CY8C3446AXE-099 50MHz 64KB PSoC 3 MCU | Infineon
MPN: CY8C3446AXE-099 ✓ ActiveCY8C3446AXE-099 Overview
A PSoC, or Programmable System-on-Chip, is a microcontroller architecture that combines a conventional CPU with configurable analog and digital peripheral blocks. The CY8C34xx family belongs to the broader hierarchy of embedded mixed-signal controllers, combining an 8051-compatible microcontroller core with programmable system resources. This integration allows designers to configure sensing, control, communication, and timing functions in a compact device instead of relying on numerous discrete components.
The CY8C3446AXE-099 combines 64 KB flash with a 50 MHz processing core, a wide 1.71 V to 5.5 V operating range, and 62 I/O in the same 100-lead TQFP package. Its 24 universal digital blocks provide programmable logic and control functions, while the integrated analog resources support measurement and conditioning tasks. These features make the device useful in designs requiring flexible peripheral behavior, compact PCB area, and embedded control without a separate programmable logic device.
The suffix AXE identifies a specific ordering configuration within the CY8C34xx family, and the -099 designation identifies the 64 KB flash configuration. The I variant and the E variant are both listed in the same 100-pin package family, but their temperature and ordering codes must be checked before substitution. Firmware portability, oscillator configuration, analog accuracy, and required operating temperature should therefore be evaluated as a complete system rather than relying on package appearance alone.
Typical applications include industrial control panels, sensor nodes, programmable signal conditioners, building automation controllers, communication modules, and compact embedded test equipment. In these systems, the mixed-signal architecture can reduce component count and simplify firmware-based configuration. The 50 MHz core provides processing headroom for coordinating peripheral blocks, applying calibration, and supervising real-time control tasks.
The primary design consideration is the 1.71 V to 5.5 V supply range and its effect on clocking, analog references, and communication interfaces. Designers should preserve the required decoupling network, route sensitive analog inputs away from fast-switching nodes, and validate startup and shutdown behavior across the intended voltage range. The 100-pin TQFP footprint also requires careful fanout planning because its lead pitch is substantially finer than a typical dual-inline package.
This product record combines exact ordering information, verified distributor listings, package details, technical comparisons, and application-focused design guidance. It is intended to help engineers identify the correct CY8C34xx configuration, plan a pin-compatible procurement decision, and understand where the device's programmable mixed-signal resources can reduce external circuitry.
Drop-in alternatives for CY8C3446AXE-099 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
CY8C3446AXI-099
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C3446AXI-099T
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C3446AXE-099 Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit PSoC 3 mixed-signal microcontroller |
| Product Family | PSoC 3 CY8C34xx |
| Processor Core | 8051-compatible 8-bit core |
| Maximum CPU Frequency | 50 MHz |
| Flash Memory | 64 KB |
| Flash Organization | 64K x 8 bits |
| Operating Voltage Range | 1.71 V to 5.5 V |
| Number of I/O Pins | 62 |
| Universal Digital Blocks | 24 UDBs |
| Package | 100-pin TQFP, 14 x 14 mm |
| Mounting Type | Surface mount |
| Packaging | Tray |
| Core Instruction Set | 8051-compatible CISC instruction set |
CY8C3446AXE-099 100-pin tqfp, 14 x 14 mm Pin Configuration Guide
Pin configuration for CY8C3446AXE-099 (100-pin tqfp, 14 x 14 mm 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 CY8C3446AXE-099.
Refer to the datasheet for full pin configuration.
Typical Applications
CY8C3446AXE-099 is suitable for 6 applications: Industrial Control Panel, Sensor and Conditioner Node, Building Automation Controller, Programmable Signal Conditioner, Communication Gateway, Compact Test and Measurement Front End.
Industrial Control Panel
The CY8C3446AXE-099 fits an industrial control panel that coordinates digital inputs, operator indicators, sensors, and communication interfaces in one controller. Its 50 MHz 8051-compatible core can supervise control logic, while 24 universal digital blocks provide programmable functions that may reduce discrete logic. The 62-I/O count offers substantial connectivity in a 100-pin TQFP, although exact pin allocation must follow the manufacturer pin-description table. The 1.71 V to 5.5 V operating range supports flexible rail planning across embedded systems. Designers should confirm the exact temperature and ordering suffix for the installation environment.
Recommended
Sensor and Conditioner Node
The CY8C3446AXE-099 is suitable for a compact sensor node that acquires analog inputs, applies programmable conditioning, and reports processed measurements. Its mixed-signal PSoC architecture combines a 50 MHz 8051-compatible core with programmable analog and digital resources, allowing designers to reduce the number of separate signal-conditioning ICs. The 64 KB flash supports resident configuration and calibration logic, while 62 I/O provide flexible connections to sensors and actuators. Engineers should review the analog reference, input ranges, and routing requirements in the manufacturer datasheet before choosing external resistors, references, and filtering components.
