W78E058DDG - 8-Bit 40MHz 32KB Flash MCU | Nuvoton | DIP-40
MPN： W78E058DDG ✓ 啟用中W78E058DDG 概覽
An 8051-compatible microcontroller is an embedded-processing IC built around the classic 8051 core architecture. It combines a CPU, program memory, data memory, parallel I/O, timers, serial communication functions, and interrupt support on one device. The W78E058 series extends that established platform with on-chip flash rather than relying on an external program-memory device. Within the semiconductor hierarchy, this part belongs to the microcontroller class and the more specific 8-bit embedded-controller category.
The principal features include 32 KB (32K × 8) flash, 512 × 8 bits of RAM, 36 I/O pins, and a maximum stated operating frequency of 40 MHz. The 2.4 V to 5.5 V operating range permits use in 2.5 V, 3.3 V, and 5 V equipment. According to the manufacturer W78E058D product information, the family is configurable and pin-compatible with traditional 12-transistor 8051 devices, while package options include DIP40. The selected W78E058DDG ordering code corresponds to the 40-pin DIP configuration.
Internally, the MCU follows the CISC-oriented 8051 execution model and uses a W78 core with integrated flash program storage. The 40 MHz clock rating provides substantially more timing headroom than traditional 12 MHz-class 8051 implementations, supporting faster peripheral operation and more demanding control loops. Because interrupt-driven and polling architectures remain central to 8051 designs, existing toolchains and software practices can often be adapted, although the W78E058D documentation must be consulted for peripheral behavior and clock requirements.
Typical uses include industrial controller boards, appliance control panels, keyboard and human-interface modules, programmable timers, data-acquisition controllers, and legacy peripheral upgrades. The 36 available I/O pins are especially useful when a system needs multiple digital inputs and outputs around a single controller. For designs requiring more analog functions, communication nodes, or compact surface-mount packaging, a different microcontroller family may provide a better integration level.
When designing a PCB around the W78E058DDG, preserve the documented 40-pin DIP footprint and provide suitable bypass capacitance at the power pins. Validate oscillator timing, reset behavior, and I/O drive limits against the manufacturer datasheet before production. Migration from a conventional EPROM-based 8051 should also include checks for flash-specific programming, erase, and code-execution behavior.
This product page consolidates verified distributor specifications, manufacturer family information, package constraints, and practical design guidance. It also distinguishes a genuine 40-pin drop-in option from candidates whose memory, speed, or package differences require schematic and firmware verification before substitution.
直接替換替代品，適用於 W78E058DDG — 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。
此系列的變體
與下列產品可直接替換的同系列型號： W78E058DDG （相同外形與佔位） — 差異在於 Program Memory Size, RAM Size, Architecture, Microcontroller Type, Operating Temperature.
W78E054C40DL
✅ 直接替換📋 參考替代品（不在目錄中）
W78E052B40DL
✅ 直接替換📋 參考替代品（不在目錄中）
W78E052DFG
✅ 直接替換聯絡詢價
查看資料表 →W78E054DPG
✅ 直接替換聯絡詢價
查看資料表 →W78E058DDG 最大額定值與電氣特性
| Microcontroller Type | 8-bit W78 8051-compatible microcontroller |
| Maximum Operating Frequency | 40 MHz |
| Program Memory Size | 32 KB (32K × 8 bits) flash |
| RAM Size | 512 × 8 bits |
| Number of I/O Pins | 36 pins |
| Operating Supply Voltage Range | 2.4 V to 5.5 V |
| Architecture | 8-bit 8051-compatible CISC |
| 封裝 | 40-pin DIP |
| 安裝類型 | Through-hole |
| Core Family | W78 series |
| Core Type | 8051-compatible |
| Program Memory Type | Flash |
| Supported Supply Levels | 2.5 V, 3.3 V, and 5 V |
| 工作溫度範圍 | -40 °C to 85 °C |
| Pin Compatibility | Pin-compatible with traditional 12-transistor 8051 devices |
| Lead-Free Status | Pb-free |
| Datasheet Document Length | 90 pages |
W78E058DDG 40-pin dip 腳位配置指南
W78E058DDG（40-pin dip 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： W78E058DDG.
請參閱 資料表 以查看完整腳位配置。
典型應用
W78E058DDG 適用於 6 應用s: Industrial Embedded Controller, Legacy 8051 Controller Upgrade, Appliance and HVAC Control Panel, Programmable Timer and Sequencer, Data-Acquisition and Interface Controller, Human-Interface and Keypad Controller.
Industrial Embedded Controller
The W78E058DDG fits an industrial embedded controller requiring a 40 MHz 8051-compatible core, 32 KB of on-chip flash, 36 I/O pins, and a 2.4 V to 5.5 V operating range. Its 40-pin DIP package is particularly useful where a through-hole controller board must interface with relays, switches, indicators, and external sensors. The 32 KB program area permits substantially more on-board control logic than a small legacy 8051, while the 512-byte RAM supports state variables and interrupt service routines. Designers should budget I/O expansion carefully because the target provides 36 I/O pins, not 40, and should verify timing margins at the stated 40 MHz clock in the manufacturer documentation.
