W78E365A40DL - 8-Bit 40MHz 64KB Flash MCU | Nuvoton
N.º da peça: W78E365A40DL ✓ AtivoW78E365A40DL Visão geral
An 8-bit microcontroller is a compact computing device that integrates a CPU, program memory, data memory, timers, serial interfaces, and parallel I/O on one integrated circuit. Within the product hierarchy, the W78E365A40DL is an 8-bit MCU, then a W78-series microcontroller, then an 8051-compatible controller, and finally a general-purpose embedded processor. This family is commonly used for cost-sensitive products where deterministic control and compact firmware are more important than high arithmetic throughput.
The W78E365A40DL combines 64KB of Flash program memory with 1.25KB of on-chip RAM and 32 I/O pins. Its operating frequency reaches 40 MHz, allowing faster instruction execution than lower-speed 8051 derivatives. The internal oscillator, 5 V supply description, and through-hole PDIP format are useful for industrial controllers, appliance controls, meters, and legacy 8051 equipment. A tube package also supports prototype and manual-production workflows.
The W78E core follows an 8-bit CISC architecture associated with the 8051 instruction set. Flash memory permits field reprogramming without removing the microcontroller from its socket, while the 32 available I/O pins support digital inputs, outputs, and externally interfaced peripherals. Designers should confirm each peripheral’s alternate-pin function, reset requirements, oscillator connections, and available port behavior against the Nuvoton W78E365A40DL datasheet before finalizing the board.
Typical uses include industrial sequence controllers, timer-based appliances, digital signal input modules, keypad interfaces, and small motor or relay control panels. The 40-pin PDIP package is particularly useful where socketed components, field replacement, or through-hole serviceability are preferred. The 40 MHz clock rate also makes this device more responsive than many 8-bit MCUs operated at substantially lower frequencies.
For reliable implementation, use the manufacturer’s oscillator and reset configuration, connect unused inputs to defined levels, and place decoupling capacitors close to the supply pins. Because this is a legacy-compatible 40-pin DIP microcontroller, pin-sensitive drop-in replacements should be selected only after their complete pin descriptions, memory organization, peripheral set, and electrical limits have been compared.
This product page combines the manufacturer-oriented electrical identity, verified package and memory characteristics, practical legacy-control use cases, and replacement-screening guidance needed to evaluate the W78E365A40DL for an existing 8051-based design.
Alternativas drop-in para W78E365A40DL — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Nenhuma alternativa drop-in disponível para este produto.
Solicitar alternativasW78E365A40DL Classificações máximas e características elétricas
| Product Type | 8-bit CMOS microcontroller |
| CPU Core | 8051-compatible W78 core |
| Frequência máxima de clock | 40 MHz |
| Program Memory Size | 64KB (64K x 8) |
| Program Memory Type | Flash |
| RAM Size | 1.25KB (1.25K x 8) |
| Number of I/O Pins | 32 pins |
| Encapsulamento | 40-pin PDIP |
| Tipo de montagem | Through-hole |
| Oscillator Type | Internal |
| Tensão de alimentação | 5 V |
| Packaging | Tube |
| Architecture | 8-bit CISC |
| Status RoHS | Compliant |
Guia de Configuração de Pinos do W78E365A40DL 40-pin pdip
Configuração de pinos para W78E365A40DL (pacote 40-pin pdip). 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 W78E365A40DL.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
W78E365A40DL é adequado para 6 aplicaçãos: Industrial Sequence Controller, Appliance Control Board, Digital Meter and Counter, Relay and Indicator Panel, Motor and Timing Control, Legacy Equipment Retrofit.
Industrial Sequence Controller
The W78E365A40DL fits industrial sequence controllers that combine many discrete signals with relatively simple sequencing logic. Its 32 I/O pins can accommodate limit switches, interlocks, status indicators, and solenoid controls, while the 40 MHz W78 core provides faster execution than many traditional 8-bit systems. The 64KB Flash memory supports structured state-machine firmware and diagnostics. In a through-hole industrial enclosure, the 40-pin PDIP package simplifies socketed maintenance, although input protection, relay isolation, grounding, and surge handling must be implemented outside the microcontroller.
Recomendado
Appliance Control Board
The W78E365A40DL is appropriate for appliance controllers that coordinate keys, displays, heaters, motors, and safety-related state transitions. Its 1.25KB RAM can support moderate task scheduling and I/O buffering, while 64KB Flash provides room for complete embedded firmware. The 5 V operating description and through-hole package align with many appliance boards designed for serviceable components. Engineers should partition timing-critical motor control from general logic, provide local bypass capacitance, and keep switching-node wiring away from sensitive input traces to reduce electrical interference.
