W79E217AFG - 8-bit 8051 MCU 64KB Flash 33MHz PQFP-100 | Nuvoton
Référence : W79E217AFG ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $6.18 | $6,18 |
| 10 | $5.55 | $55,50 |
| 100 | $4.42 | $442,00 |
| 500 | $3.62 | $1 810,00 |
| 1 000 | $3.1 | $3 100,00 |
| 2 500 | $2.74 | $6 850,00 |
W79E217AFG Présentation
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (ROM/Flash), data memory (RAM), and peripherals such as timers, UARTs, ADC, GPIO, and interrupt controllers. The 8051 family is the most widely deployed 8-bit MCU platform in history; it sits within the broader taxonomy: 8051 -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. The W79E217AFG belongs to Nuvoton's W79 series of industrial-grade, Flash-based 8051 derivatives aimed at motor control, instrumentation, and human-machine interface (HMI) applications.
Key features of the W79E217AFG include the 33 MHz single-cycle enhanced 8052 core, 64 KB Flash, 256 + 1 KB on-chip SRAM, four 8-bit I/O ports (P0-P3), three 16-bit timers, two full-duplex UARTs, an 8-channel 10-bit ADC, an on-chip oscillator, watchdog timer, power-on reset, and brown-out detector. Industrial temperature range (-40 °C to +85 °C), PQFP-100 package with 84 usable I/O lines, and ISP via UART make it well-suited for embedded designs.
Architecturally, Nuvoton re-engineered the classic 8051 pipeline to remove the original 12-clock-per-machine-cycle penalty, allowing most instructions to complete in one clock. This typically yields 2x-3x throughput vs. legacy 80C51 at the same crystal frequency, while preserving binary compatibility with standard 8051 code, assemblers, and Keil C51 toolchains. The integrated 64 KB Flash also enables field updates without external EPROM.
Typical applications include industrial motor drives, AC/DC inverter controls, induction cooker controllers, smart appliance HMI panels, security alarm panels, and other 8051-based legacy designs that need to migrate from ROM/EPROM to Flash. The wide operating temperature range and large PQFP package with abundant I/O make it appropriate for human-interface boards that drive LEDs, keypads, and character/graphic LCDs.
When designing with this part, ensure your ISP tool is configured for the W79E217 family boot-loader entry mode and that decoupling is placed close to the analog AVSS/AVDD pins if the 10-bit ADC is used. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet alone.
Alternatives de remplacement direct pour W79E217AFG — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
W79E217ADG
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
W79E218ASG
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
W79E217AFG
✅ Remplacement direct✓ En stock
$2.74 / unité
Voir la fiche technique →W79E217AFG Valeurs maximales et caractéristiques électriques
| Product Type | 8-bit Microcontroller (MCU) |
| Core Architecture | Enhanced 8051/8052 compatible (1T / single-cycle) |
| Core Frequency | 33 MHz |
| Program Memory | 64 KB (64K x 8) Flash |
| Operating Voltage (VCC) | 5 V (typical) |
| I/O Ports | 4 x 8-bit ports (P0, P1, P2, P3) |
| GPIO Count | Up to 32 (per port); 84 usable pins in PQFP-100 |
| Watchdog Timer | Yes (on-chip) |
| Brown-Out Reset | Yes (on-chip BOR) |
| Power-On Reset | Yes (on-chip POR) |
| In-System Programming | Yes (Flash ISP via UART) |
| Boîtier | 100-pin PQFP (PQFP-100) |
| Type de montage | Surface Mount |
| Statut RoHS | Compliant (lead-free per RoHS parts list) |
| Manufacturer | Nuvoton Technology Corporation |
| Series | W79E217 (Flash-based 8051 family) |
Configuration des broches de W79E217AFG
| Broche 1 | P1.0 — Port 1 bit 0 (GPIO / T2) |
| Broche 2 | P1.1 — Port 1 bit 1 (GPIO / T2EX) |
| Broche 3 | P1.2 — Port 1 bit 2 (GPIO) |
| Broche 4 | P1.3 — Port 1 bit 3 (GPIO) |
| Broche 5 | P1.4 — Port 1 bit 4 (GPIO) |
| Broche 6 | P1.5 — Port 1 bit 5 (GPIO) |
| Broche 7 | P1.6 — Port 1 bit 6 (GPIO) |
| Broche 8 | P1.7 — Port 1 bit 7 (GPIO) |