推薦
Legacy 8051 Controller Upgrade
The W78E058DDG is appropriate when replacing a conventional 12-transistor 8051 assembly while retaining an 8051-oriented software model. Nuvoton states that the W78E058D family is configurable and pin-compatible with traditional 12-transistor 8051 devices, while this ordering option supplies the 40-pin DIP footprint. On-chip 32 KB flash removes the external program-memory requirement and supports firmware consolidation into one controller package. Before production, compare every signal on the legacy schematic, verify the oscillator frequency and reset network, and confirm peripheral register compatibility because a pin-compatible CPU does not guarantee identical timing or interrupt behavior.
推薦
Appliance and HVAC Control Panel
The W78E058DDG can serve as the central controller in an appliance or HVAC panel where discrete inputs, display segments, buttons, buzzer outputs, and relay-control lines must be coordinated. Its 36 I/O pins provide useful parallel-interface capacity, while 32 KB of flash can hold state-machine logic, calibration tables, and communication routines. The 2.4 V to 5.5 V range supports 2.5 V, 3.3 V, and 5 V control environments. Use the 40 MHz rating to shorten control-loop latency, but preserve input debouncing, output isolation, and proper flyback protection for inductive loads rather than driving them directly from unprotected controller pins.
推薦
Programmable Timer and Sequencer
The W78E058DDG is suitable for programmable timing and sequencing equipment because its 8-bit 8051-compatible core can execute deterministic control routines at up to 40 MHz. The 32 KB flash area supports schedules, event tables, and multi-stage sequences, while 36 I/O pins provide trigger, gate, status, and alarm connections. A DIP-40 assembly also simplifies replacement in legacy timer boards and allows socketed prototypes during timing validation. The critical design task is calculating worst-case latency under interrupt load; confirm timer resolution, interrupt latency, and peripheral clocking in the manufacturer datasheet instead of inferring performance solely from the 40 MHz headline frequency.
推薦
Data-Acquisition and Interface Controller
The W78E058DDG can manage digital data acquisition and peripheral-interface tasks that require many parallel signals but do not need a high-end 32-bit processor. Its 36 I/O pins can support digital sensors, status flags, handshake lines, and discrete actuators, while the 32 KB flash region accommodates acquisition sequencing and data-formatting firmware. The 40 MHz clock offers useful processing margin between peripheral events, and the 2.4 V to 5.5 V range simplifies interface design across common embedded rails. For analog measurement channels, add a suitable external converter and isolate the MCU from high-voltage or high-current sensing circuits; the 512-byte RAM is modest and should not be treated as a large capture buffer.
推薦
Human-Interface and Keypad Controller
The W78E058DDG is well matched to keypads, menu panels, and small human-interface modules because a 40 MHz 8051-compatible controller can scan inputs and update indicators with low latency. Its 36 I/O pins allow direct connection to matrix rows, display-control signals, and status LEDs, while 32 KB of flash can store debounce logic, key maps, and display sequences. The DIP-40 package makes the controller practical for socketed development boards and through-hole industrial modules. Because the MCU has only 512 bytes of RAM, keep display buffering and event history compact. Validate active levels and multiplex timing against the verified pinout, and use suitable drivers for high-current displays rather than relying on general-purpose I/O pin drive strength.
推薦
推薦產品摘要
工程參考資料，適用於 W78E058DDG — 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 | W78E054C40DL | W78E052B40DL | W78E052DFG | W78E054DPG |
|---|---|---|---|---|---|
| Package | 40-pin DIP | DIP-40 | DIP-40 | DIP-40 | DIP-40 |
| Brand | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation |
| Microcontroller Type | 8-bit W78 8051-compatible microcontroller | W78E05-series 8-bit microcontroller | W78E05-series 8-bit microcontroller | W78E05-series 8-bit microcontroller | W78E05-series 8-bit microcontroller |
主要差異化特點
- Larger verified flash program area than an unspecified generic legacy 8051 replacement (對比W78E052B40DL)
- Explicit 40 MHz operating rating (對比W78E052DFG)
- 36 I/O pins for parallel interface capacity (對比W78E054DPG)
設計說明
Use the exact 40-pin DIP footprint from the manufacturer mechanical drawing and compare every assigned signal with the verified pin map before layout release. Although the family is described as pin-compatible with traditional 12-transistor 8051 devices, package compatibility alone does not prove peripheral compatibility. Place decoupling capacitors close to the supply pins, provide a clean ground return, and keep high-current switching or inductive loads physically separated from the controller and its analog input circuitry.
Validate oscillator startup, clock amplitude, and peripheral timing at the rated 40 MHz operating point. The 512-byte RAM is modest, so avoid deep interrupt nesting and time-critical tasks that can overflow the 8051 stack. For I/O expansion, respect the electrical characteristics for pin drive, input levels, and port multiplexing in the datasheet. Use pull resistors and buffers where external signals can exceed the controller's voltage range.
Do not treat a related W78E05-series suffix as an automatic functional substitute. Check flash size, RAM, clock, I/O count, voltage range, timers, serial interfaces, interrupt vectors, reset behavior, and package drawing. After replacing a conventional 8051, confirm code-execution and flash-programming requirements with the manufacturer documentation. The available 512-byte RAM also makes efficient allocation and stack budgeting important in interrupt-driven firmware.
合規資訊
The verified Mouser listing identifies the W78E058DDG as Pb-free. No explicit RoHS, REACH, halogen-free, or conflict-minerals declaration was included in the supplied web data. AEC-Q100 status is not stated and is therefore recorded as not applicable to this non-automotive ordering code.
