CY8C3446AXI-105 - 50MHz 8051 PSoC 3 MCU | Infineon
N.º da peça: CY8C3446AXI-105 ✓ AtivoCY8C3446AXI-105 Visão geral
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.
Alternativas drop-in para CY8C3446AXI-105 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
CY8C3446AXA-105
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
CY8C3446AXI-105T
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
CY8C3446AXI-105 Classificações máximas e características elétricas
| Product Type | PSoC 3 programmable system-on-chip microcontroller |
| CPU Core | 8-bit 8051 |
| Frequência máxima de clock | 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 |
| Encapsulamento | TQFP-100, 14 x 14 mm |
| Tipo de montagem | Surface mount |
Guia de Configuração de Pinos do CY8C3446AXI-105 tqfp-100, 14 x 14 mm
Configuração de pinos para CY8C3446AXI-105 (pacote tqfp-100, 14 x 14 mm). Este CI digital inclui GPIO, interfaces de comunicação (UART, SPI, I2C) e pinos de alimentação. Consulte o datasheet do fabricante para funções alternativas dos pinos e opções de configuração. Essencial para projeto de sistemas embarcados e layout de PCB.
Nenhum dado detalhado de pinagem disponível para CY8C3446AXI-105.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
CY8C3446AXI-105 é adequado para 6 aplicaçãos: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para CY8C3446AXI-105 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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 |
Principais diferenciais
- High peripheral integration for a 100-pin embedded controller (vs CY8C3446AXA-105)
Notas de projeto
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.
Informações de conformidade
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.