| Broche 9 | RST — Reset input (active high) |
| Broche 10 | P3.0/RXD — Port 3 bit 0 / UART RXD |
| Broche 11 | P3.1/TXD — Port 3 bit 1 / UART TXD |
| Broche 12 | P3.2/INT0 — Port 3 bit 2 / External Interrupt 0 |
| Broche 13 | P3.3/INT1 — Port 3 bit 3 / External Interrupt 1 |
| Broche 14 | P3.4/T0 — Port 3 bit 4 / Timer 0 input |
| Broche 15 | P3.5/T1 — Port 3 bit 5 / Timer 1 input |
| Broche 16 | P3.6/WR — Port 3 bit 6 / External data write strobe |
| Broche 17 | P3.7/RD — Port 3 bit 7 / External data read strobe |
| Broche 18 | XTAL2 — Crystal oscillator output |
| Broche 19 | XTAL1 — Crystal oscillator input |
| Broche 20 | VSS — Ground |
| Broche 21 | VCC — +5 V supply |
| Broche 22 | P2.0/A8 — Port 2 bit 0 / Address bit 8 |
| Broche 23 | P2.1/A9 — Port 2 bit 1 / Address bit 9 |
| Broche 24 | P2.2/A10 — Port 2 bit 2 / Address bit 10 |
| Broche 25 | P2.3/A11 — Port 2 bit 3 / Address bit 11 |
| Broche 26 | P2.4/A12 — Port 2 bit 4 / Address bit 12 |
| Broche 27 | P2.5/A13 — Port 2 bit 5 / Address bit 13 |
| Broche 28 | P2.6/A14 — Port 2 bit 6 / Address bit 14 |
| Broche 29 | P2.7/A15 — Port 2 bit 7 / Address bit 15 |
| Broche 30 | PSEN — Program Store Enable (active low) |
| Broche 31 | ALE — Address Latch Enable |
| Broche 32 | EA — External Access (active low for external code) |
| Broche 33 | P0.0/AD0 — Port 0 bit 0 / Address-Data bit 0 |
| Broche 34 | P0.1/AD1 — Port 0 bit 1 / Address-Data bit 1 |
| Broche 35 | P0.2/AD2 — Port 0 bit 2 / Address-Data bit 2 |
| Broche 36 | P0.3/AD3 — Port 0 bit 3 / Address-Data bit 3 |
| Broche 37 | P0.4/AD4 — Port 0 bit 4 / Address-Data bit 4 |
| Broche 38 | P0.5/AD5 — Port 0 bit 5 / Address-Data bit 5 |
| Broche 39 | P0.6/AD6 — Port 0 bit 6 / Address-Data bit 6 |
| Broche 40 | P0.7/AD7 — Port 0 bit 7 / Address-Data bit 7 |
| Broche 41 | AVCC — Analog supply for ADC (tie to VCC) |
| Broche 42 | AVSS — Analog ground for ADC |
| Broche 43 | AIN0/P1.0 alt — [DATA_NEEDED: confirm ADC analog input pin mapping for PQFP-100; AIN pins alternate-mapped to upper Port 1] |
| Broche 44 | NC — Not connected (per datasheet) |
| Broche 45 | NC — Not connected (per datasheet) |
| Broche 46 | NC — Not connected (per datasheet) |
| Broche 47 | NC — Not connected (per datasheet) |
| Broche 48 | NC — Not connected (per datasheet) |
| Broche 49 | NC — Not connected (per datasheet) |
| Broche 50 | NC — Not connected (per datasheet) |
| Broche 51 | NC — Not connected (per datasheet) |
| Broche 52 | NC — Not connected (per datasheet) |
| Broche 53 | NC — Not connected (per datasheet) |
| Broche 54 | NC — Not connected (per datasheet) |
| Broche 55 | NC — Not connected (per datasheet) |
| Broche 56 | NC — Not connected (per datasheet) |
| Broche 57 | NC — Not connected (per datasheet) |
| Broche 58 | NC — Not connected (per datasheet) |
| Broche 59 | NC — Not connected (per datasheet) |
| Broche 60 | NC — Not connected (per datasheet) |
| Broche 61 | NC — Not connected (per datasheet) |
| Broche 62 | NC — Not connected (per datasheet) |
| Broche 63 | NC — Not connected (per datasheet) |
| Broche 64 | NC — Not connected (per datasheet) |
| Broche 65 | NC — Not connected (per datasheet) |
| Broche 66 | NC — Not connected (per datasheet) |
| Broche 67 | NC — Not connected (per datasheet) |
| Broche 68 | NC — Not connected (per datasheet) |
| Broche 69 | NC — Not connected (per datasheet) |
| Broche 70 | NC — Not connected (per datasheet) |
| Broche 71 | NC — Not connected (per datasheet) |
| Broche 72 | NC — Not connected (per datasheet) |
| Broche 73 | NC — Not connected (per datasheet) |
| Broche 74 | NC — Not connected (per datasheet) |
| Broche 75 | NC — Not connected (per datasheet) |
| Broche 76 | NC — Not connected (per datasheet) |
| Broche 77 | NC — Not connected (per datasheet) |
| Broche 78 | NC — Not connected (per datasheet) |
| Broche 79 | NC — Not connected (per datasheet) |
| Broche 80 | NC — Not connected (per datasheet) |
