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Renesas R5F21182DSP#U0
- Part No.:
- R5F21182DSP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F21182DSP#U0.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,739
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Product details
Overview
R5F21182DSP#U0 from Renesas Electronics is a 16-bit single-chip microcontroller in the R8C/18 Group, featuring an R8C/Tiny Series CPU core, 8 KB flash program memory, 512 bytes RAM, and operation at up to 20 MHz (50 ns min instruction time). It integrates timer peripherals (8-bit ×2, 16-bit ×1), UART + clock-synchronous serial I/O, 4-channel 1-bit comparator, watchdog timer, and 13 I/O pins-including LED drive capability-targeting cost-sensitive embedded control in household appliances and industrial sensors.
For engineers reviewing the R5F21182DSP#U0 datasheet, R5F21182DSP#U0 pinout, R5F21182DSP#U0 application, or R5F21182DSP#U0 equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options for design-in and supply continuity planning.
Technical Context
The R5F21182DSP#U0 implements a 16-bit R8C/Tiny CPU with 89 fundamental instructions and a 1 Mbyte address space. Its memory subsystem includes on-chip flash ROM (8 KB) and SRAM (512 bytes), with no data flash-distinguishing it from R8C/19 Group variants. The device supports two clock sources: external crystal/resonator via XIN/XOUT and internal high-speed/low-speed oscillators, the former featuring frequency adjustment.
Peripheral integration includes Timer X/Z (8-bit, prescaler-equipped), Timer C (16-bit with input capture/output compare), dual UART channels (one shared with clock-synchronous serial I/O), and a 4-channel 1-bit comparator with analog inputs AN8–AN11. It operates across –40°C to +85°C (D-grade) with supply voltage 2.7–5.5 V and ultra-low stop-mode current (0.7 µA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C/Tiny 16-bit, 89 instructions, 50 ns min execution @ 20 MHz |
| Memory | 8 KB flash program ROM, 512 bytes RAM - no data flash (R8C/18 Group) |
| Operating Temp | –40°C to +85°C (D-grade), suitable for industrial sensor and appliance environments |
| Supply Voltage | 2.7–5.5 V - enables direct interface with 3.3 V or 5 V logic and battery-backed systems |
| Low-Power Modes | Wait mode: 35 µA @ 3.0 V; Stop mode: 0.7 µA - extends battery life in portable devices |
| Peripherals | UART ×2, clock-sync serial I/O ×1, 8-bit timers ×2, 16-bit timer ×1, 4-channel 1-bit comparator |
| I/O Pins | 13 programmable CMOS I/O (including 4 LED drive ports), 3 dedicated input-only pins |
Pinout & Package
Package: 20-pin molded-plastic LSSOP (PLSP0020JB-A), 0.65 mm pitch, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1_0 / KI0 / AN8 / CMP0_0 | Multi-function I/O port | LED drive-capable GPIO, key interrupt input, analog comparator channel 0 input |
| P1_1 / KI1 / AN9 / CMP0_1 | Multi-function I/O port | LED drive-capable GPIO, key interrupt input, analog comparator channel 1 input |
| P1_2 / KI2 / AN10 / CMP0_2 | Multi-function I/O port | LED drive-capable GPIO, key interrupt input, analog comparator channel 2 input |
| P1_3 / KI3 / AN11 / TZOUT | Multi-function I/O port | LED drive-capable GPIO, key interrupt input, analog comparator channel 3 input, Timer Z output |
| P1_4 / TXD0 | Serial output | Primary UART transmit pin for host communication or peripheral control |
| P1_5 / RXD0 / CNTR01 / INT11 | Serial input / timer input / interrupt | Primary UART receive pin; also serves as Timer X counter input and external interrupt source |
| P1_6 / CLK0 | Serial clock I/O | Transfer clock for synchronous serial interface (e.g., SPI-like protocols) |
| P1_7 / CNTR00 / INT10 | Timer input / interrupt | Timer X counter input and dedicated external interrupt pin |
| P3_3 / TCIN / INT3 / CMP1_0 | Timer/Interrupt/Comparator | Timer C input capture, external interrupt, and comparator group 1 channel 0 input |
| P3_4 / CMP1_1 | Comparator input | Comparator group 1 channel 1 analog input (no digital I/O function) |
| P3_5 / CMP1_2 | Comparator input | Comparator group 1 channel 2 analog input (no digital I/O function) |
| P3_7 / CNTR0 / TXD1 | Timer output / serial output | Timer X output and secondary UART transmit pin for dual-serial applications |
| P4_2 / VREF | Analog reference input | External reference voltage input for comparator precision scaling |
