W78E058DFG - 8-Bit 40MHz 32KB Flash MCU | Nuvoton
料号： W78E058DFG ✓ 量产中W78E058DFG 概述
An 8-bit microcontroller is a compact embedded processor designed to execute firmware that senses inputs, controls outputs, and manages communication or timing tasks. The W78E058DFG belongs to the W78 8051-family hierarchy, where the 8052 CPU combines an 8-bit CISC architecture with integrated program memory, RAM, and peripheral functions. This places it between general-purpose microcontrollers and simple fixed-function controllers for designs requiring flexible firmware-based behavior.
The primary verified features are 32 KB of flash program memory, 512 bytes of internal RAM, a 40 MHz operating speed, 36 I/O pins, and a 2.4 V to 5.5 V supply range. Its 44-pin PQFP form factor supports conventional leaded-board assembly and provides more connection positions than smaller 8-bit packages. The W78E058D family is also described by Nuvoton as configurable and pin-compatible with traditional 12T 8051 designs, making the device relevant to legacy 8051 board upgrades when the electrical and peripheral requirements are matched.
The W78E058D family uses an 80C51-compatible CISC architecture. Program storage in flash supports firmware revision and configuration tasks that are more difficult with mask-programmed devices, while 512 bytes of RAM support working variables, stack operations, and small data buffers. A 40 MHz clock rating provides additional timing headroom for multi-step serial communication, control loops, and periodic peripheral servicing, although actual throughput depends on the instruction mix and firmware implementation.
Typical application areas include industrial controllers, connected sensing equipment, compact automation controllers, motor-control interfaces, utility or product metering, and embedded IoT nodes. The 36 available I/O positions are particularly useful when a system needs discrete sensing and actuator connections in addition to its serial interfaces. Firmware and peripheral configuration should be checked against the selected W78E058D package variant before design release.
For hardware design, use the 44-pin PQFP land pattern, validate the selected oscillator and reset implementation against the manufacturer datasheet, and place bypass capacitors close to the supply pins. The permitted operating range of 2.4 V to 5.5 V must also be checked for every attached peripheral and communication device. The supplied search results do not expose the complete pin map, so pin assignments should not be inferred from generic 8051 diagrams without cross-checking the official data.
直接替换替代料： W78E058DFG ——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W78E058DFG 最大额定值与电气特性
| Microcontroller Type | 8-bit 8052-compatible W78 microcontroller |
| CPU Architecture | 80C51-compatible CISC |
| 最大时钟频率 | 40 MHz |
| Program Memory Size | 32 KB (32K x 8) flash |
| RAM Size | 512 bytes (512 x 8) |
| Operating Supply Voltage Range | 2.4 V to 5.5 V |
| Number of I/O Pins | 36 |
| 封装 | 44-pin PQFP |
| 工作温度范围 | -40 °C to 85 °C |
| Lead-Free Status | Pb-free |
W78E058DFG 44-pin pqfp 引脚配置指南
W78E058DFG（44-pin pqfp 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： W78E058DFG.
请参阅 数据手册 以查看完整引脚配置。
典型应用
W78E058DFG 适用于 6 应用s: Industrial Embedded Controllers, Industrial IoT Sensor Nodes, Metering and Data Acquisition, Motor Control and Actuator Interfaces, Embedded Automation Equipment, Low-Power Control Boards.
Industrial Embedded Controllers
The W78E058DFG fits compact industrial controllers that require deterministic firmware execution, moderate program storage, and numerous discrete connections. Its verified 32 KB flash accommodates control logic, configuration handling, and firmware revisions, while 36 I/O pins provide ample connections for discrete inputs, outputs, status indicators, and actuator interfaces. The 40 MHz clock rating also leaves timing headroom for periodic scanning, protocol servicing, and supervisory tasks. The 2.4 V to 5.5 V operating range supports designs built around multiple common supply levels. Engineers should still confirm interrupt allocation, timer resources, communication peripherals, and the exact pin functions in the official Nuvoton data sheet before assigning every board signal.
推荐
Industrial IoT Sensor Nodes
The W78E058DFG is suitable for compact IoT sensor nodes that combine local sensing, state-machine logic, and serial data reporting. Its 512 bytes of RAM support working data, while 32 KB of flash can hold application firmware, calibration data, and communication routines. The 36 available I/O pins support multiple discrete sensors, local alarms, indicators, and interface signals without requiring a large external I/O expander. Operating from 2.4 V to 5.5 V provides useful supply flexibility in mixed-voltage equipment. For low-power operation, developers should verify sleep modes, wake sources, oscillator startup behavior, and peripheral shutdown settings, because these details are not included in the supplied search excerpts.
