R5F21174SP#U0 - 16-Bit 20MHz MCU, 16KB Flash | Renesas
Référence : R5F21174SP#U0 ✗ Fin de vieR5F21174SP#U0 Présentation
A microcontroller is a programmable semiconductor that integrates a processor core, memory, and peripheral interfaces on one die. The R8C/17 Group belongs to Renesas's R8C/Tiny Series family of 16-bit embedded processors. Its architecture emphasizes instruction efficiency, making it useful for industrial controls, instruments, appliances, and compact automation products where deterministic control, modest memory requirements, and low component count are important. The R5F21174SP#U0 is aimed at systems already based on the R8C/17 platform.
The device combines a 20 MHz R8C/Tiny CPU core with 16 KB of flash memory organized as 16K x 8 and 15 general-purpose I/O ports. The 3.0 V to 5.5 V operating range permits use in both 3.3 V and 5 V equipment. Its 20-pin LSSOP outline measures approximately 4.40 mm by 6.50 mm with a 0.65 mm lead pitch, supporting compact PCB layouts while preserving readily inspectable lead spacing. The manufacturer identifies the silicon implementation as high-performance silicon-gate CMOS.
Renesas classifies this R8C/17 Group as supported for customers that have already adopted these products, while recommending the RL78/G12 Group for new designs. Consequently, R5F21174SP#U0 is primarily a continuation choice for established products rather than a preferred platform for greenfield development. Before extending an existing design, confirm software-tool support, peripheral availability, timing, and lifecycle plans against the current Renesas documentation.
Typical applications include compact industrial controllers, sensor-conditioning systems, laboratory instruments, appliance control boards, data-acquisition modules, and embedded automation products. The small package, 16-bit processing capability, and moderate flash capacity make the MCU practical for single-board products with moderate computation and modest firmware size. A migration to another MCU may require changes to the startup code, peripheral configuration, memory map, and board layout.
When designing around this MCU, reserve every supply pin for adequate decoupling and route high-current outputs carefully. Confirm oscillator, reset, and I/O constraints against the manufacturer datasheet before finalizing the PCB. Because this member is not promoted for new R8C/17 designs, evaluate lifecycle continuity and toolchain availability before committing to a new production program.
This product page combines the manufacturer device characteristics, package information, lifecycle position, and a focused comparison of the closest identified same-package alternatives. It also adds selection guidance for maintaining an existing R8C/17 design while highlighting the need to verify pin, peripheral, and software compatibility before any substitution.
Alternatives de remplacement direct pour R5F21174SP#U0 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
R5F21174DSP#U0
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
R5F211A4DSP#U0
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
R5F211B1XXXSP#U0
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
R5F21174SP#U0 Valeurs maximales et caractéristiques électriques
| Product Type | 16-bit R8C/Tiny Series microcontroller |
| CPU Core | R8C/Tiny Series |
| Fréquence d'horloge maximale | 20 MHz |
| Program Memory Type | Flash |
| Program Memory Capacity | 16 KB (16K x 8) |
| Tension d'alimentation de fonctionnement | 3.0 V to 5.5 V |
| I/O Port Count | 15 ports |
| Package Type | 20-pin plastic molded LSSOP |
| Package Body Dimensions | 4.40 mm x 6.50 mm |
| Package Lead Pitch | 0.65 mm |
| Process Technology | High-performance silicon gate CMOS |
| Instruction Architecture | 16-bit |
| Statut du cycle de vie | Active; R8C/17 Group supported for existing adopters |
| New Design Recommendation | RL78/G12 Group |
| Statut RoHS | Compliant |
| Type de montage | Surface mount |
Guide de configuration des broches du R5F21174SP#U0 0.65 mm
Configuration des broches du R5F21174SP#U0 (boîtier 0.65 mm). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour R5F21174SP#U0.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
R5F21174SP#U0 convient pour 6 applications: Compact Industrial Control Boards, Sensor and Signal Conditioning Modules, Laboratory Instrument Control, Appliance and Equipment Control, Data Acquisition Front Ends, Embedded Automation Products.
Compact Industrial Control Boards
The R5F21174SP#U0 fits compact industrial controllers that coordinate discrete sensors, indicators, relays, and actuators. Its 16-bit R8C/Tiny Series core operates at up to 20 MHz, providing more arithmetic headroom than an 8-bit controller, while the 16 KB flash capacity accommodates a focused control program. The 3.0 V to 5.5 V range supports 3.3 V and 5 V industrial electronics, and 15 I/O ports simplify direct connection to panel inputs and output drivers. For an established R8C/17 platform, the device preserves software investment; for a new product, confirm continuity and qualification before adopting this non-promoted group.
Recommandé
Sensor and Signal Conditioning Modules
The R5F21174SP#U0 is appropriate for measurement modules that combine sensor inputs with digital filtering, calibration, and a serial communications interface. The 16-bit architecture and 20 MHz clock support efficient handling of sampled data and control routines, while 15 I/O ports allow direct connection to sensor switches, status indicators, and a communications transceiver. Its 3.0 V to 5.5 V supply range accommodates mixed legacy and modern logic levels. Because this MCU is intended mainly for existing R8C/17 adopters, engineers should retain it for proven modules and verify peripheral limits, ADC characteristics, pin multiplexing, and grounding in the manufacturer documentation before production release.
