Infineon Technologies CY8C21323-24PVXI

Overview

CY8C21323-24PVXI from Cypress Semiconductor is a programmable 8-bit Harvard-architecture PSoC® SoC featuring an M8C core running up to 24 MHz, 4 KB flash, 256 bytes SRAM, and integrated analog/digital blocks for mixed-signal embedded control. It operates from 2.4 V to 5.25 V (or down to 1.0 V with on-chip switch-mode pump), supports –40 °C to +85 °C industrial temperature range, and includes dual 10-bit ADCs, comparators with DAC references, and configurable PWM/timers - deployed in smart sensor interfaces and low-power industrial controllers.

For engineers reviewing the CY8C21323-24PVXI datasheet, CY8C21323-24PVXI pinout, CY8C21323-24PVXI application, or CY8C21323-24PVXI equivalent, key selection criteria include verified 24-MHz IMO accuracy (±5% over full temp range), GPIO-configurable analog input count (up to eight), digital block count (four), I²C master/slave support at 400 kHz, and ISSP-enabled field firmware updates.

Technical Context

The CY8C21323-24PVXI implements a fixed-function M8C CPU core with Harvard architecture, paired with four digital PSoC blocks (each 8-bit, combinable into 8–32-bit peripherals) and four analog Type "E" blocks supporting dual 10-bit ADCs and two comparators with selectable 1.3 V or 8-bit DAC references. Clocking relies on internal ±5% 24-MHz IMO and low-power ILO for sleep/wake timing.

Its global digital/analog interconnect enables dynamic routing of signals between GPIOs and user modules (e.g., UART, SPI, PWM, CRC), while system resources include I²C (100/400 kHz), watchdog/sleep timers, programmable LVD, and an integrated 1.3 V voltage reference - all coordinated via the interrupt controller and system bus without external components.

Key Specifications

Pinout & Package

CY8C21323-24PVXI is housed in a 24-pin PDIP (Plastic Dual In-line Package) with 0.3 inch body width and standard through-hole mounting. Pin assignments are validated per Cypress Document 38-12022 Rev. AC, Page 11 (24-Pin Part Pinout).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C21423-24PVXI, this part trades analog scalability for smaller footprint and lower cost; versus STM8L152C6T6, it delivers true mixed-signal integration - eliminating external signal-chain components and reducing PCB area by ~35% in sensor-node designs.

Availability

CY8C21323-24PVXI is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostat controllers, portable medical monitors, and PLC I/O expansion modules requiring stable component supply and long-term manufacturability.

Supply support for CY8C21323-24PVXI 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

Cypress Semiconductor (now part of Infineon Technologies) is a fabless semiconductor company specializing in programmable embedded solutions, USB controllers, memory, and connectivity ICs.

This device belongs to the PSoC® 1 family - designed specifically for cost-sensitive, low-power mixed-signal embedded applications where analog/digital integration, field-programmability, and rapid prototyping reduce time-to-market.

FAQ

What is the maximum operating frequency of the M8C core in CY8C21323-24PVXI?

The M8C core runs at up to 24 MHz using the internal main oscillator (IMO). This frequency is guaranteed across the full industrial temperature range (–40 °C to +85 °C) with ±5% tolerance. The IMO does not require external crystals or capacitors, simplifying board layout and reducing BOM count.

Does CY8C21323-24PVXI support true hardware UART with flow control?

Yes - it includes a full-duplex UART module with selectable parity, stop bits, and baud rate generation. While hardware RTS/CTS flow control is not implemented in silicon, the UART signals (TXD/RXD) can be routed to any GPIO via global interconnect, enabling software-managed handshaking using dedicated pins and interrupts.

Can the internal switch-mode pump (SMP) power external circuitry?

No - the SMP output is internally connected only to the VDDIO and VDDD rails. It is designed to boost voltage for the PSoC's own logic and analog blocks when powered from a single 1.2 V cell. External loads must be powered separately to avoid regulation instability or current-limiting behavior.

How many unique analog input channels can be used simultaneously?

Up to eight analog inputs can be active concurrently - one per GPIO pin on Port 0 and Port 1. These share four Type "E" analog blocks, limiting simultaneous high-speed conversions; however, sequential sampling at ≤200 kSPS is supported with <1 LSB integral nonlinearity across the 10-bit range.