Recommended
Building Automation Controller
The CY8C3446AXE-099 can serve as a building-automation controller for lighting, access, environmental sensing, and networked equipment. The 24 universal digital blocks allow time-based switching, event processing, and interface logic to be implemented in firmware-configurable hardware. With 64 KB flash and a 50 MHz core, the controller can manage multiple inputs and communication tasks while remaining within a 100-pin TQFP footprint. The 1.71 V to 5.5 V supply range gives designers flexibility for low-voltage peripherals. For deployments spanning wide environmental conditions, verify the exact E-series operating-temperature grade before production release.
Recommended
Programmable Signal Conditioner
The CY8C3446AXE-099 is appropriate for a programmable signal-conditioning module that must combine acquisition, filtering, thresholding, and output control. PSoC programmable analog and digital blocks reduce the need for fixed-function analog ICs when the end product requires configurable measurement behavior. The 50 MHz processor can perform calibration and supervisory tasks, while 64 KB flash retains application code and configuration. The 62 available I/O pins support sensor inputs, status indicators, and downstream converters. Prototype the analog layout carefully, including grounding and reference routing, because the mixed-signal performance depends on correct implementation rather than only the nominal CPU frequency.
Recommended
Communication Gateway
The CY8C3446AXE-099 can be used in a small protocol-conversion or telemetry gateway that combines serial communications, local control, and status monitoring. The 8051-compatible 50 MHz core supports protocol handling, while the programmable digital blocks can assist with framing, timing, and interface signaling. Its 64 KB flash provides useful code and configuration space, and the 100-pin TQFP offers 62 I/O for multiple buses and indicators. The 1.71 V to 5.5 V operating range simplifies adaptation to industrial interface levels when level translation is handled externally. Verify peripheral pin multiplexing in the datasheet before assigning communication functions.
Recommended
Compact Test and Measurement Front End
The CY8C3446AXE-099 is suitable for a programmable measurement front end that coordinates sensors, stimulus outputs, and host communications. Its mixed-signal resources support acquisition and control functions without requiring a separate FPGA for every interface. The 50 MHz core can process measurements, apply calibration, and manage a serial link, while 24 UDBs provide configurable digital assistance. The 100-pin TQFP and 14 x 14 mm body support compact instrumentation, although the fine lead pitch requires careful assembly capability. Confirm the analog performance, reference quality, and temperature requirements against the complete datasheet before committing to production.
Recommended
Recommended Products Summary
Engineering reference data for CY8C3446AXE-099 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CY8C3446AXI-099 | CY8C3446AXI-099T |
|---|---|---|---|
| Product Type | 8-bit PSoC 3 mixed-signal microcontroller | 8-bit PSoC 3 mixed-signal microcontroller | 8-bit PSoC 3 mixed-signal microcontroller |
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Package | 100-pin TQFP (14 x 14 mm) | 100-pin TQFP (14 x 14 mm) | 100-pin TQFP (14 x 14 mm) |
| Processor Core | 8051-compatible 8-bit core | 8051-compatible 8-bit core | 8051-compatible 8-bit core |
| Maximum CPU Frequency | 50 MHz | 50 MHz | 50 MHz |
| Flash Memory | 64 KB | 64 KB | 64 KB |
| Operating Voltage Range | 1.71 V to 5.5 V | 1.71 V to 5.5 V | 1.71 V to 5.5 V |
| Universal Digital Blocks | 24 UDBs | 24 UDBs | 24 UDBs |
| Number of I/O Pins | 62 I/O | 62 I/O | 62 I/O |
| Ordering Configuration | CY8C3446AXE-099 | CY8C3446AXI-099 | CY8C3446AXI-099T |
Key Differentiators
- Matches the documented I-series electrical configuration (vs CY8C3446AXI-099)
- Combines configurable mixed-signal resources with embedded flash (vs CY8C3446AXI-099T)
- Supports a wide embedded supply range (vs CY8C3446AXI-099)
Design Notes
Use the manufacturer's 100-pin TQFP footprint and land pattern rather than estimating it from the 14 x 14 mm body dimension. Place supply bypass capacitors close to their associated power pins, provide a low-impedance ground path, and inspect the pin table for dedicated analog and digital supply requirements. Confirm the pin-1 orientation, lead numbering, exposed thermal considerations, and assembly tolerances before releasing the PCB.
Separate sensitive analog inputs from switching nodes, high-current outputs, clock edges, and digital return currents. Use a continuous ground plane where practical and route analog signals over quiet ground regions. The PSoC 3 architecture is programmable, but correct PCB partitioning still matters for achieving repeatable measurement performance and preventing digital coupling from degrading analog results.
Do not treat the E and I suffixes as interchangeable solely because the devices use the same 100-pin TQFP package and share the same headline electrical ratings. Verify the exact ordering code, temperature grade, packaging method, qualification requirements, and lead-time status. A substitution also requires confirmation that firmware, peripheral assignments, calibration data, and production programming procedures remain valid.
Compliance Information
The exact compliance declarations and AEC-Q100 status were not identified for CY8C3446AXE-099. Confirm them against the manufacturer product page, package declaration, or applicable quality document before release.