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Renesas R5F21194SP#U0
- Part No.:
- R5F21194SP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F21194SP#U0.pdf
- Description:
- IC MCU 16BIT 16KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,987
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Product details
Overview
R5F21194SP#U0 from Renesas Electronics is a 16-bit single-chip microcontroller in the R8C/19 Group, featuring an R8C/Tiny Series CPU core, 16 KB program flash ROM, 2 KB data flash (1 KB × 2 blocks), and 1 KB RAM. It operates at up to 20 MHz (50 ns min. instruction time), supports 20-pin LSSOP packaging (PLSP0020JB-A), and integrates UART, clock-synchronous serial I/O, 16-bit Timer C, dual 8-bit timers, 4-channel comparator, and on-chip oscillators - deployed in household appliance control and sensor-based industrial equipment.
For engineers reviewing the R5F21194SP#U0 datasheet, R5F21194SP#U0 pinout, R5F21194SP#U0 application, or R5F21194SP#U0 equivalent, this page delivers verified specifications, validated package mapping, confirmed peripheral functions, and real-world use context for embedded firmware development and BOM selection.
Technical Context
The R5F21194SP#U0 implements a 16-bit R8C/Tiny CPU with 89 fundamental instructions and 1 Mbyte address space, executing instructions in as little as 50 ns at 20 MHz. Its memory architecture separates 16 KB program ROM (0C000h–0FFFFh) from dedicated 2 KB data flash (02400h–02BFFh), enabling reliable in-field parameter storage without erasing application code.
Peripheral integration includes two independent serial interfaces (one UART + one clock-synchronous serial I/O), Timer C with input capture/output compare, and a 4-channel 1-bit comparator with analog inputs AN8–AN11 - all managed via SFRs mapped to 00000h–002FFh and supported by 7-level priority interrupt handling (10 internal, 4 external, 4 software sources).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C/Tiny 16-bit, 89 instructions, 1 Mbyte address space - enables compact firmware and deterministic real-time response. |
| Memory | 16 KB program flash ROM + 2 KB data flash (1 KB × 2 blocks) + 1 KB RAM - supports firmware updates and nonvolatile parameter storage independently. |
| Max Clock Speed | 20 MHz (50 ns min. instruction time at VCC = 3.0–5.5 V) - delivers high throughput for sensor polling and motor control loops. |
| Supply Voltage | VCC = 3.0–5.5 V (20 MHz), 2.7–5.5 V (10 MHz) - ensures compatibility with standard 3.3 V and 5 V industrial power rails. |
| Low-Power Modes | Wait mode: 35 µA @ 3.0 V; Stop mode: 0.7 µA @ 3.0 V - extends battery life in portable or energy-conscious applications. |
| Package | 20-pin LSSOP (PLSP0020JB-A), 0.65 mm pitch - provides compact footprint and manufacturable leaded assembly for cost-sensitive designs. |
| Operating Temp | −20°C to +85°C - certified for consumer and general industrial ambient conditions per Renesas Standard grade. |
Pinout & Package
Package: 20-pin molded-plastic LSSOP (PLSP0020JB-A), 0.65 mm pitch, body size 7.6 × 4.4 mm - compatible with standard surface-mount reflow profiles and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1_0 / KI0 / AN8 / CMP0_0 | Multi-function I/O port | Configurable as key interrupt input, analog comparator channel 0 input, or general-purpose I/O - enables direct button sensing and analog threshold detection. |
| P1_4 / TXD0 | UART transmit output | Drives asynchronous serial data (TTL level) for host communication or debug logging without external level shifters. |
| P1_5 / RXD0 / CNTR01 / INT11 | UART receive input / timer input / interrupt | Accepts serial data input while simultaneously supporting counter/timer event capture and interrupt triggering - consolidates signal paths. |
| XIN / XOUT | Main clock oscillator interface | Connects to ceramic resonator or crystal (1–20 MHz); XIN accepts external clock source if XOUT left open - ensures flexible timing source selection. |
| RESET | Active-low reset input | Asynchronous hardware reset assertion resets CPU, peripherals, and registers - critical for safe recovery after brownout or fault. |
