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Renesas R5F11W68DSM#10
- Part No.:
- R5F11W68DSM#10
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F11W68DSM#10.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,554
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Product details
Overview
R5F11W68DSM#10 from Renesas Electronics is an 8 KB flash, 1 KB RAM RL78/G1M 20-pin TSSOP microcontroller with ultra-low-power operation (0.61 µA in STOP mode), 20 MHz high-speed on-chip oscillator (±2.0% accuracy), 8-channel 8/10-bit ADC, and integrated UART/CSI serial interfaces - deployed in industrial sensor nodes requiring reliable low-voltage operation from 2.25 V to 5.5 V.
For engineers reviewing the R5F11W68DSM#10 datasheet, R5F11W68DSM#10 pinout, R5F11W68DSM#10 application, or R5F11W68DSM#10 equivalent, this page delivers verified technical context, real-world design meaning for each specification, validated pin functions for PCB layout, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The R5F11W68DSM#10 implements the RL78-S1 CPU core with a 3-stage pipeline, supporting instruction execution times from 0.05 µs (20 MHz) to 0.8 µs (1 MHz), and features a selectable power-on-reset (SPOR) circuit with four rising-edge detection thresholds (2.25 V to 4.45 V). It integrates a 12-bit interval timer and watchdog timer driven by a dedicated 15 kHz low-speed on-chip oscillator (±15% accuracy).
Its I/O subsystem includes 18 total pins: 14 N-ch open-drain outputs (VDD-tolerant), 6 P-ch open-drain outputs, and supports key interrupt, on-chip pull-up resistors (10–100 kΩ), and peripheral I/O redirection via PIOR register - enabling flexible signal routing without hardware changes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Flash Memory | 8 KB code flash with on-chip debug support - sufficient for compact firmware with bootloader, sensor fusion, and communication stacks. |
| RAM | 1 KB on-chip RAM - supports real-time data buffering, stack depth for nested interrupts, and small variable sets in resource-constrained applications. |
| Operating Voltage | 2.25 V to 5.5 V - enables direct interface with 3.3 V and 5 V peripherals and compatibility with brown-out conditions down to 2.25 V. |
| STOP Mode Current | 0.61 µA at VDD = 3.0 V, TA = 25°C - allows multi-year battery life in intermittently active industrial monitoring devices. |
| ADC Resolution & Channels | 8/10-bit resolution across 8 analog inputs - supports simultaneous temperature, voltage, and current sensing with configurable sampling rates. |
| Serial Interfaces | 1 UART channel + 1 CSI channel - provides robust asynchronous communication (e.g., Modbus RTU) and synchronous SPI-compatible peripheral control. |
| Timer Resources | Four 16-bit TAU channels + one 12-bit interval timer + watchdog - enables precise PWM generation, time-stamped event capture, and fail-safe timeout supervision. |
Pinout & Package
Package: 20-pin plastic TSSOP (4.4 × 6.5 mm, 0.65 mm pitch), industrial-grade (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 2.25–5.5 V supply rail; decoupling capacitor required near pin for stable core and analog operation. |
| VSS | Ground reference | System ground return; must be low-impedance connection to minimize noise coupling into ADC and timers. |
| P00–P05 | General-purpose I/O (CMOS) | Configurable as digital input/output or analog input (ANI0–ANI5); support on-chip pull-up (10–100 kΩ) and key interrupt. |
| P06, P07, P10–P16, P40 | N-ch open-drain I/O (VDD-tolerant) | Drive external loads up to 40 mA per pin; tolerate voltages above VDD - ideal for level-shifting and wired-AND bus interfaces. |
| P125 | RESET / KR1 | Active-low reset input with internal pull-up; also serves as key return line - enables hardware reset and keypad scanning on same pin. |
| P137 | INTP0 / TI00 | External interrupt source or timer input - used for edge-triggered wake-up from HALT/STOP modes or pulse-width measurement. |
| ANI0–ANI7 | Analog input channels | Dedicated pins for 8-channel ADC; require external filtering and guard traces to maintain 8/10-bit effective resolution. |
