W78I052DDG - 8-Bit 8051 MCU, 8KB Flash, 40-DIP | Nuvoton
料号： W78I052DDG ✓ 量产中W78I052DDG 概述
An 8-bit microcontroller is the lowest-complexity class of programmable embedded controllers. In the component hierarchy, the W78I052DDG is a microcontroller and therefore belongs to the broader integrated-circuit and embedded-processing categories. Its practical role is to execute firmware, read inputs, control outputs, and coordinate basic peripherals within appliances, industrial equipment, access systems, and small control products. Compared with a 32-bit microcontroller, it emphasizes economical control and compact software rather than high-performance computation or large memory capacity.
The verified product information identifies an 8KB Flash configuration, a 2.4 V to 5.5 V supply range, Pb-free construction, and an operating temperature range of -40°C to +85°C. The 40-DIP package provides 40 physical pins and straightforward through-hole assembly. These characteristics make the W78I052DDG relevant to designs that need a low-power, low-cost controller with legacy-compatible programming and board-level integration. Exact RAM, clock, peripheral, and electrical timing details must be confirmed in the manufacturer datasheet before schematic sign-off.
Nuvoton's W78 family provides an established 8051-style software environment, allowing familiar C or assembly development workflows and access to common embedded-control patterns such as port-based I/O, timers, serial communication, and interrupt-driven control. An enhanced 8-bit core is particularly useful for supervisory and control tasks where deterministic state-machine behavior is sufficient but a higher-cost processor and larger memory system would add unnecessary cost, board area, and power consumption.
Typical uses include appliance controllers, access-control terminals, industrial sequencers, instrumentation interfaces, lighting controls, and small embedded control boards. Its 8KB Flash supports compact firmware containing startup code, peripheral drivers, state logic, and user-interface handling. The 2.4 V to 5.5 V range permits operation across common low-voltage rails, although the designer must verify that every external peripheral shares a compatible voltage level or requires appropriate interfacing.
When designing a board around the W78I052DDG, verify oscillator, reset, programming-interface, and decoupling requirements directly against the manufacturer datasheet. Do not infer missing pin functions from the 8051 family name. The supplied search excerpt confirms the 40-DIP package and general device class, but it does not provide a complete verified pin table; consequently, the pinout field is null rather than presenting an unverified drawing.
This product record consolidates the verified supplier information, package identification, technical selection guidance, application fit, and explicitly qualified replacement analysis. It also distinguishes confirmed specifications from parameters that still require direct confirmation from the manufacturer datasheet, reducing the risk of an invalid engineering assumption.
直接替换替代料： W78I052DDG ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： W78I052DDG （相同外形与封装尺寸） ——差异在于 Architecture, Flash Memory, Operating Temperature Range, Package.
W78I051DDG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
W78I053DDG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
W78I054DDG
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →W78I055DDG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
W78I056DDG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
W78I052DDG 最大额定值与电气特性
| Product Type | 8-bit embedded microcontroller |
| Architecture | Enhanced 8051-compatible 8-bit architecture |
| Flash Memory | 8 KB |
| Operating Supply Voltage Range | 2.4 V to 5.5 V |
| 工作温度范围 | -40°C to +85°C |
| 封装 | 40-DIP |
| 安装方式 | Through-hole |
| Lead-Free Status | Pb-free |
| Program Memory Type | Flash |
W78I052DDG 40-dip 引脚配置指南
W78I052DDG（40-dip 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： W78I052DDG.
请参阅 数据手册 以查看完整引脚配置。
典型应用
W78I052DDG 适用于 6 应用s: Appliance Control, Industrial Sequencer, Access Control Terminal, Instrumentation Interface, Lighting and Relay Control, Battery-Powered Sensor Node.
Appliance Control
The W78I052DDG fits appliance-control boards that require an economical 8-bit controller, 8KB Flash, and operation from 2.4 V to 5.5 V. It can execute a compact state machine for user inputs, relays, indicators, motors, and safety interlocks while operating across the verified -40°C to +85°C range. The 40-DIP package also simplifies repair and assembly in products assembled through holes. Engineers should reserve firmware space for startup checks and fault handling, then verify each peripheral's timing and pin assignment against the manufacturer datasheet before release.
推荐
Industrial Sequencer
The W78I052DDG is appropriate for small industrial sequencers where the required logic is deterministic and 8KB of Flash is sufficient for state tables, interlocks, counters, and operator I/O. Its 2.4 V to 5.5 V supply range supports low-voltage embedded systems, while the -40°C to +85°C specification covers many indoor industrial environments. The 40-DIP package makes the controller practical for legacy-style control boards and serviceable assemblies. Confirm electrical noise tolerance, isolation requirements, watchdog behavior, and I/O drive limits in the full datasheet.
