My Inquiry
My Account
Renesas R5F21142SP#U0
- Part No.:
- R5F21142SP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 20-LSSOP (0.173", 4.40mm Width)
- Datasheet:
-
R5F21142SP#U0.pdf
- Description:
- IC MCU 16BIT 8KB FLASH 20LSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,693
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
R5F21142SP#U0 from Renesas Electronics is a 16-bit R8C/Tiny Series microcontroller with 8 KB flash program memory, 512 bytes RAM, and a 20-pin LSSOP package. It integrates an 8-bit ×1 Timer X, 8-bit ×1 Timer Z, 16-bit ×1 Timer C with input capture/output compare, 10-bit ×4-channel ADC, UART/serial I/O, and on-chip oscillators. It targets low-power embedded control in consumer appliance motor drives and sensor interfaces.
For engineers reviewing the R5F21142SP#U0 datasheet, R5F21142SP#U0 pinout, R5F21142SP#U0 application, or R5F21142SP#U0 equivalent, this page delivers verified specifications, validated pin functions, confirmed operating conditions (−20°C to +85°C, 2.7–5.5 V), real-world use cases, and two technically documented alternative parts for design continuity.
Technical Context
The R5F21142SP#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 provides 1 Mbyte address space, fixed interrupt vector table at 0FFDCh–0FFFFh, and flash-based program storage without data flash-distinguishing it from R8C/15 group members.
It features dual clock generation: main crystal/ceramic resonator circuit (XIN/XOUT) and high-/low-speed on-chip oscillators with frequency adjustment capability. Peripheral control uses dedicated SFRs-including PM0/PM1 for processor mode, CM0/CM1 for clock control, and individual interrupt enable registers per peripheral-enabling precise power and timing management in resource-constrained systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C/Tiny 16-bit, 89-instruction set, 50 ns min. execution (20 MHz) |
| Memory | 8 KB flash program ROM, 512 bytes RAM, no data flash (R8C/14 group) |
| Supply Voltage | 2.7–5.5 V - supports single-supply operation across industrial and consumer rails |
| Operating Temp | −20°C to +85°C - standard-grade qualification for office equipment and home appliances |
| Power Consumption | 0.7 µA in stop mode - enables battery-backed standby in sensor nodes |
| ADC | 10-bit, 4-channel, single-ended analog inputs (AN8–AN11) with internal reference |
| Timers | Timer X/Z (8-bit ×2), Timer C (16-bit with input capture/output compare) |
Pinout & Package
Package: 20-pin plastic molded LSSOP (PLSP0020JB-A), 0.65 mm pitch, surface-mount compatible with standard reflow profiles.
| 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 |
| P1_4 / TXD0 | UART transmit output | Drives serial data out with TTL-level logic; requires external pull-up for open-drain compatibility |
| P1_5 / RXD0 / CNTR01 / INT11 | UART receive input | Accepts serial data input; also serves as timer input or external interrupt source |
| P3_3 / TCIN / INT3 / SSI / CMP1_0 | Timer C input | Edge-triggered input for Timer C capture function; shares pin with SSU data I/O |
| XIN / P4_6 | Main clock oscillator input | Accepts external crystal (1–20 MHz) or ceramic resonator; internal feedback resistor enabled |
| RESET | Active-low reset input | Asynchronous reset assertion halts CPU and initializes SFRs; debounced externally recommended |
Key Features
| Feature | Design Value |
|---|---|
| On-chip oscillators | High- and low-speed RC oscillators with programmable frequency trim - eliminates external crystal for cost-sensitive timing |
| LED drive ports | P1_0–P1_3 support direct LED sink up to 20 mA - reduces BOM count in indicator-driven appliances |
| Interrupt priority | 7-level nested priority with software-selectable IPL - enables deterministic response to mixed-signal events |
| Low-power modes | Wait mode (35 µA) and stop mode (0.7 µA) - extends battery life in portable sensor nodes |
| Voltage detection | Integrated voltage monitor (VW1C/VW2C) with reset and interrupt options - prevents erratic operation during brownout |
Applications
| Home Appliance Motor Control | Office Equipment Sensor Interface |
|---|---|
|
Use Scenario: Speed-regulated DC fan control in air purifiers using PWM-driven MOSFET gate drivers. IC Role / Device Role / Timing Role: Primary system controller executing closed-loop PID algorithm, generating 16-bit PWM via Timer C output compare, and sampling current sense ADC. Use Value: Integrated 10-bit ADC and Timer C with capture/compare eliminate external signal conditioning ICs and reduce PCB area by 25%. |
Use Scenario: Paper jam detection and toner level monitoring in laser printers using photointerrupters and resistive sensors. IC Role / Device Role / Timing Role: Sensor hub aggregating analog (AN8–AN11) and digital (KI0–KI3) inputs, communicating status via UART to main SoC. Use Value: Key input interrupt capability enables immediate wake-from-stop on paper feed event, cutting average system power by 40%. |
| Security System Keypad | Housing Equipment Thermostat |
|
Use Scenario: 4×4 matrix keypad scanning with debounce and tamper detection in door access panels. IC Role / Device Role / Timing Role: Dedicated key input interrupt handler (KI0–KI3) with configurable filter (INT0F register) and low-power wait-mode polling. Use Value: Hardware key scan acceleration reduces firmware overhead by 60%, freeing CPU cycles for encryption routines. |
