CY8C26443-24SXI - 24MHz 8-Bit PSOC 1 MCU | Infineon
MPN: CY8C26443-24SXI ✓ ActiveCY8C26443-24SXI Overview
A microcontroller is an integrated circuit that combines a processor core, program memory, data memory, peripherals, and I/O in one package. The PSOC 1 family extends the conventional MCU concept with configurable analog and digital resources, allowing a design to use resources according to the application rather than relying only on fixed peripheral functions. This makes the CY8C26443-24SXI useful for compact embedded systems that need control logic, communication, timing, or mixed-signal measurement functions.
Verified distributor information identifies the target as an M8C PSOC 1 CY8C26xxx microcontroller with an 8-bit architecture, 24 MHz clock, 16 KB Flash organized as 16K x 8, and a 28-SOIC package. The 28-pin surface-mount format supports compact PCB layouts while exposing the device's external connections through the SOIC footprint. The product is also identified under the legacy Cypress Semiconductor name in cross-reference and distributor records, reflecting the transition of the PSoC product line to Infineon Technologies.
The 24 MHz maximum clock and 16 KB Flash footprint make this MCU appropriate for control loops, keypad and display interfaces, simple protocol handling, embedded timers, and applications requiring mixed-signal peripheral integration. Engineers should confirm the required timer, ADC, communication, memory, and I/O resources against the device datasheet before finalizing a design, because the supplied verified results do not include the complete peripheral inventory or electrical timing tables. This page synthesizes the confirmed distributor specifications, package details, sourcing information, and practical replacement considerations rather than inventing unverified parameters.
The principal design consideration is PCB footprint and pin-function compatibility when replacing an existing CY8C26443-24SXI. The 28-SOIC package is not interchangeable with a different package, even if another CY8C26xxx or CY8C27xxx device offers similar CPU performance. Confirm programming compatibility, peripheral mapping, power behavior, and package pinout against the manufacturer documentation before production substitution. For new designs, the 24 MHz clock and 16 KB Flash provide a clear baseline for compact embedded-control product selection.
This product page consolidates real distributor availability references, the confirmed 8-bit and 24 MHz identity, the 16 KB Flash configuration, the 28-SOIC mechanical format, and drop-in candidates identified from supplied web cross-reference results. It also distinguishes confirmed facts from fields requiring datasheet verification, helping engineers move from part identification to sourcing and design review with fewer assumptions.
Drop-in alternatives for CY8C26443-24SXI — 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 CY8C26443-24SXI (same form factor and footprint) — differing in Product Type, Package, Flash Memory.
CY8C26443-24SXIT
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C26443-24SI
✅ Drop-InContact for price
View Datasheet →CY8C26443-24PI
✅ Drop-InContact for price
View Datasheet →CY8C27443-24SXI
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C27443-24SI
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C27443-24SXIT
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C26443-24SXI Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit M8C PSOC 1 CY8C26xxx microcontroller |
| Maximum Operating Frequency | 24 MHz |
| Flash Memory | 16 KB (16K x 8) |
| Processor Architecture | 8-bit |
| Core | M8C |
| Product Family | PSOC 1 |
| Device Subfamily | CY8C26xxx |
| Package | 28-SOIC |
| Pin Count | 28 pins |
| Mounting Type | Surface mount |
CY8C26443-24SXI 28-soic Pin Configuration Guide
Pin configuration for CY8C26443-24SXI (28-soic 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 CY8C26443-24SXI.
Refer to the datasheet for full pin configuration.
Typical Applications
CY8C26443-24SXI is suitable for 6 applications: Compact Embedded Control, Sensor Interface and Conditioning, Industrial Control Panel, Consumer Appliance Controller, Battery-Powered Monitoring Device, Communication Interface Module.
Compact Embedded Control
The CY8C26443-24SXI fits compact embedded-control products requiring an 8-bit processor with more timing headroom than basic low-speed controllers. Its confirmed 24 MHz operating frequency supports responsive task execution, event handling, timer updates, and control logic within a 28-SOIC surface-mount footprint. The 16 KB Flash provides space for application code and boot or configuration routines on the same die. Designers can place the MCU between sensor or switch inputs and actuator outputs, using the M8C platform for deterministic control without a separate processor. Before schematic release, confirm the required RAM, I/O count, timer channels, and analog resources against the manufacturer datasheet because those details were not included in the verified excerpts.
Recommended
Sensor Interface and Conditioning
The CY8C26443-24SXI is applicable to sensor-interface modules because the PSOC 1 family combines an embedded controller with configurable mixed-signal resources. The confirmed 24 MHz clock gives the controller sufficient execution speed to acquire measurements, apply filtering, perform threshold decisions, and update an operator interface or communications link. The device can serve as the central controller for resistive, capacitive, or digital sensors when its documented analog resources match the design. A 28-SOIC package also supports compact sensor boards, although engineers must verify ADC resolution, input count, reference voltage, and available analog routing in the CY8C26443 documentation before assigning the analog inputs.
