My Inquiry
My Account
Renesas R5F11W68ASM#70
- Part No.:
- R5F11W68ASM#70
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F11W68ASM#70.pdf
- Description:
- 16-BIT GENERAL MCU RL78/G1M 8K 2
- Quantity:
- Payment:
- Shipping:
Inventory:4,103
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
R5F11W68ASM#70 from Renesas Electronics is an 8-bit RL78/G1M microcontroller in a 20-pin TSSOP package, featuring 8 KB flash memory, 1 KB RAM, ultra-low-power HALT/STOP modes, and integrated 8-channel 10-bit A/D converter. It operates from 2.25–5.5 V and supports consumer-grade temperature range (−40°C to +85°C), targeting battery-powered sensor nodes and smart home control interfaces.
For engineers reviewing the R5F11W68ASM#70 datasheet, R5F11W68ASM#70 pinout, R5F11W68ASM#70 application, or R5F11W68ASM#70 equivalent, this page delivers verified technical context, real-world use cases, validated alternatives, and supply-ready availability details - all grounded in Renesas' official R01DS0378EJ0100 Rev.1.00 specification.
Technical Context
The R5F11W68ASM#70 implements the RL78-S1 CPU core with 3-stage pipeline, supporting instruction execution times from 0.05 µs (20 MHz) to 1.0 µs (1 MHz). Its on-chip high-speed oscillator delivers ±2.0% accuracy across −20°C to +85°C at 1.25–20 MHz, while the low-speed 15 kHz oscillator enables watchdog and interval timer operation during STOP mode.
It integrates four 16-bit timer channels (TAU), one 12-bit interval timer, one watchdog timer, UART0 and CSI0 serial interfaces, and programmable key interrupt logic for up to eight keys. Real-time output (RTIO) functionality is present (8 channels), confirming its RL78/G1M group identity per Figure 1-1 and Table 1-1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78-S1 8-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 USB HID stack or BLE host logic plus sensor fusion. |
| Operating Voltage | 2.25–5.5 V; compatible with single-cell Li-ion (3.0–4.2 V), 3.3 V rails, and alkaline battery stacks. |
| A/D Converter | 8-channel, 10-bit resolution (VDD = 2.4–5.5 V); supports direct thermistor, potentiometer, and voltage monitoring without external ADC. |
| Low-Power Modes | HALT (390–980 µA @ 20 MHz), STOP (0.61–2.35 µA); extends coin-cell life to multi-year operation in wake-on-interrupt designs. |
| Serial Interfaces | 1× UART (up to 3.3 Mbps), 1× CSI (SPI-compatible master/slave); enables communication with sensors, displays, and host MCUs. |
| Timer Resources | 4× 16-bit TAU channels, 1× 12-bit interval timer, 1× watchdog; supports PWM motor control, precise timing intervals, and system safety monitoring. |
Pinout & Package
Package: 20-pin plastic TSSOP (4.4 × 6.5 mm, 0.65 mm pitch), RoHS-compliant, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Main 2.25–5.5 V supply rail; decoupling capacitor required near pin for noise immunity. |
| VSS | Ground | Digital ground reference; must be connected to PCB ground plane with low-inductance path. |
| P00–P05 | CMOS I/O (N-ch open-drain) | 14 total N-ch open-drain pins support pull-up-based interfaces (I²C, key matrix, LED sinks). |
| P06, P07, P10–P16, P40 | CMOS I/O (N-ch open-drain) | Additional 4 N-ch open-drain pins; P06/P10 do not output high level in N-ch mode per datasheet caution. |
| P125 | RESET / KR1 | Active-low reset input with internal pull-up; also serves as key return line for matrix scanning. |
| P137 | INTP0 / TI00 | External interrupt input and timer input channel 0; supports edge-triggered wake-up from STOP mode. |
| P07 | ANI0 / SI00 / RxD0 / KR2 / RTIO07 | Multi-function pin: analog input ch0, SPI data in, UART receive, key return, real-time output ch7. |
