs), 8 digital PSoC blocks (including dual UARTs and SPI), flexible GPIO drive modes (25 mA sink), and EEPROM emulation in flash.

Technical Context

The CY8C27643-24PVXIT implements a fully configurable mixed-signal architecture where analog and digital resources are routed via global interconnects. Its M8C core executes instructions at up to 24 MHz with 8×8 multiply and 32-bit accumulate capability, while internal clock sources include a ±2.5% 24-MHz IMO (doublable to 48 MHz) and optional 32.768-kHz ECO for RTC or PLL-based precision timing.

Analog functionality is delivered through twelve rail-to-rail PSoC blocks supporting ADCs (up to 14-bit resolution), DACs (up to 9-bit), PGAs, filters, and comparators. Digital peripherals include eight user-configurable blocks enabling timers/counters (8–32 bit), PWMs (8/16-bit with dead-band), dual full-duplex UARTs, multiple SPI masters/slaves, I²C (slave/master/multi-master), CRC, and PRS generators - all connectable to any GPIO.

Key Specifications

Pinout & Package

Package: 44-pin QFP (VXIT suffix denotes 44-lead TQFP, 10 mm × 10 mm, 0.8 mm pitch).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C27443-24PVXI, CY8C27643-24PVXIT provides 100% more flash and SRAM for complex firmware and data logging; versus CY8C29466-24PVXI, it trades memory headroom for lower unit cost and smaller footprint - ideal for volume production of mid-complexity embedded controllers.

Availability

CY8C27643-24PVXIT is available at Aetrix Electronics and suitable for industrial sensor nodes, motor control subsystems, capacitive touch interfaces, and programmable power sequencers requiring stable component supply and long-term manufacturing continuity.

Supply support for CY8C27643-24PVXIT 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, connectivity, and memory technologies for industrial, automotive, and consumer markets.

The CY8C27xxx PSoC 1 family was designed to replace discrete analog/digital components with a single configurable chip for cost-sensitive, low-to-mid complexity embedded control - emphasizing rapid prototyping, analog flexibility, and field-upgradable firmware.

FAQ

Does CY8C27643-24PVXIT support USB communication?

No, CY8C27643-24PVXIT does not include native USB transceivers or PHY. It supports UART, SPI, and I²C for host communication. For USB connectivity, external bridge ICs (e.g., CP2102 or FT232RL) must be used with its UART interface. PSoC 1 devices lack USB hardware; USB capability begins with PSoC 3 and later generations.

What is the maximum ADC sampling rate achievable with CY8C27643-24PVXIT?

The SAR-based ADC achieves up to 192 kSPS at 10-bit resolution when using the internal 24-MHz clock and optimized configuration. At full 14-bit resolution, the practical maximum is 12 kSPS due to conversion time constraints. Performance depends on reference selection, input impedance, and sample-and-hold setup time as specified in the Electrical Characteristics table (page 20 of Rev. AC datasheet).

Can CY8C27643-24PVXIT operate reliably at 1.8 V supply?

No - the absolute minimum operating voltage is 3.0 V for standard operation. However, with the on-chip switch-mode pump (SMP) enabled, the device can function down to 1.0 V on VDD, but only in specific low-power modes (e.g., sleep with ILO clock). At 1.8 V, SMP is inactive and the device will not initialize or execute code reliably per DC Electrical Characteristics (Table 1, page 20).

Is there hardware support for floating-point arithmetic in the M8C core?

No, the M8C core lacks dedicated floating-point units or instructions. All floating-point operations must be implemented in software using ANSI C libraries or fixed-point approximations. The 8×8 multiply with 32-bit accumulate instruction accelerates fixed-point math, but IEEE-754 floating-point requires runtime library overhead and consumes significant flash/SRAM resources.