R5F212A8SNFA#V2 - R8C/2A 16-bit MCU 64KB Flash 20MHz | Renesas
料号： R5F212A8SNFA#V2 ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.95 | $6.95 |
| 10 | $6.2 | $62.00 |
| 100 | $5.45 | $545.00 |
| 500 | $4.85 | $2,425.00 |
| 1,000 | $4.3 | $4,300.00 |
R5F212A8SNFA#V2 概述
An R8C/Tiny microcontroller (MCU) is a 16-bit single-chip microcontroller from Renesas' R8C family that combines a compact, high-efficiency CPU core with rich on-chip peripherals including timers, A/D converters, communication interfaces, and watchdog functions. Within the broader taxonomy, R8C MCUs sit between 8-bit legacy MCUs (such as the 78K0 and RL78 base series) and 32-bit ARM Cortex-M devices, targeting cost-sensitive, deterministic real-time control applications. The R8C core implements sophisticated instructions and addressing modes that achieve high code density, reducing program memory consumption versus typical 8-bit CISC cores.
The R5F212A8SNFA#V2 key specifications include 64 KB (64K x 8) flash program memory, 2 KB of RAM, 16-bit CPU architecture, 20 MHz maximum operating frequency, 64-pin LQFP surface-mount package, and an operating temperature range of -20C to +85C. The integrated R8C core supports a C-based development environment and is widely deployed in white goods, motor control, and industrial sensor applications. Peripherals typically include multi-channel 10-bit A/D converters, 8/16-bit timers, UART, I2C, and SSU (Synchronous Serial Communication Unit) interfaces.
This part is intended only for customers who have already adopted R8C/2A in production; Renesas officially recommends the RL78/G14 family for new designs. Engineers selecting R5F212A8SNFA#V2 should confirm longevity of supply for legacy R8C/2A designs and validate peripheral availability against the specific R5F212A8 sub-group datasheet revision.
Typical applications include home appliance control boards, industrial sensor signal conditioning, HVAC fan/valve controllers, low-end motor drivers, and consumer device human-machine interface logic. A core design consideration is supply-chain continuity - because the R8C/2A group is in legacy support, designers should evaluate second-source cross references and confirm lifetime-buy programs before committing to new product runs. This page synthesizes distributor pricing, parametric verification, and design notes not consolidated in the manufacturer datasheet, providing engineers with practical context for legacy R8C/2A procurement and migration planning to RL78.
直接替换替代料： R5F212A8SNFA#V2 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： R5F212A8SNFA#V2 （相同外形与封装尺寸） ——差异在于 Package, ADC, Core Architecture, Maximum Clock Frequency, Operating Temperature Range.
快速对比工具——选择替代料号进行并排对比：
R5F212A7SNFA#V2
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
R5F212A4SNFA#V2
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
R5F212B8SNFA#V2
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
PIC32MX550F256L-I/PT
✅ 直接替换✓ 有现货
$3.78 / 个
查看数据手册 →PIC32MX270F512L-50I/PF
✅ 直接替换✓ 有现货
$5.2 / 个
查看数据手册 →R5F212A8SNFA#V2 最大额定值与电气特性
| CPU Core | R8C/Tiny Series (16-bit) |
| Family | R8C/2A Group |
| Program Memory (Flash) | 64 KB (64K x 8) |
| RAM | 2 KB |
| 最大时钟频率 | 20 MHz |
| 数据总线宽度 | 16-bit |
| 封装 | 64-LQFP (14x14 mm) |
| 安装类型 | Surface Mount |
| 工作温度范围 | -20C to +85C |
| On-chip Peripherals | Timers, A/D converter, UART, I2C, SSU, Watchdog (per R8C/2A group datasheet) |
| Process Technology | High-performance silicon gate CMOS |
R5F212A8SNFA#V2 引脚配置
| 引脚 1 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 2 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 3 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 4 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 5 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 6 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 7 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 8 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 9 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 10 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 11 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 12 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 13 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 14 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 15 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 16 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 17 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 18 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 19 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 20 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 21 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 22 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 23 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 24 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 25 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 26 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 27 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 28 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 29 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 30 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 31 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 32 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 33 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 34 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 35 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 36 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 37 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 38 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 39 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 40 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 41 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 42 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 43 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 44 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 45 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 46 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 47 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 48 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 49 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 50 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 51 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 52 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 53 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 54 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 55 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 56 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 57 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 58 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 59 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 60 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 61 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 62 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 63 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
| 引脚 64 | [DATA_NEEDED] — Pin function per R8C/2A datasheet |
典型应用
R5F212A8SNFA#V2 适用于 6 应用s: White Goods Control Boards, HVAC Fan and Valve Controllers, Industrial Sensor Signal Conditioning, Low-End Motor Drivers, Consumer Device HMI Logic, Legacy Industrial Control Boards.
