W77I058A25PL - 8-Bit 25MHz 32KB Flash MCU | Nuvoton
Référence : W77I058A25PL ✓ ActifW77I058A25PL Présentation
A microcontroller is a programmable semiconductor that integrates a processor core, program memory, data memory, I/O ports, and peripheral functions onto one device. The 8051-compatible instruction set belongs to the broader 8-bit embedded-controller family. Nuvoton's W77 series targets applications in which deterministic 8-bit control, integrated flash memory, and a broad operating-voltage range are more useful than the compute density or peripheral breadth of a 32-bit processor.
The W77I058A25PL provides 32 KB of flash memory organized as 32K x 8, allowing firmware and constant data to be stored on the chip. Its internal data memory is 1K x 8 bytes, and 36 I/O pins provide connections for sensors, switches, displays, actuators, and communication interfaces. The four-cycle 80C51 execution architecture supports clock speeds up to 25 MHz while retaining a familiar programming model.
Operation from 2.7 V to 5.5 V makes the device suitable for both 3.3 V and 5 V system environments. The specified -40 °C to +85 °C industrial temperature range supports equipment operating across extended ambient conditions. Its PLCC-44 package also offers a leaded mechanical format useful for through-hole assembly, repair, and designs where connectorized or socketed parts are preferred.
Typical uses include industrial control panels, communications equipment, connected peripherals, printer controllers, automotive infotainment interfaces, and fixed-line access products. At 36 I/O, the controller can supervise multiple discrete inputs and outputs while retaining flash-based programmability for product variants and field updates.
When designing the board, verify the oscillator and reset implementation against the manufacturer datasheet, reserve all required power pins, and route the 36 I/O signals according to the PLCC-44 pin description. Because PLCC parts can be socketed, confirm solderability and assembly-process requirements early in the mechanical design.
This page consolidates the confirmed controller specifications, package details, sourcing information, application guidance, and design considerations into one engineering reference for evaluating the W77I058A25PL in new or existing 8051-compatible equipment.
Alternatives de remplacement direct pour W77I058A25PL — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
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W77I051A25PL
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✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
W77I058A25PL
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Voir la fiche technique →W77E058A25PL
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
W77I058A25PL Valeurs maximales et caractéristiques électriques
| Microcontroller Type | 8-bit 8051-compatible W77 microcontroller |
| Fréquence d'horloge maximale | 25 MHz |
| Program Memory Size | 32 KB (32K x 8) |
| Program Memory Type | Flash |
| RAM Size | 1 KB (1K x 8) |
| Number of I/O Lines | 36 |
| Operating Voltage Range | 2.7 V to 5.5 V |
| Nominal Supply Levels | 3.3 V and 5 V |
| Plage de température de fonctionnement | -40 °C to +85 °C |
| CPU Architecture | 4-cycle 80C51 |
| Instruction Set | 8051-compatible |
| Package Type | 44-pin PLCC |
| Package Form | 44-LCC J-lead |
| Type de montage | Surface mount |
Guide de configuration des broches du W77I058A25PL 44-lcc j-lead
Configuration des broches du W77I058A25PL (boîtier 44-lcc j-lead). 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 W77I058A25PL.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
W77I058A25PL convient pour 6 applications: Industrial Control Panels, Communications Equipment, Connected Peripherals and Printers, Fixed-Line Access Equipment, Automotive Infotainment Interfaces, Legacy 8051 System Modernization.
Industrial Control Panels
The W77I058A25PL fits industrial control-panel designs that require multiple discrete inputs and outputs but do not need a high-performance operating system. Its 36 I/O lines can support limit switches, status indicators, relays, and discrete sensors, while 32 KB of flash holds panel firmware and lookup data. The 2.7 V to 5.5 V supply range and -40 °C to +85 °C specification suit both 3.3 V and 5 V control electronics. Designers should verify timer, interrupt, and I/O-drive requirements in the manufacturer datasheet and use the PLCC-44 pin table to assign every signal.
Communications Equipment
The W77I058A25PL is appropriate for protocol-handling and supervisory functions in communications equipment because its four-cycle 80C51 core can operate at 25 MHz while retaining the familiar 8051 programming model. The 32 KB flash provides room for firmware, configuration tables, and protocol data, and 1 KB of RAM supports short buffers and execution stack requirements. Its 36 I/O lines can accommodate interface and status signals. Selection should confirm the required serial peripherals, interrupt priorities, timing margin, and any external memory interface before the PCB is committed.
