CY8C3665AXI-016 - 67MHz 8051 PSoC 3 MCU 32KB Flash | Infineon Technologies
MPN： CY8C3665AXI-016 ✓ 啟用中CY8C3665AXI-016 概覽
A programmable system-on-chip, or PSoC, is an integrated circuit that combines a microcontroller with configurable analog and digital peripherals. In the broader hierarchy, PSoC devices extend the MCU concept into a system-level programmable platform. CY8C3 devices use an 8051-compatible core with configurable blocks that allow designers to implement control, communication, measurement, and signal-processing functions in a compact embedded design.
The CY8C3665AXI-016 is identified as an 8051 PSoC 3 CY8C36xx-family microcontroller with 32 KB of flash organized as 32K x 8. The listed operating supply range is 0.5 V to 5.5 V, while the maximum operating frequency is 67 MHz. Its 100-TQFP package provides 100 external pins and is suitable for designs requiring substantial mixed-signal or digital connectivity.
The PSoC 3 architecture includes programmable blocks that can be configured for functions such as digital control, analog sensing, timers, communications, and signal conditioning. This flexibility helps reduce the number of external discrete components in applications that require several peripheral functions. The 8051 instruction set and single-core architecture are established in the PSoC 3 family and are supported by embedded software toolchains and programming environments.
Typical applications for this microcontroller include industrial control panels, sensor-conditioning systems, consumer appliances, building automation equipment, communication modules, and compact embedded products. The 32 KB flash capacity is suitable for firmware that includes control logic, device communication, configuration storage, and application-specific routines.
Design considerations include verifying the complete pin assignment and alternate-function multiplexing against the manufacturer pin-description table, especially for analog and communication functions. The 100-TQFP footprint also requires careful PCB escape routing, decoupling, grounding, and thermal design. Use the manufacturer datasheet for the authoritative electrical limits, pin names, package dimensions, programming requirements, and peripheral configuration details.
直接替換替代品，適用於 CY8C3665AXI-016 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： CY8C3665AXI-016 （相同外形與佔位） — 差異在於 Package, Product Type, SRAM.
CY8C3665AXI-012
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
CY8C3665AXI-024
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
CY8C3665AXI-020
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
CY8C3665AXI-008
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
CY8C3445AXI-104
✅ 直接替換📋 參考替代品（不在目錄中）
CY8C3665AXI-016 最大額定值與電氣特性
| Product Type | 8-bit 8051 PSoC 3 microcontroller |
| CPU Core | 8051 |
| 最大時脈頻率 | 67 MHz |
| Flash Memory | 32 KB (32K x 8) |
| SRAM | 4 KB |
| Data EEPROM | 1 KB |
| ECC Flash | 8 KB |
| Supply Voltage Range | 0.5 V to 5.5 V |
| Architecture | Single-core |
| Programmable Analog and Digital Blocks | Configurable PSoC 3 resources |
| Peripheral Hub Unit | 1 PHub with 8 parallel access paths |
| Interrupt Sources | 27 |
| Interrupt Priority Levels | 8 |
| Flash Protection Levels | 4 |
| 封裝 | 100-TQFP, 14 mm x 14 mm |
| 安裝類型 | Surface Mount |
CY8C3665AXI-016 100-tqfp, 14 mm x 14 mm 腳位配置指南
CY8C3665AXI-016（100-tqfp, 14 mm x 14 mm 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： CY8C3665AXI-016.
請參閱 資料表 以查看完整腳位配置。
典型應用
CY8C3665AXI-016 適用於 6 應用s: Industrial Sensor Conditioning, Consumer Appliance Control, Building Automation Controller, Communication Module, Medical and Diagnostic Instrument Control, Programmable Logic and Control Platform.
Industrial Sensor Conditioning
The CY8C3665AXI-016 fits compact industrial sensor-conditioning systems because its PSoC 3 architecture combines a 67 MHz 8051 core with configurable analog and digital blocks. A design can use the programmable resources for signal conditioning, acquisition control, threshold logic, and communications while retaining 32 KB of flash for application firmware. The 0.5 V to 5.5 V listed supply range supports integration with low-voltage sensor and signal-chain circuitry. Keep analog routing and power connections isolated from high-current switching paths, and validate the final operating temperature against the manufacturer electrical limits.
推薦
Consumer Appliance Control
For consumer appliances, the CY8C3665AXI-016 provides a compact control platform with an 8051 core, programmable digital and analog functions, and 32 KB flash for firmware. It can coordinate user inputs, motor or valve control, display functions, temperature-related sensing, and safety sequencing without requiring a large external peripheral set. Its single-core 8051 architecture is appropriate for deterministic embedded tasks, while the 100-TQFP package exposes more pins than a small leadless package. Review alternate-function assignments and ensure that critical shutdown paths remain functional during startup and fault conditions.
