W78E054DPG - 8-Bit 40MHz 8051 MCU | Nuvoton
Référence : W78E054DPG ✗ Fin de vieW78E054DPG Présentation
An 8-bit microcontroller is a compact embedded-control processor designed to execute firmware, read inputs, and control outputs in equipment such as security systems, barcode readers, industrial controllers, user interfaces, and communication products. Within the semiconductor hierarchy, the W78E054DPG belongs to the 8051-compatible MCU family, combining a CISC instruction set with integrated program memory, data memory, timers, serial interfaces, and parallel I/O.
The W78E054DPG provides 16KB of Flash memory for firmware storage and 256 x 8 bits of RAM for working data. Its 36 available I/O lines support external sensors, switches, indicators, actuators, and peripheral interfaces. The configurable 6T/12T architecture and external oscillator provide flexibility for designs based on the traditional 12T 8051 interface. Operation across 2.4V to 5.5V also accommodates legacy 2.5V, 3.3V, and 5V system environments.
The maximum clock frequency of 40MHz makes the device suitable for control tasks that require deterministic embedded processing without a higher-cost application processor. Its 8052-compatible architecture supports established 8051 development methods, while the integrated Flash memory permits field-programmable firmware rather than a mask-programmed ROM implementation. The PLCC-44 package is intended for socketed or board-level assembly where serviceability and a compact leaded footprint are important.
Typical applications include alarm and security panels, barcode-reader interfaces, keyboard and telephone equipment, kiosk and user-interface controllers, industrial peripherals, and compact embedded IPC systems. For these uses, the combination of 36 I/O pins, 16KB Flash, 256 x 8-bit RAM, and 2.4V to 5.5V operation provides sufficient resources for supervisory control, protocol handling, and peripheral coordination.
Designers should verify oscillator, reset, and memory-interface requirements against the manufacturer datasheet before layout. Because the product is classified Not Recommended for New Designs, existing equipment maintenance can justify sourcing this NRND device, but new platforms should assess currently supported Nuvoton MCU families rather than assuming long-term availability.
This product record combines manufacturer lifecycle information, distributor specifications, packaging data, and application-focused engineering guidance. It also distinguishes verified source data from unavailable commercial information, making the W78E054DPG easier to evaluate for legacy-system maintenance without presenting unverified pricing, pin assignments, or replacement claims as facts.
Alternatives de remplacement direct pour W78E054DPG — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec W78E054DPG (même facteur de forme et même empreinte) — différant par Architecture, Microcontroller Type, Mounting Type, Package, Program Memory Size.
W78E052DFG
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →W78E058DDG
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →W78E054DPG Valeurs maximales et caractéristiques électriques
| Microcontroller Type | 8-bit 8052 W78 Microcontroller IC |
| Maximum CPU Frequency | 40 MHz |
| Program Memory Size | 16KB (16K x 8) Flash |
| RAM Size | 256 x 8 bits |
| Number of I/O Pins | 36 pins |
| Total Package Pins | 44 pins |
| Package Type | 44-pin PLCC |
| Tension d'alimentation de fonctionnement | 2.4V to 5.5V |
| Température de fonctionnement | -40°C to +85°C |
| Oscillator Type | External |
| Architecture | Configurable 6T/12T 8051-compatible architecture |
| Program Memory Type | Flash |
| Packaging Form | Tube |
| Statut du cycle de vie | Not Recommended for New Designs (NRND) |
| Lead-Free Status | Pb-free |
| Target Applications | Security/alarm, barcode reader, KVM, key phone, UI, and IPC |
Guide de configuration des broches du W78E054DPG 44-pin plcc
Configuration des broches du W78E054DPG (boîtier 44-pin plcc). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour W78E054DPG.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
W78E054DPG convient pour 6 applications: Security and Alarm Panels, Barcode Reader Interfaces, KVM and Keyboard Controllers, Industrial User Interfaces, Compact Embedded IPC, Legacy 5V Control Systems.
Security and Alarm Panels
The W78E054DPG fits security-panel and alarm-control tasks that require deterministic 8-bit control across 2.4V to 5.5V. Its 36 I/O pins can support door contacts, zone inputs, indicator outputs, relay drivers, and keypad interfaces, while the 40MHz maximum clock provides processing headroom for debouncing and communication routines. The 16KB Flash stores panel firmware, and 256 x 8 bits of RAM supports working state. Because the device is NRND, it is most appropriate for maintaining established equipment unless a supported successor has been fully qualified.
Recommandé
Barcode Reader Interfaces
The W78E054DPG can serve as the embedded controller in a barcode-reader interface where a compact 8051-compatible architecture and 36 I/O lines are useful. The 40MHz operating limit supports protocol handling and input/output coordination, while 16KB of Flash accommodates control firmware and the 256 x 8-bit RAM provides working memory. Its 2.4V to 5.5V range accommodates legacy 3.3V and 5V scanner electronics. Validate decoder timing, serial levels, and power sequencing against the specific reader module before design release.
