CY8C3446AXI-105 - 50MHz 8051 PSoC 3 MCU | Infineon
部品番号: CY8C3446AXI-105 ✓ 生産中CY8C3446AXI-105 概要
A PSoC, or programmable system-on-chip, combines a microcontroller core, memory, configurable digital and analog peripherals, and programmable interconnect resources on one integrated device. The PSoC 3 architecture belongs to the broader embedded MCU and system-on-chip hierarchy, allowing a compact design to replace combinations of a CPU, programmable logic, interface logic, and discrete peripheral devices. This integration can reduce board area while preserving software-configurable functionality.
The CY8C3446AXI-105 includes 8 kB of SRAM, 2 kB of data EEPROM, and 8 kB of ECC flash according to the manufacturer device documentation. Its 24 digital blocks provide configurable logic resources, while the dual datapointers, DMA controller, and peripheral hub support efficient transfers between memory and peripherals. The device also provides interrupt handling with 27 sources and 8 priority levels.
Power-management options include active, sleep, and hibernate operating modes. The device consumes 1.2 mA at 6 MHz and 12 mA at 48 MHz in active mode, while sleep current reaches 200 nA. Its boost-regulator capability supports operation from a 0.5 V input when the appropriate external configuration is used, and the device can organize up to six power domains for selective peripheral control.
Typical applications include industrial control panels, compact data-acquisition modules, mixed-signal instruments, programmable automation interfaces, embedded sensor-conditioning systems, and low-power control products. The combination of an 8051 CPU, configurable digital blocks, wide voltage range, and numerous GPIO functions is particularly useful when a design needs deterministic control alongside flexible peripheral routing.
PCB design should follow the manufacturer pin and layout guidance, with particular attention to exposed supply, ground, programming, and decoupling connections. Power-domain assignments should be reviewed carefully to prevent unintended peripheral activity or sequencing conflicts. Firmware, startup behavior, clock configuration, and low-power transitions should be validated together because peripheral state and clock changes can affect the complete embedded design.
This product overview combines device characteristics with practical selection, replacement, power-management, and design guidance. It also distinguishes exact package-compatible ordering variants from functional substitutes, helping engineers assess PCB reuse and migration risk before committing to a hardware revision.
ドロップイン代替品: CY8C3446AXI-105 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
CY8C3446AXA-105
✅ ドロップイン📋 参考代替品（カタログ未掲載）
CY8C3446AXI-105T
✅ ドロップイン📋 参考代替品（カタログ未掲載）
CY8C3446AXI-105 最大定格＆電気的特性
| Product Type | PSoC 3 programmable system-on-chip microcontroller |
| CPU Core | 8-bit 8051 |
| 最大クロック周波数 | 50 MHz |
| Program Flash | 64 kB |
| SRAM | 8 kB |
| Data EEPROM | 2 kB |
| ECC Flash | 8 kB |
| Configurable Digital Blocks | 24 blocks |
| Operating Voltage Range | 1.71 V to 5.5 V |
| Ambient Operating Temperature | -40 °C to 85 °C |
| Active Current at 6 MHz | 1.2 mA |
| Active Current at 48 MHz | 12 mA |
| Sleep Current | 200 nA |
| Power Domains | Up to 6 |
| Interrupt Sources | 27 sources |
| Interrupt Priority Levels | 8 levels |
| Peripheral Hub | 1 PHub with 8 parallel access paths |
| Datapointers | 2 |
| パッケージ | TQFP-100, 14 x 14 mm |
| 実装タイプ | Surface mount |
CY8C3446AXI-105 tqfp-100, 14 x 14 mm ピン配置ガイド
CY8C3446AXI-105 (tqfp-100, 14 x 14 mm パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: CY8C3446AXI-105.
詳細は データシート をご参照ください。
主な用途
CY8C3446AXI-105 の用途: 6 件s: Industrial Control Panel, Programmable Data-Acquisition Module, Low-Power Sensor Controller, Programmable Automation Interface, Embedded Signal-Conditioning System, Compact Measurement Instrument.
Industrial Control Panel
The CY8C3446AXI-105 fits industrial control panels that combine touch or keypad input, indicator control, communications, and discrete logic in one controller. Its 24 configurable digital blocks allow functions such as input capture, counters, state logic, or interface signaling to be implemented without relying entirely on CPU routines. The 50 MHz 8051 core provides deterministic control, while 64 kB of flash supports application firmware and the 100-pin TQFP exposes substantially more I/O than a compact MCU. During hardware validation, exercise every power domain and configurable block because firmware-driven routing can mask incorrect initialization.
おすすめ
Programmable Data-Acquisition Module
The CY8C3446AXI-105 is suitable for modular data-acquisition equipment requiring simultaneous sampling coordination, programmable capture logic, and multiple external interfaces. Its dual datapointers and DMA controller can transfer data independently of the main CPU, while the PSoC peripheral hub provides parallel access paths to internal resources. The 24 configurable digital blocks can implement timing, trigger, and signal-conditioning functions in hardware. Designers should allocate clocks and routing deliberately and verify interrupt latency across all 27 supported sources, particularly when acquisition timing must remain deterministic under heavy peripheral activity.