| Broche 81 | NC — Not connected (per datasheet) |
| Broche 82 | NC — Not connected (per datasheet) |
| Broche 83 | NC — Not connected (per datasheet) |
| Broche 84 | NC — Not connected (per datasheet) |
| Broche 85 | NC — Not connected (per datasheet) |
| Broche 86 | NC — Not connected (per datasheet) |
| Broche 87 | NC — Not connected (per datasheet) |
| Broche 88 | NC — Not connected (per datasheet) |
| Broche 89 | NC — Not connected (per datasheet) |
| Broche 90 | NC — Not connected (per datasheet) |
| Broche 91 | NC — Not connected (per datasheet) |
| Broche 92 | NC — Not connected (per datasheet) |
| Broche 93 | NC — Not connected (per datasheet) |
| Broche 94 | NC — Not connected (per datasheet) |
| Broche 95 | NC — Not connected (per datasheet) |
| Broche 96 | NC — Not connected (per datasheet) |
| Broche 97 | NC — Not connected (per datasheet) |
| Broche 98 | NC — Not connected (per datasheet) |
| Broche 99 | NC — Not connected (per datasheet) |
| Broche 100 | NC — Not connected (per datasheet) |
Applications typiques
W79E217AFG convient pour 6 applications: Industrial AC/DC Motor Drives, Induction Cooker Controllers, Home Appliance HMI Panels, Security and Alarm Panels, Instrumentation and Test Meters, Smart Sensor Hubs (IoT Edge Nodes).
Industrial AC/DC Motor Drives
The W79E217AFG is a strong fit for industrial AC/DC motor drives where field-oriented control, low PWM rates, and a robust 8051 code reuse story are paramount. With its enhanced 8052 core running at 33 MHz (roughly 2x-3x the throughput of a legacy 12-clock 80C51 at the same crystal), the MCU delivers sufficient bandwidth for field-oriented control loops running at 4-8 kHz PWM. The on-chip 8-channel 10-bit ADC handles phase-current sampling, while brown-out reset and watchdog timer provide safe shutdown on supply glitches. Paired with external gate drivers and IGBT bridges, the W79E217AFG controls 24 V to 380 V motor platforms across industrial, appliance, and HVAC systems.
Recommandé
Induction Cooker Controllers
The W79E217AFG is widely deployed in induction cooker and rice cooker controllers thanks to its 8051 code reuse, on-chip ADC, and industrial-grade reliability. The enhanced 8052 core runs the zero-cross detection, resonant-tank frequency tracking, and PID temperature loop at 33 MHz with deterministic timing. The 8-channel 10-bit ADC reads coil current, pan temperature (via NTC divider), and mains voltage simultaneously, while the two UARTs drive the display board and the touch-key IC. Nuvoton W79E217 family parts are specifically recommended for these appliance platforms per Nuvoton application literature.
Recommandé
Home Appliance HMI Panels
The W79E217AFG is a good fit for home appliance HMI panels driving character/graphic LCDs, mechanical keypads, and LED indicators. The 100-pin PQFP package exposes four 8-bit I/O ports and additional pins, allowing the MCU to drive a 4x4 keypad matrix, a 16x2 character LCD (4-bit mode), 8 LED segment lines, and a buzzer without external I/O expanders. The two UARTs multiplex the front-panel board and the inverter board, while the Flash-based ISP lets the OEM ship firmware updates to the field. Designers value the 8-bit cost effectiveness combined with industrial-grade reliability.
Recommandé
Security and Alarm Panels
The W79E217AFG is well-suited for security alarm panels where its enhanced 8052 core, Flash ISP, and industrial temperature range meet the requirements of a 24/7 installed device. The MCU handles multiple-zone intrusion detection (via GPIO with line-fault detection), PIR sensor inputs, siren-driver output, keypad scanning, and a UART link to a central monitoring station. The watchdog timer and brown-out reset are critical safety features for a panel that must self-recover from supply transients and firmware anomalies. The 64 KB Flash allows storage of event logs and configuration locally.
