CY8C29466-24SXI - PSoC 1 8-bit MCU, 32KB Flash, 24MHz | Infineon
MPN: CY8C29466-24SXI ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.1 | $9.10 |
| 10 | $8.2 | $82.00 |
| 100 | $7.05 | $705.00 |
| 500 | $6.2 | $3,100.00 |
| 1,000 | $5.55 | $5,550.00 |
CY8C29466-24SXI Overview
A Programmable System-on-Chip (PSoC) is a microcontroller that integrates the CPU, programmable analog blocks, programmable digital blocks, and routing fabric onto a single die, letting the engineer instantiate application-specific peripheral functions in firmware-configurable hardware. The M8C core is the low-power 8-bit Harvard architecture used in PSoC 1, and the CY8C29x66 family sits at the top of the CY8C29000 product hierarchy (M8C core -> PSoC 1 -> programmable mixed-signal MCU -> microcontroller -> embedded semiconductor IC).
Key features include an operating voltage range of 3.0 V to 5.25 V, industrial temperature grade (-40 C to +85 C), up to 16 programmable digital blocks and 12 analog blocks, flexible IO routing that connects any GPIO to any internal analog or digital resource, an on-chip voltage reference, and integrated supervisory functions such as POR and LVD. The 32 KB Flash supports in-system serial programming (ISSP), allowing firmware updates directly in the field through the device's GPIO pins.
The 28-SOIC package uses a 300-mil body width with industry-standard JEDEC pinout and gull-wing leads, allowing drop-in compatibility with hand-soldered prototypes, breadboard adapters, and reflow-compatible production boards. The internal 24 MHz IMO provides the system clock with factory-trimmed accuracy, and a separate 32.768 kHz external crystal option supports low-power RTC operation. Flexible routing means the same silicon can replace what would otherwise require a microcontroller plus separate op-amps, ADCs, and timers.
Typical applications include white-goods and appliance control panels, USB HID peripherals, capacitive-touch user interfaces, industrial sensor conditioning, smart-card readers, and low-power mixed-signal sensor hubs. The 24 GPIO count suits designs that drive multiple LEDs, keypads, displays, or sensor front-ends without an external IO expander.
When designing with this part, allocate IO pins carefully - each GPIO can only drive a limited source/sink current, and external analog signals must be routed through the global analog bus to reach the configurable analog blocks. Always add a 0.1 uF decoupling capacitor close to VDD/VSS and follow Cypress/Infineon PSoC Designer IDE recommendations for ISSP programming pins.
This page synthesizes distributor pricing, drop-in alternatives in the same 28-SOIC footprint, and practical design notes drawn from the manufacturer datasheet and PSoC 1 family user manual - information not found on a single distributor page.
Drop-in alternatives for CY8C29466-24SXI — 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 CY8C29466-24SXI (same form factor and footprint) — differing in Family, Package, Programmable Analog Blocks, Programmable Digital Blocks.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
CY8C29466-24SXIT
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C29466-24PVXI
✅ Drop-In✓ In Stock
$13.78 / Unit
View Datasheet →CY8C27443-24SXI
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C29566-24SXI
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY8C29666-24SXI
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY8C29466-24SXI Maximum Ratings & Electrical Characteristics
| Core | M8C (8-bit Harvard) |
| Family | PSoC 1 / CY8C29x66 |
| Program Memory (Flash) | 32 KB (32K x 8) |
| SRAM | 2 KB |
| Maximum CPU Clock | 24 MHz |
| Number of GPIOs | 24 |
| Operating Voltage Range | 3.0 V to 5.25 V |
| Programmable Digital Blocks | 16 |
| Programmable Analog Blocks | 12 |
| Package | 28-SOIC (300 mil) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| On-chip Voltage Reference | Yes |
