CY8C3446PVI-076 - 50MHz 8051 PSoC 3 MCU | Cypress
MPN: CY8C3446PVI-076 ✓ ActiveCY8C3446PVI-076 Overview
A PSoC 3 is a mixed-signal microcontroller that combines an embedded CPU with programmable digital blocks and configurable analog peripherals on one chip. Its place in the embedded hierarchy is between a general-purpose microcontroller and a dedicated application-specific controller. This integration allows designers to implement sensing, control, communication, and data acquisition in one device while reducing the number of external discrete components.
The CY8C3446PVI-076 provides 64 KB of flash, 8 KB of SRAM, 2 KB of data EEPROM, 24 universal digital blocks, and eight flash protection levels. Its dual Datapointer architecture, 27 interrupt sources with eight priority levels, and configurable ADC unit make it suitable for real-time control, industrial interfaces, USB-connected peripherals, and compact consumer products. USB and serial connectivity broaden its usefulness for configuration, data transfer, and external control.
The device combines an 8051-compatible processing architecture with programmable digital peripherals and a 12-bit ADC. The universal digital blocks can support timers, counters, serial interfaces, and communication functions, while the peripheral hub provides eight parallel access paths for efficient data movement. This architecture gives designers more configuration flexibility than a fixed-function 8-bit MCU while retaining a familiar 8051 programming model.
Typical uses include USB data acquisition, touch-controlled interfaces, motor and actuator control, compact power conversion, industrial sensing modules, and USB-connected human-interface devices. The 48-SSOP package supports space-constrained designs, although its fine-pitch leads require careful PCB layout and assembly planning. The 1.71 V minimum operating voltage also permits operation across low-voltage embedded systems.
Designers should check the pin-description table, power requirements, clock requirements, and recommended decoupling in the manufacturer datasheet before assigning PCB tracks. A 48-SSOP footprint has tightly spaced leads, so inspect paste, solder mask, and assembly tolerances carefully. USB signal routing also requires controlled impedance and a clean connection between the transceiver, protection network, and connector.
This page consolidates the part identity, electrical characteristics, package information, sourcing questions, and application guidance into an engineering-focused reference. It also distinguishes documented same-family alternatives from functional equivalents, helping designers determine whether a candidate requires only schematic verification or a broader PCB and firmware migration.
Drop-in alternatives for CY8C3446PVI-076 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
CY8C3446PVI-092
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY8C3446PVI-076 Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit PSoC 3 mixed-signal microcontroller |
| CPU Architecture | 8051 |
| Maximum Clock Frequency | 50 MHz |
| Program Flash Memory | 64 KB |
| Program Memory Organization | 64K x 8 bits |
| SRAM | 8 KB |
| Data EEPROM | 2 KB |
| ADC Resolution | 12 bits |
| Operating Voltage Range | 1.71 V to 5.5 V |
| Universal Digital Blocks | 24 |
| Peripheral Hub Parallel Access Paths | 8 |
| Datapointer Architecture | Dual Datapointer |
| Interrupt Sources | 27 |
| Interrupt Priority Levels | 8 |
| Flash Protection Levels | 4 |
| Connectivity | USB plus serial connectivity |
| Package | 48-SSOP |
| Mounting Type | Surface mount |
CY8C3446PVI-076 48-ssop Pin Configuration Guide
Pin configuration for CY8C3446PVI-076 (48-ssop 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 CY8C3446PVI-076.
Refer to the datasheet for full pin configuration.
Typical Applications
CY8C3446PVI-076 is suitable for 6 applications: USB Data-Acquisition Module, Touch-Controlled User Interface, Compact Motor and Actuator Control, Industrial Sensor Interface, USB-C Connected Configuration Adapter, Programmable Embedded Control Node.
USB Data-Acquisition Module
The CY8C3446PVI-076 fits compact data-acquisition modules because it combines a 50 MHz 8051 core, a 12-bit ADC, 64 KB of flash, and USB connectivity in one 48-SSOP device. The ADC can digitize sensor inputs while programmable digital blocks handle timing, triggering, status indicators, or communications. Its 8 KB of SRAM and 2 KB of data EEPROM provide room for acquisition buffers and configuration parameters. USB reduces the need for a separate interface controller, although the board must implement the required transceiver, connector, protection, and controlled-impedance routing. Firmware should validate the selected ADC range, sampling sequence, USB transfer timing, and peripheral-clock requirements.
Recommended
Touch-Controlled User Interface
The CY8C3446PVI-076 is suitable for compact touch interfaces because its programmable digital blocks and 12-bit ADC can support touch sensing and control functions without a separate fixed-function controller. The 50 MHz 8051 core provides dedicated processing for scan timing, debounce logic, display updates, and communications. A 48-SSOP package preserves board area in handheld instruments and appliance-control panels. Design teams should allocate acquisition time between touch channels and other ADC functions, calibrate thresholds across the intended temperature range, and confirm that the display and communications peripherals remain responsive during repeated scans.
