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Renesas R5F11W68ASM#50
- Part No.:
- R5F11W68ASM#50
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F11W68ASM#50.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
R5F11W68ASM#50 from Renesas Electronics is an ultra-low-power 16-bit RL78/G1M microcontroller in a 20-pin TSSOP package, featuring 8 KB flash memory, 1 KB RAM, 8-channel 8/10-bit A/D converter, and integrated UART/CSI serial interfaces - deployed in battery-powered consumer sensor nodes requiring deterministic real-time response and sub-1 µA STOP-mode operation.
For engineers reviewing the R5F11W68ASM#50 datasheet, R5F11W68ASM#50 pinout, R5F11W68ASM#50 application, or R5F11W68ASM#50 equivalent, key selection criteria include its 20 MHz high-speed on-chip oscillator (±2.0% accuracy), 18 I/O pins with N-ch open-drain support, real-time output capability (8 channels), and SPOR reset voltage options (2.25 V / 2.68 V / 3.02 V / 4.45 V).
Technical Context
The R5F11W68ASM#50 implements the RL78-S1 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.05 µs (20 MHz) to 1.0 µs (1 MHz). It integrates a selectable power-on-reset (SPOR) circuit, 12-bit interval timer, watchdog timer, and BCD correction logic - all operating across –40°C to +85°C ambient range.
Its peripheral set includes four 16-bit timer channels (TAU), one UART channel (RxD0/TxD0), one CSI channel (SI00/SO00/SCK00), programmable clock/buzzer output (PCLBUZ0), and key interrupt support (KR0–KR7) - all mapped to dedicated pins in the 20-pin TSSOP footprint with configurable I/O redirection via PIOR register.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78-S1 16-bit CISC with 3-stage pipeline; enables deterministic timing for real-time control loops. |
| Flash / RAM | 8 KB code flash + 1 KB on-chip RAM; sufficient for firmware with sensor fusion and communication stacks. |
| Operating Voltage | 2.25 V to 5.5 V; compatible with single-cell Li-ion, 3.3 V, and 5 V supply rails without external regulators. |
| Low-Power Modes | HALT mode (390–980 µA @ 20 MHz), STOP mode (0.61–2.35 µA); extends battery life in intermittent-sensing applications. |
| A/D Converter | 8/10-bit resolution, 8 analog inputs (ANI0–ANI7); supports direct connection of thermistors, potentiometers, and voltage dividers. |
| Serial Interfaces | 1 UART (RxD0/TxD0) + 1 CSI (SI00/SO00/SCK00); enables host MCU communication and SPI-compatible peripheral interfacing. |
| Oscillator Accuracy | High-speed on-chip oscillator ±2.0% (–20°C to +85°C); eliminates need for external crystal in cost-sensitive designs. |
Pinout & Package
Package: 20-pin plastic TSSOP (4.4 × 6.5 mm, 0.65 mm pitch), RoHS-compliant, embossed tape packaging (#50).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Primary 2.25–5.5 V supply rail; decoupling capacitor required at pin for stable operation. |
| VSS | Ground | Digital ground reference; must be connected to system GND plane with low-inductance path. |
| P00–P05 | General-purpose I/O | CMOS I/O with N-ch open-drain option and on-chip pull-up; supports key scan and LED drive. |
| P10–P16, P40 | Mixed-function I/O | Supports timer I/O (TI00–TI03, TO00–TO03), UART (RxD0/TxD0), CSI (SI00/SO00/SCK00), and analog input (ANI0–ANI7). |
| P125 | Reset input | Active-low RESET pin; accepts external reset signal or internal SPOR/WDT assertion. |
| P137 | External interrupt | INTP0 input; used for wake-up from HALT/STOP modes on edge-triggered events. |
| PCLBUZ0 | Programmable clock/buzzer | Generates 2.44 kHz–10 MHz square wave; drives piezo buzzers or clocks external logic without MCU overhead. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power STOP mode | 0.61 µA typical at 3.0 V, –40°C to +85°C; enables multi-year battery life in wireless sensor endpoints. |
| Selectible SPOR detection voltage | Four thresholds (2.25 V / 2.68 V / 3.02 V / 4.45 V); ensures reliable startup across varying battery discharge profiles. |
| Real-time output (RTIO) | 8 independent RTIO channels; provides precise, jitter-free PWM outputs for motor control or lighting dimming. |
| On-chip debug interface | Integrated debug circuit supports flash programming and real-time trace without external JTAG adapter. |
| Peripheral I/O redirection (PIOR) | Hardware register enables dynamic remapping of UART/CSI/timer functions to alternate pins - simplifies PCB layout reuse. |
Applications
| Smart Home Sensor Node | Portable Medical Monitor |
|---|---|
|
Use Scenario: Battery-powered temperature/humidity sensor transmitting data via UART to BLE module. IC Role / Device Role / Timing Role: Main controller managing ADC sampling, data formatting, and UART transmission timing. Use Value: 8 KB flash stores firmware with CRC-protected OTA update handler; STOP mode current <1 µA extends 2-AA battery life beyond 3 years. |
Use Scenario: Handheld pulse oximeter with analog front-end and buzzer alert feedback. IC Role / Device Role / Timing Role: Signal processor coordinating ADC conversion, SpO₂ calculation, and PCLBUZ0-driven audible alerts. Use Value: Integrated 8/10-bit ADC eliminates external converter; ±2.0% oscillator accuracy ensures consistent buzzer tone across temperature range. |
| Industrial Control Panel | Energy-Efficient Appliance UI |
|
Use Scenario: Touch-key interface with LED indicators and RS-485 gateway connectivity. IC Role / Device Role / Timing Role: Key scanner and UART-to-RS485 bridge using KR0–KR7 and UART0 peripherals. Use Value: 18 GPIOs support 12-key matrix + 6 LEDs; N-ch open-drain outputs directly drive common-anode LED arrays. |