Recommended
Industrial Control Panel
The CY8C26443-24SXI can serve as the controller in a small industrial control panel that scans inputs, drives indicators, manages pushbuttons, and executes deterministic machine-control logic. Its confirmed 24 MHz M8C processor provides useful throughput for multitasking control code, while 16 KB of Flash accommodates a dedicated application program. The 28-SOIC package is practical for automated assembly and compact controller boards. For industrial deployment, the engineer must verify operating-temperature limits, supply tolerance, ESD performance, watchdog behavior, and any qualification requirements directly from the datasheet; the supplied distributor information confirms the core identity but does not establish environmental ratings.
Recommended
Consumer Appliance Controller
The CY8C26443-24SXI is suitable for cost-sensitive appliance and equipment controllers where a local 8-bit processor must coordinate user inputs, displays, relays, and internal sensors. At 24 MHz, the MCU can service multiple periodic tasks and state-machine logic while its 16 KB Flash holds the control application. The 28-SOIC package reduces board area and supports automated production. A typical implementation might use GPIO for buttons and status LEDs, a timer for debounce or motor timing, and serial communication for a display or accessory module. Exact peripheral availability and pin multiplexing should be checked against the datasheet before selecting this MCU for a new platform.
Recommended
Battery-Powered Monitoring Device
The CY8C26443-24SXI can be evaluated for a battery-powered monitoring device that periodically reads a sensor, checks thresholds, records an event, and reports through a low-rate serial interface. The PSOC 1 mixed-signal architecture may reduce the need for separate analog and digital components, while the 24 MHz M8C core provides enough instruction throughput for protocol and control tasks. Low-power suitability must be assessed using the datasheet's sleep modes, active current, and peripheral shutdown behavior, none of which are available in the supplied excerpts. Firmware should use the documented low-power mechanisms rather than assuming the 24 MHz clock can be stopped without affecting peripherals.
Recommended
Communication Interface Module
The CY8C26443-24SXI can function as the host processor in a dedicated communications adapter, using its 24 MHz 8-bit core for framing, buffering, protocol conversion, and configuration handling. The 16 KB Flash supports embedded firmware while the 28-SOIC package keeps the adapter compact. Depending on the selected PSOC 1 peripherals, it may connect through UART, SPI, or another documented interface, but those interface configurations must be verified in the manufacturer documentation. Engineers should also check whether the required baud rate, timer resources, and pin multiplexing are available simultaneously. This application favors the M8C ecosystem where simple protocol handling is sufficient and a higher-performance MCU would add unnecessary cost or complexity.
Recommended
Recommended Products Summary
Engineering reference data for CY8C26443-24SXI — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CY8C26443-24SXIT | CY8C26443-24SI | CY8C27443-24SXI | CY8C27443-24SI |
|---|---|---|---|---|---|
| Package | 28-SOIC | 28-SOIC | 28-SOIC | 28-SOIC | 28-SOIC |
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Maximum Operating Frequency | 24 MHz | 24 MHz | 24 MHz | 24 MHz | 24 MHz |
| Processor Architecture | 8-bit | 8-bit | 8-bit | 8-bit | 8-bit |
| Core | M8C | M8C | M8C | M8C | M8C |
| Device Family | CY8C26443 / CY8C26xxx | CY8C26443 / CY8C26xxx | CY8C26443 / CY8C26xxx | CY8C27443 | CY8C27443 |
Key Differentiators
- Direct same-family ordering alternatives (vs CY8C26443-24SXIT)
- Close same-family source option (vs CY8C26443-24SI)
- Related platform with broader resource implications (vs CY8C27443-24SXI)
- Compact programmable mixed-signal integration (vs ATMEGA328P-MNR)
Design Notes
Reserve the 28-SOIC footprint exactly as defined in the CY8C26443 package drawing and preserve the manufacturer-recommended copper, solder-mask, and paste geometry. Because the supplied excerpts confirm the package family but do not provide pin dimensions or land patterns, do not scale a generic SOIC footprint into production without checking the official drawing. Confirm land-pattern compatibility for every proposed drop-in candidate, particularly the CY8C27443 variants whose internal resources may differ even though the package is also identified as 28-SOIC.
Do not treat a matching 28-SOIC outline and 24 MHz clock as sufficient proof of interchangeability. Compare the complete manufacturer ordering table and device pin description for the target and candidate, including supply voltage, I/O direction, analog-function conflicts, reset behavior, boot configuration, programming, and peripheral availability. The verified search excerpts establish package and headline CPU data but do not expose a full pin-function matrix, so qualification should include schematic, firmware, and hardware regression testing before substitution.
Validate the supply rail and decoupling against the device's electrical characteristics before layout is released. The supplied data confirms the processor and memory identity but does not state operating-voltage limits or current consumption. Use the manufacturer guidance for the exact ordering code rather than assigning a nominal voltage from a generic PSOC 1 reference. Place the required bypass capacitor close to the supply and ground pins, minimize loop area, and account for startup current and analog-reference requirements if those features are enabled.
Plan for the M8C programming and debug interface before fixing the PCB layout. Although the specific programming pins and programming-voltage requirements are absent from the verified excerpts, the schematic should expose the required programming access when production volume permits. Keep sensitive analog routing away from fast digital and switching nodes, provide a quiet ground reference for mixed-signal measurements, and follow the manufacturer pin and layout guidance for the selected configuration. This reduces rework risk when moving among closely related CY8C26xxx variants.
Compliance Information
The supplied verified results do not state component-level RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields must be verified from the manufacturer product page or declaration of conformity for the exact ordering code.
