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Renesas R5F21142SP#W4
- Part No.:
- R5F21142SP#W4
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F21142SP#W4.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,486
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Product details
Overview
R5F21142SP#W4 from Renesas Electronics is a 16-bit R8C/Tiny Series microcontroller with 8 KB flash program memory, 512 bytes RAM, and integrated 10-bit 4-channel ADC, designed for embedded control in electric household appliances and office equipment.
For engineers reviewing the R5F21142SP#W4 datasheet, R5F21142SP#W4 pinout, R5F21142SP#W4 application, or R5F21142SP#W4 equivalent, this MCU delivers deterministic 50 ns instruction execution at 20 MHz, low-power stop mode (0.7 µA), and LSSOP-20 packaging for space-constrained industrial sensor nodes and housing equipment interfaces.
Technical Context
The R5F21142SP#W4 implements the R8C/Tiny CPU core with 89 basic instructions and a 1 Mbyte unified address space. It integrates dual clock generation circuits - a main crystal oscillator (XIN/XOUT) and adjustable high-speed/low-speed on-chip oscillators - enabling flexible timing without external crystals in cost-sensitive designs.
Peripheral integration includes Timer X/Z (8-bit × 2), Timer C (16-bit with input capture/output compare), UART + clock-synchronous serial I/O, SSU interface, and four key-input interrupt pins (KI0–KI3). All I/O ports support programmable pull-up and LED drive capability on P1_0–P1_3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C/Tiny 16-bit, 89-instruction set, 50 ns min. instruction time at 20 MHz |
| Memory | 8 KB flash program ROM, 512 bytes RAM, no data flash (R8C/14 Group) |
| Analog Peripherals | 10-bit A/D converter, 4 input channels (AN8–AN11), VREF pin for reference voltage |
| 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 clock-synchronous serial I/O, 1 SSU (chip-select synchronous serial) |
| Power & Temp | VCC = 3.0–5.5 V, operating ambient: –20°C to +85°C, stop mode current = 0.7 µA @ 3.0 V |
| Package | LSSOP-20 (PLSP0020JB-A), 0.65 mm pitch, surface-mount compatible |
Pinout & Package
Package: 20-pin plastic molded LSSOP (PLSP0020JB-A), 0.65 mm lead pitch, JEDEC MS-013AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (P3_5) | SSCK / CMP1_2 | SSU clock I/O; comparator 1 output - enables synchronized peripheral communication or analog threshold detection |
| 2 (P3_7) | CNTR0 / SSO | Timer X counter input / SSU data output - supports pulse counting or serial data transmission |
| 3 (RESET) | Reset Input | Active-low asynchronous reset - requires external pull-up; initiates hardware reset sequence on falling edge |
| 4 (XOUT) | Main Clock Output | Crystal oscillator feedback output - used with XIN to drive ceramic resonator or crystal (1–20 MHz) |
| 5 (VSS/AVSS) | Digital & Analog Ground | Common 0 V reference for logic and ADC - separate AVSS improves analog noise immunity |
| 6 (XIN) | Main Clock Input | Primary clock source input - accepts crystal, resonator, or external clock signal up to 20 MHz |
| 7 (VCC) | Supply Voltage | Core and I/O power supply - operates from 3.0 V to 5.5 V; powers all digital and analog blocks |
| 8 (MODE) | Boot Mode Select | Connect to VCC via resistor to enable normal operation; determines startup vector and flash access mode |
| 9 (P4_5) | INT0 Input | External interrupt 0 trigger - supports edge-sensitive wake-up from low-power modes |
| 10 (P1_7) | CNTR00 / INT10 | Timer X channel 0 input / interrupt 10 - enables quadrature decoding or event counting |
| 11 (P1_6) | CLK0 | UART/serial transfer clock I/O - configurable as input or output for synchronous data framing |
| 12 (P1_5) | RXD0 / CNTR01 / INT11 | UART receive / Timer X channel 1 input / interrupt 11 - multiplexed for serial comms or timing capture |
| 13 (P1_4) | TXD0 | UART transmit output - drives RS-232 level-shifted or TTL-level serial data |
| 14 (P1_3) | KI3 / TZOUT / AN11 | Key input 3 / Timer Z output / ADC channel 4 - supports touch sensing, PWM dimming, or analog sensing |
| 15 (P1_2) | KI2 / CMP0_2 / AN10 | Key input 2 / comparator 0 output / ADC channel 3 - enables multi-function pin sharing in compact UIs |
| 16 (AVCC/VREF) | Analog Supply / Reference | ADC power and reference voltage input - connect to VCC and decouple with 0.1 µF capacitor to AVSS |
| 17 (P1_1) | KI1 / CMP0_1 / AN9 | Key input 1 / comparator 0 output / ADC channel 2 - reduces BOM count in appliance control panels |
