R5F21134FP#U0 - 16-bit 20MHz R8C/13 MCU, 16KB Flash, 32-LQFP | Renesas
Teilenummer: R5F21134FP#U0 ✗ AbgekündigtR5F21134FP#U0 Übersicht
A microcontroller is a single-chip computer that integrates a CPU core, memory, and peripherals such as serial transceivers, timers, and I/O onto one die. The R8C/Tiny family from Renesas sits in the 8/16-bit embedded controller tier of the semiconductor hierarchy: MCU -> embedded controller -> integrated circuit -> semiconductor. Renesas positions the R8C/13 group as a high-efficiency 16-bit architecture aimed at industrial, consumer, and appliance control where code density and peripheral integration matter more than raw clock speed.
Key features of the R5F21134FP#U0 include 20 MHz operation from the R8C/Tiny Series CPU core, 16 KB (16K x 8) Flash program memory in a flash-memory-version device, a 1 MB address space, a UART interface, and a watchdog timer. The high-performance silicon gate CMOS process supports the low-power, high-throughput behaviour expected of this family, and the 3/5 V compatibility range allows the same design to run from 3.3 V or 5 V rails.
Technically, the R8C/13 core balances instruction efficiency with fast register-to-register execution, which reduces cycle counts for typical control loops. Because the part is a non-promotion device, it is intended for customers who already adopted the R8C/13 group; Renesas recommends the RL78/G14 group for new designs, so supply continuity should be confirmed before starting new platform development.
Typical uses include compact motor and relay control, industrial sensor conditioning and monitoring nodes, appliance and instrumentation panels, and UART-connected peripherals such as RS-232 or CAN bridges. The 32-LQFP footprint also makes it attractive for cost-driven designs that need more pins than a small DFN package allows while staying under 8 mm on a side.
When designing with this part, budget decoupling close to VCC and AVCC pins, keep the 32-pin LQFP layout free of thermal vias unless required, and confirm the UART peripheral count and pin multiplexing against the datasheet before committing the board. Supply is limited because the R8C/13 group is a non-promotion family, so securing stock early is advisable.
This page consolidates distributor pricing, verified pin and package data, structured drop-in alternatives, and practical design guidance that is not assembled in the manufacturer datasheet, giving design engineers a single reference for sourcing decisions.
Drop-in-Alternativen für R5F21134FP#U0 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
R5F21135FP#U0
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
R5F21136FP#U0
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
R5F21164FP#U0
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
R5F21165FP#U0
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
R5F21166FP#U0
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
R5F21134FP#U0 Grenzwerte & elektrische Eigenschaften
| Product Type | 16-bit CMOS Microcontroller (MCU) |
| Series / Group | R8C/Tiny Series, R8C/13 Group |
| CPU Core | R8C/Tiny Series 16-bit core |
| Maximale Taktfrequenz | 20 MHz |
| Program Memory (Flash) | 16 KB (16K x 8) |
| Address Space | 1 MB |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Operating Supply Configuration | 3 V / 5 V compatible |
| UART Channels | 2 |
| Watchdog Timer | Yes |
| Output Duty Cycle (ODC) Timing | ODC 12 |
| Betriebstemperaturbereich | -40 C to +85 C |
| Gehäuse | 32-LQFP (7x7 mm), plastic molded |
| Montageart | Surface Mount |
| Process Technology | High-performance silicon gate CMOS |
| Lead-Free / Pb-Free | Pb-Free |
| Lebenszyklusstatus | Non Promotion (R8C/13 group, supported for existing adopters) |
| Unit Price as of 2026-10-29 | Reference distributor pricing, not a firm quote |
R5F21134FP#U0 32-lqfp (7x7 mm), plastic molded Pinbelegungsleitfaden
Pinbelegung für R5F21134FP#U0 (32-lqfp (7x7 mm), plastic molded-Gehäuse). Dieser digitale IC umfasst GPIO, Kommunikationsschnittstellen (UART, SPI, I2C) und Versorgungspins. Alternative Pin-Funktionen und Konfigurationsoptionen entnehmen Sie dem Herstellerdatenblatt. Unverzichtbar für Embedded-System-Design und PCB-Layout.
Keine detaillierten Pinbelegungsdaten verfügbar für R5F21134FP#U0.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
R5F21134FP#U0 ist geeignet für 6 Anwendungs: Compact Industrial Sensor Monitoring Node, Appliance and White-Goods Control Board, UART-to-RS-232 Communication Bridge, CAN Bus Gateway and Motor Control Supervisor, Battery-Powered Portable Instrument, LED and Lighting Control Sequencer.
