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Renesas R5F21154DSP#U0
- Part No.:
- R5F21154DSP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F21154DSP#U0.pdf
- Description:
- IC MCU 16BIT 16KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,974
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Product details
Overview
R5F21154DSP#U0 from Renesas Electronics is a 16-bit R8C/Tiny Series microcontroller with 16 KB program flash ROM, 1 KB data flash (2 × 1 KB blocks), and 1 KB RAM, packaged in a 20-pin LSSOP (PLSP0020JB-A). It integrates a 10-bit 4-channel ADC, three timers (8-bit ×2, 16-bit ×1), UART/SSU serial interfaces, LED drive ports, and operates across -40°C to +85°C for industrial appliance control.
For engineers reviewing the R5F21154DSP#U0 datasheet, R5F21154DSP#U0 pinout, R5F21154DSP#U0 application, or R5F21154DSP#U0 equivalent, this MCU delivers deterministic real-time control in space-constrained embedded systems requiring nonvolatile data logging, sensor interfacing, and low-power operation with integrated voltage detection and watchdog timer.
Technical Context
The R5F21154DSP#U0 implements the R8C/Tiny CPU core with 89 basic instructions and executes at 50 ns minimum instruction time (20 MHz XIN, 3.0–5.5 V). Its memory architecture supports 1 Mbyte address space, with fixed interrupt vector table at 0FFDCh–0FFFFh and dedicated data flash region at 02400h–02BFFh for field-updatable configuration storage.
Peripheral integration includes dual clock generation circuits (main crystal oscillator + high/low-speed on-chip oscillators with frequency adjustment), oscillation stop detection, power-on reset, and voltage detection circuitry-enabling robust operation in variable supply environments without external supervision components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C/Tiny 16-bit, 89-instruction set, 50 ns min. execution (20 MHz) |
| Memory | 16 KB program flash ROM + 2 KB data flash (1 KB ×2 blocks) + 1 KB RAM |
| ADC | 10-bit resolution, 4 input channels, single-ended analog inputs AN8–AN11 |
| Timers | Timer X/Z (8-bit ×2, each with 8-bit prescaler); Timer C (16-bit with input capture/output compare) |
| Serial Interfaces | 1 UART channel + 1 SSU (chip-select synchronous serial I/O) channel |
| Operating Temp | -40°C to +85°C (D-version qualification, suitable for industrial ambient) |
| Supply Voltage | 2.7 V to 5.5 V; supports 20 MHz operation at 3.0–5.5 V |
| Power Modes | Stop mode: 0.7 µA @ 3.0 V; Wait mode: 35 µA @ 3.0 V, peripheral clocks off |
Pinout & Package
Package: 20-pin plastic molded LSSOP (PLSP0020JB-A), 0.65 mm pitch, surface-mount, JEDEC MS-013AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1_0 / KI0 / AN8 / CMP0_0 | Multi-function I/O port | Configurable as key interrupt input, analog input channel 0, or comparator output 0 |
| P1_4 / TXD0 | UART transmit output | Drives serial data output for asynchronous communication; open-drain capable |
| P3_3 / TCIN / INT3 / SSI / CMP1_0 | Multi-function input | Accepts Timer C input capture, external interrupt 3, SSU data I/O, or comparator 1 input |
| XIN / P4_6 | Main clock input | Accepts external crystal (1–20 MHz) or ceramic resonator; internal feedback resistor provided |
| RESET | Active-low reset input | Asynchronous hardware reset; internal pull-up ensures valid state during power ramp |
| VCC / VSS / AVCC / AVSS | Power supply terminals | Dual power domains: digital (VCC/VSS) and analog (AVCC/AVSS) with separate decoupling requirements |
Key Features
| Feature | Design Value |
|---|---|
| Data flash endurance | 10,000 program/erase cycles per block-supports firmware parameter updates in field-deployed units |
| LED drive capability | P1_0–P1_3 support direct LED sink up to 20 mA per pin-eliminates external drivers in indicator applications |
| On-chip oscillator tuning | High-speed on-chip oscillator adjustable via HRA0/HRA1 registers-enables ±1% accuracy without external crystal |
| Low-power stop mode | 0.7 µA typical current draw @ 3.0 V-extends battery life in intermittently active sensor nodes |
| Integrated voltage monitor | Voltage Detection Circuit (VCA1/VCA2) and Power-On Reset (POR)-ensures reliable boot and brown-out recovery |
| Interrupt priority levels | 7-level nested priority (IPL bits in FLG register)-enables deterministic response to time-critical events |
Applications
| Home Appliance Control | Industrial Sensor Node |
|---|---|
|
Use Scenario: Microcontroller in washing machine main control board managing motor sequencing, water level sensing, and user interface. IC Role / Device Role / Timing Role: Real-time task scheduler and analog sensor hub with ADC-triggered PWM for motor phase control. Use Value: Integrated data flash stores calibration offsets and cycle history; LED drive ports directly illuminate status indicators without external transistors. |
Use Scenario: Standalone temperature/humidity monitoring node with RS-485 backhaul in factory HVAC ducts. IC Role / Device Role / Timing Role: Sensor signal conditioner and UART-to-SSU protocol bridge with wake-on-interrupt capability. Use Value: -40°C to +85°C rating ensures reliability in unconditioned environments; 0.7 µA stop mode extends 10-year battery life. |
| Office Equipment UI | Security System Keypad |
|
