W78E054DDG - 8-Bit 40MHz 16KB Flash MCU | Nuvoton
MPN： W78E054DDG ✗ 停產W78E054DDG 概覽
An 8-bit microcontroller is a compact embedded-processing IC built around an 8-bit CPU, program memory, data memory, timers, serial interfaces, and digital I/O. The W78E054D belongs to the broader 8051/8052 microcontroller family and combines legacy peripheral compatibility with a wider operating-frequency range. Its selectable 6T or 12T architecture is designed to support traditional 12T 8051-compatible hardware while accommodating higher clock rates.
Principal device characteristics include a 40 MHz maximum operating frequency, 16 KB of Flash program memory, 32 I/O pins, a 2.4 V to 5.5 V supply range, and an external oscillator configuration. Flash memory retains programmed firmware without a removable programmer, while the broad supply-voltage range supports both 3.3 V and 5 V equipment when the associated peripheral and I/O limits are respected.
The W78E054D uses the 8052 processor architecture and provides a conventional register-based embedded-control platform. Nuvoton describes the family as configurable and pin-compatible with traditional 12T 8051 implementations. That compatibility makes migration from an appropriately designed 8051 system possible, although firmware, timing, oscillator, and peripheral behavior should still be verified before production use.
Typical applications include electronic access controls, alarm panels, barcode readers, keyboard-video-mouse equipment, key-phone systems, industrial human-interface panels, and embedded industrial controllers. The 32 available I/O pins are especially useful when a design must combine sensing inputs, relay or actuator outputs, display interfaces, and serial communication without using a larger package.
The principal engineering consideration is that this device has an external oscillator rather than a listed internal oscillator. The clock source, capacitance, startup behavior, and all timing-dependent firmware must therefore be designed for the external clock configuration. Designers should also confirm the exact LQFP-48 pin mapping and the latest Nuvoton datasheet before committing a new PCB.
This product page combines verified distributor pricing, lifecycle information, package characteristics, and application guidance with explicit identification of the remaining pinout and supply-chain details. It also distinguishes confirmed drop-in replacements from related family members that were not verified as exact replacements, helping engineers avoid assumptions based only on similar part numbers.
直接替換替代品，適用於 W78E054DDG — 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。
此產品無可直接替換的替代品。
申請替代品W78E054DDG 最大額定值與電氣特性
| Product Type | 8-bit 8052-compatible microcontroller |
| Maximum Operating Frequency | 40 MHz |
| Program Memory Size | 16 KB Flash (16K x 8) |
| Program Memory Type | Flash |
| Core Processor | 8052 |
| Number of I/O Pins | 32 |
| Operating Supply Voltage Range | 2.4 V to 5.5 V |
| 工作溫度範圍 | -40 °C to +85 °C |
| Oscillator Type | External |
| Architecture | 6T / 12T configurable 8051 MCU |
| 封裝 | LQFP-48 |
| 安裝類型 | Surface Mount |
| 生命週期狀態 | Not Recommended for New Designs (NRND) |
| Target Applications | Security, alarm, barcode reader, KVM, key phone, user interface, IPC |
| Lead-Free Status | Pb-free |
W78E054DDG lqfp-48 腳位配置指南
W78E054DDG（lqfp-48 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： W78E054DDG.
請參閱 資料表 以查看完整腳位配置。
典型應用
W78E054DDG 適用於 6 應用s: Electronic Security and Access Control, Alarm Panel and Security Controller, Barcode Reader and Data Collection, KVM and Human-Interface Controller, Key-Phone and Communication Terminal, Industrial User Interface and Control Panel.
Electronic Security and Access Control
The W78E054DDG fits electronic locks, access-control readers, and alarm panels because its 8052-compatible core and 16 KB of Flash provide enough memory for a dedicated control program, while 32 I/O pins can connect credential inputs, indicators, lock mechanisms, and communication lines. The 2.4 V to 5.5 V operating range also accommodates common embedded rails. Because the family is NRND, engineers should validate the external clock arrangement, confirm legacy peripheral behavior, and plan controlled migration to an active MCU for long-lived security products.
推薦
Alarm Panel and Security Controller
The W78E054DDG is appropriate for alarm panels that combine sensor inputs with local annunciation and actuator outputs. Its 32 I/O pins provide a substantial interface budget for zone monitoring, status LEDs, relay drive, and tamper inputs, while the 40 MHz maximum clock supports time-sensitive control tasks. The 2.4 V to 5.5 V range supports both 3.3 V and 5 V system architectures. Production validation should confirm timing margins, watchdog behavior, clock startup, and all peripheral assignments against the manufacturer datasheet.
