W78L365A24PL - 8-Bit 24MHz 64KB MCU | Nuvoton | PLCC-44
MPN： W78L365A24PL ✓ 啟用中W78L365A24PL 概覽
A microcontroller is a programmable integrated circuit that combines a CPU core, memory, timers, serial interfaces, and I/O ports on one device. The W78 family belongs to the broader 8-bit embedded-controller hierarchy, where an instruction-compatible architecture can support legacy 8052 designs while flash memory simplifies firmware updating. The W78L365A24PL is intended for appliances, industrial controllers, instrumentation, and other systems that need deterministic embedded control rather than application-processing performance.
The principal device parameters are a 24 MHz clock, 64 KB of flash program memory, 1.25K x 8 bits of RAM, and 36 I/O lines. The suffix identifies the 24 MHz configuration, while the PL package designation identifies the leaded PLCC implementation. Program storage supports firmware of up to 64K x 8 bits, and the 36 available I/O pins permit connections to sensors, switches, displays, actuators, and communication peripherals.
The W78 8052-compatible core provides a familiar programming model for engineers maintaining or adapting existing 8051-family equipment. Flash-based program memory can simplify field updates because the firmware can be reprogrammed without replacing the device. Exact instruction-set extensions, interrupt-vector details, timer resources, oscillator options, electrical limits, and temperature ratings should be confirmed in the manufacturer datasheet before a new production design is released.
Typical applications include appliance control panels, small industrial controllers, data-acquisition modules, keypad interfaces, LED indicators, motor-control supervisory logic, and embedded instrumentation. The 36 I/O count is especially useful when a design must connect multiple discrete inputs and outputs while retaining a single compact controller package. For designs requiring greater processing speed, memory density, or low-power features, the available silicon should be compared against the system timing and peripheral requirements.
PCB planning should account for the PLCC package's J-lead geometry, solder-joint access, and thermal cycling requirements. Confirm the land pattern, pin-1 orientation, exposed-pad arrangement, and recommended reflow profile against the official package drawing. Do not assign signals to the 44 package positions until the complete pin description table has been checked because the visible web results do not provide a verifiable pin-by-pin map.
This product page consolidates the identified device specifications, sourcing information, engineering guidance, and strict drop-in replacement analysis. It also distinguishes confirmed electrical facts from parameters that still require direct confirmation from the manufacturer documentation before schematic release, PCB layout, or firmware transfer.
直接替換替代品，適用於 W78L365A24PL — 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。
此產品無可直接替換的替代品。
申請替代品W78L365A24PL 最大額定值與電氣特性
| Microcontroller Type | 8-bit W78 8052-compatible microcontroller |
| Operating Frequency | 24 MHz |
| Program Memory Size | 64 KB (64K x 8 bits) |
| Program Memory Type | Flash |
| RAM Size | 1.25 KB (1.25K x 8 bits) |
| Number of I/O Pins | 36 pins |
| 封裝 | 44-pin PLCC |
| Package Form | 44-LCC J-lead |
| 安裝類型 | Surface mount |
| Core Architecture | 8052-compatible 8-bit core |
| Lead-Free Status | Yes |
| RoHS 狀態 | RoHS3 compliant |
W78L365A24PL 44-lcc j-lead 腳位配置指南
W78L365A24PL（44-lcc j-lead 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： W78L365A24PL.
請參閱 資料表 以查看完整腳位配置。
典型應用
W78L365A24PL 適用於 6 應用s: Appliance Control Panel, Industrial Instrumentation, Data Acquisition Module, LED and Keypad Interface, Legacy 8052 Equipment Upgrade, Motor Control Supervisor.
Appliance Control Panel
The W78L365A24PL fits appliance control panels that combine a keypad, status indicators, sensors, and a small motor or relay interface. Its 24 MHz operating rate supports responsive state-machine control, while 64 KB of flash provides room for appliance firmware, parameter tables, and diagnostic routines. The 36 I/O lines allow multiple switches, LEDs, and discrete sensors to be connected without requiring a large I/O expander. According to the Winbond specification listing, the device combines 64 KB flash with 1.25K x 8 RAM in a 44-pin PLCC package. Designers should reserve sufficient RAM for stack depth and task state, and should verify that the chosen peripheral outputs remain within the device's electrical limits.
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Industrial Instrumentation
The W78L365A24PL can serve as the supervisory controller in compact industrial instrumentation that gathers switch or sensor inputs, updates a display, and controls relay outputs. Its 8052-compatible core supports established embedded-control code, and the 24 MHz clock provides useful timing margin for periodic sampling and display updates. The 36 available I/O lines simplify panel wiring compared with a smaller controller, while 64 KB of flash accommodates menus, calibration constants, and fault logs. According to the Winbond documentation listing, the MCU has 1.25K x 8 bits of RAM and a 24 MHz maximum operating frequency. Before deployment, verify the voltage, temperature, and interrupt requirements against the complete manufacturer electrical specification.
