CY8C24423A-24PXI - 24MHz PSoC 1 8-Bit MCU | Infineon
MPN: CY8C24423A-24PXI ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.1612 | $0.16 |
| 10 | $0.1612 | $1.61 |
| 100 | $0.1612 | $16.12 |
| 500 | $0.1612 | $80.60 |
| 1,000 | $0.1612 | $161.20 |
CY8C24423A-24PXI Overview
A microcontroller is a programmable integrated circuit that executes firmware, reads inputs, controls outputs, and coordinates embedded-system functions. The PSoC 1 family combines a microcontroller core with configurable digital and analog peripherals, allowing a design to tailor functions such as timers, serial communication, counters, and analog signal conditioning. This makes the device more versatile than a fixed-function logic controller while retaining a simple 8-bit embedded architecture.
Key verified features include a 24 MHz maximum frequency, 4 KB flash organized as 4K x 8, and 256 bytes of SRAM. The 28-pin PDIP format is suited to through-hole prototyping, legacy industrial equipment, and designs that require easy inspection or manual assembly. The verified Mouser result specifically identifies the part as an MCU with 4 KB flash and 256 bytes of SRAM, while DigiKey identifies the M8C architecture and 28-pin package.
The PSoC architecture can support embedded products requiring both digital control and analog or communication functions without relying on a large external component count. The verified distributor listing refers to the CY8C2442 I2C/SPI configuration, so the intended I2C or SPI requirement should be preserved when reviewing any substitution. Firmware, peripheral configuration, pin assignment, and timing behavior must also be checked before changing the MCU.
Typical design uses include industrial control, sensor-interface equipment, small automation controllers, communication modules, and legacy embedded products. The 24 MHz clock provides processing headroom for control loops and peripheral services, while 4 KB flash limits firmware capacity to compact applications. The 256-byte SRAM is suitable for modest working memory, but developers should avoid relying on it for large buffers or complex protocol stacks.
The most important design consideration is package and firmware compatibility. CY8C24423A-24PXI uses a 28-pin PDIP package, and the PSoC 1 device configuration affects pin multiplexing, clocking, interrupts, and peripheral behavior. Review the manufacturer datasheet for the exact pin assignments, electrical limits, programming procedure, and application-specific peripheral settings before production release. This page combines verified distributor specifications, sourcing information, and design guidance rather than inferring unprovided electrical details.
Drop-in alternatives for CY8C24423A-24PXI — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with CY8C24423A-24PXI (same form factor and footprint) — differing in Package, Product Type, Flash Memory, Mounting Type, Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
CY8C24423A-24PVXI
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C24423A-24PXI Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit PSoC 1 mixed-signal microcontroller |
| Core Architecture | M8C |
| Maximum Operating Frequency | 24 MHz |
| Flash Memory | 4 KB (4K x 8) |
| SRAM | 256 bytes |
| Package | 28-pin PDIP |
| Mounting Type | Through-hole |
| Series | PSoC 1 CY8C24xxx |
| Communication Interface | I2C/SPI configuration referenced in distributor data |
| Programmable Architecture | PSoC mixed-signal array |
| RoHS Status | unknown |
| REACH Status | unknown |
| Lead-Free Status | unknown |
| AEC-Q100 Qualification | not_applicable |
CY8C24423A-24PXI 28-pin pdip Pin Configuration Guide
Pin configuration for CY8C24423A-24PXI (28-pin pdip package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for CY8C24423A-24PXI.
Refer to the datasheet for full pin configuration.
Typical Applications
CY8C24423A-24PXI is suitable for 6 applications: Industrial Control, Sensor Interface Equipment, Small Automation Controllers, Communication Modules, Legacy Embedded Products, Mixed-Signal Control Boards.
Industrial Control
The CY8C24423A-24PXI fits compact industrial-control prototypes that need programmable sequencing, digital I/O, and serial peripheral support in an easily inspected through-hole package. Its 24 MHz M8C core provides processing headroom for control routines, while 4 KB of flash constrains firmware to a focused application rather than a large embedded stack. The 28-pin PDIP format is useful when technicians need to assemble or troubleshoot the controller on a prototype board. Before production, verify supply voltage, temperature range, pin multiplexing, and long-term sourcing in the manufacturer documentation.
Recommended
Sensor Interface Equipment
The PSoC 1 architecture makes CY8C24423A-24PXI relevant for sensor-interface equipment where a controller must read inputs, process measurements, and coordinate outputs. The 256-byte SRAM is adequate for compact state machines and short data buffers, while the 24 MHz core can support time-sensitive service routines. I2C/SPI-oriented functionality should be matched to the intended system interface and verified against the exact pin configuration. The part is best suited to modest embedded control nodes, not high-volume data logging systems that require extensive memory.