推薦
Barcode Reader and Data Collection
The W78E054DDG can serve as the controller in a compact barcode reader where firmware must decode or manage scanner data while coordinating indicators, triggers, and an operator interface. Its 8052 architecture and 16 KB of Flash suit established 8051-based control code, and the 32 I/O pins allow multiple switches, status signals, and serial connections without immediate package expansion. The verified data does not specify RAM or serial peripheral capacities, so barcode-buffer requirements and communications throughput must be checked in the full datasheet before design approval.
推薦
KVM and Human-Interface Controller
The W78E054DDG is well matched to KVM and compact human-interface subsystems that scan buttons, drive indicators, and manage switching functions. Its 32 I/O pins reduce the need for multiple expanders, and 16 KB of Flash accommodates established control firmware without an external program-memory device. The broad 2.4 V to 5.5 V supply range simplifies integration with mixed legacy logic. Designers should verify the external oscillator configuration and exact package pin mapping because the extracted source data does not expose the complete peripheral assignment.
推薦
Key-Phone and Communication Terminal
The W78E054DDG can control key-phone terminals where a dedicated MCU must service keypad inputs, display functions, call-state indicators, and serial communication. Its 8052 compatibility supports migration from established 12T 8051 designs, while 32 I/O pins provide practical interface density and the 2.4 V to 5.5 V range supports common telephone-system electronics. Firmware timing and available RAM must be reviewed carefully because the verified listing confirms Flash memory and I/O count but does not provide the complete RAM and peripheral specification.
推薦
Industrial User Interface and Control Panel
The W78E054DDG supports industrial operator panels that need deterministic digital control, local buttons, indicators, and machine-interface signals. The 40 MHz maximum operating frequency is useful for responsive legacy firmware, and the LQFP-48 package offers 32 I/O pins in a compact surface-mount footprint. Its -40 °C to +85 °C rating covers industrial temperature requirements, but an NRND MCU should be used only where lifecycle risk is accepted. Confirm grounding, I/O levels, clock layout, and watchdog behavior during hardware qualification.
推薦
推薦產品摘要
工程參考資料，適用於 W78E054DDG — 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 |
|---|---|
| Brand | Nuvoton Technology Corporation |
| Package | LQFP-48 |
| Product Type | 8-bit 8052-compatible microcontroller |
| Maximum Frequency | 40 MHz |
| Program Memory | 16 KB Flash |
| Operating Voltage | 2.4 V to 5.5 V |
| Number of I/O Pins | 32 |
| Operating Temperature | -40 °C to +85 °C |
| Oscillator Type | External |
| Lifecycle Status | Not Recommended for New Designs (NRND) |
主要差異化特點
- 40 MHz maximum operating frequency (對比W78E058DDG)
- 16 KB of on-chip Flash program memory (對比W78E054DFG)
- 32 digital I/O pins in a surface-mount package (對比W78E054DFG)
- Wide 2.4 V to 5.5 V operating range (對比W78E058DDG)
設計說明
Route the external clock network and its decoupling or load components according to the Nuvoton datasheet and the selected crystal or clock source. Keep the oscillator path short, away from switching nodes and high-current outputs, and provide a nearby ground return. Because the verified excerpts identify an external oscillator but do not provide the complete clock circuit, copy the manufacturer reference layout rather than improvising capacitor values or oscillator drive levels.
Before releasing the LQFP-48 layout, compare the PCB land pattern against the current Nuvoton package drawing and assign every ball or lead from the complete pin table. Preserve exposed-pad requirements, pad dimensions, solder-mask clearance, and copper treatment exactly as specified. The supplied web excerpts do not include all 48 pin names, so using a generic LQFP-48 symbol without a pin-by-pin manufacturer cross-check could create board-level errors.
Do not treat W78E058DDG, W78E054DFG, or another similarly named MCU as an automatic substitute. Confirm package, pinout, memory organization, RAM, timers, serial interfaces, interrupt behavior, oscillator requirements, and electrical limits before replacing W78E054DDG. Firmware developed for one member of the W78E054D/W78E052D family may depend on device-specific SFR definitions or timing, even when the package suffix appears similar.
Operate the MCU and all connected interface devices within the verified 2.4 V to 5.5 V supply range. Check pull-up values against the selected logic rail because an overvoltage on an I/O pin can exceed the device limits even when VDD itself is valid. Place the supply bypass capacitance close to the device using the manufacturer’s recommended network and verify startup behavior across temperature and supply corners.
合規資訊
The Mouser listing identifies W78E054DDG as Pb-free. The verified excerpts do not provide explicit RoHS, REACH, halogen-free, conflict-minerals, or automotive-qualification statements. AEC-Q100 is not applicable because the supplied data does not identify this part as automotive qualified.