Connected Peripherals and Printers
The W77I058A25PL can serve as the embedded controller in printers, connected peripherals, and small appliance interfaces where a compact 8-bit architecture is sufficient. Flash permits product-specific firmware and configuration handling, while the available I/O can connect switches, sensors, status lamps, and actuators. The PLCC-44 package supports designs using sockets or leaded assembly, but assembly temperature and solderability must be checked against the ordered variant. A production design should also validate motor, heating, or power-driver isolation from the controller rather than driving loads directly through I/O pins.
Fixed-Line Access Equipment
The W77I058A25PL is suitable for supervisory and peripheral functions in fixed-line access equipment where an established 8051-compatible software base is valuable. Its 25 MHz operating speed and 32 KB flash can support protocol state machines, diagnostics, and configuration storage, while 36 I/O lines provide substantial connection flexibility. The -40 °C to +85 °C specification supports industrial operating environments, and the 2.7 V to 5.5 V range allows integration with both 3.3 V and 5 V subsystems. Final qualification should review ESD, surge, isolation, and regulatory requirements at the system level.
Automotive Infotainment Interfaces
The W77I058A25PL can be evaluated for auxiliary control and interface functions in automotive infotainment systems where an 8051-compatible controller and PLCC package are appropriate. The 36 I/O lines and 32 KB of flash suit button, keypad, display-status, and configuration tasks, while the wide supply range supports integration into mixed-voltage electronics. This application requires additional qualification because the listed device has no confirmed AEC-Q100 status in the manufacturer documentation. Automotive engineers must also evaluate temperature extremes, transient immunity, vibration, and functional-safety requirements before production use.
Legacy 8051 System Modernization
The W77I058A25PL is useful when maintaining or selectively updating an 8051-based control platform that still uses a 44-pin PLCC layout. Its four-cycle 80C51 architecture can improve execution efficiency within the established instruction set, while 32 KB of flash provides substantially more program capacity than many mask-programmed predecessors. The 36 I/O lines make it plausible for legacy peripheral-heavy products. Migration requires exact comparison of oscillator pins, reset polarity, port modes, interrupt vectors, memory addressing, and peripheral registers; source-level compatibility alone does not guarantee hardware drop-in compatibility.
Données de référence d'ingénierie pour W77I058A25PL — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit |
|---|---|
| Manufacturer | Nuvoton Technology Corporation |
| Package | 44-pin PLCC, J-lead |
| Architecture | 8-bit 8051-compatible W77 |
| CPU Cycle | 4-cycle 80C51 |
| Maximum Clock Frequency | 25 MHz |
| Program Memory | 32 KB flash (32K x 8) |
| Internal RAM | 1 KB (1K x 8) |
| I/O Lines | 36 |
| Operating Voltage | 2.7 V to 5.5 V |
| Operating Temperature | -40 °C to +85 °C |
Notes de conception
Route the PLCC-44 footprint strictly from the manufacturer pin-description table, including supply, ground, reset, oscillator, and all 36 I/O assignments. Keep high-current or inductive loads away from the controller area and provide local return paths that do not share noisy load current with sensitive signal returns. Confirm pad and courtyard dimensions against the ordered PLCC variant before releasing the PCB library.
Design the supply network for the confirmed 2.7 V to 5.5 V operating range and place the recommended bypass capacitors close to the device power pins. If the board also contains relays, motor drivers, or switching converters, prevent their transients from crossing the controller's supply pins. Review the power-on ramp and reset behavior in the manufacturer datasheet because an uncontrolled ramp can produce unintended execution states.
Do not treat 8051-compatible as proof that every legacy device is interchangeable. Compare oscillator configuration, reset polarity, port-drive strength, peripheral register addresses, interrupt vectors, and startup behavior before replacing an existing MCU. The PLCC-44 package is also sensitive to soldering and handling, so verify the assembly process, cleaning requirements, and connector orientation before production release.
Informations de conformité
The manufacturer datasheet listing does not establish the requested environmental, automotive, or material-compliance statuses. These fields remain unknown pending a current manufacturer declaration for the exact orderable device.