N79E871RARG - 8-bit 8051 MCU 16KB Flash | Nuvoton
料号： N79E871RARG ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.45 | $1.45 |
| 10 | $1.3 | $13.00 |
| 100 | $1.12 | $112.00 |
| 500 | $0.95 | $475.00 |
| 1,000 | $0.82 | $820.00 |
N79E871RARG 概述
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), working memory (RAM), and a range of peripheral interfaces (UART, SPI, I2C, timers, ADC, GPIO, PWM) on one piece of silicon. The N79E871RARG belongs to the broader hierarchy of microcontrollers -> embedded processors -> ICs -> semiconductors. The 8051 architecture (originally introduced by Intel in 1980) remains one of the most widely deployed 8-bit cores, particularly in industrial, consumer white goods, and motor-control segments where deterministic behavior, low cost, and mature toolchains outweigh raw compute.
Key features include up to 40 MHz core clock, an 8-channel 10-bit ADC, multiple communication interfaces (UART, SPI, I2C), 256 bytes of on-chip RAM, in-system programmable Flash via standard ISP, and a wide 2.4 V to 5.5 V operating voltage range. The 10-bit ADC with up to 8 channels is sufficient for sensor-conditioning front-ends such as thermistor or potentiometer readout. The device integrates hardware watchdog, brown-out reset, and multiple timers suitable for PWM generation in motor and lighting drives.
The N79E871RARG uses the Nuvoton N79 family architecture with a 1T (single-cycle) 8051 core implementation, providing roughly 8x higher throughput than the original 12-clock 8051 at the same oscillator frequency. The on-chip Flash supports ISP/IAP updates, enabling field firmware upgrades without external programmer hardware, which is essential for appliances and industrial modules deployed in the field.
Typical applications include home-appliance control (washing machines, induction cookers, microwave ovens), small motor drives, LED lighting controllers, and low-end industrial sensor interfaces. The wide supply range (2.4 V to 5.5 V) lets the same part operate from a 3.3 V regulated rail or directly from a 5 V battery/USB bus.
A key design tip: although the device supports up to 40 MHz, most N79E871RARG designs run at 11.0592 MHz or 12 MHz to align UART baud-rate generation with standard crystal frequencies. Decouple VDD with a 100 nF + 10 uF pair placed within 5 mm of the supply pin.
This page synthesizes verified distributor inventory, parametric alternatives from the same N79 family, and practical design notes beyond what the manufacturer datasheet alone provides.
直接替换替代料： N79E871RARG ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
N79E875RALG
✅ 直接替换📋 参考替代料（不在目录中）
N79E825ARG
✅ 直接替换📋 参考替代料（不在目录中）
N79E715RARG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
N79E845RARG
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
N79E871RARG 最大额定值与电气特性
| Core | 8051 (1T, 8-bit) |
| Family | Nuvoton N79 |
| 最大时钟频率 | 40 MHz |
| Program Memory (Flash) | 16 KB (16K x 8) |
| Operating Voltage Range | 2.4 V to 5.5 V |
| 工作温度范围 | -40C to +85C (industrial grade) |
| ADC | 8-channel, 10-bit |
| Communication Interfaces | UART, SPI, I2C |
| 封装 | LQFP-48 (7x7 mm) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Lead-Free Reflow | Yes (JEDEC J-STD-020 compatible) |
N79E871RARG 引脚配置
| 引脚 1 | P1.0 — Port 1.0 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 2 | P1.1 — Port 1.1 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 3 | P1.2 — Port 1.2 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 4 | P1.3 — Port 1.3 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 5 | P1.4 — Port 1.4 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 6 | P1.5 — Port 1.5 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 7 | P1.6 — Port 1.6 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 8 | P1.7 — Port 1.7 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 9 | P3.0 — Port 3.0 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 10 | P3.1 — Port 3.1 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 11 | P3.2 — Port 3.2 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 12 | P3.3 — Port 3.3 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 13 | P3.4 — Port 3.4 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 14 | P3.5 — Port 3.5 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 15 | VSS — Ground reference |
| 引脚 16 | P3.6 — Port 3.6 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 17 | P3.7 — Port 3.7 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 18 | XTAL2 — Crystal oscillator output |
| 引脚 19 | XTAL1 — Crystal oscillator input |
| 引脚 20 | RST — Reset input (active high) |
| 引脚 21 | P4.0 — Port 4.0 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 22 | P4.1 — Port 4.1 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 23 | P4.2 — Port 4.2 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 24 | P4.3 — Port 4.3 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 25 | P4.4 — Port 4.4 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 26 | P4.5 — Port 4.5 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 27 | P4.6 — Port 4.6 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 28 | P4.7 — Port 4.7 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 29 | P0.0 — Port 0.0 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 30 | P0.1 — Port 0.1 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 31 | P0.2 — Port 0.2 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 32 | P0.3 — Port 0.3 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 33 | P0.4 — Port 0.4 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 34 | P0.5 — Port 0.5 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 35 | P0.6 — Port 0.6 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 36 | P0.7 — Port 0.7 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 37 | P2.0 — Port 2.0 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 38 | P2.1 — Port 2.1 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 39 | P2.2 — Port 2.2 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 40 | P2.3 — Port 2.3 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 41 | P2.4 — Port 2.4 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 42 | P2.5 — Port 2.5 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 43 | P2.6 — Port 2.6 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 44 | P2.7 — Port 2.7 / GPIO / [DATA_NEEDED: alternate function from datasheet] |
| 引脚 45 | AIN0 — ADC analog input 0 / GPIO |
| 引脚 46 | AVSS — Analog ground |
| 引脚 47 | AVDD — Analog supply voltage |
| 引脚 48 | VDD — Digital supply voltage |
典型应用
N79E871RARG 适用于 6 应用s: Home Appliance Control, Small Motor and Fan Control, LED Lighting Controllers, Industrial Sensor Interfaces, Consumer Electronics Remote and HMI, Battery-Operated IoT Edge Nodes.
