R5F21144SP#U0 - 16-Bit 20MHz R8C MCU | Renesas Electronics
MPN： R5F21144SP#U0 ✗ 停產R5F21144SP#U0 概覽
A microcontroller is a programmable semiconductor that combines a CPU core, memory, peripheral interfaces, and I/O ports on one integrated circuit. The R5C family belongs to the embedded-processor hierarchy and uses the R8C/Tiny Series CPU core. Compared with an 8-bit MCU, a 16-bit controller can perform arithmetic and address larger data structures more efficiently, while retaining the low cost, low power, and real-time control characteristics expected from a dedicated embedded controller.
Key features include a 20 MHz maximum operating frequency, 16 KB flash program memory organized as 16K x 8, a four-channel 10-bit ADC, and an operating temperature range of -20°C to +85°C. Flash memory allows firmware to be programmed and updated without an external programmable memory device. The 20-LSSOP outline also supports compact PCB layouts where component density and a moderate pin count are important.
The R8C/14 architecture is implemented using a silicon-gate CMOS process and incorporates a high-performance R8C/Tiny Series CPU core with instruction-efficient 16-bit operations. The target includes 13 I/O pins according to its listed device data, leaving sufficient interface capacity for digital control, communications, and analog monitoring. Exact clock, timer, and peripheral configurations should be confirmed against the manufacturer datasheet before final clock-tree and peripheral allocation.
Typical uses include compact industrial controllers, consumer appliances, sensor-interfaces, programmable timers, and embedded equipment requiring modest computation and local data acquisition. The four ADC channels are useful for monitoring temperature, position, pressure, or analog control signals, while the 13 I/O pins support switches, indicators, actuators, and serial or bus-connected peripherals.
Designers should plan decoupling, clock routing, programming access, and mixed-signal grounding carefully. Place input and output capacitors close to the supply pins, route analog inputs away from switching nodes, and preserve clear programming access. Because this R8C/14 group is a non-promotion family for existing adopters, new projects should also evaluate Renesas's recommended RL78/G12 path when long-term new-design support is a priority.
This product page consolidates the verified device specifications, package information, lifecycle position, application guidance, and same-family drop-in options into a practical engineering reference. It also highlights the trade-off between preserving an installed R8C/14 design and moving a completely new design to the manufacturer-recommended RL78/G12 family.
直接替換替代品，適用於 R5F21144SP#U0 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： R5F21144SP#U0 （相同外形與佔位） — 差異在於 Package, Process Technology, Product Type, CPU Core, Flash Memory.
R5F21145SP#U0
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
R5F21146SP#U0
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
R5F21147SP#U0
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
R5F21142SP#U0
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →R5F21144SP#U0 最大額定值與電氣特性
| Product Type | 16-bit R8C/Tiny Series microcontroller |
| CPU Group | R8C/14 |
| Maximum CPU Frequency | 20 MHz |
| Program Memory Size | 16 KB |
| Program Memory Organization | 16K x 8 |
| Program Memory Type | Flash |
| Operating Voltage Range | 2.7 V to 5.5 V |
| ADC Resolution | 10 bit |
| ADC Channels | 4 channels |
| Number of I/O Pins | 13 |
| 封裝 | 20-pin LSSOP, 4.4 mm |
| 工作溫度範圍 | -20°C to +85°C |
| Process Technology | High-performance silicon gate CMOS |
| 安裝類型 | Surface mount |
| RoHS 狀態 | Compliant |
| Lead-Free Status | Pb-free |
| Lifecycle Recommendation | Supported for customers that previously adopted the R8C/14 Group; RL78/G12 recommended for new designs |
R5F21144SP#U0 20-pin lssop, 4.4 mm 腳位配置指南
R5F21144SP#U0（20-pin lssop, 4.4 mm 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： R5F21144SP#U0.
請參閱 資料表 以查看完整腳位配置。
典型應用
R5F21144SP#U0 適用於 6 應用s: Compact Industrial Control, Sensor Interface Module, Programmable Timer and Sequencer, Consumer Appliance Controller, LED Lighting Controller, Battery-Powered Portable Device.
Compact Industrial Control
The R5F21144SP#U0 fits compact industrial controllers that need efficient 16-bit arithmetic without a high-cost processor. Its 20 MHz R8C/14 core supports responsive task scheduling, while 16 KB of flash provides on-device firmware for control logic and state handling. The 13 I/O pins can connect digital inputs, relay or valve drivers, status indicators, and external peripherals. Four 10-bit ADC channels add local analog monitoring without requiring a separate converter. In an industrial design, retain the 2.7 V to 5.5 V operating range, decouple each supply connection, and isolate analog traces from switching nodes. Because the MCU belongs to a non-promotion family, maintenance and product-continuity requirements should be evaluated before committing a new platform.
推薦
Sensor Interface Module
The R5F21144SP#U0 is appropriate for a small sensor-interface module combining analog measurement with local digital processing. Four 10-bit ADC channels can monitor resistive sensors, potentiometers, or externally conditioned analog signals, while 13 I/O pins support sensor enables, alarm outputs, status LEDs, and a host interface. The 16-bit R8C/14 CPU can perform scaling, filtering, calibration, and threshold decisions locally at up to 20 MHz. Place analog inputs away from digital clock and switching traces, provide a stable reference as required by the analog circuitry, and use separate return paths to minimize ground coupling. Firmware should include sensor-range checks and safe defaults for outputs when a channel is outside its valid measurement window.