Recommandé
KVM and Keyboard Controllers
The W78E054DPG is appropriate for keyboard, key-phone, and KVM control boards that need dense I/O in a compact 44-pin PLCC package. Its 36 I/O lines can support key scanning, indicator control, and host-interface signaling, and the 40MHz maximum frequency provides deterministic execution for debounce and packet handling. The 16KB Flash configuration is suitable for embedded control code, while the device’s 2.4V to 5.5V range supports legacy system rails. Verify switch timing and active levels in the target keyboard or KVM circuit.
Recommandé
Industrial User Interfaces
The W78E054DPG can control compact industrial user-interface modules using its 36 I/O pins for buttons, indicators, displays, and peripheral control signals. Its 40MHz maximum clock allows responsive menu, state-machine, and communication handling, while 16KB Flash stores application firmware. Operation from 2.4V to 5.5V and -40°C to +85°C supports legacy industrial environments, subject to correct power regulation and signal conditioning. The NRND lifecycle makes long-term availability planning especially important for equipment expected to remain in service for many years.
Recommandé
Compact Embedded IPC
The W78E054DPG is suitable for supervisory control in compact embedded IPC and equipment-control modules that rely on an 8051-compatible instruction set. Its 36 I/O pins provide connectivity for sensors, actuators, status indicators, and host interfaces, while the 16KB Flash and 256 x 8-bit RAM divide storage between firmware and runtime data. The device can operate at up to 40MHz within a 2.4V to 5.5V supply range. Confirm peripheral function assignments and package pin compatibility because legacy controller interchangeability depends on exact silicon and firmware support.
Recommandé
Legacy 5V Control Systems
The W78E054DPG supports legacy 5V control-system maintenance where designers need an 8052-compatible MCU with 16KB Flash and 36 I/O pins. Its 2.4V to 5.5V operating range allows use in both 5V and appropriately designed 3.3V equipment, and the 40MHz frequency limit accommodates established timing assumptions. The 44-pin PLCC format can simplify replacement of an existing socketed design, provided footprint, pin numbering, oscillator arrangement, and supply requirements match. The NRND status requires proactive sourcing and lifecycle monitoring.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour W78E054DPG — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | W78E052DFG | W78E058DDG |
|---|---|---|---|
| Package | 44-pin PLCC | 44-pin PLCC | 44-pin PLCC |
| Brand | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation |
| Maximum CPU Frequency | 40 MHz | 40 MHz family rating | 40 MHz family rating |
| Operating Voltage | 2.4V to 5.5V | 2.4V to 5.5V family rating | 2.4V to 5.5V family rating |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C family rating | -40°C to +85°C family rating |
Principaux différenciateurs
- Verified 16KB Flash configuration in a 44-pin PLCC package (vs W78E052DFG)
- Specific documented operating configuration (vs W78E058DDG)
- Established PLCC-44 legacy-system fit (vs W78E052DFG)
Notes de conception
Do not treat the W78E054D family-level statement about traditional 12T 8051 compatibility as proof that every W78E05x device is interchangeable. The verified target is specifically W78E054DPG in a 44-pin PLCC package with 16KB Flash. Before substitution, compare memory capacity, I/O assignments, oscillator pins, reset behavior, serial peripherals, and package pin numbering against the manufacturer datasheet.
The verified operating range is 2.4V to 5.5V, but this does not establish the permitted core voltage or every rail combination. Consult the datasheet when designing the supply, decoupling, and external clock circuitry. In particular, verify clock-source amplitude, startup behavior, and I/O levels in 2.5V, 3.3V, and 5V implementations rather than assuming logic thresholds remain interchangeable across the full range.
The PLCC-44 package is not represented by a dedicated canonical package-diagram key in the available library, so the pinout is intentionally null rather than reconstructed from an incomplete distributor listing. PCB designers should use the exact manufacturer pin drawing and land pattern, verify pin 1 orientation, and account for socket or soldered-package geometry. Do not use a generic PLCC footprint based only on the pin count.
Because the family is NRND, a successful prototype does not guarantee future availability. Obtain manufacturer lifecycle statements, authorized-distributor inventory, date-code information, and a written end-of-life plan for production builds. For new designs, compare the W78E054DPG against currently supported Nuvoton devices instead of committing a long-lived platform solely because the legacy part is readily available in the short term.
Informations de conformité
The Mouser listing explicitly identifies W78E054DPG as Pb-free. The supplied data does not provide verified RoHS, REACH, AEC-Q100, halogen-free, or conflict-minerals declarations.
