CY8C3445LTI-089 - 50MHz 8051 MCU, 32KB Flash | Infineon
料号： CY8C3445LTI-089 ✓ 量产中CY8C3445LTI-089 概述
A PSoC 3 is a programmable system-on-chip, combining an embedded microcontroller core with configurable analog and digital peripheral blocks. Within the embedded-device hierarchy, it belongs to the 8-bit microcontroller family and uses an 8051-compatible architecture. This integration allows control logic, analog functions, communications, and human-interface functions to be implemented in a compact embedded system rather than requiring a separate microcontroller and several discrete support devices.
The CY8C3445LTI-089 provides 32 KB of flash memory organized as 32K by 8 bits, 8 KB of SRAM, and a 50 MHz processor clock. Its communications feature set includes USB, LIN, and I2C interfaces. These interfaces make the device applicable to connected control products, industrial interfaces, human-machine interfaces, and USB-connected embedded equipment. Flash storage permits firmware to be updated after manufacture, while SRAM supports working memory for real-time control operations.
The device is based on the CY8C34 family of ultra-low-power PSoC devices, whose configurable architecture allows digital functions and analog blocks to be combined according to application requirements. The family supports interrupt-driven embedded control and includes programmable resources that can replace combinations of counters, timers, communications logic, and analog interface circuitry. Peripheral configuration and firmware remain application-specific, so designers should verify the required block combinations, pin assignments, and clock settings before committing a layout.
Typical uses include capacitive-touch control panels, USB-to-LIN equipment, compact industrial controllers, sensor-interface products, and consumer human-machine interfaces. The 48-VFQFN exposed-pad package supports compact board layouts and provides a thermal path to the PCB. In USB applications, firmware must also account for enumeration, power-state management, ESD protection, and the connector's bus-routing requirements.
Layout planning should place decoupling capacitors close to the supply pins, connect the exposed pad to the appropriate ground plane, and keep sensitive analog and communication routes away from fast digital edges. Because no complete verified pin-name table or package drawing is published in the product record, use the pin-description table in the manufacturer datasheet when assigning tracks and programming the device. Confirm the exact exposed-pad and thermal-land pattern before fabrication.
This page organizes the core electrical, memory, interface, environmental, and packaging characteristics into an engineering-focused selection reference. It also provides application guidance, sourcing questions, and design cautions that help teams evaluate the CY8C3445LTI-089 for compact 8051-based embedded designs without obscuring the differences between an exact orderable part and a broader functional equivalent.
直接替换替代料： CY8C3445LTI-089 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料CY8C3445LTI-089 最大额定值与电气特性
| Product Type | 8-bit PSoC 3 microcontroller |
| Processor Core | 8051 |
| Maximum CPU Frequency | 50 MHz |
| Flash Program Memory | 32 KB (32K x 8 bits) |
| SRAM | 8 KB |
| Supply Voltage Range | 1.71 V to 5.5 V |
| 工作温度范围 | -40 °C to +85 °C ambient |
| 封装 | 48-VFQFN exposed-pad, 7 mm x 7 mm |
| 安装类型 | Surface mount |
| USB Interface | Yes |
| LIN Interface | Yes |
| I2C Interface | Yes |
| Data Pointers | 2 |
| Interrupt Sources | 27 |
| Interrupt Priority Levels | 8 |
| Flash Protection Levels | 4 |
| EEPROM | 1 KB |
| ECC Flash | 8 KB |
| Peripheral Hub Unit | 1 unit with 8 parallel access paths |
| Packaging | Tray |
CY8C3445LTI-089 48-vfqfn exposed-pad, 7 mm x 7 mm 引脚配置指南
CY8C3445LTI-089（48-vfqfn exposed-pad, 7 mm x 7 mm 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： CY8C3445LTI-089.
请参阅 数据手册 以查看完整引脚配置。
典型应用
CY8C3445LTI-089 适用于 6 应用s: USB-Connected Embedded Controller, LIN Network Control Module, Capacitive-Touch Human-Machine Interface, Industrial Sensor Interface, Connected Consumer Control Panel, Compact Communications Gateway.
USB-Connected Embedded Controller
The CY8C3445LTI-089 fits USB-connected control products because it combines an 8-bit 8051 core running at up to 50 MHz with 32 KB of flash, 8 KB of SRAM, and an integrated USB interface. Its operating range of 1.71 V to 5.5 V supports low-voltage embedded systems when each selected peripheral is configured within its permitted limits. A designer can use the processor for device state, configuration, and control while using PSoC resources for additional digital or analog functions. Board implementation should include correct USB data routing, connector protection, power management, and decoupling close to the supply pins.
推荐
LIN Network Control Module
The CY8C3445LTI-089 is suitable for LIN-connected automotive or industrial subsystems because the 50 MHz 8051 core provides deterministic control performance and the device includes a LIN interface alongside USB and I2C. Its 32 KB flash and 8 KB SRAM support protocol handling, diagnostics, and application state without requiring a separate processor. The 48-VFQFN package also keeps the controller compact for space-constrained modules. Designers must add the correct bus protection, account for automotive transient exposure where applicable, and validate wake-up, sleep, and fault behavior against the final network specification.