推薦
Programmable Timer and Sequencer
The R5F21144SP#U0 can implement a programmable timer, event sequencer, or multi-output controller where precise timing and compact logic are more important than large data storage. Its 20 MHz R8C/14 core supports efficient instruction execution, and 13 I/O pins provide enough parallel channels for steps, gates, triggers, and status signals. On-board flash allows operating schedules, calibration tables, or event sequences to be stored locally. Design the timer source and I/O timing budget from the manufacturer clock and peripheral specifications, and avoid routing high-current or inductive drive signals directly through MCU pins. Use suitable driver transistors or interface circuits for relays, motors, and solenoids, and account for their switching transients during PCB layout.
推薦
Consumer Appliance Controller
A 20-pin R8C/14 microcontroller is well matched to compact consumer appliances requiring local control, user inputs, and a small amount of on-board flash. The R5F21144SP#U0 can manage buttons, indicators, relays, motors, and sensor inputs while its 20 MHz core executes control algorithms and interlocks. The 2.7 V to 5.5 V supply range supports common embedded rails, and flash simplifies firmware integration without an external memory component. Keep mains or high-energy switching stages physically separated from the MCU and analog measurement circuitry. Apply proper grounding, transient protection, and isolation practices according to the appliance safety requirements. For a newly launched appliance, compare the established R8C/14 software ecosystem with the manufacturer-recommended RL78/G12 family before finalizing the platform.
推薦
LED Lighting Controller
The R5F21144SP#U0 can serve as the logic controller in a small LED-lighting system where programmable sequences, status feedback, and local timing are required. Its 16-bit processing and 20 MHz clock are suitable for coordinating multiple outputs and user commands, while the 13 I/O pins can drive logic-level control, enable signals, and fault inputs. The four ADC channels may support dimming feedback, current sensing, or temperature monitoring when suitable analog conditioning is included. Keep LED-driver switching loops physically separate from the MCU and analog traces, and use the manufacturer's recommended interface method for dimming or polarity control. Firmware should include fail-safe states for open LEDs, driver faults, and power-loss restart behavior.
推薦
Battery-Powered Portable Device
The R5F21144SP#U0 can support compact battery-powered accessories that require low-cost local control and limited data processing. Its 2.7 V minimum operating voltage permits operation from appropriately regulated low-voltage rails, while flash preserves configuration and firmware without an external memory package. The 13 I/O pins can operate switches, indicators, sensors, and low-power peripherals. To maximize battery life, use the device's low-power operating modes where suitable, disable unused ports, and switch off external analog circuitry when measurements are not required. Validate regulator dropout, quiescent behavior, and wake-up latency against the power-budget requirements. The 20-LSSOP footprint also helps reduce board area in space-constrained portable products.
推薦
推薦產品摘要
工程參考資料，適用於 R5F21144SP#U0 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | R5F21145SP#U0 | R5F21146SP#U0 | R5F21147SP#U0 | R5F21142SP#U0 |
|---|---|---|---|---|---|
| Package | 20-LSSOP, 4.4 mm | 20-LSSOP | 20-LSSOP | 20-LSSOP | 20-LSSOP |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| CPU Group | R8C/14 | R8C family | R8C family | R8C family | R8C family |
| Architecture | 16-bit R8C/Tiny Series | 16-bit R8C/Tiny Series | 16-bit R8C/Tiny Series | 16-bit R8C/Tiny Series | 16-bit R8C/Tiny Series |
主要差異化特點
- Balanced embedded feature set in a compact package (對比R5F21145SP#U0)
- Direct fit for an established 16 KB flash design (對比R5F21142SP#U0)
- Mixed-signal control without an external ADC (對比R5F21147SP#U0)
設計說明
Place all required decoupling capacitors immediately adjacent to the device power and ground pins, with the shortest possible return path. Keep the analog input region away from the R8C oscillator routing and any switching regulator or relay-driver traces. If the four ADC channels are used, route them as a separate group where practical and provide a quiet ground reference to the analog circuitry.
Do not treat a package outline match as sufficient proof that another MCU is a drop-in replacement. Before substituting an R8C/14 family member, compare pin multiplexing, oscillator requirements, memory size, interrupt vectors, timer resources, ADC channels, and startup code. Also verify that the replacement's operating voltage and temperature ratings meet the original design limits.
Use a regulator and capacitor network suitable for the 2.7 V to 5.5 V operating range, including the voltage tolerance of the selected supply rail. Calculate startup current, active current, and peripheral load separately so the worst-case system demand is known. In battery equipment, disable unused ports and external analog blocks, then use the manufacturer power-mode information to validate wake-up behavior and standby consumption.
Preserve the manufacturer's recommended oscillator layout and keep programming or debug-related contacts accessible for production programming and validation. Route high-current LED, motor, and relay outputs away from the MCU and analog section. Use a continuous ground plane where the board design permits it, but avoid allowing switching return currents to cross the quiet analog ground region.
合規資訊
The product listings identify RoHS compliance and a Pb-free R5F21144SP#U0. No specific AEC-Q100 qualification, REACH status, halogen-free declaration, or conflict-minerals declaration is identified.
