W78I052DDG - 8-Bit 8051 MCU, 8KB Flash, 40-DIP | Nuvoton
Référence : W78I052DDG ✓ ActifW78I052DDG Présentation
An 8-bit microcontroller is the lowest-complexity class of programmable embedded controllers. In the component hierarchy, the W78I052DDG is a microcontroller and therefore belongs to the broader integrated-circuit and embedded-processing categories. Its practical role is to execute firmware, read inputs, control outputs, and coordinate basic peripherals within appliances, industrial equipment, access systems, and small control products. Compared with a 32-bit microcontroller, it emphasizes economical control and compact software rather than high-performance computation or large memory capacity.
The verified product information identifies an 8KB Flash configuration, a 2.4 V to 5.5 V supply range, Pb-free construction, and an operating temperature range of -40°C to +85°C. The 40-DIP package provides 40 physical pins and straightforward through-hole assembly. These characteristics make the W78I052DDG relevant to designs that need a low-power, low-cost controller with legacy-compatible programming and board-level integration. Exact RAM, clock, peripheral, and electrical timing details must be confirmed in the manufacturer datasheet before schematic sign-off.
Nuvoton's W78 family provides an established 8051-style software environment, allowing familiar C or assembly development workflows and access to common embedded-control patterns such as port-based I/O, timers, serial communication, and interrupt-driven control. An enhanced 8-bit core is particularly useful for supervisory and control tasks where deterministic state-machine behavior is sufficient but a higher-cost processor and larger memory system would add unnecessary cost, board area, and power consumption.
Typical uses include appliance controllers, access-control terminals, industrial sequencers, instrumentation interfaces, lighting controls, and small embedded control boards. Its 8KB Flash supports compact firmware containing startup code, peripheral drivers, state logic, and user-interface handling. The 2.4 V to 5.5 V range permits operation across common low-voltage rails, although the designer must verify that every external peripheral shares a compatible voltage level or requires appropriate interfacing.
When designing a board around the W78I052DDG, verify oscillator, reset, programming-interface, and decoupling requirements directly against the manufacturer datasheet. Do not infer missing pin functions from the 8051 family name. The supplied search excerpt confirms the 40-DIP package and general device class, but it does not provide a complete verified pin table; consequently, the pinout field is null rather than presenting an unverified drawing.
This product record consolidates the verified supplier information, package identification, technical selection guidance, application fit, and explicitly qualified replacement analysis. It also distinguishes confirmed specifications from parameters that still require direct confirmation from the manufacturer datasheet, reducing the risk of an invalid engineering assumption.
Alternatives de remplacement direct pour W78I052DDG — 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 W78I052DDG (même facteur de forme et même empreinte) — différant par Architecture, Flash Memory, Operating Temperature Range, Package.
W78I051DDG
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
W78I053DDG
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
W78I054DDG
✅ Remplacement direct ⚠️ Spécifications non vérifiéesContactez-nous pour le prix
Voir la fiche technique →W78I055DDG
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
W78I056DDG
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
W78I052DDG Valeurs maximales et caractéristiques électriques
| Product Type | 8-bit embedded microcontroller |
| Architecture | Enhanced 8051-compatible 8-bit architecture |
| Flash Memory | 8 KB |
| Operating Supply Voltage Range | 2.4 V to 5.5 V |
| Plage de température de fonctionnement | -40°C to +85°C |
| Boîtier | 40-DIP |
| Style de montage | Through-hole |
| Lead-Free Status | Pb-free |
| Program Memory Type | Flash |
Guide de configuration des broches du W78I052DDG 40-dip
Configuration des broches du W78I052DDG (boîtier 40-dip). 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 W78I052DDG.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
W78I052DDG convient pour 6 applications: Appliance Control, Industrial Sequencer, Access Control Terminal, Instrumentation Interface, Lighting and Relay Control, Battery-Powered Sensor Node.
Appliance Control
The W78I052DDG fits appliance-control boards that require an economical 8-bit controller, 8KB Flash, and operation from 2.4 V to 5.5 V. It can execute a compact state machine for user inputs, relays, indicators, motors, and safety interlocks while operating across the verified -40°C to +85°C range. The 40-DIP package also simplifies repair and assembly in products assembled through holes. Engineers should reserve firmware space for startup checks and fault handling, then verify each peripheral's timing and pin assignment against the manufacturer datasheet before release.
Recommandé
Industrial Sequencer
The W78I052DDG is appropriate for small industrial sequencers where the required logic is deterministic and 8KB of Flash is sufficient for state tables, interlocks, counters, and operator I/O. Its 2.4 V to 5.5 V supply range supports low-voltage embedded systems, while the -40°C to +85°C specification covers many indoor industrial environments. The 40-DIP package makes the controller practical for legacy-style control boards and serviceable assemblies. Confirm electrical noise tolerance, isolation requirements, watchdog behavior, and I/O drive limits in the full datasheet.