| 18 (P1_0) | KI0 / CMP0_0 / AN8 | Key input 0 / comparator 0 output / ADC channel 1 - primary interface for front-panel buttons and sensors |
| 19 (P3_3) | INT3 / TCIN / CMP1_0 / SSI | External interrupt 3 / Timer C input / comparator 1 output / SSU data I/O - high-flexibility peripheral pin |
| 20 (P3_4) | CMP1_1 / SCS | Comparator 1 output / SSU chip-select - enables analog-triggered peripheral activation or SPI-like device selection |
Key Features
| Feature | Design Value |
|---|---|
| LED Drive Capability | P1_0–P1_3 support direct LED sinking up to 20 mA per pin - eliminates external drivers in status indicator designs |
| Low-Power Stop Mode | 0.7 µA typical current at 3.0 V - enables battery-powered operation for >1 year in sensor wake-on-event applications |
| Integrated Voltage Monitor | Dual voltage detection (VCA1/VCA2) with programmable thresholds - prevents code corruption during brown-out conditions |
| Hardware Watchdog Timer | 15-bit WDT with prescaler and reset-start select - ensures system recovery from software lockup without external components |
| Key Input Interrupts | Four dedicated KI0–KI3 pins with noise filtering (INT0F register) - enables robust mechanical button scanning with minimal firmware overhead |
| On-Chip Oscillator Tuning | HRA0–HRA2 registers allow ±10% frequency adjustment of high-speed on-chip oscillator - reduces need for external crystals in non-critical timing apps |
Applications
| Smart Appliance Control | Office Equipment Interface |
|---|---|
Use Scenario: Microcontroller in washing machine control board managing motor sequencing, water valve actuation, and user display. IC Role / Device Role / Timing Role: Primary system controller executing real-time state machine, driving LEDs via P1_0–P1_3, sampling temperature/pressure sensors via AN8–AN11. Use Value: Integrated 10-bit ADC and LED drive eliminate six external components; 50 ns instruction timing ensures precise motor commutation timing. |
Use Scenario: Embedded controller in multifunction printer handling paper feed detection, toner level sensing, and panel button response. IC Role / Device Role / Timing Role: Peripheral coordinator using KI0–KI3 for debounced button inputs, UART for host communication, and Timer C for encoder-based paper position tracking. Use Value: Key input interrupt filtering reduces firmware polling load; SSU interface connects to EEPROM for configuration storage without additional SPI controller. |
| Housing Security Sensor Node | Industrial Panel Meter |
Use Scenario: Battery-powered door/window contact sensor transmitting open/close events via UART to gateway. IC Role / Device Role / Timing Role: Ultra-low-power monitor using stop mode (0.7 µA), waking on INT0 from reed switch, sampling internal temperature via AN8 before transmission. Use Value: Sub-1 µA stop current extends CR2032 battery life beyond 24 months; integrated voltage monitor prevents false triggers during battery decay. |
Use Scenario: Front-panel meter in HVAC control system displaying temperature, humidity, and fan speed with local adjustment buttons. IC Role / Device Role / Timing Role: Human interface processor using P1_0–P1_3 to drive 4-digit LED display segments, AN9–AN11 for analog sensor inputs, and UART for Modbus RTU communication. Use Value: Single-chip solution replaces discrete LED driver + ADC + UART IC; 20-pin LSSOP fits narrow 24 mm panel cutouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21152SP#W4 | Same package and pinout; adds 2×1 KB data flash (10,000 write cycles) but identical program ROM (8 KB) and peripherals | Suitable where field firmware updates or parameter storage required; not needed for fixed-function control | Select R5F21152SP#W4 only if data flash persistence is mandatory; otherwise R5F21142SP#W4 offers lower cost and same core functionality |
| R5F21142DSP#W4 | Identical silicon except extended temperature range (–40°C to +85°C); same memory, peripherals, and LSSOP-20 package | Required for automotive cabin modules or outdoor industrial enclosures; unnecessary for indoor consumer appliances | Choose R5F21142DSP#W4 when operating below –20°C; standard R5F21142SP#W4 suffices for room-temperature environments |
Compared with R5F21152SP#W4, the R5F21142SP#W4 omits data flash to reduce cost and complexity in fixed-program applications; compared with R5F21142DSP#W4, it trades extended temperature tolerance for lower unit price in commercial-grade deployments.
