Infineon Technologies CY8C22545-24AXI

Overview

CY8C22545-24AXI from Cypress Semiconductor is a programmable PSoC® 1 System-on-Chip featuring an M8C 8-bit Harvard-architecture CPU running at up to 24 MHz, 16 KB flash, 1 KB SRAM, and integrated analog/digital reconfigurable blocks-including six analog (E-type) and eight digital PSoC blocks-for mixed-signal embedded control in industrial HMI and sensor interface applications.

For engineers reviewing the CY8C22545-24AXI datasheet, CY8C22545-24AXI pinout, CY8C22545-24AXI application, or CY8C22545-24AXI equivalent, key selection criteria include its 10-bit SAR ADC (200 ksps, ±2.5 LSB INL), CapSense®-optimized dual CSD channels with dedicated 16-bit timers, 24 MHz IMO with ±5% tolerance over –40 °C to +85 °C, and 44-pin TQFP package with 38 configurable analog-capable GPIOs.

Technical Context

The CY8C22545-24AXI implements a fixed-function M8C core with interrupt-driven real-time execution, supported by a global interconnect fabric linking digital blocks (timers, PWMs, UART, SPI, I²C) and analog resources (comparators, 10-bit SAR ADC, CT-E/SC-E blocks). Its clock system integrates an internal 24 MHz IMO (±5% over industrial temp), optional 32.768 kHz ECO with PLL for crystal-accurate timing, and independent CSD_CLK/CNT_CLK domains for synchronized CapSense scanning.

Analog signal processing is enabled via six reconfigurable analog blocks supporting dual 8-bit ADCs or up to four comparators, while digital peripherals leverage eight 8-bit blocks combinable into 8–32-bit functions-e.g., PWM with deadband, CRC generators, or full-duplex UART-with routing flexibility across all GPIO pins.

Key Specifications

Pinout & Package

Package: 44-pin TQFP (7 mm × 7 mm, 0.8 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C22545-24AXI, the -24LFXI offers identical functionality in a RoHS-compliant LQFP, while the CY8C21345-24AXI reduces flash, memory, and block count - making it viable for lower-complexity designs but unsuitable for dual-channel CapSense or 38-GPIO systems.

Availability

CY8C22545-24AXI is available at Aetrix Electronics and suitable for industrial HMI panels, smart sensor nodes, motor control feedback systems, and medical diagnostic devices requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY8C22545-24AXI 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, memory, and connectivity ICs for industrial, automotive, and consumer markets.

The CY8C22545 belongs to the PSoC® 1 family - designed specifically for cost-sensitive, low-power mixed-signal applications where analog/digital peripheral customization replaces discrete component stacks in embedded control systems.

FAQ

What is the maximum ADC sampling rate and accuracy specification for CY8C22545-24AXI?

The device features a 10-bit SAR ADC capable of 200 ksps sampling. At VDD ≥3.0 V and Vref ≥3.0 V, it achieves ±2.5 LSB integral nonlinearity (INL) and ±1.5 LSB differential nonlinearity (DNL). External anti-aliasing filters are required on analog inputs to meet these specifications under real-world signal conditions.

Does CY8C22545-24AXI support crystal-based precise timing for RTC applications?

Yes - it includes an external crystal oscillator (ECO) input supporting a 32.768 kHz crystal. This can feed a real-time clock (RTC) block directly or drive a PLL to generate a crystal-accurate 24 MHz system clock. The ECO path is independent of the internal main oscillator (IMO), enabling simultaneous high-accuracy timekeeping and high-speed CPU operation.

How many GPIO pins support analog input functionality on CY8C22545-24AXI?

Up to 38 GPIO pins (across Ports 0–4) are configurable as analog inputs. These pins connect directly to the analog multiplexer and 10-bit SAR ADC, and also support CapSense® electrode connections. Each pin retains full digital I/O capability and interrupt generation, allowing dynamic mode switching during runtime.

Is in-system programming supported, and what interface is used?

Yes - CY8C22545-24AXI supports in-system serial programming (ISSP) via a two-wire interface using SWDCK and SWDIO pins. This allows full flash programming, verification, and debugging without removing the device from the PCB. No external voltage programming is needed; ISSP operates within the normal 3.0–5.25 V supply range.