| RxD0 / TxD0 | UART serial I/O | Asynchronous full-duplex interface; supports baud rates up to 3.3 Mbps (at 20 MHz fMCK) - suitable for host MCU or PC communication. |
| SI00 / SO00 / SCK00 | CSI master/slave interface | SPI-compatible synchronous serial; SCK00 output in master mode, input in slave mode - enables daisy-chain sensor networks or EEPROM interfacing. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power STOP mode | 0.61 µA typical current draw enables >10-year coin-cell battery life in maintenance-free sensor transmitters. |
| Selectible SPOR voltage thresholds | Four programmable reset detection levels (2.25 V/2.68 V/3.02 V/4.45 V) allow precise brown-out response matching system power rail behavior. |
| Real-time output (RTIO) function | 8 dedicated RTIO channels provide deterministic, jitter-free timing signals for LED dimming, motor commutation, or synchronized actuation. |
| Peripheral I/O redirection (PIOR) | Hardware-mapped alternate functions (e.g., UART, CSI, timer I/O) can be reassigned via register - eliminates PCB redesign for interface reconfiguration. |
| On-chip BCD correction | Hardware-accelerated binary-to-BCD conversion reduces firmware overhead in display-driven applications like industrial HMI panels. |
Applications
| Industrial Sensor Node | Smart Meter Interface |
|---|---|
|
Use Scenario: Battery-powered temperature/humidity/pressure sensor collecting data every 5 minutes and transmitting via UART to gateway. IC Role / Device Role / Timing Role: Main controller executing sensor readout, ADC conversion, data formatting, and UART transmission; uses STOP mode between samples. Use Value: 0.61 µA STOP current extends 2000 mAh coin-cell life to >12 years; 8-channel ADC supports multi-sensor integration without external MUX. |
Use Scenario: Pulse-counting interface between mechanical utility meter and wireless communication module. IC Role / Device Role / Timing Role: Edge-triggered counter capturing meter pulses via INTP0; formats data and forwards via UART to RF transceiver. Use Value: Hardware timer input (TI00) ensures sub-millisecond pulse capture accuracy; on-chip UART eliminates external level shifter. |
| Programmable Logic Controller (PLC) I/O Module | Industrial Keypad Controller |
|
Use Scenario: DIN-rail mounted I/O expansion module reading 8 discrete inputs and driving 6 open-drain outputs. IC Role / Device Role / Timing Role: Real-time I/O handler with N-ch open-drain outputs (P00–P05) driving 24 V industrial loads; key interrupt scans matrix. Use Value: VDD-tolerant N-ch outputs directly switch 24 V loads; 8-key interrupt supports 4×2 keypad without external scan logic. |
Use Scenario: Front-panel keypad for HVAC controller with backlight dimming and tactile feedback. IC Role / Device Role / Timing Role: Key scanner using KR0–KR7 lines; generates buzzer tone via PCLBUZ0 and controls LED brightness via RTIO PWM. Use Value: Integrated buzzer/clock output and 8 RTIO channels eliminate external PWM generator; reduces BOM count by 3 components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F11W67DSM#10 | 4 KB flash, 512 B RAM - half memory capacity; identical package, pinout, and peripheral set. | Suitable for simpler firmware (e.g., single-sensor polling without data logging), but insufficient for OTA update partitions or complex protocol stacks. | Select when firmware size remains under 3.2 KB and no future feature expansion is planned. |
| R5F11Y68DSM#10 | RL78/G1N variant: adds high-current P-ch open-drain outputs (130 mA sink on P00–P05), removes RTIO and real-time output capability. | Optimized for segment LCD drive and higher-current load switching; not suitable for applications requiring deterministic RTIO timing or LED/motor PWM synchronization. | Choose only for LCD-based HMIs or where >40 mA per-pin sink capability is mandatory and RTIO is unused. |
Compared with R5F11W67DSM#10, the R5F11W68DSM#10 provides double flash/RAM for field-upgradable firmware and richer data handling; versus R5F11Y68DSM#10, it retains real-time output for synchronized actuation but trades off high-current drive capability - making it optimal for sensor-centric, timing-critical industrial edge nodes.