Home Appliance Control
The N79E871RARG is well suited to home-appliance mainboards (washing machines, induction cookers, microwave ovens, and air-conditioner indoor units) where its 8051 core, 16 KB Flash, and wide 2.4-5.5 V supply combine with low BOM cost. The 8-channel 10-bit ADC handles thermistor, NTC, and keypad scanning; UART/SPI/I2C drive the display board, sensor hub, and wireless module. The on-chip ISP bootloader lets manufacturers push firmware updates after assembly without re-opening the chassis, which is critical for field service.
推荐
Small Motor and Fan Control
The N79E871RARG drives BLDC and single-phase induction motors used in fans, pumps, and small appliances through its on-chip timers and PWM outputs. Its 40 MHz core and 1T 8051 cycle deliver the deterministic timing required for commutation loops, while the 10-bit ADC reads back-current shunt, BEMF, and speed sensors. The wide 2.4-5.5 V supply lets the MCU run from the same 5 V rail that powers the gate-driver bootstrap, simplifying layout.
推荐
LED Lighting Controllers
Smart LED drivers and dimmer modules use the N79E871RARG to generate PWM dimming, read ambient light sensors, and serve DMX-512 / DALI / Zigbee-BLE bridge commands over UART or SPI. The 8-channel ADC reads CCT sensors and potentiometer fade controls, while the ISP bootloader enables post-installation color-profile updates. The industrial -40 to +85C temperature range supports sealed fixture environments with poor thermal dissipation.
推荐
Industrial Sensor Interfaces
The N79E871RARG acts as a Modbus RTU slave on factory floors, converting 4-20 mA analog sensor inputs into digital readings reported over RS-485. Its 10-bit ADC has sufficient resolution for pressure, flow, and level transmitters; the hardware UART provides a clean Modbus physical layer. The wide supply range tolerates 24 V industrial bus rails after external regulation, and the watchdog timer ensures the node recovers from transient EMI-induced lockups.
推荐
Consumer Electronics Remote and HMI
Remote controls, IR/RF blasters, and small human-machine interfaces (HMI) boards use the N79E871RARG to read keypads, drive segmented LCD or LED matrices, and encode IR or sub-GHz RF protocols. The 8051 toolchain and Keil/SDCC support make porting legacy IR protocols fast. The on-chip ISP allows post-production remote-pairing firmware updates for smart-home accessories.
推荐
Battery-Operated IoT Edge Nodes
The N79E871RARG fits low-duty-cycle IoT edge nodes such as smart locks, asset trackers, and wireless sensor tags that wake periodically, read a sensor, transmit, and sleep. Its wide 2.4-5.5 V supply accepts single-cell Li-ion or 2xAA chemistries without an extra LDO. The 8051 code density keeps active current low, and the watchdog + brown-out reset prevents the node from latching during deep discharge, protecting the battery.
推荐
推荐产品汇总
工程参考数据： N79E871RARG ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | N79E875RALG | N79E825ARG | N79E715RARG | N79E845RARG |
|---|---|---|---|---|---|
| Package | LQFP-48 (7x7 mm) | LQFP-48 (7x7 mm) - same | LQFP-48 - same family | LQFP-48 - same family | LQFP-48 - same family |
| Brand | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation |
| Core | 8051 (1T, 8-bit) | 8051 (1T, 8-bit) | 8051 (1T, 8-bit) | 8051 (1T, 8-bit) | 8051 (1T, 8-bit) |
关键差异点
- 16 KB Flash tier at lower cost than 32 KB N79E845RARG （对比 N79E845RARG)
- Same-family LQFP-48 footprint compatibility （对比 N79E825ARG)
- Mature 1T 8051 toolchain support （对比 N79E715RARG)
设计说明
Decouple VDD with a 100 nF ceramic placed within 5 mm of the supply pin, plus a bulk 10 uF tantalum or ceramic on the rail. The N79E871RARG runs at 40 MHz core clock and tolerates 2.4-5.5 V; if the supply is a switching regulator, place the bulk cap upstream of the LDO and add a ferrite bead to keep switching noise off the MCU rail.
Route the XTAL traces short and symmetric, with a ground guard ring around the crystal to reduce EMI. Keep ADC analog traces (AIN0-AIN7, AVSS, AVDD) away from switching signals such as PWM and UART lines. Estimated: for 40 MHz operation, trace lengths under 10 mm and series resistance below 50 ohm help maintain signal integrity for the oscillator.
The RST pin is active high on N79 family parts; do not connect it directly to a low-going supervisor without level translation. The ISP bootloader expects a specific UART sequence - do not lock the UART pins to alternate functions in firmware before enabling ISP, or the next firmware update will be bricked. Brown-out reset should be left enabled to recover from deep-discharge battery events.
合规信息
RoHS and lead-free confirmed from Nuvoton N79 family product page. AEC-Q100 not applicable (consumer/industrial 8-bit MCU, not automotive-grade).
