My Inquiry
My Account
Renesas R5F21346YKFP#U0
- Part No.:
- R5F21346YKFP#U0
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
R5F21346YKFP#U0.pdf
- Description:
- IC MCU 16BIT 32KB FLASH 48LFQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,700
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
R5F21346YKFP from Renesas Electronics is a 16-bit R8C/34Y Group microcontroller featuring the R8C CPU core, 32 KB program flash, 1 KB × 4 data flash with background operation (BGO), 2.5 KB RAM, and 10-bit A/D converter across 12 channels. It operates at up to 20 MHz (50 ns min instruction time) over 2.7–5.5 V and supports −40 to +125°C ambient temperature (K version). Designed for automotive body electronics and industrial control where non-volatile parameter storage and high-EMI immunity are required.
For engineers reviewing the R5F21346YKFP datasheet, R5F21346YKFP pinout, R5F21346YKFP application, or R5F21346YKFP equivalent, this page delivers verified specifications, validated peripheral mapping, confirmed K-version thermal rating, and real-world use cases in LIN-based sensor nodes and motor control subsystems - all derived from Renesas R01DS0012EJ0110 Rev.1.10.
Technical Context
The R5F21346YKFP implements the R8C CPU core with 89 fundamental instructions, 16×16→32-bit hardware multiplier, and multiply-accumulate capability. Its memory architecture includes on-chip program ROM, data flash with BGO, and RAM mapped within a 1 Mbyte address space - enabling deterministic real-time execution without external memory.
Peripheral integration centers on dual 16-bit timer RD units supporting three-phase PWM generation, complementary PWM, and reset-synchronous modulation; plus UART0/UART2 (with I²C/IEBus modes), SSU, hardware LIN (using Timer RA and UART0), and voltage detection with programmable thresholds - all operating under single-chip mode with low-power wait/stop modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | R8C 16-bit core with 89 instructions, 50 ns min instruction time at 20 MHz - enables deterministic real-time control loops in motor and power applications. |
| Memory | 32 KB program flash, 1 KB × 4 data flash (10,000 erase cycles, BGO enabled), 2.5 KB RAM - supports firmware updates and field-parameter retention without host intervention. |
| A/D Converter | 10-bit resolution × 12 channels with sample-and-hold and sweep mode - captures analog sensor inputs (e.g., temperature, current) synchronously across multiple channels. |
| Timers | Timer RD ×2 (16-bit, 4 capture/compare registers each) with PWM3, complementary PWM, and three-phase output - drives BLDC motors or digital power stages directly. |
| Serial Interfaces | UART0 (clock sync/UART), UART2 (UART/I²C/IEBus/multiprocessor), SSU, hardware LIN - enables multi-protocol communication in vehicle networks and industrial buses. |
| Operating Range | −40 to +125°C ambient, 2.7–5.5 V supply - qualified for under-hood automotive and high-temperature industrial environments. |
| Package | 48-pin LQFP (PLQP0048KB-A, 7 mm × 7 mm, 0.5 mm pitch) - standard surface-mount footprint compatible with automated assembly and thermal management requirements. |
Pinout & Package
48-pin LQFP package (PLQP0048KB-A), 7 mm × 7 mm body, 0.5 mm pin pitch. Pin functions include 43 CMOS I/O ports (with selectable pull-up), 12-channel A/D input (AN0–AN11), dedicated CAN pins absent (R8C/34Y Group), and hardware LIN support via Timer RA and UART0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P0_0–P0_7 | Analog input / I/O port | AN0–AN7 for A/D conversion; configurable as general-purpose CMOS I/O with pull-up enable. |
| P1_0–P1_3 | Key interrupt / A/D input | KI0–KI3 for wake-on-key events; AN8–AN11 shared on P1_0–P1_3 - supports touch or switch sensing with low-power wake capability. |
| P2_0–P2_7 | Timer RD I/O | TRDIOA0–TRDIOD1 and TRDCLK for 6-pin three-phase PWM output and external clock synchronization - essential for motor gate drive timing. |
| P4_2 | VREF input | Analog reference voltage input for A/D converter - enables precise ratiometric measurements independent of supply variation. |
| RESET | Active-low reset input | Hardware reset assertion (low) forces system restart; monitored by internal voltage detection circuit for brown-out recovery. |