推荐
Capacitive-Touch Human-Machine Interface
The CY8C3445LTI-089 supports capacitive-touch control panels by combining a high-speed 8051 core with the programmable analog and digital resources of the PSoC 3 architecture. With 32 KB of flash for interface firmware, 8 KB of SRAM, and operation from 1.71 V to 5.5 V, it can manage touch scanning, filtering, indicators, and communications in one compact controller. The exposed-pad 48-VFQFN package reduces board area, although thermal and assembly planning remain necessary. Final validation should cover electrode geometry, panel materials, humidity, conducted noise, and the intended human-acceptance criteria.
推荐
Industrial Sensor Interface
The CY8C3445LTI-089 is a practical controller for compact sensor-interface equipment that requires local acquisition, filtering, and communication. Its configurable PSoC blocks can support analog conditioning, digital timing, and counter functions alongside the 8051 core, while 32 KB of flash stores application code and 8 KB of SRAM handles working data. The 1.71 V to 5.5 V supply range accommodates low-voltage industrial designs when all interface limits are respected. Engineers should budget analog settling time, protection, grounding, and calibration storage, then verify sensor accuracy across the full -40 °C to +85 °C operating range.
推荐
Connected Consumer Control Panel
The CY8C3445LTI-089 can serve as the central controller in a compact consumer control panel that combines capacitive sensing, status indicators, USB connectivity, and I2C accessories. Its 50 MHz 8051 core provides responsive control, while the programmable PSoC resources reduce the need for separate logic devices. The 48-VFQFN package is useful when the enclosure provides limited PCB area, and the 1.71 V to 5.5 V operating range supports several low-voltage power architectures. Firmware should include debounce and filtering, safe recovery after power loss, and compatibility checks for attached accessories before production programming.
推荐
Compact Communications Gateway
The CY8C3445LTI-089 fits a small protocol-conversion gateway that needs USB plus a wired industrial or automotive network interface. Its 8051 core can execute protocol handling at up to 50 MHz, while 32 KB of flash and 8 KB of SRAM provide space for firmware and packet-processing state. The integrated USB, LIN, and I2C interfaces enable a bridge among local devices without requiring three discrete controllers. Layout must preserve signal integrity on each interface, provide adequate copper for the exposed pad, and isolate noisy communication paths from sensitive analog blocks used by the PSoC configuration.
推荐
推荐产品汇总
工程参考数据： CY8C3445LTI-089 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 |
|---|---|
| Package | 48-VFQFN exposed-pad, 7 mm x 7 mm |
| Brand | Infineon Technologies |
| Processor Core | 8051 |
| Maximum CPU Frequency | 50 MHz |
| Flash Program Memory | 32 KB (32K x 8 bits) |
| SRAM | 8 KB |
| Supply Voltage Range | 1.71 V to 5.5 V |
| Operating Temperature Range | -40 °C to +85 °C ambient |
| Communications Interfaces | USB, LIN, and I2C |
| Mounting Type | Surface mount |
关键差异点
- Integrated multi-protocol connectivity （对比 A conventional 8051 microcontroller)
- Configurable mixed-signal resources （对比 A fixed-function 8051 microcontroller)
- Low-voltage operation with compact packaging （对比 A larger-package legacy controller)
设计说明
Place every required bypass capacitor directly beside the associated CY8C3445LTI-089 supply pin, with the shortest practical ground return. Apply the manufacturer package drawing for the 48-VFQFN exposed-pad land pattern and thermal-via arrangement rather than adapting a generic 48-pin QFN footprint. Confirm courtyard clearance and exposed-pad dimensions against the current datasheet revision before releasing the PCB.
Separate USB, LIN, I2C, clock, and sensitive analog routes from switching nodes and high-current return paths. USB differential routing requires matched geometry and a continuous reference plane; LIN requires appropriate network termination and protection; I2C needs correct pull-up placement. These interface routes should be reviewed with the peripheral configuration and system clock in mind because PSoC block assignments can change the active pin functions.
Validate startup and shutdown behavior across the full 1.71 V to 5.5 V supply range, including USB attachment, brownout, and brownout recovery. Firmware should avoid driving external loads before supplies and configured peripherals are valid, and external circuitry should not back-feed an unpowered I/O pin. Confirm each peripheral's voltage limit and configure unused pins according to the manufacturer's recommendations.
The 48-VFQFN exposed pad is the principal thermal path, so its connection to the PCB copper and thermal vias must match the manufacturer land pattern. Actual junction temperature depends on CPU activity, selected peripherals, supply voltage, ambient temperature, and PCB copper area. Verify the design at the highest expected activity and temperature rather than treating the -40 °C to +85 °C ambient rating as a complete thermal guarantee.
Do not substitute a generic 8051 or another PSoC device solely by processor speed or package count. Check flash size, SRAM size, USB and LIN availability, I2C resources, analog blocks, exposed-pad connections, temperature grade, and suffix-specific ordering information. After substitution, retest firmware startup, peripheral interrupts, USB enumeration, LIN communication, timing, and thermal behavior.
合规信息
The manufacturer datasheet and exact package declarations should be checked for environmental, material, and automotive qualification statements before production release.