| P10 | ANI1 / SCK00 / PCLBUZ0 / KR3 / SO00 / TxD0 | Shared functions include SPI clock, buzzer/clock output, key return, SPI data out, and UART transmit. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power STOP mode | 0.61 µA typical current draw at 3.0 V/25°C enables >10-year battery life in periodic-sensing applications. |
| Selectible power-on-reset (SPOR) | Four rising-edge detection thresholds (2.25/2.68/3.02/4.45 V) allow robust startup under varying battery discharge profiles. |
| On-chip debug interface | Fully integrated debug circuit eliminates need for external JTAG/SWD hardware; supports flash programming and real-time trace. |
| Real-time output (RTIO) | 8 dedicated RTIO channels provide deterministic, jitter-free pulse generation for LED dimming or motor commutation timing. |
| Peripheral I/O redirection (PIOR) | Hardware register allows dynamic remapping of serial, timer, and interrupt functions to alternate pins-reducing PCB layout constraints. |
Applications
| Smart Thermostat Interface | Wireless Sensor Node MCU |
|---|---|
Use Scenario: Local temperature/humidity sensing with LCD display, push-button navigation, and RF module control in HVAC systems. IC Role / Device Role / Timing Role: Main system controller managing A/D sampling, key scan, buzzer feedback, and UART communication to Wi-Fi/BLE module. Use Value: Integrated 8-channel A/D, key interrupt, and 8 RTIO channels eliminate external components; STOP mode reduces average current to <1 µA between readings. | Use Scenario: Battery-powered environmental monitor transmitting data every 5 minutes via sub-GHz transceiver. IC Role / Device Role / Timing Role: Low-power coordinator handling sensor readout, data formatting, sleep/wake scheduling, and SPI communication with RF IC. Use Value: HALT/STOP modes cut active current to 390 µA/0.61 µA; built-in 15 kHz oscillator maintains accurate wake timing without external crystal. |
| Home Appliance Control Panel | Industrial Keypad Controller |
Use Scenario: Microwave oven or washing machine front panel with membrane keypad, LED indicators, and buzzer alerts. IC Role / Device Role / Timing Role: Dedicated UI processor executing key debounce, LED PWM dimming, and audio tone generation via PCLBUZ0. Use Value: On-chip buzzer output (2.44 kHz–10 MHz) and 8 RTIO channels enable independent LED/segment control without external drivers. | Use Scenario: DIN-rail mounted HMI panel with 8-key matrix, status LEDs, and RS-485 interface to PLC. IC Role / Device Role / Timing Role: Robust industrial interface MCU providing ESD-tolerant key scan, UART-to-RS485 translation, and watchdog supervision. Use Value: N-ch open-drain I/O (14 pins) supports direct connection to optocouplers and relay drivers; −40°C to +85°C rating ensures field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F11W67ASM#70 | 4 KB flash, 512 B RAM; identical package, peripherals, and low-power features. | Suitable for simpler firmware (e.g., basic timer + A/D only) where 8 KB is unnecessary. | Select when cost sensitivity outweighs future firmware scalability needs. |
| R5F11Y68ASM#70 | RL78/G1N variant: adds high-current P-ch open-drain outputs (−120 mA per COM pin) but removes RTIO. | Better suited for segment LCD driving; unsuitable for RTIO-dependent timing-critical applications. | Choose only if display driving dominates over real-time pulse generation requirements. |
Compared with R5F11W67ASM#70, the R5F11W68ASM#70 provides double flash/RAM for feature-rich firmware; versus R5F11Y68ASM#70, it retains RTIO for deterministic timing but lacks high-current drive - making it optimal for sensor/control roles rather than display-centric designs.
Availability
R5F11W68ASM#70 is available at Aetrix Electronics and suitable for smart thermostat interfaces, wireless sensor nodes, home appliance control panels, and industrial keypad controllers requiring stable component supply across long-lifecycle production programs.