Use Scenario: Ambient temperature and humidity sensing with display backlight control in wall-mounted HVAC thermostats. IC Role / Device Role / Timing Role: Dual-role controller managing 10-bit ADC conversions, driving LED segments via P1_0–P1_3, and maintaining RTC via Timer Z. Use Value: On-chip LED drive ports directly sink common-cathode displays, removing 4 external transistors and associated passives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21142DSP#U0 | Same core, flash, RAM, and peripherals; −40°C to +85°C extended temp range | Required for outdoor housing equipment or uncontrolled-ambient industrial enclosures | Select when ambient operating temperature exceeds +85°C or drops below −20°C |
| R5F21152SP#U0 | Adds 2 KB data flash (1 KB ×2 blocks); identical package, pinout, and instruction set | Enables field firmware updates and parameter storage without external EEPROM | Choose when nonvolatile user data logging or bootloader functionality is required |
Compared with R5F21142SP#U0, the R5F21142DSP#U0 extends thermal reliability for harsh environments, while the R5F21152SP#U0 adds data flash for configuration persistence-both retain full software and hardware compatibility except for temperature rating and flash partitioning.
Availability
R5F21142SP#U0 is available at Aetrix Electronics and suitable for home appliance motor control, office equipment sensor interface, and housing equipment thermostat designs requiring stable component supply and long-term production continuity.
Supply support for R5F21142SP#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, formed in 2010 from the merger of NEC Electronics and Renesas Technology, is a global semiconductor leader focused on microcontrollers, analog, and power solutions.
The R8C/14 Group-including R5F21142SP#U0-is designed for cost-sensitive, low-power embedded control in consumer electronics and general industrial equipment, emphasizing integration, code efficiency, and ease of migration within the R8C family.
FAQ
What is the maximum operating frequency of the R5F21142SP#U0?
The R5F21142SP#U0 achieves a minimum instruction execution time of 50 ns when operated with a 20 MHz external crystal (XIN) and supply voltage between 3.0 V and 5.5 V. At 10 MHz, minimum execution time is 100 ns under 2.7–5.5 V conditions. The on-chip high-speed oscillator supports trimmed frequencies up to 20 MHz without external components.
Does the R5F21142SP#U0 include data flash memory?
No, the R5F21142SP#U0 belongs to the R8C/14 Group and contains only 8 KB of flash program memory and 512 bytes of RAM. It does not integrate data flash. Data flash (1 KB ×2 blocks) is exclusive to the R8C/15 Group, such as the R5F21152SP#U0.
What package type is used for the R5F21142SP#U0?
The R5F21142SP#U0 is packaged in a 20-pin plastic molded LSSOP (PLSP0020JB-A), measuring 7.6 mm × 4.4 mm with 0.65 mm lead pitch. This fine-pitch surface-mount package supports automated assembly and meets JEDEC MS-013 standards.
Can the R5F21142SP#U0 operate from a 3.3 V supply?
Yes, the R5F21142SP#U0 operates across 2.7 V to 5.5 V. At 3.3 V, it supports up to 10 MHz operation (100 ns min. instruction time) and draws typical current of 5 mA at 10 MHz - making it suitable for 3.3 V system designs with moderate performance requirements.
How many analog input channels does the R5F21142SP#U0 support?
The R5F21142SP#U0 integrates a single 10-bit successive-approximation ADC with four dedicated analog input pins: AN8, AN9, AN10, and AN11. These map to P1_0, P1_1, P1_2, and P1_3 respectively and share functionality with key input and comparator outputs.
R5F21142SP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 20-LSSOP (0.173", 4.40mm Width)
- Series:
- R8C/1x/14
- 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:
- 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#U0 FAQ
1.How can I place an order for R5F21142SP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21142SP#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 R5F21142SP#U0 reliable?
The price and inventory of R5F21142SP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21142SP#U0 is usually 5 days.
3.What payment methods are accepted for R5F21142SP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21142SP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21142SP#U0?
R5F21142SP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21142SP#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 R5F21142SP#U0?
For technical support, including R5F21142SP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21142SP#U0 requirements.
6.How does Aetrix verify that R5F21142SP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F21142SP#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 R5F21142SP#U0 meets industry standards.
7.What is the process for return or replacement of R5F21142SP#U0?
All R5F21142SP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21142SP#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 R5F21142SP#U0 part is unused and in its original packaging.
Return procedure for R5F21142SP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R5F21142SP#U0 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…
