R5F21193SP#U0 - 16-Bit 20MHz MCU, 12KB Flash | Renesas
MPN: R5F21193SP#U0 ✓ ActiveR5F21193SP#U0 Overview
A microcontroller is a programmable semiconductor that integrates a CPU core, memory, digital I/O, and embedded peripherals on one integrated circuit. In the product hierarchy, the R5F21193SP#U0 belongs to the Renesas R8C/19 group of 16-bit microcontrollers. The R8C core provides a compact embedded-control platform for consumer appliances, office equipment, sensor systems, security equipment, industrial products, and audio equipment.
Key verified features include 12KB of flash memory, 768 x 8 bits of RAM, 13 I/O pins, a 20 MHz speed rating, and internal oscillator support. The 3 V to 5 V operating range allows the device to share power infrastructure with common embedded systems while retaining compatibility with lower-voltage logic designs. The 20-LSSOP package supports conventional surface-mount assembly and offers a narrow PCB footprint compared with larger leaded packages.
The R8C/19 family is designed for compact embedded-control tasks that require deterministic peripheral control without a high-cost external processor. Flash memory retains programmed application code when power is removed, while the 768-byte RAM supports working variables, stack operations, and intermediate data processing. The 13 available I/O pins can be allocated among digital inputs, outputs, serial functions, and external control signals according to the device configuration and peripheral multiplexing requirements.
Typical uses include household appliance control, office equipment, sensor interfaces, security systems, industrial equipment, and audio products. Product teams should verify the exact peripheral allocation, reset behavior, clock configuration, electrical limits, and programming requirements against the Renesas R5F21193SP datasheet before releasing a PCB or production firmware.
The principal design consideration is package and software continuity. Because this is a 20-pin LSSOP MCU, board layouts, assembly tooling, and firmware settings may differ from otherwise similar 16-bit devices. Engineers should use the manufacturer pin assignment and reference design information rather than assuming compatibility based only on flash size or operating voltage.
This page consolidates verified distributor specifications, current purchasing information, package information, and application guidance. It also identifies the absence of manufacturer-confirmed drop-in substitutes rather than presenting merely similar microcontrollers as guaranteed replacements.
Drop-in alternatives for R5F21193SP#U0 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with R5F21193SP#U0 (same form factor and footprint) — differing in CPU Core, Package, Product Type.
R5F21192SP#U0
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
R5F21194SP#U0
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →R5F21195SP#U0
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
R5F21193SP#U0 Maximum Ratings & Electrical Characteristics
| Product Type | 16-bit microcontroller |
| CPU Core | R8C |
| Product Family | R8C/19 |
| Maximum Operating Frequency | 20 MHz |
| Program Memory Size | 12KB (12K x 8) |
| RAM Size | 768 x 8 bits |
| Number of I/O Pins | 13 |
| Supply Voltage Range | 3 V to 5 V |
| Oscillator Type | Internal |
| Package | 20-LSSOP (0.173 in, 4.40 mm width) |
| Package Type | LSSOP |
| Number of Pins | 20 |
| Mounting Type | Surface mount |
| Packaging | Tube |
| Lead-Free Status | Pb-free |
| Core Architecture | CISC |
| Manufacturer Ordering Designation | R5F21193SP#U0 |
R5F21193SP#U0 lssop Pin Configuration Guide
Pin configuration for R5F21193SP#U0 (lssop package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for R5F21193SP#U0.
Refer to the datasheet for full pin configuration.
Typical Applications
R5F21193SP#U0 is suitable for 6 applications: Household Appliance Control, Industrial Sensor Interface, Security and Access Control, Office Equipment Controller, Compact Audio Equipment, General Embedded Control Module.
Household Appliance Control
The R5F21193SP#U0 fits compact household appliance controllers because its verified 16-bit R8C core operates at up to 20 MHz and provides 12KB of flash for operating code. Its 768 bytes of RAM supports control variables, state tracking, and short interrupt-handling routines, while 13 I/O pins address switches, indicators, sensors, and actuators. The 3 V to 5 V supply range also fits common embedded appliance rails. Designers should map each peripheral function and verify operating-temperature requirements against the manufacturer datasheet before production.
Recommended
Industrial Sensor Interface
The R5F21193SP#U0 is suitable for small industrial sensor interfaces where a 20 MHz R8C core can execute acquisition, filtering, threshold, and communication routines. The 12KB of flash accommodates application code, the 768-byte RAM provides working memory, and the 13 I/O pins can connect digital sensors, status LEDs, and interface signals. Its internal oscillator reduces external clock-component requirements. For deployed equipment, confirm industrial temperature limits, input thresholds, and communication peripheral mappings in the Renesas documentation.
