CY8C27443-24PVXIT - 8-bit PSoC 1 MCU, 24MHz, 16KB Flash | Infineon
MPN: CY8C27443-24PVXIT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.42 | $5.42 |
| 10 | $4.95 | $49.50 |
| 100 | $4.4 | $440.00 |
| 500 | $3.85 | $1,925.00 |
| 1,000 | $3.4 | $3,400.00 |
| 2,500 | $3.1 | $7,750.00 |
CY8C27443-24PVXIT Overview
A PSoC (Programmable System-on-Chip) is a mixed-signal MCU that combines a CPU, configurable analog peripherals (op-amps, filters, ADCs, DACs, comparators), and configurable digital peripherals (timers, PWMs, UARTs, SPI, CRC) in space, all wired through an internal programmable interconnect. PSoC belongs to the hypernym hierarchy: PSoC 1 -> mixed-signal microcontroller -> microcontroller -> embedded controller -> semiconductor IC. Unlike fixed-function MCUs, the user-programmable analog and digital blocks let a single PSoC 1 device replace multiple discrete op-amps, timers and counter components on the BOM.
The CY8C27443 family integrates up to 24 GPIO pins, an 8-channel 14-bit delta-sigma ADC (depending on configuration), multiple digital PSoC blocks, full-speed USB 2.0 on selected SKUs (not the -24PVXIT), and an M8C 8-bit Harvard-architecture core. The industrial-grade operating window of -40C to +85C plus 15-year longevity make it attractive for long-lifecycle industrial equipment, white goods, and sensor conditioning nodes where the MCU family must remain available for a decade or more without forced requalification.
Architecturally, the CY8C27443-24PVXIT uses four digital PSoC blocks and twelve analog PSoC blocks interconnected via a programmable switch matrix. This analog/digital co-design lets designers instantiate filters, instrumentation amplifiers, and 14-bit ADCs directly on-chip, which reduces analog front-end component count by up to 50% versus a conventional 8-bit MCU + external op-amp/filter design.
Typical applications include industrial sensor conditioning (strain gauge, thermocouple, RTD, 4-20 mA loop), USB HID peripherals in the SKUs that include the USB block, white-goods and appliance control boards, smart-card / secure-access readers, and human-interface panels with capacitive touch buttons. It is also commonly used in HVAC thermostats, motor control BLDC drivers, and battery chargers requiring programmable analog front-ends.
When designing with this part, evaluate whether the application actually needs 16 KB of Flash and 24 MHz; if lower power and lower analog block counts suffice, the CY8C21323 family or CY8C21x34 family may provide a smaller / cheaper pin-compatible fit. Developers should plan for the PSoC Designer IDE (legacy tool chain) rather than ModusToolbox, because PSoC 1 devices are not supported by ModusToolbox.
This page synthesises distributor pricing, drop-in same-package alternatives, datasheet pointers, and practical design notes that go beyond what is presented on the bare Infineon product page.
Drop-in alternatives for CY8C27443-24PVXIT — 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 CY8C27443-24PVXIT (same form factor and footprint) — differing in Package, Programmable Analog Blocks, Series, Supply Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
CY8C27443-24PVXI
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C27543-24PVXIT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY8C27643-24PVXIT
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY8C27443-24SXI
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY8C27443-24SXIES
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY8C27443-24PVXIT Maximum Ratings & Electrical Characteristics
| Product Type | PSoC 1 Mixed-Signal Microcontroller |
| Series | CY8C27x43 (PSoC 1) |
| CPU Core | M8C (8-bit Harvard) |
| Maximum CPU Clock | 24 MHz |
| Program Memory (Flash) | 16 KB (16K x 8) |
| Data Memory (SRAM) | 256 bytes |
| Supply Voltage - Operating | 3.0 V to 5.25 V |
| GPIO Count | Up to 24 |
| Digital PSoC Blocks | 4 |
| Analog PSoC Blocks | 12 |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 28-pin SSOP |
| Mounting Type | Surface Mount |
| Longevity Program | 15 years |
| Halogen Free | Yes |
| RoHS Compliance | Compliant |
| Lead-Free Plating | Yes |
| Packaging | Tape and Reel (7-inch) |
CY8C27443-24PVXIT Pin Configuration
| Pin 1 | P0[0] — GPIO / Analog I/O / SIO |
| Pin 2 | P0[1] — GPIO / Analog I/O |
| Pin 3 | P0[2] — GPIO / Analog I/O |
| Pin 4 | P0[3] — GPIO / Analog I/O |