Recommended
Small Automation Controllers
For a small automation controller, CY8C24423A-24PXI can combine a firmware-driven state machine with configurable PSoC peripherals and serial communication. Its 24 MHz operating speed supports responsive control tasks, while 4 KB of flash favors compact, purpose-built firmware. The PDIP package simplifies through-hole prototypes and repairable controller boards, although it consumes more board area than a surface-mount MCU. Validate actuator drive levels, isolation, watchdog behavior, and environmental requirements separately because those details were not included in the verified web data.
Recommended
Communication Modules
CY8C24423A-24PXI is a reasonable candidate for compact communication modules that require an embedded controller alongside I2C or SPI-connected peripherals. The verified distributor data associates the CY8C2442 family with I2C/SPI configurations, so the intended protocol and pin multiplexing should be locked before layout. The 4 KB flash and 256-byte SRAM favor lightweight supervisory or protocol-control functions rather than high-bandwidth networking. Firmware timing, bus pull-ups, interrupt handling, and clock requirements should be verified against the datasheet and reference designs.
Recommended
Legacy Embedded Products
The 28-pin PDIP package and PSoC 1 mixed-signal architecture can make CY8C24423A-24PXI useful in legacy embedded-product revisions where a through-hole controller is required. It allows a manufacturer to retain familiar assembly and inspection practices while combining digital control with configurable analog and communication resources. The 24 MHz clock and 4 KB flash are suitable for compact control functions, but memory limitations may affect feature expansion. A lifecycle review is essential because the supplied sources do not establish the current production status or long-term availability.
Recommended
Mixed-Signal Control Boards
The PSoC 1 mixed-signal approach can simplify boards that combine digital sequencing with basic analog functions, provided the selected PSoC configuration includes the required resources. CY8C24423A-24PXI offers a 24 MHz M8C core, 4 KB flash, and 256-byte SRAM for compact supervisory logic. Designers should confirm ADC, DAC, comparator, timer, and interrupt requirements directly in the device documentation because those specifications were not supplied in the verified snippets. Keep analog layout and firmware configuration aligned with the manufacturer reference material.
Recommended
Recommended Products Summary
Engineering reference data for CY8C24423A-24PXI — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CY8C24423A-24PVXI |
|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies |
| Flash Memory | 4 KB (4K x 8) | 4.0 kByte |
| SRAM | 256 bytes | 0.25 kByte |
Key Differentiators
- Verified 28-pin PDIP package (vs CY8C24423A-24PVXI)
- Confirmed target memory configuration (vs CY8C24423A-24PVXI)
- Known 24 MHz operating point (vs CY8C24423A-24PVXI)
- I2C/SPI-oriented family identification (vs CY8C24423A-24PVXI)
Design Notes
Treat the CY8C24423A-24PXI as a 28-pin through-hole device and preserve the verified PDIP footprint in the mechanical design. Do not substitute a surface-mount orderable code solely because the flash and SRAM figures are similar. Verify pin numbering, pin multiplexing, and peripheral assignments against the manufacturer datasheet before routing I2C, SPI, control outputs, and supply pins. The supplied data does not include the complete pinout, so the PCB should not be released from distributor summaries alone.
The verified data does not provide the target's supply-voltage range, so power rails must be selected only after checking the manufacturer datasheet and application requirements. Do not assume that the 3.0 V to 5.25 V value shown for CY8C24423A-24PVXI applies to the PXI device. Include adequate decoupling and verify startup, reset, brownout, and I/O-level requirements against the exact ordering code. Estimated power calculations cannot be produced responsibly without the missing operating conditions.
PSoC peripherals can change pin assignments according to the selected configuration, so firmware and PCB decisions must be made together. Lock the required I2C/SPI resources, timing inputs, interrupts, and analog functions before final routing. Keep communication traces short where bus integrity matters, follow the manufacturer’s external-component recommendations, and provide test points for programming and debug. Because detailed electrical and pin data were not supplied in the verified snippets, final layout review must use the manufacturer documentation.
A matching flash size is not evidence that an alternate MCU is drop-in compatible. The verified data does not establish a pin-compatible replacement for CY8C24423A-24PXI, and the PVXI suffix is not enough to prove equivalence. Review package type, pinout, supply voltage, clock, SRAM, flash organization, peripherals, interrupt behavior, programming toolchain, and firmware dependencies. For a legacy product, also verify current lifecycle status and obtain manufacturer sourcing confirmation before redesigning around an alternative.
Compliance Information
The supplied verified data does not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. No compliance certification was inferred.