White Goods Control Boards
The R5F212A8SNFA#V2's 20 MHz R8C core, 64 KB flash, and integrated timers make it well-suited for white goods control boards in washing machines, dishwashers, and microwave ovens. The 16-bit CPU executes real-time motor sequencing, sensor sampling, and user-interface state machines with deterministic timing, while the 2 KB RAM accommodates small operating buffers without external memory. Peripherals such as timers, A/D, and UART enable direct connection to motor drivers, temperature sensors, and front-panel keypads, eliminating the need for external peripheral ICs. The LQFP-64 package provides the I/O count needed for multi-channel H-bridge control and LED feedback indicators typical in appliance designs.
推荐
HVAC Fan and Valve Controllers
In HVAC fan and valve controllers, the R5F212A8SNFA#V2 provides 16-bit processing headroom to run PID loops for temperature regulation while simultaneously servicing communication stacks for BACnet or Modbus. The R8C core's compact instruction set keeps the 64 KB flash budget generous for protocol stacks plus control firmware. Integrated multi-channel A/D converters sample thermistor and pressure sensor inputs, while timer peripherals generate PWM outputs for proportional valve control. The -20C to +85C operating range covers indoor HVAC equipment, and the LQFP-64 footprint fits standard control-board form factors.
推荐
Industrial Sensor Signal Conditioning
Industrial sensor signal-conditioning modules use the R5F212A8SNFA#V2 to digitize analog sensor outputs via on-chip A/D converters and apply linearization, filtering, and scaling in firmware. The 16-bit CPU at 20 MHz is fast enough for moving-average or Kalman filtering at typical industrial sampling rates (1-10 kHz), while the 64 KB flash supports factory calibration tables and look-up routines. UART and I2C peripherals provide connectivity to higher-level PLCs or industrial gateways. The LQFP-64 package offers sufficient I/O for multi-sensor boards, and the CMOS process keeps quiescent current low for loop-powered field instruments.
推荐
Low-End Motor Drivers
Low-end motor driver boards for small BLDC, stepper, and brushed-DC motors use the R5F212A8SNFA#V2 as the supervisory MCU, generating PWM commutation signals and monitoring current feedback. The integrated timers produce center-aligned PWM with dead-time insertion needed for half-bridge drivers, while A/D channels sample shunt-resistor current for closed-loop torque control. The 20 MHz clock and 16-bit ALU provide enough bandwidth for sensorless BEMF zero-crossing algorithms on small fan and pump motors. The 64-LQFP package gives access to the GPIO count required for multi-phase motor control without external I/O expanders.
推荐
Consumer Device HMI Logic
Consumer device human-machine interface (HMI) logic boards rely on the R5F212A8SNFA#V2 to scan keypads, drive 7-segment or dot-matrix displays, and handle rotary-encoder inputs. The integrated timers debounce mechanical switches and generate multiplexed display waveforms without burdening the CPU. The 64 KB flash accommodates multilingual menu structures and configurable behavior profiles, while the 2 KB RAM supports display buffer storage. UART and I2C peripherals enable communication with the main appliance controller or wireless module. The compact LQFP-64 footprint simplifies integration into slim consumer enclosures.
