W78E365A40FL - 40MHz 8051 MCU with 64KB Flash | Nuvoton
MPN： W78E365A40FL ✗ 停產W78E365A40FL 概覽
An 8-bit CISC microcontroller is a semiconductor controller that executes an instruction set designed around compact, cycle-efficient operations. Within the broader hierarchy of embedded processing, this device belongs to the 8051/8052 MCU family, integrates a CPU, flash memory, RAM, timers, serial interfaces, and I/O ports, and is intended for industrial control, instrumentation, appliance control, and compact embedded products. Its 40 MHz operating speed supports faster control-loop and peripheral servicing than lower-rate 8051 derivatives.
The W78E365A40FL combines 64 KB of flash with a 4 KB boot block, providing 68 KB of separately organized nonvolatile memory when both regions are considered. Its 1.25 KB RAM provides working memory for variables, stack operations, and peripheral buffers. With 36 I/O pins, the device can support multiple digital interfaces and discrete control signals while retaining the external connectivity associated with a 44-pin PQFP package.
The W78E365A40FL uses an 8052-compatible 8-bit CISC core, flash program memory, and an internal oscillator. The flash architecture permits firmware to be programmed or rewritten during development and production updates rather than relying on masked ROM. Its operating architecture is suited to interrupt-driven embedded systems, where timers, serial communications, and external events can coordinate real-time control functions through the microcontroller’s peripheral set.
Typical applications include industrial equipment controllers, data acquisition and instrumentation modules, motor and relay-control boards, programmable logic controllers, appliance interfaces, and embedded products requiring a combination of 36 digital I/O lines and 40 MHz processing. The 44-pin PQFP footprint also supports designs that benefit from a conventional leaded package rather than a very-small-body surface-mount option.
Designers should verify oscillator, reset, power, and I/O conditions against the manufacturer datasheet before committing a PCB layout. Because this is a leaded PQFP device, include adequate board spacing, inspect solder joints after assembly, and review the operating-voltage limits and decoupling requirements for the intended power environment.
This product page consolidates the verified device identity, package, memory organization, interface count, and application guidance, while distinguishing confirmed characteristics from parameters that still require validation against the complete manufacturer datasheet.
直接替換替代品，適用於 W78E365A40FL — 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W78E365A40FL 最大額定值與電氣特性
| Product Type | 8-bit CISC flash microcontroller |
| Microcontroller Core | 8052-compatible core |
| 最大時脈頻率 | 40 MHz |
| Program Memory Size | 64 KB |
| Program Memory Organization | 64K x 8 |
| Program Memory Type | Flash |
| Boot Block Size | 4 KB |
| RAM Size | 1.25 KB |
| RAM Organization | 1.25K x 8 |
| Number of I/O Pins | 36 |
| 供應電壓 | 5 V |
| 封裝 | 44-pin PQFP |
| 安裝類型 | Through-hole |
| Oscillator Type | Internal |
| Packaging | Tray |
| Lead-Free Status | Pb-free |
W78E365A40FL 44-pin pqfp 腳位配置指南
W78E365A40FL（44-pin pqfp 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： W78E365A40FL.
請參閱 資料表 以查看完整腳位配置。
典型應用
W78E365A40FL 適用於 6 應用s: Industrial Equipment Controller, Data Acquisition and Instrumentation, Appliance and HVAC Control, Motor and Relay Control, Programmable Logic Controller, Embedded Communications Gateway.
Industrial Equipment Controller
The W78E365A40FL fits industrial equipment controllers that coordinate discrete inputs, outputs, timers, and communications around a 5 V logic environment. Its 8-bit 8052-compatible core operates at up to 40 MHz, providing faster response than lower-frequency 8051 derivatives, while 64 KB of flash stores application firmware and a 4 KB boot block supports controlled startup behavior. The 36 I/O pins offer substantial connectivity for sensors, relay drivers, status indicators, and operator interfaces. Its 44-pin PQFP package is also practical for through-hole assembly and maintenance-friendly industrial boards.
Data Acquisition and Instrumentation
The W78E365A40FL is suitable for measurement and instrumentation modules that must collect digital inputs and coordinate an external analog front end. The 40 MHz CISC core can service interrupt-driven acquisition routines, timers, and serial data transfer while 1.25 KB of RAM handles working variables and short data buffers. Its 64 KB flash capacity is appropriate for calibration logic, protocol handling, and diagnostic routines, and the separate 4 KB boot block can protect startup or recovery code. Validate analog timing and precision at the system level rather than inferring them from MCU specifications.
