W78E052DDG - 40MHz 8-bit 8051 MCU | Nuvoton
部品番号: W78E052DDG ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1.6022 | $1.60 |
| 10 | $1.6022 | $16.02 |
| 100 | $1.6022 | $160.22 |
| 500 | $1.6022 | $801.10 |
| 1,000 | $1.6022 | $1,602.20 |
W78E052DDG 概要
An 8051-compatible microcontroller is an embedded controller that executes instruction sets designed around the established 8051 architecture while extending it with modern flash memory and configurable peripheral resources. Within the product hierarchy, this device is a microcontroller, an embedded processing IC, and ultimately a semiconductor. Nuvoton describes the W78E052D family as a 6T/12T architecture configurable for compatibility with traditional 12T 8051 designs.
Verified distinguishing features include an operating frequency of up to 40 MHz, 8 KB of 8K × 8 flash program memory, 256 × 8 RAM, and 36 general-purpose I/O lines. The 40-DIP package supports through-hole PCB assembly and is convenient for prototypes, legacy industrial controls, alarm systems, bar-code readers, KVM equipment, key phones, user interfaces, and IPC products. A single full-duplex UART is also identified for serial communications.
The W78E052D family combines a 6T/12T selectable machine cycle with flash memory and a broad supply range. Faster 6T operation can reduce instruction-cycle timing compared with traditional 12T execution, while 12T compatibility helps preserve behavior expected by established 8051 designs. Designers must still verify oscillator, reset, timing, peripheral, and software assumptions against the manufacturer documentation before replacing an existing design.
A through-hole DIP-40 MCU is most appropriate where manual assembly, socketed prototypes, repairability, or stable industrial availability matter more than minimum PCB area. The DIP package exposes 36 I/O pins alongside control and power functions, allowing substantial parallel digital connectivity but requiring careful planning for board height and connector clearance.
The primary engineering trade-off is lifecycle status: Nuvoton marks the W78E052D family Not Recommended for New Designs. Existing supported programs may continue using available stock, but new designs should first evaluate the W78E054D or another currently recommended MCU and perform a complete software, electrical, and package migration review.
This page consolidates distributor pricing, lifecycle information, application context, verified specifications, and drop-in assessment data that are distributed across manufacturer and distributor pages. Engineering decisions should remain anchored to the manufacturer datasheet rather than distributor summaries alone.
ドロップイン代替品: W78E052DDG — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: W78E052DDG （同一形状・フットプリント） — 相違点: Maximum Clock Frequency, Mounting Type, Package, UART.
クイック比較ツール — 並列比較する代替部品を選択:
W78E52B-40
✅ ドロップイン📋 参考代替品（カタログ未掲載）
W78E052DDG 最大定格＆電気的特性
| Microcontroller Type | 8-bit 8051-compatible CISC microcontroller |
| 最大クロック周波数 | 40 MHz |
| Program Memory | 8 KB flash (8K × 8) |
| RAM | 256 bytes (256 × 8) |
| Number of I/O Pins | 36 pins |
| Operating Voltage Range | 2.4 V to 5.5 V |
| Mouser Temperature Grade | -40°C to 70°C |
| W78E052D Family Temperature Range | -40°C to 85°C |
| パッケージ | 40-pin DIP |
| 実装タイプ | Through-hole |
| Architecture | 6T/12T configurable 8051 |
| UART | 1 full-duplex UART |
| Lead-Free Status | Pb-free |
| ライフサイクル状態 | Not Recommended for New Designs |
W78E052DDG 40-pin dip ピン配置ガイド
W78E052DDG (40-pin dip パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: W78E052DDG.
詳細は データシート をご参照ください。
主な用途
W78E052DDG の用途: 6 件s: Security and Alarm Control, Bar-Code Reader Interface, KVM Peripheral Control, Key Telephone Control, Industrial User Interface, IPC Management Controller.
Security and Alarm Control
The W78E052DDG fits legacy security and alarm controllers because the W78E052D family combines an 8051-compatible 6T/12T architecture with 36 I/O lines and one full-duplex UART. Those resources can support keypad inputs, status indicators, relay-control outputs, and a serial communications link without requiring a larger processor. Its verified 8 KB flash and 256 bytes of RAM provide room for a focused control program rather than a connected high-end embedded platform. In an existing design, the 40-pin DIP package allows socketed replacement or through-hole maintenance. Because the family is NRND, new deployment should receive a documented lifecycle exception and a migration plan rather than being approved solely by feature fit.
おすすめ
Bar-Code Reader Interface
The W78E052DDG is suitable for a compact bar-code-reader interface where an 8-bit controller must coordinate inputs, indicators, and a serial scanner. Its 36 I/O lines offer ample parallel signal capacity, while the verified full-duplex UART can connect a scanner or host using an established serial protocol. The 8 KB flash accommodates application code, and 256 bytes of RAM is practical for short frame buffers and state-machine control. For a legacy DIP40 board, keeping the processor package and firmware architecture stable can simplify repair. Any redesign should account for scan timing, signal conditioning, UART logic levels, and the product's NRND lifecycle instead of assuming a modern MCU can be substituted without timing review.