Availability
R5F21142SP#W4 is available at Aetrix Electronics and suitable for smart appliance control, office equipment interfaces, and housing security sensor nodes requiring stable component supply across multi-year production cycles.
Supply support for R5F21142SP#W4 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 R5F21142SP#W4 belongs to the R8C/14 Group - a cost-optimized 16-bit MCU family targeting resource-constrained embedded systems in consumer and industrial equipment where flash size, low power, and peripheral integration are critical.
FAQ
What is the maximum operating frequency and corresponding supply voltage for the R5F21142SP#W4?
The R5F21142SP#W4 achieves a minimum instruction execution time of 50 ns at 20 MHz, requiring VCC = 3.0 V to 5.5 V. At 10 MHz, it supports down to 2.7 V. This allows full-speed operation across standard 3.3 V and 5 V systems without voltage translation.
Does the R5F21142SP#W4 include data flash memory?
No, the R5F21142SP#W4 belongs to the R8C/14 Group and contains only 8 KB of flash program memory. Data flash (1 KB × 2 blocks) is exclusive to the R8C/15 Group, such as the R5F21152SP#W4. The R5F21142SP#W4 relies on external EEPROM or RAM for non-volatile data storage.
Which pins on the R5F21142SP#W4 support LED drive functionality?
P1_0, P1_1, P1_2, and P1_3 on the R5F21142SP#W4 are configured as LED drive ports capable of sinking up to 20 mA per pin. These pins also serve as key inputs (KI0–KI3) and ADC channels (AN8–AN11), enabling shared use in compact HMI designs.
What low-power modes does the R5F21142SP#W4 support, and what is the lowest current consumption?
The R5F21142SP#W4 supports wait mode (35 µA typical at 3.0 V, peripheral clocks off) and stop mode (0.7 µA typical at 3.0 V). Stop mode halts the CPU, clocks, and most peripherals while retaining RAM and register contents, enabling ultra-low-power wake-on-interrupt operation.
Is the R5F21142SP#W4 pin-compatible with other devices in the R8C/Tiny family?
Yes, the R5F21142SP#W4 shares the PLSP0020JB-A (LSSOP-20) package and identical pin assignment with all R8C/14 and R8C/15 Group members, including R5F21143SP#W4, R5F21152SP#W4, and R5F21142DSP#W4. Pin functions are consistent across the group, enabling hardware reuse.
R5F21142SP#W4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- R8C/1x/14
- Packaging:
- Tape & Reel (TR)
- 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:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F21142SP#W4 FAQ
1.How can I place an order for R5F21142SP#W4 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21142SP#W4 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 R5F21142SP#W4 reliable?
The price and inventory of R5F21142SP#W4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21142SP#W4 is usually 5 days.
3.What payment methods are accepted for R5F21142SP#W4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21142SP#W4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21142SP#W4?
R5F21142SP#W4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21142SP#W4 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 R5F21142SP#W4?
For technical support, including R5F21142SP#W4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21142SP#W4 requirements.
6.How does Aetrix verify that R5F21142SP#W4 is sourced from the original manufacturer or authorized distributors?
All R5F21142SP#W4 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 R5F21142SP#W4 meets industry standards.
7.What is the process for return or replacement of R5F21142SP#W4?
All R5F21142SP#W4 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21142SP#W4, 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 R5F21142SP#W4 part is unused and in its original packaging.
Return procedure for R5F21142SP#W4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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