Appliance and HVAC Control
The W78E365A40FL can serve as the central controller in an appliance or HVAC control board where a reliable mix of digital I/O, flash firmware, and moderate processing speed is needed. Its 36 I/O pins can connect switches, displays, relays, sensors, and status LEDs without requiring a large external interface controller. The 64 KB flash supports field-updateable control logic, while the 40 MHz 8052-compatible core allows responsive multitasking of timers and communication routines. The 44-pin leaded PQFP package supports conventional product-assembly processes and serviceable controller boards.
Motor and Relay Control
The W78E365A40FL is appropriate for small motor-control, solenoid-control, and relay-sequencing modules built around an 8-bit MCU. Its 36 I/O pins provide enough parallel connections for control inputs, feedback signals, output enables, and status functions, while timers support repeatable switching and sequencing tasks. A 5 V supply architecture and up to 40 MHz operation simplify the digital control side of the design. External drivers remain necessary for loads above the microcontroller’s direct output capability, with flyback or suppression networks selected for the inductive load.
Programmable Logic Controller
The W78E365A40FL can form the core of a compact PLC or machine-control node requiring deterministic digital I/O and field-updatable logic. Its 64 KB flash stores control routines, communication handlers, and diagnostics, while the 4 KB boot block provides a natural boundary for protected startup or recovery code. The 36 available I/O pins support a useful combination of discrete field inputs and outputs. The 40 MHz core and 1.25 KB RAM are adequate for compact supervisory control, although scan-time, interrupt-latency, and communication requirements should be verified through application testing.
Embedded Communications Gateway
The W78E365A40FL is suitable for a small embedded gateway that converts serial or discrete field signals into a higher-level control interface. Its 40 MHz 8-bit core can handle protocol framing, timers, and buffered transfers, and the 36 I/O pins leave connections available for status indicators, configuration straps, or isolated field interfaces. The 64 KB flash supports gateway firmware while the 4 KB boot block can isolate a controlled initialization path. Designers should confirm the exact serial-interface features and pin assignments in the manufacturer datasheet before selecting a physical protocol implementation.
工程參考資料，適用於 W78E365A40FL — 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 |
|---|---|
| Brand | Nuvoton Technology Corporation |
| Package | 44-pin PQFP |
| Microcontroller Core | 8052-compatible 8-bit CISC |
| Maximum Clock Frequency | 40 MHz |
| Program Memory | 64 KB flash |
| Boot Block | 4 KB |
| RAM | 1.25 KB |
| Number of I/O Pins | 36 |
| Supply Voltage | 5 V |
| Oscillator | Internal |
| Packaging | Tray |
主要差異化特點
- Specific 44-pin PQFP configuration with 36 I/O pins (對比N78E366APG)
- Defined flash and boot-block organization (對比N78E366APG)
- Known RAM capacity for compact control logic (對比N78E366APG)
設計說明
Create the footprint from the manufacturer’s 44-pin PQFP package drawing rather than from the fact that the device has 36 I/O pins. Confirm body length, body width, lead pitch, lead span, pin-1 marker, and the maximum lead protrusion. Because this is a leaded through-hole package, allow adequate solder-joint clearance and component spacing for assembly and inspection rather than using the compact footprint of a fine-pitch QFP device.
Design the 5 V supply path around the manufacturer’s input-voltage, absolute-maximum, and current limits. Place the recommended bypass capacitors close to the supply and ground pins with short, low-loop-inductance traces. Separate noisy loads such as relays or motors from sensitive signal paths, and provide local suppression appropriate to each load. Do not infer the complete power specification from the nominal 5 V marking in product listings.
Reserve all 44 physical pins even though only 36 are listed as I/O; the remaining positions serve power, ground, clock, reset, programming, and other control functions. Follow the manufacturer’s pin-description table when assigning nets, and use the package drawing for pin-1 orientation. Keep programming or debug interfaces accessible, avoid long traces between bypass components and device pins, and keep external oscillator-related routing isolated even when the internal oscillator is used.
Do not substitute a related 8051-family MCU based only on matching clock speed and memory capacity. Firmware compatibility can be affected by SFR addresses, interrupt vectors, timer layouts, serial peripherals, reset levels, and boot-code behavior. The cross-reference candidate N78E366APG must be checked against the original pinout, package dimensions, electrical characteristics, memory map, and peripheral registers before a drop-in replacement is approved.
Treat the 4 KB boot block as a distinct memory region rather than assuming all 68 KB of flash behaves as one uniform application area. Review the manufacturer’s memory map, programming procedure, and boot-related configuration requirements before placing update code or a recovery loader there. Also ensure that firmware does not exceed the 1.25 KB RAM budget when accounting for stack depth, peripheral buffers, and interrupt nesting.
合規資訊
The product listing identifies the W78E365A40FL as Pb-free. RoHS, REACH, halogen-free, conflict-minerals, and AEC-Q100 status require confirmation from the manufacturer’s current compliance documentation.