おすすめ
KVM Peripheral Control
The W78E052DDG can support a keyboard-video-monitor peripheral controller when the design is centered on low-bandwidth command handling. Its 8-bit CISC architecture suits finite-state machine control, while 36 I/O lines provide connections for switches, indicators, and control signals. The verified full-duplex UART offers a path for console or host communication, and 8 KB of flash is sufficient when firmware is tightly structured. Its 40-pin through-hole package is especially convenient for established KVM controller boards and service assemblies. Before using the MCU in a new KVM platform, verify timing against required display or USB-side interfaces and consider a recommended MCU because the W78E052D family remains NRND.
おすすめ
Key Telephone Control
The W78E052DDG fits a legacy key-phone controller that must combine user keys, call-state indicators, and serial or auxiliary signaling. Its 36 I/O lines can distribute discrete control functions, while the 8051-compatible 6T/12T architecture supports the register and timing conventions familiar to existing communications firmware. The verified 8 KB flash stores a focused telephone-control application, and the 256-byte RAM supports transient call and keypad state. The DIP40 format can simplify repair of socketed industrial or institutional equipment. A modern implementation should revalidate oscillator tolerance, reset behavior, UART baud-rate handling, and electrical levels before reuse; market availability alone is not a lifecycle justification.
おすすめ
Industrial User Interface
The W78E052DDG is applicable to a compact industrial user-interface controller where discrete buttons, LEDs, and a serial console are more important than graphics acceleration. Its 36 I/O lines support multiple front-panel inputs and outputs, and the verified full-duplex UART can report status or accept configuration commands. The 8-bit architecture and 8 KB flash favor a deterministic state machine rather than a rich graphical workload. A DIP40 board may also facilitate replacement in established production equipment. For machinery deployment, engineers should add appropriate isolation and protection beyond the MCU pins, verify environmental requirements for the individual ordering code, and document a transition plan because the family is Not Recommended for New Designs.
おすすめ
IPC Management Controller
The W78E052DDG can serve as a supervisory MCU in a legacy industrial PC or IPC subsystem when the task consists of monitoring discrete signals and communicating over a serial link. Its 36 I/O lines allow fan, power, alarm, and reset-status integration, while the full-duplex UART supports a management host. The 8 KB flash is appropriate for compact firmware, and the DIP40 package makes replacement straightforward in service-friendly equipment. Because it is an 8-bit MCU rather than a processor, it should not handle multimedia workloads; it is limited to peripheral management. Any new IPC design should review watchdog behavior, fail-safe states, isolation, and lifecycle migration to a currently recommended controller.
おすすめ
エンジニアリング参考データ: W78E052DDG — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | W78E52B-40 |
|---|---|---|
| Package | 40-pin DIP | 40-pin DIP |
| Brand | Nuvoton Technology Corporation | Nuvoton Technology Corporation |
主な差別化要因
- Verified legacy control resources （vs W78E52B-40)
- Explicit Nuvoton family lifecycle evidence （vs W78E52B-40)
- Distributor availability visibility （vs W78E52B-40)
設計ノート
Do not treat the family statement that W78E052D is compatible with traditional 12T 8051 designs as proof that W78E52B-40 is drop-in equivalent. Compare all 40 DIP pins, memory organization, oscillator requirements, reset behavior, UART functions, and peripheral multiplexing against the target schematic. The supplied cross-reference only calls W78E52B-40 an equivalent and provides no quantified differences. Prototype and firmware validation are required before using it in production.
The verified operating range is 2.4 V to 5.5 V, but the excerpts do not provide detailed current limits, rise-time limits, or I/O injection values. Select supply decoupling and input levels from the manufacturer datasheet, account for DIP pins used by programming or reset functions, and keep all rails within absolute maximum conditions. Temperature requirements also require an ordering-code-level check because Mouser reports -40°C to 70°C while the broader Nuvoton family page states -40°C to 85°C.
A DIP40 controller emphasizes through-hole serviceability rather than compact board area. Position the device away from tall components and provide mechanical clearance around its socket or solder joints. Route oscillator and reset-related nets according to the manufacturer guidance, keep switching or high-current paths separate from sensitive control inputs, and verify every footprint pin number against the datasheet before releasing artwork because the complete pin table was not included in the supplied excerpts.
The W78E052D family is NRND, so purchasing risk should be managed as actively as electrical risk. Freeze the exact ordering code and approved source, record date codes and traceability, inspect markings and authenticity on receipt, and monitor remaining authorized inventory. Avoid creating a new long-lived product around the part without an exception, a second source, and a funded migration. A low current price of $1.6022 does not compensate for an unplanned late-life shortage.
コンプライアンス情報
Mouser identifies W78E052DDG as Pb-free. The supplied verified data does not explicitly establish RoHS, REACH, AEC-Q100, halogen-free, or conflict-minerals status.
