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Renesas R5F21173DSP#U0
- Part No.:
- R5F21173DSP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F21173DSP#U0.pdf
- Description:
- IC MCU 16BIT 12KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:159
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Product details
Overview
R5F21173DSP#U0 from Renesas Electronics is a 16-bit R8C/Tiny Series microcontroller in 20-pin LSSOP package, featuring 12 KB program flash ROM, 1 KB × 2 data flash (10,000 erase/write cycles), 768 bytes RAM, and integrated 10-bit 4-channel ADC - deployed in sensor-based housing equipment and industrial control systems requiring low-power operation down to 0.7 µA in stop mode.
For engineers reviewing the R5F21173DSP#U0 datasheet, R5F21173DSP#U0 pinout, R5F21173DSP#U0 application, or R5F21173DSP#U0 equivalent, this page delivers verified technical context, validated pin functions, real-world use cases, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The R5F21173DSP#U0 implements the R8C/Tiny CPU core with 89 instructions and executes at 50 ns minimum instruction time (20 MHz XIN, 3.0–5.5 V). It integrates dual clock generation circuits: main crystal/ceramic oscillator (XIN/XOUT) and adjustable high-speed/low-speed on-chip oscillators - enabling flexible timing without external crystals.
Peripheral integration includes Timer X/Z (8-bit × 2), Timer C (16-bit with input capture/output compare), UART + clock-synchronous serial I/O, I²C bus interface (SCL/SDA), and voltage-detection/power-on-reset circuitry - all managed via dedicated SFRs mapped to 0000h–002Fh address space.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C/Tiny 16-bit, 89-instruction set, 50 ns min. instruction time @ 20 MHz |
| Memory | 12 KB program flash ROM + 2 KB data flash (1 KB × 2 blocks, 10k erase cycles) |
| RAM | 768 bytes internal SRAM for variables, stack, and subroutine calls |
| Analog Interface | 10-bit A/D converter with 4 input channels (AN8–AN11), reference via VREF/VCC |
| Power Modes | Stop mode: 0.7 µA @ 3.0 V; Wait mode: 35 µA @ 3.0 V, peripheral clocks off |
| Operating Range | -40°C to +85°C ambient, 2.7–5.5 V supply - qualified for industrial equipment |
| Package | 20-pin plastic LSSOP (PLSP0020JB-A), 0.65 mm pitch, surface-mount compatible |
Pinout & Package
Package: 20-pin plastic LSSOP (PLSP0020JB-A), 7.6 mm × 4.4 mm body, 0.65 mm lead pitch, exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (P3_5) | I²C Clock (SCL) | Open-drain bidirectional clock line for I²C bus communication |
| 2 (P3_7) | Timer X Input (CNTR0) | External event counter input for Timer X channel |
| 3 (RESET) | Active-Low Reset | Asynchronous reset trigger; must be held low ≥ 100 ns for valid reset assertion |
| 4 (XOUT) | Main Clock Output | Output from internal oscillator circuit; connects to crystal/resonator second terminal |
| 5 (VSS/AVSS) | Digital & Analog Ground | Common return path; AVSS requires local decoupling capacitor to AVCC |
| 6 (XIN) | Main Clock Input | Primary clock source input; accepts crystal (1–20 MHz), ceramic resonator, or external clock |
| 7 (VCC) | Supply Voltage | 2.7–5.5 V digital/analog power; bypassed with 0.1 µF ceramic capacitor near pin |
| 8 (MODE) | Boot Mode Select | Must be pulled high via resistor to enable normal flash execution mode |
| 9 (P4_5) | External Interrupt 0 (INT0) | Edge-triggered interrupt input supporting wake-up from low-power modes |
| 10 (P1_7) | Timer X Output / INT10 | Timer X overflow output or external interrupt input - configurable per SFR |
| 11 (P1_6) | Serial Clock (CLK0) | Transfer clock for synchronous serial I/O or UART baud rate generation |
| 12 (P1_5) | UART RX / INT11 | Asynchronous serial receive input or external interrupt source |
| 13 (P1_4) | UART TX | Asynchronous serial transmit output; driven by UART module |
| 14 (P1_3) | LED Drive / TZOUT / AN11 | Configurable as LED sink driver, Timer Z output, or ADC input channel 3 |
| 15 (P1_2) | LED Drive / CMP0_2 / AN10 | Configurable as LED sink driver, comparator output, or ADC input channel 2 |
| 16 (AVCC/VREF) | Analog Supply / Reference | Separate analog power rail; VREF internally tied to AVCC for ADC reference |