推荐
Access Control Terminal
The W78I052DDG can serve as the controller in a compact access-control terminal when the product needs credential-state handling, keypad scanning, status indication, and communication-driver firmware rather than high-end computation. Its 8KB Flash provides space for a compact embedded program, and the 2.4 V to 5.5 V operating range can simplify integration with low-voltage peripherals. The 40-DIP package supports through-hole boards common in durable terminal designs. Security-critical designs require additional review of programming access, lockout behavior, communications integrity, and tamper-response requirements.
推荐
Instrumentation Interface
The W78I052DDG is suitable for basic instrumentation interfaces that translate switch states, sensor levels, and front-panel commands into a controlled embedded system. An 8-bit core and 8KB Flash are generally adequate for measurement sequencing, calibration constants, local status, and compact communications, while the 2.4 V to 5.5 V range permits integration with common embedded rails. The 40-DIP package is practical for low-volume instruments and serviceable boards. Validate analog tolerances, reference stability, and communication timing before using the controller for safety-critical readings.
推荐
Lighting and Relay Control
The W78I052DDG can control relays, lamps, indicators, and other discrete loads in lighting panels or building-control modules. Its 8KB Flash is sufficient for timers, schedules, operating modes, fault counters, and basic user commands, while the 8-bit architecture keeps the control loop economical. The verified 2.4 V to 5.5 V range allows operation from common low-voltage rails and the -40°C to +85°C range supports many indoor products. Use suitable driver transistors, isolation, flyback protection, and safety-rated components rather than driving loads directly from MCU pins.
推荐
Battery-Powered Sensor Node
The W78I052DDG can serve as the supervisory controller in a low-power sensor node when the node performs occasional sampling, local filtering, status reporting, and sleep-mode management. The 2.4 V to 5.5 V operating range covers several common low-energy rail options, while the compact 8KB Flash budget favors firmware focused on measurement orchestration and communications. The 40-DIP package is useful for prototypes and serviceable modules. Validate quiescent current, sleep-mode wake behavior, analog sensor accuracy, and battery lifetime because those values are not confirmed in the supplied excerpts.
推荐
推荐产品汇总
工程参考数据： W78I052DDG ——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 | W78I051DDG | W78I053DDG | W78I054DDG | W78I055DDG | W78I056DDG |
|---|---|---|---|---|---|---|
| Package | 40-DIP | 40-DIP | 40-DIP | 40-DIP | 40-DIP | 40-DIP |
| Brand | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation |
| Product Type | 8-bit embedded microcontroller | 8-bit embedded microcontroller | 8-bit embedded microcontroller | 8-bit embedded microcontroller | 8-bit embedded microcontroller | 8-bit embedded microcontroller |
关键差异点
- Through-hole integration in a 40-DIP package （对比 ATMEGA328P-MNR)
- Established enhanced 8051-compatible software target （对比 W78E052DDG)
- Compact 8KB Flash configuration （对比 W78I051DDG)
设计说明
Do not approve a replacement solely from the W78I05x family name. The verified data confirms the target's 8KB Flash and 40-DIP package, but it does not expose complete candidate pin tables. Verify supply pins, ground pins, reset, oscillator, programming signals, every used I/O, timer inputs, and interrupt assignments against the exact candidate datasheet. Although all listed alternatives use the 40-DIP footprint, footprint equality alone does not guarantee electrical or firmware compatibility.
The W78I052DDG operates across 2.4 V to 5.5 V, so the power architecture must keep every connected device within its own valid range. Confirm the minimum and maximum operating voltage from the manufacturer datasheet and include appropriate local bypass capacitance at the supply pins. External sensors, transceivers, and actuators may require level translation or separate rails. The supplied excerpts do not provide current consumption or regulator dropout data, so those values must not be inferred.
The 40-DIP footprint supports straightforward through-hole routing, but it does not eliminate good analog and digital layout practice. Place the MCU away from relay contacts, mains-derived nodes, and high-current switching paths; return switching currents through a controlled path rather than through signal-ground areas. Verify oscillator placement, programming access, reset behavior, and decoupling directly from the manufacturer application guidance before releasing the PCB.
Use the package-specific power dissipation and maximum junction-temperature limits from the Nuvoton datasheet rather than assuming that a DIP package can dissipate unrestricted power. Calculate worst-case internal dissipation from the actual supply voltage, I/O loading, clock configuration, and ambient temperature. Where dissipation is significant, use copper area, airflow, or a heat sink and maintain adequate clearance from temperature-sensitive components.
合规信息
The verified Mouser listing explicitly states Pb-free. The supplied excerpts mention lead-free parts information in the datasheet search result, but they do not provide a complete RoHS, REACH, halogen-free, conflict-minerals, or automotive-qualification declaration for the exact W78I052DDG suffix.