| MODE | Boot mode select | Must be pulled high via resistor to enable normal flash execution - prevents accidental entry into programming mode during power-up. |
Key Features
| Feature | Design Value |
|---|---|
| Data Flash Architecture | Dedicated 2 KB (1 KB × 2 blocks) with 10,000 erase/write cycles - enables robust field-updatable calibration tables and device configuration without compromising program ROM. |
| Integrated Analog Comparator | 4-channel 1-bit comparator with analog inputs AN8–AN11 and programmable reference (VREF) - eliminates need for external comparators in threshold-detection circuits. |
| Dual Serial Interfaces | One UART + one clock-synchronous serial I/O - allows simultaneous host telemetry and peripheral daisy-chaining (e.g., sensor arrays or LED drivers). |
| Low-Power Operation | 0.7 µA stop-mode current @ 3.0 V - supports battery-powered operation for >1 year in intermittent-sensing applications. |
| On-Chip Oscillators | High-speed (adjustable) and low-speed on-chip oscillators - reduces BOM count and startup time versus external crystals in non-precision timing roles. |
Applications
| Home Appliance Control | Industrial Sensor Interface |
|---|---|
|
Use Scenario: Embedded controller in washing machine main board managing motor drive sequencing, water level sensing, and user interface. IC Role / Device Role / Timing Role: Primary system MCU executing real-time motor control algorithms, reading analog pressure/temperature sensors, and driving LED indicators. Use Value: Integrated 4-channel comparator and UART reduce external component count; 16 KB flash accommodates complex state-machine logic and safety diagnostics. |
Use Scenario: Standalone environmental monitor in HVAC ducts measuring temperature, humidity, and airflow via analog and digital sensors. IC Role / Device Role / Timing Role: Data acquisition node performing analog-to-digital thresholding, local decision-making, and RS-485/UART reporting. Use Value: On-chip data flash stores calibrated sensor offsets; low-power stop mode extends maintenance interval in inaccessible locations. |
| Office Equipment | Security System Peripherals |
|
Use Scenario: Firmware engine in multifunction printer controlling paper feed, toner detection, and USB-to-parallel bridge logic. IC Role / Device Role / Timing Role: Peripheral coordinator interfacing with stepper drivers, photointerrupters, and status LEDs using GPIO and timer outputs. Use Value: 20-pin LSSOP fits tight PCB layouts; 7-level interrupt priority ensures timely response to paper jam or cover-open events. |
Use Scenario: Door/window contact sensor module with tamper detection, battery monitoring, and wireless transmission trigger. IC Role / Device Role / Timing Role: Low-power event detector sampling reed switches and voltage dividers, then waking radio on alarm condition. Use Value: 0.7 µA stop-mode current maximizes coin-cell battery life; integrated comparator enables precise voltage thresholding for battery health checks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21194DD | Same core, memory, and peripherals; packaged in 20-pin SDIP (PRDP0020BA-A) instead of LSSOP. | Preferred for through-hole prototyping or legacy wave-solder assembly; larger footprint and higher thermal resistance than LSSOP. | Select R5F21194DD only when SDIP mechanical compatibility or hand-solderability is required over density or reflow yield. |
| R5F21194NP | Same core, memory, and peripherals; packaged in 28-pin HWQFN (PWQN0028KA-B) with additional GPIO and NC pins. | Supports more complex I/O routing and higher-density PCBs; requires reflow profile optimization for QFN thermal pad. | Choose R5F21194NP when design requires extra I/O flexibility or migration path to higher-pin-count variants in same family. |
Compared with R5F21194SP#U0, R5F21194DD offers through-hole assembly compatibility but sacrifices board space efficiency, while R5F21194NP provides expanded I/O and thermal performance at the cost of increased layout complexity and soldering process requirements.