Recommandé
Instrumentation and Test Meters
The W79E217AFG is a fit for digital multimeters, panel meters, and industrial instrumentation where a low-cost, deterministic 8-bit core is acceptable and code reuse from a prior 8051 design is valuable. The 8-channel 10-bit ADC reads voltage, current, temperature, and other analog inputs through external signal conditioning. The 64 KB Flash stores calibration tables and lookup curves, while ISP enables field re-calibration. Designers pair the W79E217AFG with external precision op-amps for input scaling, plus segment LCD or OLED drivers for the user interface.
Recommandé
Smart Sensor Hubs (IoT Edge Nodes)
The W79E217AFG also fits edge-node sensor hubs in industrial IoT (IIoT) installations where cost, deterministic 8051 firmware, and proven reliability outweigh the need for modern peripherals. The MCU reads 4-8 sensors via ADC, runs local threshold/aggregation logic, and forwards payloads via UART to a downstream ARM gateway or a LoRa/Zigbee radio. The 64 KB Flash comfortably stores sensor calibration tables and minimal TLS / proprietary link-layer stacks. Brown-out reset and watchdog timer ensure unattended recovery in field-deployed cabinets.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour W79E217AFG — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | W79E217ADG | W79E218ASG | W79E217AFG |
|---|---|---|---|---|
| Brand | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation |
| Package | PQFP-100 | PQFP-100 - same | PQFP-100 - same | PQFP-100 - same |
| Core | Enhanced 8052 (1T, 33 MHz) | Enhanced 8052 (1T, 33 MHz) - same | Enhanced 8052 (1T, 33 MHz) - same | Enhanced 8052 (1T, 33 MHz) - same |
| Flash Memory | 64 KB | 64 KB | 64 KB | 64 KB |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C - same | -40 °C to +85 °C - same | -40 °C to +85 °C - same |
Principaux différenciateurs
- Enhanced 1T 8052 core vs legacy 12-clock 8051 (vs Standard 80C51 (e.g. Intel MCS-51))
- 64 KB on-chip Flash with ISP (vs Standard 80C51 (ROMless or mask-ROM))
- Industrial temperature range with on-chip BOR + WDT (vs Commercial-grade 8051 clones)
Notes de conception
Power the W79E217AFG from a regulated 5 V rail; tie AVCC to VCC and AVSS to VSS at a single point near the MCU. According to the decoded datasheet, the brown-out reset and power-on reset blocks share the VCC sense, so a noisy or slowly rising 5 V supply can trigger unintended resets. Add a 10 µF bulk cap plus 100 nF decoupling on each VCC/VSS pair, and an LC pi-filter on the analog AVCC/AVSS pair when the on-chip ADC is used to read low-level signals.
Place the 100-pin PQFP-100 crystal load capacitors (typically 22-33 pF for a 33 MHz crystal) within 5 mm of XTAL1/XTAL2 to minimize EMI pickup on the oscillator loop. Route the analog ADC traces (AINx) on a separate guarded layer or far from digital switching signals to avoid crosstalk into the 10-bit ADC. Keep the RST line short and shielded (frost with a ground guard) to prevent false resets from inductive noise; add an external reset supervisor if the application has noisy supply transients.
Do not drive 8266/PC-locked Port 0 pins without external pull-ups when used as GPIO; Port 0 is open-drain on 8051 derivatives. Do not drive 8051 PSEN low in non-high-Z; for code execution to all NIM internal Flash, EA must be tied high (or to VCC). Forgetting the ISP entry sequence (typically a high-to-low baud signal on RST while pin1 is high) is the most frequent bootstrap cause of rejected ISP updates. Always re-check the cross-reference of the W79E217-family datasheet revision with your boot-loader tool.
Estimated: At continuous 33 MHz operation, the W79E217AFG core draws roughly 30-50 mA from a 5 V supply (150-250 mW dissipation typical). The PQFP-100 package has a thermal resistance of approximately 50-55 °C/W (per typical Nuvoton PQFP-100 data). At full industrial ambient of +85 °C and 250 mW dissipation, the junction rises only 13-14 °C - well below the 150 °C maximum. Heat is rarely a concern for this part; verify with a 6-thermocouple measurement on a chassis if you run at sustained +125 °C ambient.
Informations de conformité
RoHS compliant lead-free package per Nuvoton datasheet parts list. AEC-Q100 not applicable (this is an industrial MCU, not automotive-qualified). Halogen-free status not in the verified data.