Availability
R5F11W68DSM#10 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter interfaces, PLC I/O modules, and keypad controllers requiring stable component supply across extended product lifecycles.
Supply support for R5F11W68DSM#10 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 RL78/G1M product line is engineered for ultra-low-power industrial control applications, integrating precision analog, deterministic timing, and robust I/O in compact packages - with R5F11W68DSM#10 targeting cost-sensitive, battery-operated edge nodes.
FAQ
What is the maximum operating frequency of the R5F11W68DSM#10?
The R5F11W68DSM#10 supports a maximum high-speed on-chip oscillator frequency of 20 MHz, delivering a minimum instruction execution time of 0.05 µs at VDD ≥ 2.7 V. This frequency is selectable via option byte bits 0–2 and maintains ±2.0% accuracy across –20°C to +85°C ambient temperature.
Does the R5F11W68DSM#10 support hardware debugging during development?
Yes, the R5F11W68DSM#10 includes an on-chip debug function compatible with Renesas E2 emulator and CS+ IDE. However, Renesas explicitly cautions against using this feature in mass-produced units due to flash memory rewrite endurance limits - production firmware should be verified and locked before deployment.
What are the key differences between R5F11W68DSM#10 and R5F11Y68DSM#10?
The R5F11W68DSM#10 belongs to the RL78/G1M group and includes 8 real-time output (RTIO) channels and standard I/O drive strength, while R5F11Y68DSM#10 is RL78/G1N with high-current P-ch open-drain outputs (130 mA sink) but no RTIO functionality - making them non-interchangeable for timing-critical or high-drive applications.
Can the R5F11W68DSM#10 operate reliably at 2.0 V supply voltage?
No - although the absolute maximum rating permits VDD down to 2.0 V, Renesas specifies a minimum operational voltage of 2.25 V due to the selectable power-on-reset (SPOR) circuit's lowest detection threshold. Operation below 2.25 V risks unreliable reset behavior and is outside guaranteed specifications.
How many analog input channels does the R5F11W68DSM#10 support, and what is their resolution?
The R5F11W68DSM#10 integrates an 8/10-bit successive-approximation ADC with 8 dedicated analog input channels (ANI0–ANI7), operating over VDD = 2.4 V to 5.5 V. Resolution is software-selectable per conversion, enabling trade-offs between speed (8-bit) and precision (10-bit) within the same firmware build.
R5F11W68DSM#10 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Series:
- RL78/G1M
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- RL78
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- CSI, UART/USART
- Peripherals:
- POR, WDT
- Number of I/O:
- 16
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 5.5V
- Data Converters:
- A/D 8x8/10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F11W68DSM#10 FAQ
1.How can I place an order for R5F11W68DSM#10 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F11W68DSM#10 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 R5F11W68DSM#10 reliable?
The price and inventory of R5F11W68DSM#10 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F11W68DSM#10 is usually 5 days.
3.What payment methods are accepted for R5F11W68DSM#10?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F11W68DSM#10 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F11W68DSM#10?
R5F11W68DSM#10 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F11W68DSM#10 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 R5F11W68DSM#10?
For technical support, including R5F11W68DSM#10 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F11W68DSM#10 requirements.
6.How does Aetrix verify that R5F11W68DSM#10 is sourced from the original manufacturer or authorized distributors?
All R5F11W68DSM#10 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 R5F11W68DSM#10 meets industry standards.
7.What is the process for return or replacement of R5F11W68DSM#10?
All R5F11W68DSM#10 units undergo pre-shipment inspection (PSI). If there is an issue with R5F11W68DSM#10, 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 R5F11W68DSM#10 part is unused and in its original packaging.
Return procedure for R5F11W68DSM#10:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R5F11W68DSM#10 Tags
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