推薦
Building Automation Controller
The CY8C3665AXI-016 is suitable for building-automation nodes that monitor inputs and coordinate lights, alarms, actuators, or communication links. Its 27 interrupt sources and 8 priority levels support event-driven handling, while configurable PSoC resources can reduce the need for separate analog and digital interface devices. The 32 KB flash capacity can hold protocol handling, configuration logic, diagnostics, and firmware updates. Plan debounce and isolation for field wiring, maintain a controlled ground reference for low-level analog measurements, and validate communication timing against the selected peripheral configuration.
推薦
Communication Module
A compact communication module can use the CY8C3665AXI-016 as the host controller for a serial link, protocol converter, or sensor gateway. The 67 MHz 8051 core provides processing capacity for packet handling, configuration, diagnostics, and local I/O, while programmable PSoC blocks support flexible signal and timer resources. The listed 0.5 V to 5.5 V range can simplify interface planning when the module uses multiple voltage domains. Confirm the supported communication peripherals and their pin multiplexing in the manufacturer documentation, and design termination and transient protection for externally accessible interfaces.
推薦
Medical and Diagnostic Instrument Control
The CY8C3665AXI-016 can serve as the supervisory controller in diagnostic and laboratory instruments where sensing, control, and user-interface functions must coexist in one embedded platform. Its configurable analog and digital blocks support flexible measurement and signal-processing architecture, while the 8051 core handles sequencing, calibration, status, and communications. The 100-TQFP package provides access to a large pin set for external sensors and interfaces. For medical equipment, confirm the applicable temperature grade, electrical limits, safety controls, and regulatory requirements independently of the component's general-purpose qualification.
推薦
Programmable Logic and Control Platform
The CY8C3665AXI-016 is well suited to programmable logic designs where a fixed peripheral map is less desirable than configurable resources. Engineers can use the PSoC 3 blocks to implement timing, control, analog functions, and digital logic around the 8051 processor, then update behavior through firmware. The 32 KB flash supports configuration and application code, while 4 KB SRAM and the listed EEPROM provide working and persistent storage. Avoid treating the device as a generic FPGA; model timing, resource allocation, and pin assignment in the supported PSoC design environment before committing the PCB layout.
推薦
工程參考資料，適用於 CY8C3665AXI-016 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | CY8C3665AXI-012 | CY8C3665AXI-024 | CY8C3665AXI-020 | CY8C3665AXI-008 | CY8C3445AXI-104 |
|---|---|---|---|---|---|---|
| Package | 100-TQFP (14x14) | 100-TQFP (14x14) | 100-TQFP (14x14) | 100-TQFP (14x14) | 100-TQFP (14x14) | 100-TQFP (14x14) |
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies | Infineon Technologies |
主要差異化特點
- Higher listed maximum clock than many general-purpose 8051 microcontrollers (對比C8051F331R)
- Configurable PSoC 3 resources in an 8051-compatible platform (對比C8051F330R)
- Substantial memory and connectivity in one 100-pin device (對比ATTINY40-XUR)
設計說明
The listed supply range is 0.5 V to 5.5 V, but the acceptable operating range for a particular clock and peripheral configuration must be taken from the manufacturer datasheet. Place decoupling capacitors close to the device power pins and keep analog and digital return paths controlled. If the board includes a switching supply, reserve filtering and test points for measuring supply ripple at the MCU pins.
The 100-TQFP, 14 mm by 14 mm package has a dense pin pitch and many configurable alternate functions. Route pins according to the selected PSoC configuration rather than a generic 100-pin MCU template. Preserve access to programming and debug signals, maintain adequate copper around ground pins, and check the manufacturer's package dimensions and recommended land pattern before releasing the PCB footprint.
PSoC 3 devices can use programmable routing between peripherals and external pins, but this does not remove the need for careful board-level planning. Group sensitive analog inputs away from switching nodes and high-current return paths, provide local return vias, and avoid long traces adjacent to clocks or communication interfaces. Recheck the pin-mux table whenever firmware changes because the electrical function of a physical pin can change.
Do not treat a similar PSoC family member as interchangeable solely because it uses the same 100-TQFP footprint. Validate the exact ordering code, memory capacity, clock limit, temperature range, peripheral resources, and alternate-function mapping. Programming and boot behavior should also be reviewed before substitution. The safe replacement method is to compare the manufacturer ordering table and perform a hardware and firmware regression test on the revised board.
合規資訊
No explicit environmental or automotive compliance statement is included in the current product information. AEC-Q100 is marked not applicable because this is a general-purpose microcontroller rather than an explicitly automotive-qualified variant.