Recommended
Security and Access Control
The R5F21193SP#U0 can support compact security and access-control modules that coordinate inputs, lock or alarm outputs, status indicators, and local event logic. Its 12KB flash provides persistent program storage, while the 13 available I/O pins offer enough external connections for sensors, keypads, and relay-driving circuitry. The 20 MHz R8C core provides more processing headroom than required for simple sequencing. Engineers must validate voltage levels, reset behavior, and any required security or environmental qualifications for the finished system.
Recommended
Office Equipment Controller
The R5F21193SP#U0 aligns with office equipment controllers that manage buttons, displays, motors, sensors, and communication routines. Its 12KB of flash stores control logic, the 768-byte RAM supports protocol buffers and working state, and the 20 MHz clock allows responsive peripheral servicing. The 20-LSSOP package can simplify compact board layouts compared with larger leaded packages. For printer, copier, or scanner designs, engineers should confirm that the required UART, timers, and I/O assignments match the exact datasheet pin table.
Recommended
Compact Audio Equipment
The R5F21193SP#U0 can be used in compact audio equipment for control logic, button handling, level selection, display updating, and peripheral coordination. Its 16-bit R8C architecture supports real-time control tasks at up to 20 MHz, while 12KB of flash accommodates application firmware and 768 bytes of RAM handles local state. The 13 I/O pins can support encoders, switches, indicators, and control signals. Analog signal-path design remains separate and should use suitable audio amplifiers or converters.
Recommended
General Embedded Control Module
The R5F21193SP#U0 serves as a general embedded-control solution for compact products needing local logic, digital interfaces, and nonvolatile firmware storage. The verified 12KB flash, 768-byte RAM, 13 I/O pins, and 3 V to 5 V operation provide a defined resource envelope for straightforward controllers. Its internal oscillator can reduce board complexity, while the 20-LSSOP package supports automated surface-mount assembly. Confirm timer, serial, and interrupt requirements before selecting it for timing-sensitive or connectivity-heavy systems.
Recommended
Recommended Products Summary
Engineering reference data for R5F21193SP#U0 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | R5F21192SP#U0 | R5F21194SP#U0 | R5F21195SP#U0 |
|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | 20-LSSOP (0.173 in, 4.40 mm width) | 20-LSSOP (0.173 in, 4.40 mm width) | 20-LSSOP (0.173 in, 4.40 mm width) | 20-LSSOP (0.173 in, 4.40 mm width) |
Key Differentiators
- Exact target-family memory configuration (vs R5F21192SP#U0)
- Verified operating and resource specification (vs R5F21194SP#U0)
- Small established surface-mount footprint (vs R5F21195SP#U0)
Design Notes
Treat the 20-LSSOP footprint as a device-specific layout rather than a generic 20-pin package. Verify every exposed pad, power pin, and programming or debug signal against the Renesas pin table before releasing copper and solder masks. Preserve the manufacturer-recommended decoupling and programming access; incorrect pad or pin assumptions can prevent programming even when the package drawing appears dimensionally compatible.
Design the 3 V to 5 V supply rail so it remains within every absolute maximum and operating limit stated in the datasheet. Add local input and output capacitance using the values and effective-voltage requirements specified by Renesas, because ceramic capacitance can decrease sharply with DC bias. The supplied data confirms the 3 V to 5 V range but does not provide startup timing, absolute maximum ratings, or capacitor recommendations.
Do not equate matching package dimensions with drop-in compatibility. Multiplexed peripheral pins, reset behavior, oscillator options, and firmware interrupt mappings can differ between related R8C devices. Before replacing R5F21193SP#U0, compare the manufacturer pin tables, memory limits, peripheral registers, and startup code, then rebuild and test the target firmware. The same caution applies to cross-brand 16-bit MCUs.
Keep sensitive control and communication paths away from noisy power-regulator stages and rapidly switching nodes. Follow the datasheet’s clock and decoupling layout where an external oscillator is supported, and provide short ground returns for bypass capacitors. The verified device uses an internal oscillator, but the supplied data does not establish whether every operating mode permits external clocking, so avoid adding an oscillator-dependent circuit until the pin and clock specifications are checked.
Compliance Information
The verified Mouser listing identifies the device as Pb-free. RoHS, REACH, AEC-Q100, halogen-free, and conflict-minerals declarations were not included in the supplied data and are therefore recorded as unknown.
