My Inquiry
My Account
Renesas R5F103A8ASP#70
- Part No.:
- R5F103A8ASP#70
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 30-LSSOP (0.240", 6.10mm Width)
- Datasheet:
-
R5F103A8ASP#70.pdf
- Description:
- 16-BIT GENERAL MCU RL78/G12 8K 3
- Quantity:
- Payment:
- Shipping:
Inventory:4,402
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
R5F103A8ASP#70 from Renesas Electronics is a 30-pin LSSOP packaged 16-bit RL78/G12 microcontroller for low-power embedded control, featuring 8 KB code flash, 512 B RAM, 8-channel 10-bit A/D converter, 1-channel UART, and operation from 1.8 V to 5.5 V across –40°C to +85°C. It delivers 31 DMIPS at 24 MHz and supports HALT/STOP/SNOOZE power modes for battery-powered sensor nodes and industrial HMI panels.
For engineers reviewing the R5F103A8ASP#70 datasheet, R5F103A8ASP#70 pinout, R5F103A8ASP#70 application, or R5F103A8ASP#70 equivalent, key selection criteria include its 30-pin LSSOP package, absence of data flash memory, single UART channel, lack of DMA controller, and ±5.0% high-speed on-chip oscillator accuracy over –40°C to +85°C.
Technical Context
The R5F103A8ASP#70 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, supporting minimum instruction execution time of 0.04167 µs at 24 MHz using the high-speed on-chip oscillator. Its memory map spans 1 MB address space with 8 KB code flash organized in 1 KB blocks and no data flash - distinguishing it from R5F102-series variants.
Peripheral integration includes one 16-bit timer array (TAU) with 8 channels, one 12-bit interval timer, one window watchdog timer, and simplified SPI (CSI) and I²C interfaces disabled - leaving only UART0 active among serial options. I/O capability comprises 26 pins including 9 N-ch open-drain outputs (VDD-tolerant), analog inputs ANI0–ANI3 and ANI16–ANI19, and dedicated reset, crystal (X1/X2), and regulator capacitor (REGC) terminals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | RL78 16-bit CISC with 3-stage pipeline, 1 MB address space |
| Operating Voltage | 1.8 V to 5.5 V - enables direct interface with 1.8/2.5/3.3/5 V logic and battery-powered operation |
| Flash / RAM | 8 KB code flash (1 KB blocks), no data flash, 512 B RAM - sufficient for compact firmware with no background data logging |
| ADC | 10-bit resolution, 8 input channels (ANI0–ANI3, ANI16–ANI19) - supports multi-sensor analog monitoring without external mux |
| Timers | 8-channel 16-bit TAU, 1-channel 12-bit interval timer, 1-channel window watchdog - enables precise PWM generation and system supervision |
| Serial Interfaces | 1 UART channel (UART0), no CSI or I²C - suitable for point-to-point host communication only |
| Power Modes | HALT, STOP, SNOOZE - achieves 63 μA/MHz active current and sub-μA standby for energy-constrained designs |
Pinout & Package
Package: 30-pin plastic LSSOP (7.62 mm, 0.65-mm pitch), RoHS-compliant, surface-mountable with exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P20/ANI0/AVREFP | Analog input / positive reference | Primary ADC reference input; accepts 0–VDD analog signals with internal 1.45 V reference option |
| P01/ANI16/TO00/RxD1 | Analog input / timer output / UART1 receive | Shared function pin - configured as ADC input or UART1 RX when enabled; TO00 usable for PWM |
| P00/ANI17/TI00/TxD1 | Analog input / timer input / UART1 transmit | Enables dual-role use: analog sensing or full-duplex UART1 communication with TI00 for edge-triggered capture |
| P120/ANI19 | Analog input | Dedicated ADC channel for third-party sensor interfacing without multiplexing conflict |
| RESET | Active-low reset input | Asynchronous hardware reset with internal pull-up; triggers POR/LVD-initiated recovery sequences |
| X1 / X2 | Crystal oscillator connections | Supports 1–20 MHz external crystal for precise timing; requires external load capacitors per layout guidelines |
| REGC | Voltage regulator capacitor terminal | Must connect 0.47–1 µF capacitor to VSS - critical for stable internal voltage regulation and ADC accuracy |
| VDD / VSS | Power supply / ground | Single-supply operation; decoupling capacitors required near each VDD pin per layout best practices |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power consumption | 63 μA/MHz active current enables >1-year battery life in coin-cell–powered sensor endpoints |
| On-chip high-speed oscillator | 24 MHz option with ±5.0% accuracy (–40°C to +85°C) eliminates need for external crystal in cost-sensitive applications |
| Hardware CRC engine | Not present - distinguishes R5F103A8ASP#70 from R5F102A8ASP#70 and excludes built-in firmware integrity checking |
| Self-programming capability | Supported for code flash only - no data flash available; requires flash shield window configuration for security |
| DMA controller | Not integrated - data movement between peripherals and RAM must be handled by CPU, increasing firmware overhead |
Applications
| Smart Home Sensor Node | Industrial HMI Panel |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor transmitting data via UART to gateway MCU. IC Role / Device Role / Timing Role: Primary system controller executing sensor acquisition, local processing, and UART-based telemetry. Use Value: 63 μA/MHz active current and SNOOZE mode extend CR2032 battery life beyond 18 months; 8-channel ADC reads multiple sensors without external mux. | Use Scenario: Front-panel interface for PLC-controlled HVAC system with pushbutton inputs and LED indicators. IC Role / Device Role / Timing Role: Dedicated UI controller managing keypad scanning, LED/PWM dimming, and status reporting via UART to main controller. Use Value: 26 GPIOs (including 9 N-ch open-drain) drive LEDs and read buttons directly; 8-channel TAU generates independent PWMs for brightness control. |
| White Goods Control Module | Medical Diagnostic Handheld |