| 17 (P1_1) | LED Drive / CMP0_1 / AN9 | Configurable as LED sink driver, comparator output, or ADC input channel 1 |
| 18 (P1_0) | LED Drive / CMP0_0 / AN8 | Configurable as LED sink driver, comparator output, or ADC input channel 0 |
| 19 (P3_3) | Timer C Input / INT3 / CMP1_0 | Timer C capture input, external interrupt, or comparator 1 input - multiplexed function |
| 20 (P3_4) | I²C Data (SDA) | Open-drain bidirectional data line for I²C bus communication |
Key Features
| Feature | Design Value |
|---|---|
| Data Flash Endurance | 10,000 program/erase cycles - enables reliable firmware parameter storage without external EEPROM |
| Low-Power Stop Mode | 0.7 µA typical current draw - supports battery-powered sensors with multi-year standby life |
| Integrated Oscillators | High-speed on-chip oscillator with frequency adjustment - eliminates need for external crystal in cost-sensitive designs |
| Hardware Watchdog | 15-bit watchdog timer with prescaler and count-source protection - prevents runaway code in unattended systems |
| LED Drive Capability | 4 dedicated I/O pins (P1_0–P1_3) support direct LED sinking up to 20 mA - reduces BOM count in HMI applications |
| Voltage Monitoring | Dual voltage detection circuits (VCA1/VCA2) with programmable thresholds - ensures safe operation during brown-out conditions |
Applications
| Smart Thermostat Control | Industrial Sensor Node |
|---|---|
|
Use Scenario: Compact wall-mounted HVAC controller monitoring temperature/humidity and driving relay outputs and LED indicators. IC Role / Device Role / Timing Role: Main system controller executing PID algorithms, managing I²C sensor reads, and generating PWM for fan speed control. Use Value: Integrated 10-bit ADC and LED drive ports eliminate external signal conditioning and driver ICs, reducing PCB area and component count. |
Use Scenario: Battery-powered vibration/temperature node in factory predictive maintenance system transmitting data over UART to gateway. IC Role / Device Role / Timing Role: Low-power data acquisition unit sampling analog sensors, storing calibration data in data flash, and waking periodically to transmit. Use Value: 0.7 µA stop-mode current and 10,000-cycle data flash enable >5-year battery life while retaining field-updatable calibration parameters. |
| Home Security Keypad | Office Equipment Motor Control |
|
Use Scenario: Entry keypad with tactile buttons, LED status indicators, and tamper detection using key-input interrupts. IC Role / Device Role / Timing Role: Dedicated key-scan controller with KI0–KI3 inputs, LED drive outputs, and INT0/INT3 for instant wake-up on button press. Use Value: Hardware key-input interrupt capability (4 pins) and built-in LED drivers reduce firmware overhead and external components for user interface. |
Use Scenario: Paper feed motor controller in multifunction printer regulating DC motor speed via PWM and monitoring encoder feedback. IC Role / Device Role / Timing Role: Real-time motion controller using Timer C input capture for encoder pulses and Timer X/Z for PWM generation. Use Value: Dual 8-bit timers and 16-bit Timer C with input capture provide precise motor phase timing and position tracking without external logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21173SP | No extended temperature grade; rated -20°C to +85°C only (vs. -40°C to +85°C for R5F21173DSP#U0) | Suitable for commercial indoor equipment but not industrial environments with wide thermal swings | Select R5F21173SP only if operating ambient stays above -20°C and cost is prioritized over thermal robustness |
| R5F21174DSP | 16 KB program ROM + 1 KB RAM (vs. 12 KB ROM + 768 B RAM); identical data flash, peripherals, and package | Better suited for applications requiring larger firmware image or more runtime variables | Choose R5F21174DSP when firmware size exceeds 12 KB or additional RAM is needed for buffering or complex state machines |
Compared with R5F21173SP and R5F21174DSP, the R5F21173DSP#U0 uniquely balances extended temperature operation (-40°C to +85°C), sufficient memory for mid-complexity firmware, and ultra-low stop-mode power - making it optimal for battery-powered industrial sensors and outdoor-rated controls where thermal resilience and energy efficiency are co-critical.