Use Scenario: Control unit for multifunction printer panel with button matrix, LCD backlight, and status LEDs. IC Role / Device Role / Timing Role: Key interrupt handler (KI0–KI3) and LED driver with scan timing managed by Timer Z. Use Value: Dedicated key input pins reduce GPIO polling overhead; 4-pin LED drive port simplifies PCB layout and BOM. |
Use Scenario: Tamper-resistant access keypad with encrypted PIN entry and local alarm triggering. IC Role / Device Role / Timing Role: Secure input processor with watchdog timer supervision and voltage-detection-based tamper flagging. Use Value: Oscillation stop detection prevents clock manipulation attacks; data flash stores encrypted keys with 10k-cycle durability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21154SP | No extended temperature grade; rated -20°C to +85°C only | Suitable for indoor consumer electronics where ambient extremes are absent | Select R5F21154SP when industrial-grade thermal margin is unnecessary and cost optimization is prioritized |
| R5F21153DSP | 12 KB program ROM, 512 bytes RAM, same data flash and peripherals | Fits smaller firmware footprints; retains full peripheral compatibility for scaled-down designs | Choose R5F21153DSP when application code size remains under 12 KB and memory headroom is acceptable |
Compared with R5F21154SP and R5F21153DSP, the R5F21154DSP#U0 provides maximum program storage and guaranteed operation down to -40°C-making it optimal for new industrial designs requiring future firmware expansion and wide-temperature deployment.
Availability
R5F21154DSP#U0 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, office equipment UI, and security system keypads requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for R5F21154DSP#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 formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions.
The R8C/15 Group-including R5F21154DSP#U0-is designed for cost-sensitive, space-constrained embedded control in appliances, industrial equipment, and sensor interfaces where integrated data flash and extended temperature operation are critical.
FAQ
What is the maximum operating frequency of the R5F21154DSP#U0?
The R5F21154DSP#U0 supports a maximum external clock frequency of 20 MHz on the XIN pin, achieving a 50 ns minimum instruction execution time at VCC = 3.0–5.5 V. Its on-chip high-speed oscillator can be tuned for accurate operation without an external crystal, though maximum stability and precision require the main crystal oscillator circuit.
Does the R5F21154DSP#U0 include built-in voltage monitoring?
Yes, the R5F21154DSP#U0 integrates both a voltage detection circuit (VCA1/VCA2 registers) and a power-on reset (POR) circuit. These features ensure reliable initialization and brown-out protection across its 2.7–5.5 V supply range, eliminating the need for external supervisor ICs in most applications.
How many times can the data flash in the R5F21154DSP#U0 be rewritten?
The data flash in the R5F21154DSP#U0 consists of two 1 KB blocks with a guaranteed endurance of 10,000 program/erase cycles per block. This specification is validated under standard operating conditions and enables robust field updates of calibration data, device configuration, or usage logs.
What package type is used for the R5F21154DSP#U0?
The R5F21154DSP#U0 is housed in a 20-pin plastic molded LSSOP package designated PLSP0020JB-A. This JEDEC MS-013AC-compliant package has a 0.65 mm lead pitch and is optimized for automated surface-mount assembly in high-volume manufacturing.
Can the R5F21154DSP#U0 operate without an external crystal?
Yes-the R5F21154DSP#U0 includes a tunable high-speed on-chip oscillator that supports full functionality without an external crystal. While the main crystal oscillator (XIN/XOUT) is required for highest accuracy or frequencies above 10 MHz, the on-chip oscillator enables rapid prototyping and cost reduction in less timing-critical applications.
R5F21154DSP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- R8C/1x/15
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- SIO, SSU, 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:
- -
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F21154DSP#U0 FAQ
1.How can I place an order for R5F21154DSP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21154DSP#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 R5F21154DSP#U0 reliable?
The price and inventory of R5F21154DSP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21154DSP#U0 is usually 5 days.
3.What payment methods are accepted for R5F21154DSP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21154DSP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21154DSP#U0?
R5F21154DSP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21154DSP#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 R5F21154DSP#U0?
For technical support, including R5F21154DSP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21154DSP#U0 requirements.
6.How does Aetrix verify that R5F21154DSP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F21154DSP#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 R5F21154DSP#U0 meets industry standards.
7.What is the process for return or replacement of R5F21154DSP#U0?
All R5F21154DSP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21154DSP#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 R5F21154DSP#U0 part is unused and in its original packaging.
Return procedure for R5F21154DSP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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