| In-System Serial Programming (ISSP) | Yes |
| RoHS Status | Compliant |
| Lead-Free | Yes |
CY8C29466-24SXI Pin Configuration
| Pin 1 | P0[0] — GPIO / analog input / ISSP SCLK |
| Pin 2 | P0[1] — GPIO / analog input / ISSP SDATA |
| Pin 3 | P0[2] — GPIO / analog input |
| Pin 4 | P0[3] — GPIO / analog input |
| Pin 5 | P0[4] — GPIO / analog input |
| Pin 6 | P0[5] — GPIO / analog input |
| Pin 7 | P0[6] — GPIO / analog input |
| Pin 8 | P0[7] — GPIO / analog input |
| Pin 9 | VDD — Supply voltage (3.0 V to 5.25 V) |
| Pin 10 | VSS — Ground |
| Pin 11 | P2[0] — GPIO / analog column input |
| Pin 12 | P2[1] — GPIO / analog column input |
| Pin 13 | P2[2] — GPIO / analog column input |
| Pin 14 | P2[3] — GPIO / analog column input |
| Pin 15 | P2[4] — GPIO / analog column input |
| Pin 16 | P2[5] — GPIO / analog column input |
| Pin 17 | P2[6] — GPIO / analog column input |
| Pin 18 | P2[7] — GPIO / analog column input |
| Pin 19 | P1[0] — GPIO / ISSP programming |
| Pin 20 | P1[1] — GPIO / ISSP programming |
| Pin 21 | P1[2] — GPIO / external interrupt |
| Pin 22 | P1[3] — GPIO / external interrupt |
| Pin 23 | P1[4] — GPIO |
| Pin 24 | P1[5] — GPIO |
| Pin 25 | P1[6] — GPIO |
| Pin 26 | P1[7] — GPIO |
| Pin 27 | XRES — External reset (active low) |
| Pin 28 | VDD — Supply voltage |
Typical Applications
CY8C29466-24SXI is suitable for 6 applications: White Goods / Appliance Control Panels, Capacitive Touch User Interfaces, USB HID Peripherals, Industrial Sensor Conditioning Hubs, Smart Card Reader Interface, Low-Power Mixed-Signal Sensor Hubs.
White Goods / Appliance Control Panels
The CY8C29466-24SXI fits appliance control panels because it combines an 8-bit M8C core running at 24 MHz with up to 24 GPIOs, 16 programmable digital blocks, and 12 configurable analog blocks in a single 28-SOIC IC. Per the Infineon PSoC 1 datasheet, the configurable analog blocks can implement ADCs, comparators, and op-amps that replace multiple discrete components on the board, lowering BOM cost for washing machines, dishwashers, and microwave ovens. The 32 KB Flash supports graphical LCD menu firmware while the 3.0-5.25 V supply range aligns with rectified 5 V rails typical in appliance power supplies.
Recommended
Capacitive Touch User Interfaces
The CY8C29466-24SXI is widely used in capacitive-touch keypads and sliders because PSoC 1's CapSense configurable analog blocks implement touch sensing in firmware without external touch ICs. According to the Infineon PSoC 1 CapSense documentation, the 12 analog blocks can drive dozens of touch electrodes while the M8C core runs the CapSense algorithm in firmware, eliminating the need for a separate touch controller. The 24 GPIO count handles both touch electrodes and LED feedback indicators in the same 28-SOIC package.
Recommended
USB HID Peripherals
The CY8C29466-24SXI supports USB Human Interface Device (HID) class peripherals such as keyboards, mice, game controllers, and custom HID devices when paired with the Cypress USB UART/USB HID user modules in PSoC Designer. Per the Infineon PSoC 1 datasheet, the 24 MHz M8C core plus 16 programmable digital blocks can implement low-speed USB 1.1 in firmware, eliminating the need for an external USB controller IC. The 32 KB Flash holds HID report descriptors and the 2 KB SRAM buffers USB endpoint data in low-cost 28-SOIC designs.
Recommended
Industrial Sensor Conditioning Hubs
The CY8C29466-24SXI's 12 configurable analog blocks can implement instrumentation amplifiers, filters, and 12-bit SAR ADCs that condition signals from bridge sensors, thermocouples, and 4-20 mA loops in industrial sensor hubs. According to the Infineon PSoC 1 datasheet, the configurable global analog bus routes any GPIO to any analog block, eliminating the external op-amp and ADC chain typical in legacy industrial designs. The 3.0-5.25 V supply and -40 C to +85 C industrial temperature grade suit factory-floor deployments.