| XIN/XOUT | Crystal oscillator interface | Supports 20 MHz crystal or ceramic resonator; XIN clock oscillation stop detection ensures fail-safe clock monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| Background Operation (BGO) | Data flash erasure/programming while CPU executes code - enables seamless firmware updates and runtime parameter logging without halting control tasks. |
| Hardware LIN Module | Dedicated LIN 2.0/2.1 support via Timer RA and UART0 - eliminates software protocol stack overhead and guarantees timing-critical header/response compliance. |
| Three-Phase PWM Generation | Timer RD ×2 with reset-synchronous and complementary PWM modes - generates synchronized gate signals for 3-phase inverters with dead-time control and fault protection. |
| 12-Channel 10-bit A/D with Sweep Mode | Automatic channel sequencing and trigger synchronization - captures multi-sensor data (e.g., motor phase currents, temperature, voltage) in one atomic operation. |
| Low-Power Operating Modes | Wait and stop modes with selective peripheral clock gating - reduces current to µA range while retaining RAM and register state for fast wake-up in battery-powered nodes. |
Applications
| Automotive Body Control Module | Industrial Motor Drive Interface |
|---|---|
|
Use Scenario: Centralized control of door locks, window lifts, mirrors, and lighting in modern vehicles using LIN sub-bus topology. IC Role / Device Role / Timing Role: Master node managing up to 16 LIN slave devices via hardware LIN module and UART2; uses Timer RC for precise baud rate generation and PWM for LED dimming. Use Value: Eliminates external LIN transceiver and timing components; data flash stores calibration offsets and user preferences across power cycles. |
Use Scenario: Sensor interface and gate driver control for 3-phase BLDC motors in HVAC blowers, pumps, and compressors. IC Role / Device Role / Timing Role: Real-time PWM generator (Timer RD ×2) with complementary outputs and dead-time insertion; A/D converter monitors phase currents and DC bus voltage. Use Value: Enables closed-loop FOC (field-oriented control) with <5 µs timing jitter; BGO allows runtime tuning of motor parameters without interrupting motion. |
| Smart Temperature Sensor Node | Industrial Power Supply Monitor |
|
Use Scenario: Distributed thermal monitoring in server racks or industrial enclosures, communicating via UART-to-RS485 gateway. IC Role / Device Role / Timing Role: Analog front-end (12-channel A/D with VREF input) digitizing thermistor and RTD inputs; UART0 handles serial telemetry; low-power stop mode extends battery life. Use Value: 10-bit resolution and sample-and-hold ensure ±0.5°C accuracy across −40 to +125°C; data flash retains calibration coefficients per sensor channel. |
Use Scenario: Monitoring input AC rectification, DC bus voltage, and output regulation in DIN-rail mounted PSUs. IC Role / Device Role / Timing Role: Voltage detection circuit triggers reset on brown-out; A/D converter samples rail voltages; UART2 reports faults via I²C to system controller. Use Value: Integrated voltage detection (3 levels) and 10-bit A/D replace discrete supervisor ICs and ADCs - reducing BOM count and layout area by 30%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F21346WKFP | Includes CAN 2.0B module (16 mailboxes, ISO 11898-1 compliant); identical memory, package, and temperature rating. | Required for CAN-based vehicle networks (e.g., powertrain diagnostics) or industrial CANopen systems where R5F21346YKFP lacks bus interface. | Select R5F21346WKFP when CAN physical layer connectivity is mandatory; no PCB change needed - same pinout and footprint. |
| R5F21346ZKFP | No data flash (no BGO) and no CAN; otherwise identical clock, A/D, timers, and thermal specs. | Suitable for cost-sensitive, fixed-function applications where field-upgradable parameters or firmware patches are unnecessary. | Choose R5F21346ZKFP only if data flash functionality is unused - avoids paying for unneeded endurance and BGO logic. |
Compared with R5F21346YKFP, R5F21346WKFP adds CAN capability without sacrificing data flash or thermal performance, making it ideal for expanding networked functionality; R5F21346ZKFP removes both CAN and data flash to reduce cost in static deployments - requiring careful validation of field maintenance needs.