Availability
R5F21194SP#U0 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor interface, and office equipment requiring stable component supply across long production lifecycles.
Supply support for R5F21194SP#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, and power solutions for automotive, industrial, and IoT applications.
The R8C/19 Group, including R5F21194SP#U0, was designed for cost-sensitive, low-power embedded control in consumer and general industrial equipment - emphasizing integration, flash endurance, and ease of firmware maintenance.
FAQ
What is the maximum operating frequency of the R5F21194SP#U0?
The R5F21194SP#U0 supports a maximum operating frequency of 20 MHz at VCC = 3.0–5.5 V, achieving a minimum instruction execution time of 50 ns. This timing is guaranteed under specified voltage and temperature conditions (−20°C to +85°C) and enables responsive real-time control in applications such as motor sequencing and sensor polling. The R5F21194SP#U0 achieves this using its on-chip high-speed oscillator or external crystal/resonator connected to XIN/XOUT.
Does the R5F21194SP#U0 include on-chip data flash memory?
Yes, the R5F21194SP#U0 includes 2 KB of on-chip data flash memory organized as two 1 KB blocks, rated for 10,000 erase/write cycles. This memory is physically and logically separate from the 16 KB program flash ROM and is intended for storing calibration data, device configuration, or runtime parameters. The R5F21194SP#U0 supports independent programming and erasure of data flash without affecting program code integrity.
What package type is used for the R5F21194SP#U0?
The R5F21194SP#U0 is supplied in a 20-pin molded-plastic LSSOP (PLSP0020JB-A) package with 0.65 mm pin pitch and dimensions of 7.6 × 4.4 mm. This leaded surface-mount package supports standard reflow soldering processes and provides mechanical reliability for consumer and industrial applications. The R5F21194SP#U0 does not use SDIP or HWQFN variants - those correspond to different part numbers (e.g., R5F21194DD and R5F21194NP).
How many serial communication interfaces does the R5F21194SP#U0 support?
The R5F21194SP#U0 supports two independent serial interfaces: one UART channel (TXD0/RXD0) and one clock-synchronous serial I/O channel (CLK0/TXD1/RXD1). Both operate at programmable baud rates and support full-duplex communication. These interfaces allow concurrent host telemetry and peripheral daisy-chaining - for example, UART for PC debugging and synchronous serial for driving LED displays or ADCs. The R5F21194SP#U0 does not include SPI, I²C, or CAN controllers.
What is the operating temperature range for the R5F21194SP#U0?
The R5F21194SP#U0 is rated for an operating ambient temperature range of −20°C to +85°C, classified by Renesas as "Standard" grade. This specification applies to the SP suffix variant and aligns with use cases in consumer electronics, office equipment, and general industrial environments. A D-suffix version (e.g., R5F21194DSP) extends the lower limit to −40°C but is a distinct orderable part - the R5F21194SP#U0 itself is not qualified for extended industrial or automotive temperature ranges.
R5F21194SP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- R8C/1x/19
- 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:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F21194SP#U0 FAQ
1.How can I place an order for R5F21194SP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21194SP#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 R5F21194SP#U0 reliable?
The price and inventory of R5F21194SP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21194SP#U0 is usually 5 days.
3.What payment methods are accepted for R5F21194SP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21194SP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21194SP#U0?
R5F21194SP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21194SP#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 R5F21194SP#U0?
For technical support, including R5F21194SP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21194SP#U0 requirements.
6.How does Aetrix verify that R5F21194SP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F21194SP#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 R5F21194SP#U0 meets industry standards.
7.What is the process for return or replacement of R5F21194SP#U0?
All R5F21194SP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21194SP#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 R5F21194SP#U0 part is unused and in its original packaging.
Return procedure for R5F21194SP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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