Use Scenario: Microwave oven control board with rotary encoder, display backlight, and safety interlocks. IC Role / Device Role / Timing Role: Real-time coordinator for encoder decoding, PWM backlight dimming, and door-switch monitoring. Use Value: 8-channel RTIO delivers synchronized PWM for backlight and fan control; BCD correction accelerates display digit formatting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F11W67ASM#50 | 4 KB flash, 512 B RAM; identical pinout, peripherals, and package. | Suitable for simpler firmware with smaller code footprint and lower RAM usage. | Select when application fits within 4 KB flash and does not require >512 B runtime variables. |
| R5F11Y68ASM#50 | RL78/G1N variant; adds high-current P-ch open-drain outputs on P00–P05 (–120 mA per pin). | Required for driving higher-current loads like segment LCD backplanes or relay coils directly. | Choose only if design requires >40 mA sink/source per P00–P05 pin; otherwise R5F11W68ASM#50 offers better cost/performance balance. |
Compared with R5F11W67ASM#50, the R5F11W68ASM#50 doubles flash and RAM capacity without changing footprint or power profile; compared with R5F11Y68ASM#50, it omits high-current drivers but maintains lower system cost and identical low-power behavior for standard I/O loads.
Availability
R5F11W68ASM#50 is available at Aetrix Electronics and suitable for smart home sensor nodes, portable medical monitors, industrial control panels, and energy-efficient appliance UIs requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for R5F11W68ASM#50 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 delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated consumer and industrial control applications - emphasizing minimal active/standby current and integrated analog peripherals.
FAQ
What is the maximum operating frequency and accuracy of the on-chip oscillator in R5F11W68ASM#50?
The R5F11W68ASM#50 features a high-speed on-chip oscillator selectable up to 20 MHz with ±2.0% accuracy over –20°C to +85°C. This eliminates external crystal requirements while maintaining timing integrity for UART baud generation and real-time output functions - critical for R5F11W68ASM#50-based sensor nodes where bill-of-materials cost and board space are constrained.
Does R5F11W68ASM#50 support real-time PWM output, and how many channels are available?
Yes, the R5F11W68ASM#50 provides 8 real-time output (RTIO) channels, enabling precise, hardware-timed PWM generation independent of CPU load. These channels are implemented in the TAU peripheral and support configurable duty cycle and period - making R5F11W68ASM#50 suitable for applications such as LED dimming, motor speed control, and buzzer tone generation without software intervention.
What are the power supply requirements and low-power modes supported by R5F11W68ASM#50?
R5F11W68ASM#50 operates from 2.25 V to 5.5 V and supports HALT mode (390–980 µA) and STOP mode (0.61–2.35 µA). Its selectable power-on-reset (SPOR) circuit has four detection thresholds (2.25 V / 2.68 V / 3.02 V / 4.45 V), ensuring robust startup across battery discharge curves - a key advantage for R5F11W68ASM#50 deployments in long-life battery-powered systems.
How many analog input channels does R5F11W68ASM#50 provide, and what is the resolution?
The R5F11W68ASM#50 integrates an 8/10-bit A/D converter with 8 analog input channels (ANI0–ANI7), supporting voltage ranges from 2.4 V to 5.5 V. This allows direct measurement of sensors like thermistors, potentiometers, and voltage dividers - essential for R5F11W68ASM#50-based environmental monitoring and user-interface feedback systems.
Is R5F11W68ASM#50 pin-compatible with other RL78/G1M devices, and what package does it use?
Yes, R5F11W68ASM#50 uses the standard 20-pin TSSOP package (4.4 × 6.5 mm, 0.65 mm pitch) shared across the RL78/G1M family, including R5F11W67ASM#50 and R5F11Y68ASM#50. Pin functions match the RL78/G1M block diagram and pin configuration - enabling drop-in replacement where flash/RAM or driver strength requirements align with R5F11W68ASM#50 specifications.
R5F11W68ASM#50 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:
R5F11W68ASM#50 FAQ
1.How can I place an order for R5F11W68ASM#50 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F11W68ASM#50 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 R5F11W68ASM#50 reliable?
The price and inventory of R5F11W68ASM#50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F11W68ASM#50 is usually 5 days.
3.What payment methods are accepted for R5F11W68ASM#50?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F11W68ASM#50 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F11W68ASM#50?
R5F11W68ASM#50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F11W68ASM#50 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 R5F11W68ASM#50?
For technical support, including R5F11W68ASM#50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F11W68ASM#50 requirements.
6.How does Aetrix verify that R5F11W68ASM#50 is sourced from the original manufacturer or authorized distributors?
All R5F11W68ASM#50 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 R5F11W68ASM#50 meets industry standards.
7.What is the process for return or replacement of R5F11W68ASM#50?
All R5F11W68ASM#50 units undergo pre-shipment inspection (PSI). If there is an issue with R5F11W68ASM#50, 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 R5F11W68ASM#50 part is unused and in its original packaging.
Return procedure for R5F11W68ASM#50:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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