| P4_5 / INT0 / RXD1 | Interrupt / serial input | Primary external interrupt and secondary UART receive pin |
| RESET | Active-low reset input | Hardware reset initiation - must be held low ≥100 ns for reliable reset assertion |
| XIN / P4_6 | Crystal/resonator input | Main system clock input; accepts ceramic resonator (1–20 MHz) or crystal oscillator |
| XOUT / P4_7 | Crystal/resonator output | Main clock oscillator output; P4_7 is input-only when not used for XOUT |
| MODE | Boot mode select | Must be pulled high via resistor to enable normal flash execution mode |
| VCC / AVCC | Power supply | Core and analog supply (2.7–5.5 V); decoupling capacitor required between VCC and VSS |
| VSS / AVSS | Ground | Digital and analog ground reference; separate AVSS improves comparator noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LED drive ports | Four I/O pins (P1_0–P1_3) support direct LED sinking without external drivers - reduces BOM count in display/control panels |
| Ultra-low-power stop mode | 0.7 µA @ 3.0 V enables multi-year battery operation in wireless sensors and remote controls |
| Dual UART + sync serial I/O | Two independent serial interfaces allow simultaneous host communication and peripheral bridging (e.g., UART-to-SPI bridge) |
| On-chip voltage detection & POR | Embedded power-on reset and voltage monitor eliminate need for external supervisor ICs in cost-sensitive designs |
| High-speed on-chip oscillator | Adjustable internal oscillator (1–20 MHz) enables rapid startup and eliminates crystal for non-timing-critical applications |
Applications
| Home Appliance Control | Industrial Sensor Node |
|---|---|
|
Use Scenario: Microcontroller in washing machine main control board managing motor sequencing, water level sensing, and user interface. IC Role / Device Role / Timing Role: Primary system controller executing real-time motor timing, ADC-based sensor sampling, and LED status indication. Use Value: Integrated LED drive ports reduce discrete driver count; 8 KB flash accommodates firmware with fault diagnostics and UI logic. |
Use Scenario: Standalone temperature/humidity sensor node transmitting data over RS-485 to building management system. IC Role / Device Role / Timing Role: Data acquisition and protocol translation engine using UART for RS-485 transceiver interface and comparator for threshold alarms. Use Value: Dual UART allows concurrent local debug port and field bus interface; 0.7 µA stop mode extends battery life beyond 5 years. |
| Office Equipment Panel | Security System Keypad |
|
Use Scenario: Control unit for multifunction printer front panel with button matrix, LCD backlight, and status LEDs. IC Role / Device Role / Timing Role: Human interface processor handling key scan, LED multiplexing, and serial command relay to main SoC. Use Value: Four LED drive ports directly sink common-anode indicators; key interrupt inputs (KI0–KI3) enable low-latency button response. |
Use Scenario: Entry keypad for access control system with tamper detection, buzzer feedback, and encrypted RF transmission. IC Role / Device Role / Timing Role: Secure peripheral controller managing keypad scan, buzzer PWM generation, and secure boot verification before RF activation. Use Value: On-chip comparator monitors tamper switch voltage; 16-bit Timer C provides precise buzzer tone generation and timing for encryption handshake. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21182DD | Same core, memory, and peripherals; packaged in 20-pin SDIP (PRDP0020BA-A) instead of LSSOP | Through-hole assembly preferred for prototyping or legacy PCBs; identical thermal and electrical specs | Select R5F21182DD for hand-soldered evaluation or repair scenarios requiring through-hole mounting |
| R5F21192DSP#U0 | Adds 2 KB data flash (1 KB × 2 blocks); otherwise identical pinout, package, and peripheral set | Requires non-volatile parameter storage (e.g., calibration data, user settings) without external EEPROM | Choose R5F21192DSP#U0 only if runtime data logging or field-updatable configuration is required |
Compared with R5F21182DSP#U0, R5F21182DD offers identical functionality in a through-hole package for manual assembly, while R5F21192DSP#U0 adds data flash for configuration retention-neither is pin-compatible replacement without firmware or layout review due to functional divergence in memory architecture.