推荐
Metering and Data Acquisition
The W78E058DFG can serve as the control processor in metering and compact data-acquisition equipment where measurements must be converted into local calculations or transmitted records. A 40 MHz maximum clock provides useful throughput for sampling coordination, filtering, calibration-table access, and communication framing, while 32 KB flash is sufficient for embedded firmware and configuration storage. Its 36 I/O pins allow sensor inputs, capture signals, displays, and communications peripherals to share a controlled platform. Because the verified snippets do not specify ADC resolution, sampling channels, or serial interfaces, analog and digital acquisition designs must confirm those resources directly from the W78E058D data sheet rather than inferring them from the generic 8052 designation.
推荐
Motor Control and Actuator Interfaces
The W78E058DFG is relevant to small motor-control and actuator-interface modules because it combines 36 I/O pins with a 40 MHz clock and 32 KB of programmable flash. Engineers can use the I/O capacity for control signals, fault inputs, interlocks, and external driver coordination while firmware manages sequencing and protection. Its 2.4 V to 5.5 V operating range can simplify support for industrial and embedded control boards, although motor-interface levels normally require suitable buffers or drivers. The device must not be assumed to contain a dedicated motor-control timer or advanced-control peripheral because those details are absent from the supplied data. Verify PWM channels, capture inputs, fault handling, and timing limits against the official data sheet.
推荐
Embedded Automation Equipment
The W78E058DFG can act as the central controller in embedded automation equipment such as sequencers, small machinery controllers, and auxiliary automation modules. Its flash memory supports field-reconfigurable operating logic, and its 36 I/O pins can distribute connections among sensors, relays, indicators, and communications circuits. The 40 MHz rating provides additional instruction throughput for state machines and multi-protocol routines, while the wide 2.4 V to 5.5 V range supports varied industrial board architectures. Safety-related designs must evaluate watchdog behavior, brownout handling, reset sources, and fault containment separately. These protections, along with timer and communication resources, should be confirmed from the manufacturer data sheet before the MCU is approved for machinery control.
推荐
Low-Power Control Boards
The W78E058DFG is applicable to low-power embedded control boards that need local decision-making without adopting a higher-bit processor. Its 512 bytes of RAM supports compact working sets, while 32 KB of flash provides room for dedicated control and update code. The 36 I/O pins permit direct sensing and actuation, reducing the need for additional interface components in suitable designs. Its 2.4 V minimum supply voltage also allows operation from low-voltage rails, but actual energy use depends on clock selection, active versus sleep mode behavior, peripheral loading, and board leakage. Those parameters are not present in the verified excerpts and must be reviewed in the official documentation before making battery-life claims or selecting a power-management topology.
推荐
推荐产品汇总
工程参考数据： W78E058DFG ——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 | W78E058DDG | W78E054DPG | W78E052DFG |
|---|---|---|---|---|
| Brand | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation |
关键差异点
- Documented 40 MHz maximum operating speed （对比 W78E052DFG)
- 32 KB of flash program memory （对比 W78E054DPG)
- 36 I/O pins in a 44-pin PQFP （对比 W78E058DDG)
设计说明
Use the official 44-pin PQFP DFG land pattern rather than a generic 44-pin footprint. Place the device so every pin remains accessible for inspection and assembly, and verify pin-one orientation against the manufacturer drawing. Because the supplied excerpts do not expose the complete pin map, do not derive VDD, VSS, reset, oscillator, programming, or I/O assignments from a generic 8051 symbol. Confirm those connections and the exposed programming interface directly against the Nuvoton W78E058D data sheet.
Design the supply network for the verified 2.4 V to 5.5 V operating range and place the required bypass capacitors close to the device's supply and ground pins. Check regulator tolerance, startup ramps, and brownout behavior against the actual board conditions. The verified material does not identify the number and value of bypass capacitors or the internal power architecture, so use the manufacturer recommended circuit rather than copying values from an unrelated 8051 design.
Separate clock, programming, and communication routing from sensitive analog or high-speed switching nodes, and provide a quiet ground return for the MCU. Keep oscillator routing short and follow the manufacturer's grounding and decoupling recommendations. If the W78E058DFG drives relays, solenoids, lamps, or motor interfaces, route those outputs away from the controller and include suitable protection. The exact internal oscillator and I/O topology remain undocumented in the supplied snippets and should be resolved from the official data sheet.
合规信息
The verified Mouser listing identifies W78E058DFG as Pb-free. No verified RoHS, REACH, halogen-free, conflict-minerals, or AEC-Q100 declaration was supplied.
