R5F21276SNFP#V2 - 16-bit R8C MCU 32KB Flash 20MHz | Renesas
料号： R5F21276SNFP#V2 ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $2.99 | $1,495.00 |
| 1,000 | $2.65 | $2,650.00 |
R5F21276SNFP#V2 概述
A microcontroller unit (MCU) is a complete computer-on-a-chip that integrates a processor core, program memory (flash), data memory (RAM), and peripheral functions such as timers, serial interfaces, and analog-to-digital converters. Within the semiconductor hierarchy, the R5F21276SNFP#V2 belongs to the general-purpose 16-bit MCU class, positioned between 8-bit MCUs and 32-bit MCUs, and is part of Renesas' R8C Family / R8C/2x Series of cost-sensitive embedded controllers.
Key differentiating specifications include the sophisticated R8C instruction set, which achieves a high level of instruction efficiency for compact, fast-executing code; the 3 V to 5 V supply range, which allows direct operation from both 3.3 V and 5 V systems; and lead-free (#V2 suffix) construction for RoHS-conscious manufacturing. The flash memory supports in-system programming, simplifying field firmware updates.
The device is fabricated using a high-performance silicon gate CMOS process, which combines low power consumption with fast switching speeds. The R8C CPU core executes most instructions in short cycle counts and integrates on-chip peripherals typical of the R8C/27 Group, including timers, serial communication interfaces, and ADC functionality, reducing external component count and board cost in embedded designs.
Typical applications include consumer electronics, home appliance control, industrial sub-systems, and motor control boards. The R8C/27 Group is a proven platform widely used in cost-driven products that require dependable 16-bit control with modest flash capacity.
An important design consideration: Renesas states that the R8C/27 Group is supported only for customers who have already adopted these products, and the RL78/G14 Group is recommended for new designs. Engineers starting a new project should evaluate RL78/G14, while existing users should verify long-term supply.
This page synthesizes distributor pricing, drop-in alternatives within the R8C/27 family, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： R5F21276SNFP#V2 ——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：
R5F21276SNFP#X6
✅ 直接替换📋 参考替代料（不在目录中）
R5F21276SNFP#W4
✅ 直接替换📋 参考替代料（不在目录中）
R5F21277SNFP
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
R5F21275SNFP
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
R5F21272SNFP
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
R5F21276SNFP#V2 最大额定值与电气特性
| Core Processor | R8C (16-bit) |
| Core Size | 16-bit |
| 最大时钟频率 | 20 MHz |
| Program Memory Size | 32 KB (32K x 8) Flash + 2 KB |
| Supply Voltage Range | 3 V to 5 V |
| Series | R8C/2x / R8C/27 |
| 封装 | 32-LQFP (7 x 7 mm), molded-plastic |
| 安装类型 | Surface Mount |
| Process Technology | High-performance silicon gate CMOS |
| Lead Free | Yes (#V2 suffix) |
| RoHS 状态 | Lead free per Mouser listing |
| Design Recommendation | R8C/27 supported for existing customers only; RL78/G14 recommended for new designs |
R5F21276SNFP#V2 32-lqfp (7 x 7 mm), molded-plastic 引脚配置指南
R5F21276SNFP#V2（32-lqfp (7 x 7 mm), molded-plastic 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： R5F21276SNFP#V2.
请参阅 数据手册 以查看完整引脚配置。
典型应用
R5F21276SNFP#V2 适用于 6 应用s: Consumer Electronics Control, Home Appliance Control, Industrial Sub-System Control, Motor Control Boards, Battery-Powered Portable Devices, Sensor Interface Nodes.
Consumer Electronics Control
The R5F21276SNFP#V2 suits cost-sensitive consumer product control boards such as small appliances, remote controls, and personal-device front panels. Its R8C core at 20 MHz executes control loops and UI scan routines with high instruction efficiency, while 32 KB of flash comfortably holds application firmware with UI logic and communication handlers. The 3 V to 5 V supply range allows direct operation from two AA cells or a 5 V USB-derived rail without an extra regulator stage. The 32-pin LQFP keeps PCB area small in handheld enclosures, and lead-free construction meets consumer-market RoHS expectations. Because the group is NRND, use it for sustaining existing consumer products rather than launching new platforms.
推荐
Home Appliance Control
Washer, rice cooker, fan, and small kitchen appliance controllers benefit from the R5F21276SNFP#V2's blend of a 16-bit R8C core, integrated timers, and analog peripherals within a single 32-LQFP device. The 5 V-tolerant supply simplifies designs sharing a transformer-derived 5 V rail with relay drivers and LED indicators. The 32 KB flash accommodates state machines, keypad debouncing, and buzzer/timer sequencing, while the sophisticated R8C instruction set keeps interrupt latency predictable for precise heater or motor timing. Its proven field history in appliance platforms reduces requalification risk for service parts. New appliance platforms should instead target RL78/G14, but existing R8C/27-based appliance controllers can be sustained with this part and its #X6/#W4 packing variants.
