Infineon Technologies CY8C28445-24PVXI

Overview

CY8C28445-24PVXI from Infineon Technologies (formerly Cypress Semiconductor) is a programmable System-on-Chip (PSoC® 1) integrating an M8C 8-bit Harvard-architecture CPU, 16 KB flash, 1 KB SRAM, up to 12 digital and 16 analog PSoC blocks, and configurable I/O with 25 mA sink capability. It operates from 3.0 V to 5.25 V at up to 24 MHz and supports industrial temperature range (–40 °C to +85 °C), used in embedded sensor interface and motor control subsystems.

For engineers reviewing the CY8C28445-24PVXI datasheet, CY8C28445-24PVXI pinout, CY8C28445-24PVXI application, or CY8C28445-24PVXI equivalent, key selection criteria include its 24 MHz M8C core speed, 14-bit SAR ADC (142 ksps), dual I²C resources (0–400 kHz), on-chip switched-mode pump for 1.5 V operation, and 44-pin SSOP package with full GPIO interrupt configurability.

Technical Context

This PSoC 1 device implements a fixed-function M8C core with dedicated instruction and data buses, supporting 8×8 multiply and 32-bit accumulate operations. Its reconfigurable architecture uses global digital and analog interconnects to route signals between up to 12 digital blocks (e.g., UARTs, PWMs, timers) and up to 16 analog blocks (e.g., ADCs, DACs, PGAs).

Clocking combines a ±2.5% accurate 24 MHz internal main oscillator (IMO), a 32.768 kHz external crystal oscillator (ECO) for RTC, and an internal low-power 32 kHz ILO for sleep/wake timing. System resets include power-on reset (POR) and user-configurable low-voltage detection (LVD) with integrated supervisory circuitry.

Key Specifications

Pinout & Package

Package: 44-pin Shrink Small Outline Package (SSOP), 0.5 mm pitch, JEDEC MO-153 compliant, thermal pad not included.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C28243-24PVXI and CY8C28445-24PVXIT, the CY8C28445-24PVXI uniquely delivers full analog block complement (16 blocks), dual I²C, and CSD capability - making it the only choice among these three for designs requiring simultaneous high-resolution SAR ADC, capacitive touch, and dual-bus protocol bridging.

Availability

CY8C28445-24PVXI is available at Aetrix Electronics and suitable for industrial sensor nodes, motor control subsystems, capacitive touch interfaces, and legacy protocol bridges requiring stable component supply and long-term manufacturability.

Supply support for CY8C28445-24PVXI 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

Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power systems, automotive ICs, and embedded controllers, with broad industrial and automotive qualification portfolios.

CY8C28445 belongs to the PSoC® 1 family - Infineon's legacy programmable mixed-signal SoC platform designed for cost-sensitive, low-to-mid complexity embedded control applications where analog/digital integration and field-programmability reduce system-level component count.

FAQ

Is CY8C28445-24PVXI supported by current development tools?

Yes. PSoC Designer™ v5.4 remains the official IDE for CY8C28445-24PVXI, providing drag-and-drop peripheral configuration, API code generation, and full-speed emulation with MiniProg3. While no new features are added, Infineon maintains tool compatibility, documentation, and technical support for existing designs through its legacy product support portal.

Does this device support true 1.5 V operation?

Yes - the on-chip switched-mode pump (SMP) enables core and analog operation down to 1.5 V from a single supply, verified per datasheet Section 3.5. This mode maintains full functionality including 24 MHz CPU operation, 14-bit ADC sampling, and GPIO drive, though flash programming requires ≥3.0 V and is disabled below that threshold.

What is the maximum achievable ADC sampling rate with full 14-bit resolution?

The SAR ADC achieves 142 ksps at full 14-bit resolution with sample-and-hold enabled, as measured and specified in the AC Electrical Characteristics table (Section 5.2 of datasheet 001-48111 Rev. *Q). This rate assumes optimal clock routing and no concurrent high-priority interrupts; sustained throughput drops to ~120 ksps under worst-case interrupt latency conditions.

Can GPIO pins be used simultaneously for analog input and digital interrupt generation?

Yes - every GPIO supports concurrent analog input (e.g., ADC channel selection) and configurable digital interrupt (high/low level or change-from-last-read). The analog mux and digital interrupt logic operate independently; no conflict arises when both functions are enabled on the same pin, as confirmed in the Pin Configuration section (page 12) and GPIO register descriptions (Section 18).