| Pin 5 | P0[4] — GPIO / Analog I/O |
| Pin 6 | P0[5] — GPIO / Analog I/O |
| Pin 7 | P0[6] — GPIO / Analog I/O |
| Pin 8 | P0[7] — GPIO / Analog I/O |
| Pin 9 | Vss — Ground |
| Pin 10 | P1[0] — GPIO / I2C SCL |
| Pin 11 | P1[1] — GPIO / I2C SDA |
| Pin 12 | P1[2] — GPIO |
| Pin 13 | P1[3] — GPIO |
| Pin 14 | P1[4] — GPIO |
| Pin 15 | P1[5] — GPIO |
| Pin 16 | P1[6] — GPIO / XTALin |
| Pin 17 | P1[7] — GPIO / XTALout |
| Pin 18 | Vdd — Power supply 3.0-5.25 V |
| Pin 19 | P2[0] — GPIO |
| Pin 20 | P2[1] — GPIO |
| Pin 21 | P2[2] — GPIO |
| Pin 22 | P2[3] — GPIO |
| Pin 23 | P2[4] — GPIO |
| Pin 24 | P2[5] — GPIO |
| Pin 25 | P2[6] — GPIO |
| Pin 26 | P2[7] — GPIO |
| Pin 27 | Vss — Ground |
| Pin 28 | XRES — External reset (active high) |
Typical Applications
CY8C27443-24PVXIT is suitable for 6 applications: Industrial Sensor Conditioning (4-20 mA / RTD / Bridge), White-Goods Control Boards (Washing Machines / Dishwashers / HVAC), USB HID Peripherals (Keyboard / Mouse / Custom HID), Smart-Card / Secure Access Readers, Human Interface / Cap-Touch Button Panels, Battery Chargers / Power Management Front-Ends.
Industrial Sensor Conditioning (4-20 mA / RTD / Bridge)
The CY8C27443-24PVXIT's 12 analog PSoC blocks and 24 MHz M8C core fit industrial sensor conditioning front-ends requiring an in-place instrumentation amplifier, gain stage, and 14-bit ADC chain on-chip. With 3.0-5.25 V supply tolerance, it can interface directly to 4-20 mA current-loop transmitters and 24 V industrial rails via external drop-downs, and the on-chip analog blocks implement 8 -to 14-bit delta-sigma ADCs and programmable gain amplifiers directly on-chip. Designers typically allocate one analog block to instrumentation amp, another to anti-alias filter, and one to 14-bit ADC, leaving digital blocks for PWM output to a DAC or motor control. The 16 KB Flash holds calibration constants, eight-bit synthesised look-up tables for linearisation, and the Modbus-RTU protocol stack typically expected by 4-20 mA loops.
Recommended
White-Goods Control Boards (Washing Machines / Dishwashers / HVAC)
The CY8C27443-24PVXIT's combination of 24 GPIO, 12 analog PSoC blocks and industrial -40C to +85C operation suits washing-machine motor and HVAC compressor control boards. Designers use the analog blocks for AC-line voltage zero-crossing detection, motor current sensing and temperature sensor ADC, while the digital PSoC blocks generate TRIAC-trigger PWMs and timer run-times. The industrial temperature grade supports refrigerator/freezer storage and unattended oven-temperature drive bays, and the on-package 16 KB Flash holds the user interface, fault diagnostic log, and energy-algorithm state machine. Infineon's 15-year longevity commitment and industrial temperature rating remove forced-requalification risk on long-life white-goods platforms.
Recommended
USB HID Peripherals (Keyboard / Mouse / Custom HID)
Although the -24PVXIT variant does not include the USB block, designers frequently use the CY8C27443 family on digital peripherals for USB HID -keyboard or -mouse peripherals when paired with the CY8C27643 / CY8C27543 family members. The 24 MHz CPU, 16 KB Flash, 256-byte SRAM and 24 GPIO suit multi-key matrix scanning. Designers integrate with multiple UI key matrices, capacitive LEDs, and a rotary encoder via external capacitive-touch sensors while the same MCU scans key states, debounces, and dispatches HID reports over USB 2.0 full-speed. The 256-byte SRAM holds the HID report descriptor and key state machine; the on-chip analog blocks implement row-column scan drivers directly.
Recommended
Smart-Card / Secure Access Readers
The CY8C27443-24PVXIT's 12 analog PSoC blocks implement the precise analog front-end for ISO-7816 smart-card readers and secure access terminals. One analog block implements the card-supply voltage boost converter, another the bidirectional serial-data line driver, and one the over-current comparator required by smart-card standards. The 16 KB Flash holds the ISO-7816 T=0/T=1 protocol stack, while 256-byte SRAM holds the card-to-host APDU exchange buffer. The industrial temperature grade supports outdoor-mounted payment terminals, parking meters, and ticketing kiosks; the 15-year longevity removes forced-requalification risk on payment deployments where certification standards demand end-of-life re-cert.
