W78E516DLG - 40MHz 8-bit 8052 MCU, 64KB Flash | Nuvoton
料号： W78E516DLG ✓ 量产中W78E516DLG 概述
An 8051-compatible microcontroller is a specialized microcontroller architecture designed around an 8-bit accumulator and register-based instruction set. In the broader hierarchy, it belongs to the 8-bit MCU, embedded controller, and semiconductor categories. The W78E516DLG targets applications that benefit from broad software compatibility, deterministic embedded control, and a compact surface-mount footprint rather than the larger peripheral set or higher processing bandwidth of a 32-bit MCU.
The principal device characteristics include 64KB of Flash memory, a 40MHz operating frequency, an 8-bit CPU, and operation from 2.4V to 5.5V. The LQFP-48 package provides 48 external leads for its processor, memory, clock, reset, interrupt, and I/O functions. Its stated Pb-free construction is important for lead-free manufacturing environments, while its 2.4V minimum operating voltage allows the device to be used with both 3.3V and conventional 5V embedded systems, subject to individual peripheral and timing requirements.
The W78 series uses an enhanced 6T/12T 8051-compatible architecture, as described by Nuvoton for the W78E516D family. This compatibility is significant when maintaining or porting an existing 8051 codebase: developers can preserve peripheral-oriented software organization and familiar development conventions while using a 64KB Flash implementation. The supplied verified results identify the W78E516DLG specifically as a 64K x 8 Flash device based on the 8052 architecture, but do not provide detailed register, timing, or memory-access values.
Typical uses include industrial control panels, appliance controllers, building equipment, legacy peripheral emulators, and embedded products that began life around an 8051-compatible architecture. A 40MHz clock provides additional timing headroom for interrupt-driven control and communication routines, while 64KB of Flash is useful for moderate firmware images. Designers migrating from a slower discrete 8051 design should still verify peripheral mapping, memory timing, oscillator requirements, and pin-level board compatibility before production release.
The primary design consideration is compatibility with the existing board and firmware rather than maximum general-purpose performance. Confirm the exact 48-pin LQFP pin assignment, supply sequencing, reset behavior, oscillator configuration, and peripheral multiplexing against the manufacturer datasheet before layout signoff. Because only summarized distributor and manufacturer-page data were supplied here, detailed RAM size, timer counts, serial-interface configuration, maximum I/O current, and absolute temperature limits remain datasheet-verification items.
This page consolidates the verified W78E516DLG specifications, package information, sourcing links, and application guidance into an engineer-oriented product record. It also distinguishes verified values from unavailable technical fields, making it easier to identify the exact datasheet information still required before schematic capture, PCB layout, firmware porting, or component substitution.
直接替换替代料： W78E516DLG ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料W78E516DLG 最大额定值与电气特性
| Microcontroller Type | 8-bit 8051/8052-compatible Flash microcontroller |
| CPU Architecture | 8051-compatible |
| 最大时钟频率 | 40 MHz |
| Flash Memory | 64KB (64K x 8) |
| Operating Voltage Range | 2.4V to 5.5V |
| Nominal Supply Voltage | 3.3V |
| 封装 | 48-pin LQFP |
| 安装类型 | Surface Mount |
| Lead-Free Status | Pb-free |
| Product Series | W78 series |
| Core Architecture | 6T/12T 8051-compatible W78E516D family architecture |
| Program Memory Type | Flash |
| 工作温度范围 | -40C to +70C |
| 数据总线宽度 | 8-bit |
W78E516DLG 48-pin lqfp 引脚配置指南
W78E516DLG（48-pin lqfp 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： W78E516DLG.
请参阅 数据手册 以查看完整引脚配置。
典型应用
W78E516DLG 适用于 6 应用s: Industrial Control Panels, Appliance Controllers, Building Equipment Interfaces, Legacy Peripheral Emulation, Data Acquisition Front Ends, Communication Gateways.
Industrial Control Panels
The W78E516DLG fits industrial control panels that retain 8051-family firmware but require 64KB of Flash and additional timing margin from a 40MHz clock. Its 8-bit processor can coordinate switches, indicators, interlocks, and routine sensor acquisition where the workload does not justify a more complex MCU. The 2.4V to 5.5V operating range also supports 3.3V and 5V control electronics. Before schematic release, engineers should verify the exact peripheral mapping, interrupt behavior, I/O levels, and pin assignments in the 48-LQFP datasheet because those details were not present in the supplied summaries.
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Appliance Controllers
The W78E516DLG is appropriate for appliance controllers that combine a conventional 8051-compatible software base with a compact 48-pin LQFP implementation. Its 64KB Flash provides room for a moderate control program, while the 40MHz maximum clock supports interrupt-driven motor, relay, display, and keypad routines. Operation from 2.4V to 5.5V enables integration with common embedded supply levels. Engineers should confirm oscillator requirements, reset behavior, timer channels, and output-drive capabilities directly from the manufacturer documentation before treating the MCU as a production drop-in for an older appliance board.