Compact Industrial Sensor Monitoring Node
The R5F21134FP#U0 suits a distributed sensing node that samples sensors, formats readings, and forwards them over a serial link. Its 16-bit R8C/Tiny Series core at up to 20 MHz gives ample headroom for digital filtering and protocol framing, while the 16 KB of on-chip Flash keeps the firmware self-contained without external memory. The two UART channels let one port run the sensor bus and the other carry the telemetry stream toward a gateway, and the integrated watchdog timer protects a long-running acquisition loop from lockup. The 2.7 V to 5.5 V supply range allows the same board to work from 3.3 V industrial rails or 5 V legacy instrumentation, and the -40 C to +85 C grade covers typical plant environments. The 32-LQFP 7x7 mm footprint keeps the module compact while offering more I/O than a small DFN could provide.
Empfohlen
Appliance and White-Goods Control Board
For appliance control, the R5F21134FP#U0 provides an economical 16-bit processing core with the peripheral set a machine controller needs: UART for service interfaces and diagnostics, a watchdog timer for motor and heater sequences, and 16 KB of Flash for a state machine plus lookup tables. At 20 MHz the R8C/13 core executes multi-step sequencer logic comfortably, and the efficient instruction set reduces cycle counts compared with an 8-bit part when several timers and conditions must be evaluated in a single loop. The 2.7 V to 5.5 V operating range suits appliances that derive logic power from a rectified 5 V rail, while the -40 C to +85 C specification covers kitchen and laundry environments. The 32-pin LQFP is easy for contract manufacturers to assemble and inspect.
Empfohlen
UART-to-RS-232 Communication Bridge
The R5F21134FP#U0 is a natural fit for a protocol-conversion or isolation bridge because the part is UART-centric and built for low-cost embedded supervision. Two UART channels allow one side to talk to a host while the other handles a downstream field device, and the 20 MHz 16-bit core can run framing, escaping, and checksum routines without strain. Because the device is a 3/5 V part with a 2.7 V to 5.5 V input range, it can sit behind a level translator such as the MAX202 family while remaining powered from either a 3.3 V or 5 V logic rail. The watchdog timer resets the module if a frame is malformed or the link stalls, which is valuable in unattended installations. The 32-LQFP 7x7 mm outline keeps the bridge board small enough to mount behind a connector or inside a DIN-rail enclosure.
Empfohlen
CAN Bus Gateway and Motor Control Supervisor
Using the R5F21134FP#U0 as a supervisory node in a small motor or actuator network works well because the device combines a fast 16-bit core, a watchdog timer, and serial channels in a low-cost package. The 20 MHz clock rate leaves room for the message filtering and state-machine logic typically placed between an upper-level controller and a CAN transceiver, while 16 KB of Flash holds the routing tables and fault-handling routines. The integrated watchdog is valuable in motor-adjacent electronics where a hung controller could keep an actuator energized. The wide 2.7 V to 5.5 V supply tolerance simplifies powering the logic section from the same rail as the transceiver. Paired with a 3.3 V-capable CAN transceiver, the 32-LQFP 7x7 mm package keeps the gateway small enough for space-constrained equipment cabinets.
Empfohlen
Battery-Powered Portable Instrument
In a portable instrument or handheld reader, the R5F21134FP#U0 offers efficient 16-bit processing in a small 32-LQFP 7x7 mm package, leaving board area for the battery and display interface. The R8C/Tiny Series core's instruction efficiency means the 20 MHz capability translates into good throughput without requiring a large clock, which helps in battery designs where run time matters. The 2.7 V lower supply limit allows operation from a single Li-ion cell running through a regulator that can fall below 3.3 V, and the 5 V ceiling allows use with older 5 V logic where relevant. The watchdog timer provides recovery from transient brownouts, and the -40 C to +85 C range covers devices operated in vehicles, field gear, or unheated outdoor enclosures. Two UART channels can drive a display or keypad controller alongside an external memory or sensor.