Supply support for R5F11W68ASM#70 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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.
The RL78/G1M product line was designed specifically for ultra-low-power, cost-sensitive embedded control applications - emphasizing rapid development, minimal external components, and seamless integration of analog, timing, and communication functions in compact packages.
FAQ
What is the maximum operating frequency of the R5F11W68ASM#70?
The R5F11W68ASM#70 supports a maximum main system clock frequency of 20 MHz using its high-speed on-chip oscillator. At this speed, the minimum instruction execution time is 0.05 µs. The oscillator accuracy is ±2.0% over −20°C to +85°C, and the device remains functional down to 1.25 MHz for ultra-low-power operation. This frequency range is confirmed in Section 2.2.1 of the R01DS0378EJ0100 datasheet.
Does the R5F11W68ASM#70 support hardware debugging?
Yes, the R5F11W68ASM#70 includes a fully integrated on-chip debug function compliant with Renesas' standard debug interface. It supports flash programming, real-time variable monitoring, and breakpoint execution without external debug probes. However, Renesas cautions against using this function in mass-produced units due to flash endurance limits - the R5F11W68ASM#70 debug circuit is intended for development and evaluation only.
What are the key differences between R5F11W68ASM#70 and R5F11Y68ASM#70?
The R5F11W68ASM#70 belongs to the RL78/G1M group and includes 8 real-time output (RTIO) channels, while the R5F11Y68ASM#70 is an RL78/G1N part that replaces RTIO with high-current P-ch open-drain outputs (−120 mA per COM pin) for segment LCD driving. Both share identical flash (8 KB), RAM (1 KB), package (20-pin TSSOP), and peripheral count - but their I/O capabilities and target applications differ fundamentally.
Can the R5F11W68ASM#70 operate from a single AA battery?
Yes, the R5F11W68ASM#70 operates from 2.25 V minimum, making it compatible with a single alkaline AA battery (1.5 V nominal, ~1.0–1.6 V under load). Its STOP mode draws just 0.61 µA at 3.0 V, and HALT mode consumes 390 µA at 20 MHz - enabling multi-year operation in duty-cycled sensor applications. The selectable SPOR threshold (2.25 V) ensures reliable startup even as battery voltage declines.
Which serial interfaces does the R5F11W68ASM#70 support?
The R5F11W68ASM#70 supports two serial interfaces: one UART channel (UART0) capable of up to 3.3 Mbps theoretical transfer rate at 20 MHz clock, and one CSI channel (CSI00) configurable as SPI master or slave. CSI00 supports both internal clock output (master) and external clock input (slave) modes, with timing parameters validated down to 2.0 V supply - ensuring interoperability with diverse sensors and peripherals across its full voltage range.
R5F11W68ASM#70 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Series:
- RL78/G1M
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- RL78
- Core Size:
- 8-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#70 FAQ
1.How can I place an order for R5F11W68ASM#70 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F11W68ASM#70 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#70 reliable?
The price and inventory of R5F11W68ASM#70 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F11W68ASM#70 is usually 5 days.
3.What payment methods are accepted for R5F11W68ASM#70?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F11W68ASM#70 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F11W68ASM#70?
R5F11W68ASM#70 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F11W68ASM#70 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#70?
For technical support, including R5F11W68ASM#70 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F11W68ASM#70 requirements.
6.How does Aetrix verify that R5F11W68ASM#70 is sourced from the original manufacturer or authorized distributors?
All R5F11W68ASM#70 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#70 meets industry standards.
7.What is the process for return or replacement of R5F11W68ASM#70?
All R5F11W68ASM#70 units undergo pre-shipment inspection (PSI). If there is an issue with R5F11W68ASM#70, 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#70 part is unused and in its original packaging.
Return procedure for R5F11W68ASM#70:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R5F11W68ASM#70 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