Recomendado
Digital Meter and Counter
A meter, event counter, or elapsed-time instrument can use the W78E365A40DL for pulse counting, display control, mode selection, and data handling. The 32 available I/O pins support multiple displays, keypad scanning, and sensor inputs without an external bus. Its 40 MHz clock provides additional execution margin for debouncing and display refresh, and the 64KB Flash memory can retain calibration constants and instrument firmware. For accurate results, use hardware-appropriate input conditioning, account for oscillator tolerance, and avoid scheduling critical measurements around interrupt latency.
Recomendado
Relay and Indicator Panel
The W78E365A40DL can serve as the controller for a relay-based industrial panel because its 32 I/O pins provide substantial direct digital control capability. A single controller can manage interlocks, alarms, lamps, and output sequencing while storing operating modes in Flash. The through-hole 40-pin PDIP package also permits socketed replacement in field-serviceable equipment. Output drivers, flyback paths, optocouplers, and surge protection remain external requirements, and the PCB should preserve adequate creepage and separation for the voltage levels connected to the MCU pins.
Recomendado
Motor and Timing Control
For small motors, pumps, or timed actuators, the W78E365A40DL can combine timing, interlocks, limit sensing, and status reporting in one 8-bit controller. Its 40 MHz operating rate supports responsive control tasks, while two or more timers can be used for pulse generation or input capture when the selected suffix provides those functions. The 32 I/O pins simplify connection to position sensors and driver-enable signals. Confirm the exact timer resources and pin multiplexing in the datasheet, add flyback protection for inductive loads, and isolate motor current from sensitive MCU traces.
Recomendado
Legacy Equipment Retrofit
The W78E365A40DL is valuable when refurbishing an 8051-based instrument that requires Flash firmware, 32 I/O pins, and a 40-pin through-hole footprint. It can preserve much of an existing software and connector strategy while avoiding a full board redesign. The 64KB program memory accommodates updated diagnostics and communication functions, and the 1.25KB RAM supports modest working buffers. Retrofit approval should begin with a complete pin-by-pin comparison, reset and oscillator review, firmware memory-map analysis, and timing tests on the actual legacy motherboard.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para W78E365A40DL — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto |
|---|---|
| Brand | Nuvoton Technology Corporation |
| Package | 40-pin PDIP |
| CPU Core | 8051-compatible W78 core |
| Maximum Clock Frequency | 40 MHz |
| Program Memory Size | 64KB (64K x 8) |
| Program Memory Type | Flash |
| RAM Size | 1.25KB (1.25K x 8) |
| Number of I/O Pins | 32 pins |
| Supply Voltage | 5 V |
| Mounting Type | Through-hole |
Notas de projeto
Treat the 40-pin PDIP footprint as a legacy-compatible through-hole design and place a socket when field replacement is valuable. Keep the controller away from high-current switching traces and route signal ground using the return-current path of each interface. Confirm each port’s alternate function, power pins, reset pin, and oscillator connection against the manufacturer pin-description table before releasing artwork.
Place the required supply bypass capacitor adjacent to the MCU power pins and provide local bulk capacitance near the board entry point. Keep the 5 V distribution path wide enough for the controller and attached digital loads, while isolating relay, motor, and lamp currents from sensitive logic paths. Decouple noisy loads locally so their switching transients do not share a narrow return segment with the W78E365A40DL.
Do not assume that any 40-pin 8051 controller is a drop-in replacement. Compare reset behavior, oscillator arrangement, Flash wait states, interrupt vectors, serial functions, timer resources, port multiplexing, and input thresholds. In addition, validate legacy firmware against the W78 memory map and interrupt timing before production because a physically similar package does not guarantee functional equivalence.
For pulse inputs, counter loops, or communication interfaces, use Schmitt-trigger conditioning where the input threshold and noise immunity are insufficient. Keep oscillator wiring short and away from switching inductors and high-current edges. Software filtering can supplement hardware conditioning, but it cannot compensate for an input whose electrical threshold or timing margin is outside the device operating limits.
Informações de conformidade
The verified product listing identifies RoHS3 compliance. No additional REACH, halogen-free, conflict-minerals, or automotive qualification statement is established.