推荐
Building Equipment Interfaces
The W78E516DLG can serve as the embedded controller in building equipment interfaces because it combines an 8-bit CPU, 64KB Flash, and operation from 2.4V to 5.5V in a compact LQFP package. A product built around this device can translate panel inputs, manage relays or actuators, and maintain local diagnostic logic. The supplied listing indicates operation from -40C to +70C, which supports many indoor environmental requirements. Qualification should still include transient immunity, long-term availability, watchdog behavior, brownout response, and the manufacturer limits for exposed thermal-pad connections.
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Legacy Peripheral Emulation
The W78E516DLG is a strong candidate for legacy 8052 peripheral emulation because it preserves the familiar instruction-set architecture while providing 64KB of Flash and operation up to 40MHz. This allows legacy control algorithms to remain recognizable while newer boards use a compact surface-mount package. The migration remains hardware-specific: validate every port pin, memory address, timer register, interrupt vector, and external bus timing arrangement against the original design and the Nuvoton W78E516D documentation before production use.
推荐
Data Acquisition Front Ends
The W78E516DLG can support moderate data-acquisition front ends where an 8-bit controller samples discrete inputs, performs local filtering, and forwards results over a serial link. Its 40MHz maximum clock provides processing margin, and 64KB Flash is sufficient for moderate firmware sizes. The device is not characterized here for a specific analog interface, so designers must confirm ADC availability, comparator behavior, timing, and channel counts in the full datasheet. External converters or sensor interfaces may be required if the MCU does not provide the needed analog resources.
推荐
Communication Gateways
The W78E516DLG is applicable to simple embedded communication gateways that translate local serial or discrete signals and retain an established 8051 software architecture. Its 64KB Flash and 40MHz clock are useful for protocol framing, buffering, and status reporting, while the 48-LQFP package supports compact board layouts. A gateway design must verify the number and electrical characteristics of UARTs, whether an external PHY is required, and the behavior of unused pins. The exact interface capabilities were not available in the supplied verified summaries and therefore must be confirmed before component selection.
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推荐产品汇总
工程参考数据： W78E516DLG ——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 |
|---|---|
| Package | 48-pin LQFP |
| Brand | Nuvoton Technology Corporation |
| CPU Architecture | 8-bit 8051/8052-compatible |
| Maximum Clock Frequency | 40 MHz |
| Flash Memory | 64KB (64K x 8) |
| Operating Voltage Range | 2.4V to 5.5V |
| Data Bus Width | 8-bit |
| Program Memory Type | Flash |
| Lead-Free Status | Pb-free |
关键差异点
- 64KB Flash configuration （对比 No verified drop-in alternative)
- 40MHz operating speed （对比 No verified drop-in alternative)
- Wide 2.4V to 5.5V supply range （对比 No verified drop-in alternative)
- 48-pin LQFP integration （对比 No verified drop-in alternative)
设计说明
Base the footprint on the manufacturer's 48-pin LQFP drawing and land pattern rather than a generic LQFP library. Verify pin-1 orientation, exposed-pad requirements, pad dimensions, and solder mask settings before PCB release. If the package includes an exposed thermal pad, confirm whether it must be connected to ground, electrically floated, or otherwise treated according to the exact datasheet and assembly process.
Design the supply path for the stated 2.4V to 5.5V operating range, but use the exact minimum and maximum voltage conditions from the manufacturer datasheet for each clock mode. Place required input and decoupling capacitors close to the supply and ground pins with a low-impedance return path. Check brownout, power-on reset, and clock-startup behavior because these details were not included in the supplied distributor summaries.
Keep the oscillator loop compact and away from switching-node copper, relays, inductors, and high-current return paths. Route unused inputs to a defined electrical state according to the datasheet, and provide a clean ground reference for communication and analog-adjacent functions. Validate the final layout for oscillator startup, signal integrity, and any externally exposed I/O protection requirements.
Do not assume that every 8051-family MCU is a drop-in replacement for W78E516DLG. The W78E516D family is described as configurable and pin-compatible with traditional 12T 8051 devices, but specific package variants, memory maps, timing, peripherals, and startup behavior still require comparison. Obtain the exact ordering table and pin table, then recompile and test critical firmware when moving between MCU families or package options.
合规信息
The verified Mouser listing identifies W78E516DLG as Pb-free. No explicit RoHS, REACH, halogen-free, conflict-minerals, or AEC-Q100 statements were included in the supplied data, so those fields remain unknown or not applicable rather than being inferred.