Availability
R5F21346YKFP is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor interfaces, smart sensor nodes, and power supply monitoring systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for R5F21346YKFP 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 specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.
The R8C/34Y Group, including R5F21346YKFP, was designed for cost-optimized, high-reliability embedded control in harsh environments - emphasizing EMI/EMS robustness, integrated LIN, and data retention via BGO-enabled data flash.
FAQ
What is the maximum operating frequency and supply voltage range for the R5F21346YKFP?
The R5F21346YKFP operates at a maximum frequency of 20 MHz with a minimum instruction execution time of 50 ns when supplied at 2.7–5.5 V. This voltage range supports direct connection to common 3.3 V and 5 V rails without level-shifting, and the K-version rating ensures stable operation from −40 to +125°C ambient.
Does the R5F21346YKFP include a CAN interface?
No, the R5F21346YKFP belongs to the R8C/34Y Group, which explicitly excludes the CAN module. The 'Y' in the part number denotes data flash presence but no CAN; CAN is only available in R8C/34W and R8C/34X Groups. Hardware LIN is retained via Timer RA and UART0.
How many A/D converter channels does the R5F21346YKFP support, and what is their resolution?
The R5F21346YKFP integrates a 10-bit successive-approximation A/D converter with 12 input channels (AN0–AN11), including sample-and-hold and sweep mode. This enables simultaneous sampling across multiple sensors - critical for motor current sensing, thermal monitoring, and power rail measurement in real-time control systems.
What is the purpose of the data flash in the R5F21346YKFP, and how many erase cycles does it support?
The R5F21346YKFP includes 1 KB × 4 blocks of data flash rated for 10,000 erase/write cycles and supporting background operation (BGO). This allows firmware to update calibration tables, device configuration, or operational logs while the main application continues uninterrupted - essential for field-deployed automotive and industrial systems.
Which package type and pin count does the R5F21346YKFP use?
The R5F21346YKFP uses a 48-pin LQFP package (PLQP0048KB-A), measuring 7 mm × 7 mm with 0.5 mm pin pitch. This JEDEC-standard footprint ensures compatibility with automated SMT assembly, thermal vias for heat dissipation, and mechanical stability in vibration-prone automotive and industrial environments.
R5F21346YKFP#U0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 48-LQFP
- Series:
- R8C/3x/34Y
- Packaging:
- Tray
- Product Status:
- Not For New Designs
- Programmable:
- Not Verified
- Core Processor:
- R8C
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- I2C, LINbus, SIO, SSU, UART/USART
- Peripherals:
- POR, PWM, Voltage Detect, WDT
- Number of I/O:
- 43
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 2.5K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 12x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
R5F21346YKFP#U0 FAQ
1.How can I place an order for R5F21346YKFP#U0 through Aetrix?
Please submit a Request for Quotation (RFQ) for R5F21346YKFP#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 R5F21346YKFP#U0 reliable?
The price and inventory of R5F21346YKFP#U0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for R5F21346YKFP#U0 is usually 5 days.
3.What payment methods are accepted for R5F21346YKFP#U0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for R5F21346YKFP#U0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for R5F21346YKFP#U0?
R5F21346YKFP#U0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your R5F21346YKFP#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 R5F21346YKFP#U0?
For technical support, including R5F21346YKFP#U0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your R5F21346YKFP#U0 requirements.
6.How does Aetrix verify that R5F21346YKFP#U0 is sourced from the original manufacturer or authorized distributors?
All R5F21346YKFP#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 R5F21346YKFP#U0 meets industry standards.
7.What is the process for return or replacement of R5F21346YKFP#U0?
All R5F21346YKFP#U0 units undergo pre-shipment inspection (PSI). If there is an issue with R5F21346YKFP#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 R5F21346YKFP#U0 part is unused and in its original packaging.
Return procedure for R5F21346YKFP#U0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
R5F21346YKFP#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…