Use Scenario: Motor speed and door-lock monitoring subsystem in washing machine control board. IC Role / Device Role / Timing Role: Safety-critical auxiliary controller verifying motor commutation feedback and lock actuator status. Use Value: Window watchdog timer and voltage detector (12-level LVD) provide hardware-enforced fault detection; –40°C to +85°C rating ensures reliability in hot appliance enclosures. | Use Scenario: Portable blood glucose meter requiring precise analog measurement and low-power display interface. IC Role / Device Role / Timing Role: Signal acquisition and processing unit digitizing electrochemical sensor output and driving LCD segments. Use Value: 10-bit ADC with internal 1.45 V reference achieves <±1 LSB INL; 1.8 V minimum supply allows direct Li-ion battery operation without buck conversion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F102A8ASP#70 | Includes 2 KB data flash, CRC engine, RAM guard, and ±1.0% oscillator accuracy; same pinout and package | Required where background data logging or firmware checksum validation is mandatory | Select when non-volatile parameter storage or enhanced safety features are needed - adds ~$0.15 cost |
| R5F103AAASP#70 | 16 KB code flash, 2 KB RAM, identical peripheral set and oscillator spec; same 30-pin LSSOP package | Suitable for larger firmware images or future-proofing with memory headroom | Choose when firmware size exceeds 8 KB or additional RAM is required for complex state machines |
Compared with R5F102A8ASP#70, the R5F103A8ASP#70 trades data flash and tighter oscillator tolerance for lower cost and reduced feature set; versus R5F103AAASP#70, it offers identical functionality at lower memory density and price - ideal for cost-optimized, fixed-function implementations.
Availability
R5F103A8ASP#70 is available at Aetrix Electronics and suitable for smart home sensor nodes, industrial HMI panels, white goods control modules, and medical diagnostic handhelds requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for R5F103A8ASP#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 trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets.
The RL78/G12 product line targets ultra-low-power general-purpose microcontrollers for cost-sensitive, battery-operated, and industrial control applications - emphasizing energy efficiency, integration, and ease of development.
FAQ
What is the maximum operating frequency of the R5F103A8ASP#70?
The R5F103A8ASP#70 supports a maximum high-speed on-chip oscillator frequency of 24 MHz, delivering 31 DMIPS performance. External crystal operation is rated up to 20 MHz (1.8–5.5 V supply). Instruction execution time is 0.04167 µs at 24 MHz, confirmed in the RL78/G12 datasheet Rev.2.50 Section 1.1.
Does the R5F103A8ASP#70 include data flash memory?
No, the R5F103A8ASP#70 does not include data flash memory. Per Section 1.3.1 of the RL78/G12 datasheet, data flash (2 KB) is mounted only on R5F102-series devices. The R5F103A8ASP#70 provides 8 KB code flash only, with self-programming supported exclusively for code memory.
What are the key differences between R5F103A8ASP#70 and R5F102A8ASP#70?
The R5F103A8ASP#70 lacks data flash, CRC engine, RAM guard, SFR guard, and DMA controller present in R5F102A8ASP#70. Its high-speed on-chip oscillator accuracy is ±5.0% (–40°C to +85°C) versus ±1.0% for the R5F102 variant. Both share identical 30-pin LSSOP packaging and core peripherals like UART0 and 8-channel ADC.
Which serial interfaces are available on the R5F103A8ASP#70?
The R5F103A8ASP#70 provides one UART channel (UART0). Simplified SPI (CSI) and I²C interfaces are not implemented - unlike R5F102A8ASP#70, which includes CSI and I²C. This makes R5F103A8ASP#70 suitable for simple host communication but not multi-device bus topologies.
What is the purpose of the REGC pin on the R5F103A8ASP#70?
The REGC pin on the R5F103A8ASP#70 connects to an external 0.47–1 µF capacitor tied to VSS, stabilizing the internal voltage regulator for analog circuitry and ADC accuracy. Failure to populate this capacitor degrades AVREF stability and increases ADC measurement error - a mandatory design requirement per datasheet Section 1.4.3 and Absolute Maximum Ratings Table.
R5F103A8ASP#70 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 30-LSSOP (0.240", 6.10mm Width)
- Series:
- RL78/G12
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- RL78
- Core Size:
- 16-Bit
- Speed:
- 24MHz
- Connectivity:
- CSI, I2C, UART/USART
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 23
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 768 x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 5.5V
- Data Converters:
- A/D 8x8/10b
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F103A8ASP#70 FAQ
1.How can I place an order for R5F103A8ASP#70 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F103A8ASP#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 R5F103A8ASP#70 reliable?
The price and inventory of R5F103A8ASP#70 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F103A8ASP#70 is usually 5 days.
3.What payment methods are accepted for R5F103A8ASP#70?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F103A8ASP#70 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F103A8ASP#70?
R5F103A8ASP#70 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F103A8ASP#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 R5F103A8ASP#70?
For technical support, including R5F103A8ASP#70 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F103A8ASP#70 requirements.
6.How does Aetrix verify that R5F103A8ASP#70 is sourced from the original manufacturer or authorized distributors?
All R5F103A8ASP#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 R5F103A8ASP#70 meets industry standards.
7.What is the process for return or replacement of R5F103A8ASP#70?
All R5F103A8ASP#70 units undergo pre-shipment inspection (PSI). If there is an issue with R5F103A8ASP#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 R5F103A8ASP#70 part is unused and in its original packaging.
Return procedure for R5F103A8ASP#70:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R5F103A8ASP#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…