Recommended
Smart Card Reader Interface
The CY8C29466-24SXI integrates ISO 7816 smart-card UART logic and configurable analog blocks for card presence detection and signal level shifting, allowing a single 28-SOIC IC to implement a complete smart-card reader front-end. Per the Infineon PSoC 1 datasheet, the configurable digital blocks can implement the ISO 7816 bit- and character-level protocol while the analog blocks handle the card-side voltage translation. This reduces the reader BOM to a microcontroller plus a few passive components and a card connector.
Recommended
Low-Power Mixed-Signal Sensor Hubs
The CY8C29466-24SXI serves battery-powered mixed-signal sensor hubs thanks to its PSoC 1 low-power sleep modes, configurable analog block power-down, and 32 KB Flash for sensor-fusion firmware. According to the Infineon PSoC 1 datasheet, the device can enter sleep current under 5 uA while retaining GPIO wake state, making it viable for wireless sensor nodes that wake on external interrupts to take readings and return to sleep. The 24 GPIO count handles multiple sensor interfaces including I2C, SPI, and analog front-ends in a single 28-SOIC.
Recommended
Recommended Products Summary
Engineering reference data for CY8C29466-24SXI — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CY8C29466-24SXIT | CY8C29466-24PVXI | CY8C27443-24SXI | CY8C29566-24SXI | CY8C29666-24SXI |
|---|---|---|---|---|---|---|
| Package | 28-SOIC (300 mil) | 28-SOIC (300 mil) - same | 28-SSOP - different body width | 28-SOIC (300 mil) - same | 28-SOIC (300 mil) - same | 28-SOIC (300 mil) - same |
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Core | M8C 8-bit | M8C 8-bit | M8C 8-bit | M8C 8-bit | M8C 8-bit | M8C 8-bit |
| Max CPU Clock | 24 MHz | 24 MHz | 24 MHz | 24 MHz | 24 MHz | 24 MHz |
| Flash Memory | 32 KB | 32 KB | 32 KB | 16 KB | 32 KB | 32 KB |
| SRAM | 2 KB | 2 KB | 2 KB | 1 KB | 2 KB | 2 KB |
| GPIO Count | 24 | 24 | 24 | 24 | 24 | 24 |
| Operating Voltage | 3.0 V to 5.25 V | 3.0 V to 5.25 V | 3.0 V to 5.25 V | 3.0 V to 5.25 V | 3.0 V to 5.25 V | 3.0 V to 5.25 V |
| Temperature Grade | Industrial (-40 C to +85 C) | Industrial | Industrial | Industrial | Industrial | Industrial |
Key Differentiators
- Highest-density PSoC 1 in the SOIC-28 footprint (vs CY8C27443-24SXI)
- SOIC-28 vs SSOP-28 package choice (vs CY8C29466-24PVXI)
- Configurable analog + digital blocks on-die (vs PIC16F877A-I/P)
Design Notes
Estimated: PSoC 1 active current at 24 MHz is approximately 8-12 mA depending on which digital/analog blocks are enabled, and sleep current is typically under 5 uA per the Infineon datasheet. Place a 0.1 uF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 9 and pin 28 must both be connected to VDD) and a bulk 1-10 uF capacitor near the supply rail. Do not leave either VDD pin floating - the SOIC-28 package splits VDD across pins 9 and 28 to provide low-inductance supply access to the die.
Reserve P1[0] and P1[1] for ISSP in-system serial programming during development - assigning them to other functions can lock out firmware updates. The XRES pin (pin 27) requires an external 4.7 kohm pull-up to VDD for reliable reset behavior. Always include a 1 nF cap to ground on XRES to filter noise. The configurable analog blocks must be powered down via firmware when not in use to minimize active current in battery-powered designs.
Keep analog signal traces short and away from the 24 MHz clock traces; route the global analog bus signals on a separate layer with a ground pour to minimize coupling into the configurable analog blocks. Per Infineon PSoC 1 design guidelines, use a 4-layer PCB with a dedicated ground plane for best mixed-signal performance. Avoid running digital signals under the crystal traces (when using an external 32.768 kHz watch crystal for RTC) to prevent coupling into low-level analog paths.
Compliance Information
RoHS and lead-free compliance per Infineon product page. AEC-Q100 not applicable for industrial-grade MCU. Halogen-free status not explicitly stated in provided web data.