Recommandé
Laboratory Instrument Control
The R5F21174SP#U0 can serve as the embedded controller in a laboratory instrument requiring front-panel operation, sequencing, status reporting, and external data communication. Its 16-bit CPU core at 20 MHz provides efficient instruction execution for control and data handling, and the 16 KB flash store is appropriate for a narrowly scoped instrument firmware. The 15 available I/O ports support buttons, displays, relays, and communication lines, while the compact 20-LSSOP outline helps minimize board area. Existing laboratory platforms based on R8C/17 can benefit from continuity; new instruments should evaluate the manufacturer-recommended RL78/G12 Group because peripheral availability, tooling, and lifecycle support may be better suited to a new development.
Recommandé
Appliance and Equipment Control
The R5F21174SP#U0 is suitable for established appliance or equipment-control products that need a compact processor, moderate flash memory, and direct control of multiple external loads. A 20 MHz R8C/Tiny Series core can manage operating sequences, user inputs, sensor states, and actuator outputs, while 16 KB flash constrains the application to a focused embedded-control workload. Its 3.0 V to 5.5 V operating range supports both common logic domains, and the 20-pin LSSOP package reduces board footprint. For production continuity, validate the exact suffix, pin functions, peripheral set, and firmware configuration against the current datasheet rather than assuming that another 20-LSSOP member is interchangeable.
Recommandé
Data Acquisition Front Ends
The R5F21174SP#U0 can coordinate a compact data-acquisition front end by reading external converters, applying configuration commands, timestamping samples, and forwarding results over a serial interface. Its 16-bit R8C/Tiny Series processor at 20 MHz handles the control and data-movement tasks of a dedicated front-end MCU, while 15 I/O ports accommodate converter selects, interrupts, status signals, and communications. The 3.0 V to 5.5 V supply range enables integration with mixed-voltage front-end circuitry. Because specific converter timing, serial mode, and peripheral assignments depend on the device configuration, engineers should use the manufacturer pin table and electrical characteristics to establish interface compatibility.
Recommandé
Embedded Automation Products
The R5F21174SP#U0 supports compact embedded automation products that require local decision-making, peripheral control, and a familiar 16-bit architecture. The 20 MHz core is suitable for coordinating finite-state sequences, monitoring digital inputs, and driving outputs, while 16 KB flash provides a practical boundary for moderate control firmware. Its 15 I/O ports and 20-LSSOP package support space-constrained board construction, and the 3.0 V to 5.5 V supply range supports integration with 3.3 V sensors and 5 V interface electronics. For a new automation design, evaluate the RL78/G12 recommendation; for a proven R8C/17 platform, validate toolchain continuity and perform a complete pin and peripheral review before retaining this MCU.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour R5F21174SP#U0 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | R5F21174DSP#U0 | R5F211A4DSP#U0 | R5F211B1XXXSP#U0 |
|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | 20-LSSOP | 20-LSSOP | 20-LSSOP | 20-LSSOP |
Principaux différenciateurs
- Direct continuity with the documented R8C/17 platform (vs R5F211A4DSP#U0)
- Clearer configuration identification for an existing design (vs R5F21174DSP#U0)
- Established family support position (vs R5F211B1XXXSP#U0)
Notes de conception
Do not approve a replacement solely because both devices use a 20-LSSOP package and have 16 KB flash. Compare the numbered pin descriptions, reset behavior, oscillator requirements, timer channels, serial interfaces, and alternate-function assignments in the manufacturer datasheets. The R5F211A4DSP#U0 and R5F21174DSP#U0 are strong same-family candidates, but a model-number change can still alter peripheral availability or start-up behavior. Preserve the original MCU whenever any of those assignments differ.
Place the required decoupling capacitors at the MCU supply pins with short, direct return paths to the ground plane. Route oscillator, reset, and high-speed I/O signals away from switching nodes and noisy analog inputs. The 20-LSSOP package has a 0.65 mm pitch, so inspect clearances and assembly capability before committing to the footprint. Use the manufacturer's land-pattern dimensions and pin-1 orientation rather than deriving the footprint from the body dimensions alone.
Design the power tree for the complete 3.0 V to 5.5 V operating range and check each peripheral's mode-specific voltage and timing limits. Confirm the regulator tolerance, startup behavior, and droop at the maximum processing and I/O load. If an I/O must remain compatible with a 5 V peripheral while the MCU operates at 3.3 V, verify the pin's overvoltage tolerance and output characteristics directly from the electrical-characteristics tables before adding protection.
Treat lifecycle positioning as a design input rather than a footnote. Renesas states that the R8C/17 Group is supported for customers that have already adopted these products and recommends the RL78/G12 Group for new designs. For an ongoing product, document the software, toolchain, qualification, and supply assumptions that justify continuation. For a new program, complete a migration assessment covering memory, timing, peripherals, package dimensions, and board redesign before selecting the MCU.
Informations de conformité
The product listing identifies the exact R5F21174SP#U0 as RoHS compliant. No explicit REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification statement was identified for this exact suffix.
