R5F211B1DD#U0 - 16-Bit 20MHz MCU with 4KB Flash | Renesas
料号： R5F211B1DD#U0 ✗ 停产R5F211B1DD#U0 概述
A microcontroller is a programmable embedded-control IC that combines a CPU core, memory, I/O, timers, serial interfaces, and other peripherals on one device. The R8C/1B family is based on the Renesas R8C/Tiny Series architecture and is fabricated using a high-performance silicon-gate CMOS process. This architecture supports compact control systems in which program code and data are stored locally rather than in an external processor.
Key device characteristics include 4KB of Flash program memory, 384 x 8 bits of RAM, 13 general-purpose I/O lines, and operation up to 20MHz. The internal oscillator removes the need for an external clock source in suitable designs, while the 2.7V to 5.5V operating range supports both 3.3V and 5V embedded systems. The 20-pin SDIP package provides through-hole accessibility for prototyping, education, and legacy equipment.
The R8C/1B Group is described by Renesas as a non-promotion family, and Renesas recommends the RL78/G12 Group for new designs. This makes the R5F211B1DD#U0 most appropriate for maintenance of existing R8C/1B equipment, particularly where software, peripheral configuration, and the existing 20-pin SDIP footprint must be preserved. New products should evaluate the recommended RL78/G12 family before committing to this legacy MCU.
Typical uses include industrial control modules, instrument-control boards, embedded teaching systems, and legacy automation products. A replacement must match the original device's pinout, clock behavior, memory map, peripheral functions, electrical limits, and firmware configuration. Matching only the R8C family name is insufficient for a drop-in replacement.
The principal design consideration is that this is a legacy, non-promotion MCU. Before beginning a redesign, confirm lifecycle expectations, firmware portability, available inventory, and whether the required board revision can accommodate a newer package or recommended MCU family. This page consolidates the verified specifications, commercial availability, selection guidance, and source links for engineers evaluating maintenance or replacement decisions.
直接替换替代料： R5F211B1DD#U0 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料R5F211B1DD#U0 最大额定值与电气特性
| Product Type | 16-bit microcontroller |
| CPU Core | R8C CPU core |
| Product Series | R8C/1B Group |
| Program Memory Size | 4KB (4K x 8) |
| Program Memory Type | Flash |
| RAM Size | 384 x 8 bits |
| Maximum CPU Frequency | 20MHz |
| Operating Supply Voltage Range | 2.7V to 5.5V |
| Number of I/O Ports | 13 |
| Oscillator Type | Internal |
| 封装 | 20-SDIP (0.300 inch, 7.62mm pitch) |
| Packaging Type | Tube |
| 安装方式 | Through-hole |
| 引脚数 | 20 pins |
| Process Technology | High-performance silicon gate CMOS |
| Product Promotion Status | Non Promotion |
| Recommended Family for New Designs | RL78/G12 Group |
| RoHS 状态 | Compliant |
R5F211B1DD#U0 20-sdip (0.300 inch, 7.62mm pitch) 引脚配置指南
R5F211B1DD#U0（20-sdip (0.300 inch, 7.62mm pitch) 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： R5F211B1DD#U0.
请参阅 数据手册 以查看完整引脚配置。
典型应用
R5F211B1DD#U0 适用于 6 应用s: Legacy Industrial Control Modules, Instrument and Measurement Control, Educational R8C Processor Platforms, Embedded System Legacy Refresh, Simple Peripheral Control Boards, Automotive and Appliance Legacy Electronics.
Legacy Industrial Control Modules
The R5F211B1DD#U0 fits maintenance of existing industrial control modules that were designed around an R8C/1B controller. Its 4KB Flash provides room for compact control logic, while 384 x 8 bits of RAM and 13 I/O ports support basic state machines, sensing, and actuator-control tasks. The 20MHz R8C core provides more performance than an 8-bit design, and the 2.7V to 5.5V range accommodates common 3.3V and 5V control boards. Because this family is non-promotion, the MCU is best used where a board and firmware redesign would create excessive validation risk. A maintenance engineer should preserve the original package, clock configuration, peripheral map, and programming method rather than assume that a newer MCU is interchangeable.
推荐
Instrument and Measurement Control
The R5F211B1DD#U0 is appropriate for instrument-control boards where local sequencing, simple data acquisition, and front-panel or sensor I/O must continue without a full redesign. The 13 available I/O lines can support digital interfaces and discrete controls, while 384 x 8 bits of RAM provides limited working space for acquisition and communication routines. Its 20MHz internal-clock R8C core is suitable for deterministic supervisory tasks in established equipment. The 20-pin SDIP format also simplifies replacement on through-hole legacy boards. Engineers should verify the exact peripheral allocation and pin functions from the manufacturer datasheet before assigning a new board function, particularly where accuracy, interrupt timing, or serial communication requirements exceed the verified published specifications.
推荐
Educational R8C Processor Platforms
The R5F211B1DD#U0 supports educational and prototype work involving the 16-bit R8C architecture because it combines a 20MHz core, 4KB of Flash, 384 x 8 bits of RAM, and 13 I/O ports in an accessible 20-pin SDIP package. Through-hole mounting makes the device convenient for breadboards, training boards, and manually soldered laboratory fixtures, while the internal oscillator simplifies initial setup. The MCU is best presented as a legacy architecture because Renesas recommends RL78/G12 for new designs. For instruction, the instructor should document the required R8C toolchain, programming connector, and memory limitations, and students should avoid assuming that software or peripheral mappings transfer directly to newer Renesas MCU families.