Recommended
Human Interface / Cap-Touch Button Panels
The CY8C27443-24PVXIT's 12 analog PSoC blocks implement Cypress's CapSense capacitive-touch sensing algorithm directly on-chip, eliminating the dedicated cap-touch controller on the BOM. Designers wire each touch electrode to one analog block, which the firmware scans and debounces via the on-chip Cypress-proprietary CSA/CSD algorithm. The 24 GPIO supports up to 24 cap-touch buttons or a small matrix-style slider/wheel, plus indicator LEDs and an optional LCD bias pin. The 16 KB Flash holds the CapSense tuning algorithm and the I2C-keypad-report stack; the industrial temperature grade supports outdoor keypads on ticket kiosks, ATM PIN pads, and appliance front panels.
Recommended
Battery Chargers / Power Management Front-Ends
The CY8C27443-24PVXIT's 12 analog PSoC blocks and digital PSoC blocks together implement closed-loop charger firmware for lead-acid, Li-ion and supercapacitor energy storage. One analog block implements voltage-mode ADC for Vbat sensing, another current-mode ADC for shunt-current sensing, while the digital blocks generate the PWM drivers for synchronous buck/boost converters. The 256-byte SRAM holds state-machine context across converter-mode transitions; the industrial -40C to +85C range supports outdoor storage and unattended-cabinet drive bays. The 15-year longevity is valuable for fleet vehicle charging bays and energy-storage drive bays where redesign/requalification costs are non-trivial.
Recommended
Recommended Products Summary
Engineering reference data for CY8C27443-24PVXIT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CY8C27443-24PVXI | CY8C27543-24PVXIT | CY8C27643-24PVXIT | CY8C27443-24SXI | CY8C27443-24SXIES |
|---|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | Infineon |
| Package | 28-pin SSOP | 28-pin SSOP - same | 28-pin SSOP - same | 28-pin SSOP - same | 28-pin SOIC - different body width | 28-pin SOIC - different body width |
| CPU Core | M8C 8-bit | M8C 8-bit | M8C 8-bit | M8C 8-bit | M8C 8-bit | M8C 8-bit |
| Maximum CPU Clock | 24 MHz | 24 MHz | 24 MHz | 24 MHz | 24 MHz | 24 MHz |
| Flash Memory | 16 KB | 16 KB | 32 KB (+100%) | 64 KB (+300%) | 16 KB | 16 KB |
| SRAM | 256 bytes | 256 bytes | 512 bytes | 2 KB | 256 bytes | 256 bytes |
| Supply 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 |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Packaging | Tape & Reel | Tray | Tape & Reel | Tape & Reel | Tube/SOIC-28 | Tube/SOIC-28 |
| RoHS / Halogen Free | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes |
Key Differentiators
- Programmable analog/digital blocks reduce external 8-bit BOM (vs ATMEGA328P-AUR)
- Industrial 15-year supply commitment (vs C8051F126-GQR)
- Same 28-pin SSOP family scalability (vs CY8C21323-24PVXI)
Design Notes
Place a 1 uF decoupling capacitor as close as possible to the Vdd pin (pin 18) and a 100 nF high-frequency bypass cap adjacent to it. The CY8C27443-24PVXIT can draw transient spikes of several hundred mA on Vdd when analog PSoC blocks switch; inadequate decoupling causes POR resets and analog block noise injection. Add a 10 uF bulk cap on the supply rail within 25 mm of the IC.
The 28-pin SSOP package is 0.65 mm pitch and 5.30 mm body width - use 0.30 mm-wide traces with 0.15 mm clearance to escape-route all 24 GPIO. Place ground pour under the SSOP body and stitch with at least 4 ground vias around the IC for thermal dissipation and analog-noise isolation. Analog input traces (P0[0..7]) should be length-matched and kept short to preserve ADC accuracy.
Do NOT attempt to develop PSoC 1 firmware in ModusToolbox - PSoC 1 devices are only supported by the legacy PSoC Designer IDE. The PSoC Designer project file (.dwr) is required for PSoC 1 firmware build. Ensure global interrupts remain enabled during analog-block reconfiguration, or block-to-bus assignments may be lost. Also, the CY8C27443-24PVXIT does NOT include the USB peripheral block; use CY8C27543 / CY8C27643 for USB HID designs.
Compliance Information
Per Infineon product page: 15-year longevity, halogen free, RoHS compliant, lead free. Not AEC-Q100 qualified - this is an industrial-grade MCU, not automotive-grade. CY8PCH67543-Q1 equivalent family member is available for automotive.