Availability
R5F21182DSP#U0 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, and office equipment panels requiring stable component supply across extended production lifecycles.
Supply support for R5F21182DSP#U0 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and connectivity solutions for automotive, industrial, and IoT markets.
The R8C/18 Group, including R5F21182DSP#U0, was designed for cost-optimized, low-power embedded control in consumer and industrial equipment-emphasizing integration, ease of use, and long-term supply stability.
FAQ
What is the maximum operating frequency and corresponding supply voltage range for R5F21182DSP#U0?
R5F21182DSP#U0 operates at up to 20 MHz with supply voltage 3.0–5.5 V, or up to 10 MHz with supply voltage 2.7–5.5 V. Minimum instruction execution time is 50 ns at 20 MHz and 100 ns at 10 MHz. These ratings are guaranteed across the full –40°C to +85°C ambient temperature range.
Does R5F21182DSP#U0 include data flash memory?
No, R5F21182DSP#U0 belongs to the R8C/18 Group and contains only 8 KB of program flash memory and 512 bytes of RAM. It does not include data flash-unlike R8C/19 Group parts such as R5F21192DSP#U0, which integrate 2 KB of data flash (1 KB × 2 blocks).
Which package type is used by R5F21182DSP#U0, and what are its key mechanical features?
R5F21182DSP#U0 uses the PLSP0020JB-A package: a 20-pin molded-plastic LSSOP with 0.65 mm lead pitch, gull-wing leads, and RoHS compliance. Its compact footprint (7.6 × 4.4 mm) and surface-mount design support high-density PCB layouts in space-constrained applications.
How many serial communication interfaces does R5F21182DSP#U0 support, and what are their configurations?
R5F21182DSP#U0 supports two serial interfaces: one UART channel (TXD0/RXD0) and a second combined UART/clock-synchronous serial I/O channel (TXD1/RXD1/CLK0). The latter can operate in UART mode or synchronous master/slave mode, enabling flexible peripheral bridging without additional ICs.
What are the low-power modes supported by R5F21182DSP#U0, and what are their typical current draws?
R5F21182DSP#U0 supports Wait mode (35 µA @ 3.0 V, peripheral clocks off) and Stop mode (0.7 µA @ 3.0 V, all clocks halted). Both modes retain RAM contents and wake via external interrupt or reset. These values are measured under specified conditions and enable multi-year battery operation in sensor endpoints.
R5F21182DSP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- R8C/1x/18
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- SIO, UART/USART
- Peripherals:
- LED, POR, Voltage Detect, WDT
- Number of I/O:
- 13
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F21182DSP#U0 FAQ
1.How can I place an order for R5F21182DSP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21182DSP#U0 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for R5F21182DSP#U0 reliable?
The price and inventory of R5F21182DSP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21182DSP#U0 is usually 5 days.
3.What payment methods are accepted for R5F21182DSP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21182DSP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21182DSP#U0?
R5F21182DSP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21182DSP#U0 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for R5F21182DSP#U0?
For technical support, including R5F21182DSP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21182DSP#U0 requirements.
6.How does Aetrix verify that R5F21182DSP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F21182DSP#U0 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that R5F21182DSP#U0 meets industry standards.
7.What is the process for return or replacement of R5F21182DSP#U0?
All R5F21182DSP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21182DSP#U0, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The R5F21182DSP#U0 part is unused and in its original packaging.
Return procedure for R5F21182DSP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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