推荐
Embedded System Legacy Refresh
The R5F211B1DD#U0 is useful for a controlled embedded-system refresh when qualified production hardware already depends on its 20-pin SDIP footprint and R8C firmware. Retaining the same MCU can avoid board respin, enclosure changes, and complete software requalification. Its 4KB program memory and 384 x 8 bits of RAM must be sufficient for the intended application, and the design must remain within the verified 2.7V to 5.5V supply range. This approach is preferable only for short continuity programs. For a longer product life, engineers should concurrently evaluate the RL78/G12 family, assess tooling and driver changes, and determine whether a transitional PCB supporting both devices would reduce long-term supply risk.
推荐
Simple Peripheral Control Boards
The R5F211B1DD#U0 can serve as the controller on a small board dedicated to simple peripheral sequencing, status monitoring, and local user-interface functions. Thirteen I/O lines provide a practical interface budget for switches, indicators, relays, and simple sensors, while the 16-bit R8C core and 20MHz operating speed support more capable logic than a basic 8-bit microcontroller. The through-hole 20-SDIP package is particularly useful for industrial control hardware where field replacement and socketed prototyping are valuable. Designers must still confirm timer channels, serial functions, pin multiplexing, and interrupt assignments against the manufacturer datasheet. They should also provide appropriate decoupling, programming access, and reset circuitry according to the device's electrical requirements.
推荐
Automotive and Appliance Legacy Electronics
The R5F211B1DD#U0 may be used in the repair or continuity of older appliance and automotive electronic modules when the original controller is required for exact board compatibility. Its 2.7V to 5.5V operating range overlaps common embedded supply systems, and the 20MHz 16-bit core is adequate for supervisory control, while the internal oscillator avoids an external crystal. However, the provided data does not verify an automotive temperature grade or AEC-Q100 qualification, so it must not be assumed suitable for new safety- or automotive-grade designs. Technicians should confirm the original manufacturer marking, temperature requirements, protection circuitry, and stored firmware before installation, and use a verified original or traceable authorized-channel component.
推荐
工程参考数据： R5F211B1DD#U0 ——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 |
|---|---|
| Package | 20-SDIP (0.300 inch, 7.62mm pitch) |
| Brand | Renesas Electronics |
| CPU Core | 16-bit R8C |
| Maximum CPU Frequency | 20MHz |
| Program Memory | 4KB Flash (4K x 8) |
| RAM | 384 x 8 bits |
| Operating Voltage Range | 2.7V to 5.5V |
| Number of I/O Ports | 13 |
| Oscillator Type | Internal |
| Packaging | Tube |
| Promotion Status | Non Promotion |
关键差异点
- Exact legacy R8C/1B configuration for continuity of supply （对比 No verified drop-in alternative)
- Through-hole package suited to legacy board maintenance （对比 No verified drop-in alternative)
- Documented 16-bit embedded-control capability （对比 No verified drop-in alternative)
- Simple internal-clock implementation （对比 No verified drop-in alternative)
设计说明
Do not treat an MCU from the same R8C family as a drop-in replacement without checking the complete device ordering information. For R5F211B1DD#U0, the verified baseline is 4KB Flash, 384 x 8 bits of RAM, 13 I/O ports, a 20MHz maximum clock, a 2.7V to 5.5V supply range, an internal oscillator, and a 20-pin SDIP footprint. A candidate with a different pin count, memory map, peripheral arrangement, or operating grade can require hardware and firmware changes.
Preserve the original through-hole land pattern, pin-1 orientation, and board-level programming access when replacing R5F211B1DD#U0. The verified package is 20-SDIP with 0.300-inch, 7.62mm pitch. Before committing to a substitute, compare every supply, reset, oscillator, I/O, and programming signal in the manufacturer package drawing. Also inspect whether the original assembly relies on socketed parts, conformal coating, or a programmed MCU, because those manufacturing constraints affect whether an exact replacement is practical.
Design and service work around the verified 2.7V to 5.5V operating range and confirm the board's actual supply level at the MCU pins. The R5F211B1DD#U0 uses an internal oscillator, so the original board may not contain an external crystal network; adding one is not a substitute for verifying clock configuration and firmware timing. Use the manufacturer electrical characteristics for input thresholds, output-drive limits, and decoupling requirements because those detailed values were not present in the supplied web data.
Plan for the device's constrained resources: 4KB of Flash and 384 x 8 bits of RAM limit code size, buffers, and stack depth. Existing firmware may also depend on a specific R8C peripheral map, interrupt vector arrangement, and startup sequence. Renesas recommends RL78/G12 for new designs, but a migration should be treated as a new firmware and hardware design unless a specific candidate is verified for pin-to-pin, memory-map, toolchain, and peripheral compatibility.
合规信息
The verified distributor listing states that R5F211B1DD#U0 is RoHS compliant. The supplied data does not verify REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. The official Renesas page identifies the R8C/1B Group as non-promotion and recommends RL78/G12 for new designs.