おすすめ
Low-Power Sensor Controller
The CY8C3446AXI-105 supports low-power sensor controllers that periodically wake to measure or process data and then return to sleep or hibernate. Sleep current reaches 200 nA, while active consumption is 1.2 mA at 6 MHz, allowing the design to emphasize energy use during short processing intervals. Its wide 1.71 V to 5.5 V operating range also accommodates low-voltage sensor and I/O arrangements. Power calculations should include regulator losses, sensor current, wake duration, and the frequency of hibernate transitions; the 200 nA MCU figure alone does not describe total board consumption.
おすすめ
Programmable Automation Interface
The CY8C3446AXI-105 is appropriate for programmable automation interfaces that combine several digital I/O types, local logic, and serial communication. Configurable digital blocks can provide protocol timing, event counting, pulse conditioning, or isolated interface support, reducing repeated CPU work. The 50 MHz 8051 core remains available for supervisory tasks and higher-level control. A practical implementation should assign peripheral functions before fixing the PCB, maintain consistent signal standards across the 1.71 V to 5.5 V range, and test startup states so that outputs remain at defined levels until firmware establishes the intended operating configuration.
おすすめ
Embedded Signal-Conditioning System
The CY8C3446AXI-105 can serve as the controller in embedded signal-conditioning systems where analog and digital functions require coordinated control. The PSoC architecture places configurable blocks, memory, routing, and an 8051 processor in the same device, allowing the controller to supervise sensors, filters, and digital outputs without separate glue logic. This integration can shorten signal paths and reduce board area. The design should still separate analog, digital, and power-return paths physically, follow the manufacturer grounding recommendations, and validate conversion or conditioning behavior across temperature because a programmable architecture does not remove analog-layout constraints.
おすすめ
Compact Measurement Instrument
The CY8C3446AXI-105 supports compact measurement instruments that need extensive I/O, local data handling, deterministic control, and flexible logic. With 64 kB of flash, 8 kB of SRAM, 2 kB of EEPROM, and 8 kB of ECC flash, it can separate firmware, working data, retained parameters, and protected storage. The 100-pin TQFP package provides access to numerous GPIO and dedicated functions, while sleep and hibernate modes help reduce idle consumption. Firmware should include checksums and recovery paths for critical parameters, and the production test process should verify programming, clock startup, and low-power wake behavior.
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おすすめ製品の概要
エンジニアリング参考データ: CY8C3446AXI-105 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | CY8C3446AXA-105 | CY8C3446AXI-105T |
|---|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Package | TQFP-100 (14 x 14 mm) | TQFP-100 (14 x 14 mm) | TQFP-100 (14 x 14 mm) |
| CPU Core | 8-bit 8051 | 8-bit 8051 | 8-bit 8051 |
| Maximum Clock Frequency | 50 MHz | 50 MHz | 50 MHz |
| Program Flash | 64 kB | 64 kB | 64 kB |
| SRAM | 8 kB | 8 kB | 8 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 |
| Configurable Digital Blocks | 24 blocks | 24 blocks | 24 blocks |
| Order/Packaging Suffix | AXI-105 | AXA-105 | AXI-105T |
主な差別化要因
- High peripheral integration for a 100-pin embedded controller （vs CY8C3446AXA-105)
設計ノート
Build the power budget from the actual operating profile rather than a single active-current figure. The manufacturer documentation lists 1.2 mA at 6 MHz and 12 mA at 48 MHz, while sleep mode reaches 200 nA. Include the MCU, sensors, communications, regulators, and leakage loads in the calculation. When the boost-regulator path is considered, validate startup behavior and external component tolerances across the complete input range of 1.71 V to 5.5 V.
Assign the PSoC's configurable digital blocks and routing resources during architecture planning, because late changes can alter firmware configuration and PCB assignments. Follow the manufacturer package drawing and pin-description table for all 100 TQFP positions, including supply, ground, programming, and no-connect details. Keep sensitive signal paths away from switching nodes and place decoupling capacitors according to the recommended layout to minimize supply disturbance.
Treat the 100-pin TQFP footprint as a high-pin-count mixed-signal layout. Route clock-sensitive and programmable peripheral signals away from noisy power converters and long switching-current paths, while maintaining continuous ground-return paths beneath and between relevant circuitry. Because the device combines an 8051 CPU, configurable digital blocks, analog-capable resources, and multiple power domains, verify every domain's state during reset, sleep, hibernate, and wake transitions.
Do not assume that a similar CY8C34 ordering code is automatically interchangeable. Compare the exact temperature grade, qualification status, pin table, package drawing, memory configuration, peripheral availability, and ordering suffix in the manufacturer documentation. The CY8C3446AXA-105 is the closest documented family alternative, while the CY8C3446AXI-105T is primarily an alternate production packaging code; both still require design-authority approval before substitution.
コンプライアンス情報
The device is an industrial-temperature microcontroller rather than an automotive-qualified variant. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status require confirmation from the current manufacturer product or material-declaration documentation.