Recommandé
Access Control Terminal
The W78I052DDG can serve as the controller in a compact access-control terminal when the product needs credential-state handling, keypad scanning, status indication, and communication-driver firmware rather than high-end computation. Its 8KB Flash provides space for a compact embedded program, and the 2.4 V to 5.5 V operating range can simplify integration with low-voltage peripherals. The 40-DIP package supports through-hole boards common in durable terminal designs. Security-critical designs require additional review of programming access, lockout behavior, communications integrity, and tamper-response requirements.
Recommandé
Instrumentation Interface
The W78I052DDG is suitable for basic instrumentation interfaces that translate switch states, sensor levels, and front-panel commands into a controlled embedded system. An 8-bit core and 8KB Flash are generally adequate for measurement sequencing, calibration constants, local status, and compact communications, while the 2.4 V to 5.5 V range permits integration with common embedded rails. The 40-DIP package is practical for low-volume instruments and serviceable boards. Validate analog tolerances, reference stability, and communication timing before using the controller for safety-critical readings.
Recommandé
Lighting and Relay Control
The W78I052DDG can control relays, lamps, indicators, and other discrete loads in lighting panels or building-control modules. Its 8KB Flash is sufficient for timers, schedules, operating modes, fault counters, and basic user commands, while the 8-bit architecture keeps the control loop economical. The verified 2.4 V to 5.5 V range allows operation from common low-voltage rails and the -40°C to +85°C range supports many indoor products. Use suitable driver transistors, isolation, flyback protection, and safety-rated components rather than driving loads directly from MCU pins.
Recommandé
Battery-Powered Sensor Node
The W78I052DDG can serve as the supervisory controller in a low-power sensor node when the node performs occasional sampling, local filtering, status reporting, and sleep-mode management. The 2.4 V to 5.5 V operating range covers several common low-energy rail options, while the compact 8KB Flash budget favors firmware focused on measurement orchestration and communications. The 40-DIP package is useful for prototypes and serviceable modules. Validate quiescent current, sleep-mode wake behavior, analog sensor accuracy, and battery lifetime because those values are not confirmed in the supplied excerpts.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour W78I052DDG — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | W78I051DDG | W78I053DDG | W78I054DDG | W78I055DDG | W78I056DDG |
|---|---|---|---|---|---|---|
| Package | 40-DIP | 40-DIP | 40-DIP | 40-DIP | 40-DIP | 40-DIP |
| Brand | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation |
| Product Type | 8-bit embedded microcontroller | 8-bit embedded microcontroller | 8-bit embedded microcontroller | 8-bit embedded microcontroller | 8-bit embedded microcontroller | 8-bit embedded microcontroller |
Principaux différenciateurs
- Through-hole integration in a 40-DIP package (vs ATMEGA328P-MNR)
- Established enhanced 8051-compatible software target (vs W78E052DDG)
- Compact 8KB Flash configuration (vs W78I051DDG)
Notes de conception
Do not approve a replacement solely from the W78I05x family name. The verified data confirms the target's 8KB Flash and 40-DIP package, but it does not expose complete candidate pin tables. Verify supply pins, ground pins, reset, oscillator, programming signals, every used I/O, timer inputs, and interrupt assignments against the exact candidate datasheet. Although all listed alternatives use the 40-DIP footprint, footprint equality alone does not guarantee electrical or firmware compatibility.
The W78I052DDG operates across 2.4 V to 5.5 V, so the power architecture must keep every connected device within its own valid range. Confirm the minimum and maximum operating voltage from the manufacturer datasheet and include appropriate local bypass capacitance at the supply pins. External sensors, transceivers, and actuators may require level translation or separate rails. The supplied excerpts do not provide current consumption or regulator dropout data, so those values must not be inferred.
The 40-DIP footprint supports straightforward through-hole routing, but it does not eliminate good analog and digital layout practice. Place the MCU away from relay contacts, mains-derived nodes, and high-current switching paths; return switching currents through a controlled path rather than through signal-ground areas. Verify oscillator placement, programming access, reset behavior, and decoupling directly from the manufacturer application guidance before releasing the PCB.
Use the package-specific power dissipation and maximum junction-temperature limits from the Nuvoton datasheet rather than assuming that a DIP package can dissipate unrestricted power. Calculate worst-case internal dissipation from the actual supply voltage, I/O loading, clock configuration, and ambient temperature. Where dissipation is significant, use copper area, airflow, or a heat sink and maintain adequate clearance from temperature-sensitive components.
Informations de conformité
The verified Mouser listing explicitly states Pb-free. The supplied excerpts mention lead-free parts information in the datasheet search result, but they do not provide a complete RoHS, REACH, halogen-free, conflict-minerals, or automotive-qualification declaration for the exact W78I052DDG suffix.