推荐
Industrial Sub-System Control
In factory equipment, the R5F21276SNFP#V2 serves as a local node controller for sensors, limit switches, and actuator interfaces in industrial sub-systems. The 16-bit R8C core at 20 MHz handles sensor polling and serial reporting, and the wide 3 V to 5 V operating range tolerates noisy 5 V industrial supply rails with adequate margin. The on-chip peripherals of the R8C/27 Group reduce the external BOM, improving reliability in electrically harsh environments. The molded-plastic 32-LQFP supports standard SMT assembly on industrial-grade boards. Since Renesas supports this group only for existing adopters, industrial users should secure last-time-buy quantities or plan migration to RL78/G14 for new production introduction.
推荐
Motor Control Boards
Small DC fan and brushed-motor control boards leverage the R5F21276SNFP#V2's timers for PWM generation and its fast interrupt response for tachometer feedback counting. The 20 MHz R8C core provides sufficient headroom for closed-loop speed regulation at low-to-medium control bandwidths, and 32 KB flash holds the regulator, protection, and communication firmware simultaneously. Operating at 5 V simplifies interfacing with gate drivers and H-bridge inputs that expect 5 V logic levels. The compact 32-LQFP (7 x 7 mm) fits onto small driver PCBs within the fan housing or appliance chassis. For FOC-class motor control requiring more compute, evaluate DSPIC33 devices instead; this part is best for simple speed-control applications.
推荐
Battery-Powered Portable Devices
The R5F21276SNFP#V2's silicon gate CMOS process and 16-bit core make it practical for battery-operated instruments and portable measurement gadgets. The 3 V minimum supply allows operation from a single lithium cell via a low-cost regulator or even direct connection in 3 V systems, while the CMOS process limits idle power relative to older bipolar-era designs. The 32 KB flash supports periodic firmware updates in the field through in-system programming, a practical advantage for deployed portable devices. Designers should apply the R8C/27 standby modes to minimize average current and size the battery accordingly. Because the device is NRND, portable-device designers building new products should first compare RL78/G14 low-power features before committing.
推荐
Sensor Interface Nodes
As a sensor acquisition node, the R5F21276SNFP#V2 conditions and digitizes analog sensor outputs using the R8C/27 Group's on-chip ADC, then forwards readings over its serial interface. The 16-bit core executes scaling and filtering algorithms efficiently, and the 32 KB flash provides room for lookup tables and linearization code for thermistors or pressure sensors. The 5 V operation matches classic ratiometric sensor bridges, and the 32-pin LQFP offers enough GPIO to drive status LEDs and a local keypad alongside the sensor front end. Legacy automation and building-control installations already standardized on R8C silicon can sustain spares with this device. Verify the exact ADC channel count and resolution in the datasheet before finalizing the analog front-end design.
推荐
推荐产品汇总
工程参考数据： R5F21276SNFP#V2 ——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 | R5F21276SNFP#X6 | R5F21276SNFP#W4 | R5F21277SNFP |
|---|---|---|---|---|
| Package | 32-LQFP (7 x 7 mm) | 32-LQFP (7 x 7 mm) - same | 32-LQFP (7 x 7 mm) - same | 32-LQFP (7 x 7 mm) - same |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Core / Max Frequency | R8C 16-bit / 20 MHz | R8C 16-bit / 20 MHz | R8C 16-bit / 20 MHz | R8C 16-bit / 20 MHz |
| Supply Voltage | 3 V to 5 V | 3 V to 5 V | 3 V to 5 V | 3 V to 5 V |
| Lifecycle Status | NRND (RL78/G14 recommended) | NRND (same group) | NRND (same group) | NRND (R8C/27 group) |
关键差异点
- Same-die packing-code flexibility （对比 R5F21276SNFP#X6)
- Pin-compatible family scaling （对比 R5F21277SNFP)
- Honest trade-off: NRND status （对比 RL78/G14 family)
设计说明
Treat the R8C/27 Group as a sustaining platform, not a growth platform. Renesas explicitly states the group is supported only for customers who have already adopted these products and recommends RL78/G14 for new designs. Before committing production volume, confirm stock across distributors (Octopart showed 4 sources) and negotiate last-time-buy quantities. Also match the ordering suffix exactly (#V2 vs #X6 vs #W4) - these denote different packing/qualification flows and are not freely interchangeable in all supply agreements.
The 3 V to 5 V supply range is a key design asset: run the MCU directly from a 5 V rail when interfacing relays and H-bridges, or from 3.3 V when pairing with modern low-voltage peripherals. When sharing rails with inductive loads such as relays or motors, add local decoupling (100 nF ceramic at the VDD pin plus a bulk capacitor at the board entry) and a TVS element on the supply input. Verify the exact maximum VDD and current ratings in the manufacturer datasheet rather than relying on secondary aggregator data.
The 32-LQFP (7 x 7 mm) footprint uses standard 0.8 mm pin pitch, so conventional SMT assembly with solder-paste stencil apertures at 1:1 ratio works well. Place the 100 nF decoupling capacitor within 2-3 mm of the VDD pins and connect the ground return with short, wide traces to the ground plane. Keep crystal/traces short and guarded by ground if an external clock circuit is used. Because footprint compatibility exists across R8C/27 family members, laying out for the same 32-LQFP pattern preserves second-source flexibility within the family.
合规信息
Mouser listing describes R5F21276SNFP#V2 as 'lead free'. REACH, halogen-free, and conflict-minerals status not stated in verified data - obtain Renesas material declaration certificates for formal compliance documentation.
