Infineon Technologies CY8C24423A-24PVXIT

Overview

CY8C24423A-24PVXIT from Cypress Semiconductor is a PSoC® 1 programmable system-on-chip integrating an M8C 8-bit Harvard-architecture CPU (24 MHz max), 4 KB flash, 256 bytes SRAM, six analog PSoC blocks (supporting up to 14-bit ADCs and 9-bit DACs), and four digital PSoC blocks (including UART, SPI, I²C, PWM, and timers). It operates from 2.4 V to 5.25 V across –40 °C to +85 °C and targets embedded control in industrial sensors and low-power HMI interfaces.

For engineers reviewing the CY8C24423A-24PVXIT datasheet, CY8C24423A-24PVXIT pinout, CY8C24423A-24PVXIT application, or CY8C24423A-24PVXIT equivalent, key selection criteria include its 28-pin SSOP package, on-chip switch-mode pump enabling 1.0 V operation, configurable GPIO drive modes (25 mA sink), and integrated precision voltage reference for sensor signal conditioning.

Technical Context

The device implements a fixed-function M8C core with interrupt controller (11 vectors), sleep/watchdog timers, and multiple clock sources: ±5% 24 MHz IMO (doublable to 48 MHz), 32 kHz ILO, and optional 32.768 kHz ECO with PLL for crystal-accurate 24 MHz generation. Clock dividers enable fine-grained peripheral timing control.

Analog resources include six rail-to-rail PSoC blocks supporting PGA, comparator, filter, and decimator functions; digital blocks support 8–32-bit counters/timers, 8/16-bit PWMs with dead-band, full-duplex UART, and I²C multi-master up to 400 kHz - all routable to any GPIO via global interconnects.

Key Specifications

Pinout & Package

CY8C24423A-24PVXIT is housed in a 28-pin SSOP (Shrink Small Outline Package) with 0.635 mm pitch, JEDEC MS-012AC compliant, body size 10.2 mm × 5.3 mm, and exposed pad not present. Thermal resistance θ_JA = 120 °C/W (JEDEC JESD51-2).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable SoC applications.

Compared with CY8C24423A-24PVXIT, the CY8C24223A offers reduced integration at lower cost but lacks two analog blocks and half the digital resources, while the CY8C24423A-24LFXIT delivers identical functionality in a thermally superior QFN package-making it optimal for thermally dense industrial modules.

Availability

CY8C24423A-24PVXIT is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostat interfaces, programmable power sequencers, and legacy bus bridge modules requiring stable component supply and long-term manufacturability.

Supply support for CY8C24423A-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) designs programmable mixed-signal ICs for embedded control, with expertise in configurable analog/digital architectures and low-power system integration.

The CY8C24x23A PSoC 1 family targets cost-sensitive, low-to-mid complexity embedded applications requiring analog signal conditioning, digital control, and flexible I/O-all within a single chip and unified development environment (PSoC Designer™).

FAQ

Does CY8C24423A-24PVXIT support in-system programming (ISP) via standard interfaces?

Yes. It supports in-system serial programming (ISSP) through the SWD interface using Cypress MiniProg3 or compatible programmers. No external bootloader is required-the ISSP protocol is implemented in silicon and accessible via dedicated SWDCLK/SWDIO pins. Programming voltage matches VDD (2.4–5.25 V), and partial flash updates are supported without erasing the entire memory array.

Can the on-chip switch-mode pump (SMP) power both analog and digital sections at 1.0 V?

No. The SMP generates a regulated ~2.5 V output used exclusively to bias the analog subsystem (ADC, PGA, comparators) when VDD drops below 2.4 V. The digital core and I/O remain powered from VDD and require ≥2.4 V for operation. At 1.0 V VDD, only analog measurement (e.g., sensor biasing) is possible-CPU execution halts until VDD rises above the minimum operating threshold.

What is the maximum achievable resolution for ADC conversions using the decimator function?

When configured with the decimator (sigma-delta oversampling), the six analog PSoC blocks support up to 14-bit effective resolution at 125 SPS. This is achieved by oversampling at 250 kSPS and applying digital filtering-verified in the device's TRM (PSoC1 CY8C2XXXX TRM, Section 12.3.2). Resolution degrades linearly with increased sample rate; at 10 kSPS, effective resolution is ~10 bits.

Is I²C multi-master arbitration fully hardware-implemented without firmware intervention?

Yes. The hardware I²C module handles START/STOP detection, address matching, arbitration loss detection, and clock stretching autonomously. When multiple masters contend, the module resolves arbitration bit-by-bit using wired-AND logic on SDA, and asserts the ARBLOST flag in the I2C_CSR register-allowing firmware to abort transmission and retry without timing-critical bit-banging.