Infineon Technologies CY8C21223-24SXIT

Overview

CY8C21223-24SXIT from Cypress Semiconductor is a programmable 8-bit Harvard-architecture PSoC® SoC featuring an M8C core running at up to 24 MHz, 4 KB flash, 256 bytes SRAM, and integrated analog/digital blocks including dual 10-bit ADCs, comparators with DAC references, and configurable PWM/timers - deployed in industrial sensor interfaces and low-power embedded control.

For engineers reviewing the CY8C21223-24SXIT datasheet, CY8C21223-24SXIT pinout, CY8C21223-24SXIT application, or CY8C21223-24SXIT equivalent, key selection criteria include operating voltage range (2.4–5.25 V), GPIO drive strength (25 mA sink/10 mA source), analog input count (up to eight), I²C/SPI/UART peripheral support, and industrial temperature rating (–40 °C to +85 °C).

Technical Context

The CY8C21223-24SXIT implements a fully configurable mixed-signal architecture with four digital PSoC blocks (supporting 8–32-bit timers, PWMs, CRC, and PRS) and four analog Type "E" blocks (providing two comparators with 1.3 V or 8-bit DAC reference and single/dual 10-bit 8-to-1 ADC). Its M8C CPU executes at up to 24 MHz with ±5% internal oscillator tolerance.

System-level resources include an on-chip switch-mode pump (SMP) enabling operation down to 1.0 V, programmable low-voltage detection (LVD), I²C master/slave/multi-master up to 400 kHz, full-duplex UART, and flexible GPIO configuration (pull-up/pull-down/high-Z/strong/open-drain) with interrupt capability on all pins.

Key Specifications

Pinout & Package

Package: 24-pin SOIC (SOIC-24, body width 7.5 mm, JEDEC MS-013AC).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C21223-24LTXIT, the SOIC variant offers easier hand-soldering and higher thermal mass; versus CY8C21323-24SXIT, it trades memory capacity for cost and footprint efficiency in resource-constrained designs.

Availability

CY8C21223-24SXIT is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostat controllers, portable medical monitors, and automated test fixtures requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY8C21223-24SXIT 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 ICs for embedded control, offering PSoC architecture since 2002 with focus on flexibility and system integration.

The CY8C21x23 product line targets cost-sensitive, low-power industrial and consumer applications requiring analog sensing, digital control, and firmware-defined peripherals in compact packages.

FAQ

Does CY8C21223-24SXIT support USB connectivity?

No. The CY8C21223-24SXIT does not include a USB physical layer or dedicated USB controller. It supports UART, SPI, and I²C for host communication. For USB functionality, designers must add an external USB-to-UART bridge IC or select a later-generation PSoC with native USB support (e.g., CY8C4xx series).

Can the internal 24-MHz oscillator meet timing-critical UART baud rates?

Yes. With ±5% tolerance, the internal main oscillator supports standard UART baud rates (e.g., 9600, 19200, 38400) within acceptable error margins (<2%). For higher precision (e.g., 115200), use external crystal or calibrate IMO against a known reference during startup.

What is the maximum sampling rate achievable with the 10-bit ADC?

The dual 10-bit 8-to-1 ADC achieves up to 100 kSPS in single-channel mode. In dual-channel interleaved mode, effective throughput drops to ~50 kSPS per channel due to shared conversion resources and pipeline overhead.

Is partial flash update supported in-field without full chip erase?

Yes. The device supports in-system serial programming (ISSP) with sector-level erase granularity. Firmware updates can overwrite specific flash pages (512-byte sectors) without erasing the entire 4 KB array, preserving calibration constants and configuration data stored elsewhere.