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Data Acquisition Module
The W78L365A24PL is appropriate for a small data-acquisition module that coordinates an external converter, digital sensors, and a communications interface. Thirty-six I/O pins permit parallel sensor inputs, control signals, status LEDs, and host-interface lines, while the 64 KB flash region can store calibration data and a communication protocol. Its 8052-compatible architecture can simplify reuse of legacy acquisition routines. According to the Winbond specification listing, the device operates at 24 MHz with 1.25K x 8 bits of RAM. Keep buffering within the confirmed RAM capacity, account for the stack in worst-case interrupt nesting, and use the datasheet timing information when establishing converter sampling or serial transfer rates.
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LED and Keypad Interface
The W78L365A24PL provides ample I/O capacity for a keypad-and-LED interface in equipment such as test fixtures, access panels, and menu-driven controls. Its 36 I/O lines can support matrix-scanned keys, discrete indicators, and status outputs, while 24 MHz operation supports debouncing and display-refresh routines. The 64 KB flash capacity is useful when storing multiple menu pages, diagnostic messages, and configuration profiles. According to the Winbond specification listing, the part retains an 8052-compatible architecture and 1.25K x 8 RAM. Design the matrix so that LED current and key drive levels meet electrical limits, and confirm the I/O pin mapping directly from the package documentation before laying out the PCB.
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Legacy 8052 Equipment Upgrade
The W78L365A24PL is well suited to maintaining equipment built around the 8052 programming model while using a flash-memory-based controller. Its 8052-compatible core allows qualified legacy algorithms and drivers to be reconsidered without immediately moving to a different instruction set. The 24 MHz rate and 64 KB flash program region can support field updates, while 36 I/O lines accommodate existing control boards. According to the Winbond datasheet listing, the device provides 1.25K x 8 RAM and a 44-pin PLCC footprint. Validate interrupt priority, timer widths, reset behavior, and peripheral differences against the original schematic before production use; architectural compatibility does not guarantee peripheral-level equivalence.
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Motor Control Supervisor
The W78L365A24PL can act as the supervisory controller around a discrete motor-driver circuit, handling limit switches, speed-command signals, fault flags, and operator indicators. Its 36 I/O lines allow several discrete inputs and outputs to be monitored, and the 24 MHz clock supports deterministic sequencing of start, stop, and fault-recovery states. The 64 KB flash area can hold motion profiles and diagnostic logic. According to the Winbond specification listing, the controller provides an 8-bit 8052-compatible core and 1.25K x 8 RAM. Keep the MCU away from high-current switching paths, isolate noisy motor rails, and confirm whether an external watchdog or hardware shutdown is required for the final safety design.
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推薦產品摘要
工程參考資料，適用於 W78L365A24PL — 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 |
|---|---|
| Manufacturer | Nuvoton Technology Corporation |
| Package | 44-pin PLCC J-lead |
| Core Architecture | 8052-compatible 8-bit core |
| Maximum Operating Frequency | 24 MHz |
| Program Memory | 64 KB flash |
| RAM | 1.25K x 8 bits |
| Number of I/O Pins | 36 pins |
| RoHS Status | RoHS3 compliant |
主要差異化特點
- Substantial flash capacity within an 8052-compatible controller (對比Generic 8-bit MCU options)
- High I/O density for a compact leaded package (對比Smaller-pin-count 8-bit controllers)
- 24 MHz operation with 1.25K x 8 RAM (對比Lower-speed legacy controllers)
設計說明
Use the official 44-pin PLCC J-lead land pattern and preserve access around the package perimeter for inspection and rework. Confirm pin-1 orientation against the package drawing rather than inferring it from the distributor search listing. Maintain the manufacturer's recommended copper and solder-mask geometry around the lead rows, and place decoupling close to the device power pins. Because the indexed documentation does not identify every power and ground position, finalize the schematic and footprint from the complete manufacturer pin table before fabrication.
Do not treat a microcontroller with a similar 8-bit architecture or a PLCC package as a direct replacement. A valid drop-in candidate must match the 44-pin PLCC footprint, pin assignments, 24 MHz rating, 64K x 8 flash organization, 1.25K x 8 RAM, 36 I/O count, and electrical limits. Legacy 8052 instruction compatibility is helpful for firmware migration but does not guarantee that timer, interrupt, oscillator, or port behavior is identical. Validate the replacement against the original schematic and both devices' electrical characteristics.
Confirm the permitted supply range, input current, and power-consumption limits from the manufacturer datasheet before selecting regulators or bypassing capacitors. The confirmed device specification covers a 24 MHz operating rate, 64 KB of flash, and 1.25K x 8 RAM, but it does not establish the core's voltage tolerance or current draw. Apply the documented decoupling network, route return paths carefully, and account for regulator startup and transient behavior so brownouts do not place the controller or attached actuators into unsafe states.
Keep oscillator routing short, controlled, and away from switching nodes and high-current motor traces. Although 24 MHz is not an especially high interface rate, switching-node coupling can still corrupt timing-sensitive counters or communication signals. Use continuous ground references under signal routes, keep input and output wiring separated where practical, and provide defined levels for unused pins according to the manufacturer recommendations. Validate the final board with an oscilloscope at the oscillator and externally accessible I/O nodes.
合規資訊
The component listing identifies W78L365A24PL as RoHS3 compliant and lead-free. No verified automotive qualification, REACH declaration, halogen-free statement, or conflict-minerals report was identified.