Recommended
Compact Motor and Actuator Control
The CY8C3446PVI-076 can act as the central controller in compact motor or actuator-control systems because its 24 universal digital blocks can implement timing, counting, PWM, and serial functions while the 8051 core runs supervisory logic. USB connectivity supports configuration, diagnostics, and firmware updates. The 50 MHz processing speed is useful when coordinating multiple timing-sensitive outputs, although motor-drive circuitry still requires suitable transistor or driver stages, protection, and grounding. Verify PWM frequency and resolution against the actuator requirements, keep high-current switching paths separate from sensitive analog routing, and include thermal analysis for the selected power stage.
Recommended
Industrial Sensor Interface
The CY8C3446PVI-076 is a practical choice for an industrial sensor interface requiring mixed-signal acquisition, programmable control, and compact serial connectivity. Its 12-bit ADC handles analog sensor conditioning, while the 8051 core performs scaling, filtering, threshold evaluation, and status reporting. The 64 KB flash and 8 KB SRAM support moderate protocol stacks and control tables. For factory equipment, the enclosure, grounding, isolation, surge protection, and EMC strategy remain separate system-level requirements. Confirm the exact temperature range and automotive qualification status for the selected ordering code, and validate sensor accuracy across the complete operating temperature range.
Recommended
USB-C Connected Configuration Adapter
The CY8C3446PVI-076 supports compact USB configuration adapters by combining an embedded controller, USB connectivity, serial interfaces, and programmable logic in a single 48-SSOP package. The 8051 core can handle protocol conversion, device identification, parameter storage, and diagnostics, while the 2 KB EEPROM can retain selected configuration data. USB bus-power designs must account for the device's operating-voltage range and current requirements, including startup behavior. Board implementation should include connector protection, controlled-impedance routing, correct USB transceiver support circuitry, and a firmware-controlled enumeration sequence that remains reliable across power cycles.
Recommended
Programmable Embedded Control Node
The CY8C3446PVI-076 works well as a programmable embedded control node for building control, appliance, or instrumentation products that need adaptable I/O behavior without a large external peripheral array. Its 24 universal digital blocks, dual Datapointer architecture, eight peripheral-hub access paths, and 27 interrupt sources allow designers to configure multiple timing and serial functions. The 64 KB flash supports application firmware and configuration tables, while USB or serial links provide service access. Migration to a different PSoC configuration still requires review of interrupt assignments, routing tables, pin multiplexing, and firmware dependencies in the design tools.
Recommended
Recommended Products Summary
Engineering reference data for CY8C3446PVI-076 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CY8C3446PVI-092 |
|---|---|---|
| Package | 48-SSOP | 48-SSOP |
| Brand | Cypress Semiconductor | Cypress Semiconductor |
| Product Family | PSoC 3 CY8C34 family | PSoC 3 CY8C34 family |
| CPU Architecture | 8051 | 8051 |
Key Differentiators
- Combines an 8051 core with programmable mixed-signal resources (vs CY8C3446PVI-092)
- USB and serial connectivity in one mixed-signal MCU (vs CY8C3446PVI-092)
- Low-voltage operation for embedded equipment (vs CY8C3446PVI-092)
Design Notes
The 48-SSOP footprint uses fine-pitch leads, so verify pad dimensions, solder-mask expansion, paste volume, and component clearance against the manufacturer package drawing and the PCB assembly process. Avoid placing tall components on the underside directly beneath the device unless panelization and soldering clearances are controlled. A footprint that fits the nominal body outline can still fail because of lead-tip length, toe spread, or courtyard differences.
Keep analog inputs associated with the 12-bit ADC away from USB, clock, and high-current switching traces. Use a continuous ground reference under the device and return analog grounds to the appropriate quiet section of the board. Place input and bypass capacitors close to their pins with short, direct connections. If a sensor input is routed a significant distance from the controller, add appropriate guarding and isolation from adjacent switching nodes.
Do not substitute the CY8C3446PVI-092 solely because the package names match. Review the ordering-code table for changes affecting clock performance, temperature grade, or other production parameters, then compare memory, ADC, USB, and peripheral assignments. A successful PCB fit does not by itself establish pin-to-pin and firmware compatibility. Preserve the original component designation and qualification records until the replacement has passed system validation.
Compliance Information
Compliance declarations for this exact ordering code were not identified. Confirm the current environmental and quality documentation with Cypress Semiconductor or Infineon before production release.