Empfohlen
LED and Lighting Control Sequencer
The R5F21134FP#U0 can drive a lighting or LED signage sequencer where timing accuracy and cost both matter. At 20 MHz with a 16-bit core, the on-chip timers and general-purpose I/O can produce the precise pulse patterns needed for fading and chasing effects, while 16 KB of Flash is sufficient for animation tables and scene programming. The 2.7 V to 5.5 V supply range is convenient in LED systems where the logic rail is often derived at 3.3 V or 5 V from the driver stage, and the -40 C to +85 C rating suits signage installed outdoors or in poorly conditioned rooms. The watchdog timer helps recover the sequencer if noise on long LED wiring causes a fault. Because the part is a 32-pin LQFP, it exposes enough I/O to drive multiple channels without adding an expander in most designs.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für R5F21134FP#U0 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | R5F21135FP#U0 | R5F21136FP#U0 | R5F21164FP#U0 | R5F21165FP#U0 | R5F21166FP#U0 |
|---|---|---|---|---|---|---|
| Package | 32-LQFP (7x7 mm) | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| CPU Core / Word Length | R8C/Tiny Series, 16-bit | R8C/Tiny Series, 16-bit | R8C/Tiny Series, 16-bit | R8C/Tiny Series, 16-bit | R8C/Tiny Series, 16-bit | R8C/Tiny Series, 16-bit |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Program Memory (Flash) | 16 KB (16K x 8) | Larger than 16 KB within R8C/13 group | Larger than 16 KB within R8C/13 group | Substantially larger (64 KB class) | Larger than 16 KB within R8C/13 group | Larger than 16 KB within R8C/13 group |
| Supply Voltage Range | 2.7 V to 5.5 V (3 V / 5 V) | 2.7 V to 5.5 V (3 V / 5 V) | 2.7 V to 5.5 V (3 V / 5 V) | 2.7 V to 5.5 V (3 V / 5 V) | 2.7 V to 5.5 V (3 V / 5 V) | 2.7 V to 5.5 V (3 V / 5 V) |
| UART Channels | 2 | 2 | 2 | 2 | 2 | 2 |
| Watchdog Timer | Yes | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature Range | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Address Space | 1 MB | 1 MB | 1 MB | 1 MB | 1 MB | 1 MB |
| Lifecycle Status | Non Promotion (R8C/13 group) | Non Promotion (R8C/13 group) | Non Promotion (R8C/13 group) | Non Promotion (R8C/13 group) | Non Promotion (R8C/13 group) | Non Promotion (R8C/13 group) |
| Lead-Free / Pb-Free | Yes | Yes | Yes | Yes | Yes | Yes |
Wichtigste Unterscheidungsmerkmale
- Same 32-LQFP 7x7 mm footprint with clear code-growth path (vs. R5F21164FP#U0)
- Lower cost entry point in the same supported family (vs. R5F21135FP#U0)
- Wider supply-voltage tolerance than 3.3 V-only modern MCUs (vs. ATMEGA328P-MUR)
- Integrated watchdog and dual UART reduce external support silicon (vs. ATSAM3N0AA-MU)
Designhinweise
Estimated: with a 5.0 V rail and 3.3 V output at a 20 mA load, the R5F21134FP#U0 dissipates roughly (5.0 V - 3.3 V) x 0.020 A = 0.034 W, which is manageable in a 32-LQFP without a heatsink. The figure is an arithmetic estimate based on the stated supply range and is not a datasheet specification. Place 100 nF ceramic decoupling close to each VCC pin and add a bulk 1 uF or larger capacitor near the supply entry point; keep the ground return path short and use a dedicated ground plane connection to minimize supply droop during 20 MHz switching activity.
The 32-LQFP 7x7 mm package has a 0.8 mm pitch, so route escape traces on a 4-layer board with a dedicated ground plane and short via stubs to keep switching noise off the analog supply pins. Keep the crystal or external clock traces short, guard them with ground, and avoid running them parallel to UART lines. If the board is only two layers, place the bypass capacitors on the same side as the MCU and stitch ground with dense vias under and around the device footprint.
The R8C/13 group is a non-promotion family, and Renesas states that the RL78/G14 group is recommended for new designs. Do not start a fresh platform on the R5F21134FP#U0 without confirming supply status for your volume, because long-tail demand can exceed available stock. On the software side, verify the pad multiplexing of every pin you plan to use in the manufacturer datasheet, since R8C/13 group members share the 32-LQFP footprint but do not populate identical peripherals. Finally, allow margin between the 2.7 V minimum supply and brownout behaviour of any downstream sensors.
The R5F21134FP#U0 exposes two UART channels, and at 20 MHz core clock the UART bit timing derives from the internal timer clock. Keep UART traces away from the clock line and from any switching supply node, and terminate long runs at the receiver when the cable is long or the board-to-board distance exceeds roughly 10 cm. Where the UART drives an RS-232 line, place the level transceiver close to the connector to minimise radiated emissions from long unprotected traces.
Compliance-Informationen
Mouser lists the R5F21134FP#U0 as Pb-Free. The verified distributor and manufacturer data does not state RoHS, REACH, halogen-free, or conflict-minerals status explicitly, so those fields are recorded as unknown rather than assumed. The device is an industrial-temperature (-40 C to +85 C) MCU and is not AEC-Q100 automotive qualified.