推荐
Legacy Industrial Control Boards
Legacy industrial control boards already in production continue to use the R5F212A8SNFA#V2 because Renesas maintains the R8C/2A group for existing customers. The 16-bit core and 64 KB flash match the firmware requirements established years ago, and Renesas' lifetime-buy programs help mitigate supply-chain risk for industrial equipment with long field-life expectations. The MCU drives digital I/O modules, indicator lamps, relay coils, and serial communication links. Engineers designing new industrial products should consider RL78/G14 as a forward-compatible migration target, while keeping R8C/2A in service for existing field-deployed equipment.
推荐
推荐产品汇总
工程参考数据： R5F212A8SNFA#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 | R5F212A7SNFA#V2 | R5F212A4SNFA#V2 | R5F212B8SNFA#V2 | PIC32MX550F256L-I/PT | PIC32MX270F512L-50I/PF |
|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Microchip Technology | Microchip Technology |
| Package | 64-LQFP (14x14) | 64-LQFP (14x14) - same | 64-LQFP (14x14) - same | 64-LQFP (14x14) - same | 64-LQFP (10x10) - 64-pin LQFP, smaller body | 64-LQFP (10x10) - 64-pin LQFP, smaller body |
| CPU Core | R8C/Tiny 16-bit | R8C/Tiny 16-bit | R8C/Tiny 16-bit | R8C/Tiny 16-bit (2B group) | MIPS M4K 32-bit | MIPS M4K 32-bit |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 50 MHz | 50 MHz |
| Flash Memory | 64 KB | 48 KB | 32 KB | 64 KB | 256 KB | 512 KB |
| RAM | 2 KB | 2 KB | 2 KB | 2 KB | 32 KB | 64 KB |
| Operating Temperature | -20C to +85C | -20C to +85C | -20C to +85C | -20C to +85C | -40C to +85C (industrial) | -40C to +85C (industrial) |
| Lifecycle Status | NRND | NRND | NRND | NRND | Active | Active |
关键差异点
- Higher flash memory within R8C/2A family （对比 R5F212A4SNFA#V2)
- Same R8C/Tiny 16-bit core as the rest of the family （对比 R5F212B8SNFA#V2)
- Lower core performance than 32-bit PIC32 alternatives （对比 PIC32MX550F256L-I/PT)
设计说明
Estimated: The R5F212A8SNFA#V2 is classified as NRND per Renesas' official product page, meaning it is supported only for existing customers and is not recommended for new designs. Engineers should not select this part for new product introductions; instead, evaluate Renesas' RL78/G14 family as the forward-compatible migration path. If the part must be used, engage Renesas early regarding lifetime-buy programs to secure long-term supply.
Estimated: When designing the R8C/2A power rails, place 0.1 uF ceramic decoupling capacitors as close as possible to each VDD/VSS pin pair on the 64-LQFP package, and add a bulk 10 uF capacitor at the regulator output. The R8C core is sensitive to supply ripple during A/D conversion, so a clean analog supply (often a separate LDO output) is recommended for precision analog sampling. Refer to the R8C/2A Group hardware manual for detailed decoupling guidelines.
The 64-pin LQFP (14x14 mm) footprint requires standard JEDEC land patterns. Route the emulator/debugger signals (TOOL0, RESET, VCC, GND) to a dedicated 2.54 mm or 1.27 mm pitch connector at the board edge, and keep traces short to minimize noise coupling during in-circuit programming. Place the oscillator crystal within 5 mm of the MCU's XIN/XOUT pins with a guarded ground plane to ensure stable 20 MHz operation.
合规信息
Compliance information not provided in verified web data. The #V2 suffix typically indicates lead-free/RoHS-compliant per Renesas nomenclature, but confirm with manufacturer material declaration.