Availability
R5F21173DSP#U0 is available at Aetrix Electronics and suitable for smart thermostat control, industrial sensor nodes, home security keypads, and office equipment motor control requiring stable component supply across long-lifecycle production programs.
Supply support for R5F21173DSP#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 SoC solutions for automotive, industrial, and IoT markets.
The R8C/17 Group, including R5F21173DSP#U0, was designed for cost-sensitive, low-power embedded control in appliances, housing systems, and general industrial equipment - emphasizing integrated peripherals and flash endurance over raw performance.
FAQ
What is the maximum operating frequency of the R5F21173DSP#U0?
The R5F21173DSP#U0 supports a maximum main clock frequency of 20 MHz with supply voltage between 3.0 V and 5.5 V. At this frequency, its minimum instruction execution time is 50 ns. Operation at 20 MHz requires an external crystal or resonator connected to XIN/XOUT, or use of the calibrated high-speed on-chip oscillator with frequency adjustment enabled via HRA0–HRA2 registers.
Does the R5F21173DSP#U0 support in-system programming (ISP)?
Yes, the R5F21173DSP#U0 supports in-system programming via its on-chip debug interface using the Renesas E8/E8a emulator or compatible tools. Program ROM and data flash can be reprogrammed without removing the device from the target board, enabling field firmware updates and manufacturing calibration writes.
What is the purpose of the MODE pin on the R5F21173DSP#U0?
The MODE pin on the R5F21173DSP#U0 selects boot mode: it must be pulled high (typically via 10 kΩ resistor to VCC) to enter normal flash execution mode after reset. If left floating or pulled low, the device enters special download mode - used only for initial programming or recovery via dedicated tooling.
How many I²C bus interfaces does the R5F21173DSP#U0 include?
The R5F21173DSP#U0 includes one hardware I²C bus interface, implemented on pins P3_4 (SDA) and P3_5 (SCL). Both pins are open-drain and require external pull-up resistors (typically 2.2–10 kΩ) to VCC. The interface supports standard-mode (100 kbps) and fast-mode (400 kbps) operation per I²C specification.
Is the R5F21173DSP#U0 RoHS compliant?
Yes, the R5F21173DSP#U0 is RoHS compliant and meets EU Directive 2011/65/EU requirements. Renesas confirms compliance in product change notifications and material declarations; the LSSOP package uses lead-free matte tin plating and halogen-free molding compound.
R5F21173DSP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- R8C/1x/17
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, SIO, UART/USART
- Peripherals:
- LED, POR, Voltage Detect, WDT
- Number of I/O:
- 13
- Program Memory Size:
- 12KB (12K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 768 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F21173DSP#U0 FAQ
1.How can I place an order for R5F21173DSP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21173DSP#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 R5F21173DSP#U0 reliable?
The price and inventory of R5F21173DSP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21173DSP#U0 is usually 5 days.
3.What payment methods are accepted for R5F21173DSP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21173DSP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21173DSP#U0?
R5F21173DSP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21173DSP#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 R5F21173DSP#U0?
For technical support, including R5F21173DSP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21173DSP#U0 requirements.
6.How does Aetrix verify that R5F21173DSP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F21173DSP#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 R5F21173DSP#U0 meets industry standards.
7.What is the process for return or replacement of R5F21173DSP#U0?
All R5F21173DSP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21173DSP#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 R5F21173DSP#U0 part is unused and in its original packaging.
Return procedure for R5F21173DSP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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