R5F107ACGSP - RL78/I1A 32MHz 32KB Flash MCU | Renesas
MPN: R5F107ACGSP ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.42 | $34.20 |
| 100 | $2.95 | $295.00 |
| 500 | $2.55 | $1,275.00 |
| 1,000 | $2.2 | $2,200.00 |
R5F107ACGSP Overview
An RL78 microcontroller (MCU) is a low-power 16-bit CISC architecture from Renesas designed for ultra-low-power embedded applications, particularly in consumer, lighting, and home appliance segments. RL78 parts are widely adopted in the True Low Power Platform family, offering 1.6 V to 5.5 V wide operating voltage, multiple low-power modes (HALT, STOP, SNOOZE), and rich peripheral sets including timers, A/D converters, and communication interfaces. The RL78/I1A sub-family specifically targets LED lighting with high-resolution PWM, 3-channel high-side constant-current drivers, and dithering — features unavailable in the general-purpose RL78/G sub-family. RL78 sits within the broader Renesas low-power MCU hierarchy between the 8-bit RL78 (78K0 legacy) and the higher-end RX family.
Key features of the R5F107ACGSP include 32 MHz max CPU frequency, 32 KB Flash + 2 KB data Flash, 30-LSSOP surface-mount package, on-chip high-side constant-current LED drivers, three PWM timer channels with 8-bit dithering, multiple serial interfaces (CSI/UART/I2C), 10-bit A/D converter, and wide 1.6 V to 5.5 V supply range. The 0.98 ns PWM resolution enables smooth dimming curves that are perceptually continuous to the human eye, eliminating visible flicker or step transitions at low brightness levels.
The R5F107ACGSP's architecture combines a 3-stage pipeline CISC core with hardware multiplier, on-chip debugger, and security features such as Flash lock-bit protection. The integrated high-side constant-current drivers support up to three LED strings directly from the MCU, reducing external component count, BOM cost, and PCB area. Combined with built-in safety features such as supply voltage detector (SVD) and watchdog timer, the device meets typical functional-safety requirements for residential and commercial LED fixtures.
Typical applications include LED ceiling lamps, downlights, and architectural lighting with tunable white or RGGB color mixing; industrial signage and DMX-style stage lighting controllers; smart home lighting hubs with wireless add-on modules; and battery-powered portable LED fixtures where the RL78's low STOP-mode current extends operating time. Choose this part when a compact 30-pin MCU with sub-nanosecond PWM dithering and integrated LED drivers is needed.
Designers should follow the Renesas RL78 hardware design guide and consider the wide operating voltage and integrated LED drivers. Note that the R5F107ACGSP#V0 suffix typically denotes tray packaging while #X0 denotes tape-and-reel; both share identical silicon. This page synthesizes distributor pricing, drop-in package alternatives, and design considerations not consolidated in the manufacturer datasheet.
Drop-in alternatives for R5F107ACGSP — 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 R5F107ACGSP (same form factor and footprint) — differing in Package, Core Architecture, A/D Converter, Communication Interfaces, Data Flash.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
R5F107ACGSP#X0
✅ Drop-In📋 Reference alternative (not in catalog)
R5F107AEGSP
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.45 / Unit
View Datasheet →R5F1007EDNA#U0
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →R5F104BCANA
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.82 / Unit
View Datasheet →R5F104JEAFA#V05G
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.1 / Unit
View Datasheet →R5F107ACGSP Maximum Ratings & Electrical Characteristics
| Series | RL78/I1A |
| Core Size | 16-bit |
| Core Architecture | RL78 CISC |
| Program Memory | 32 KB Flash (32K x 8) |
| Data Flash | 2 KB |
| Maximum CPU Frequency | 32 MHz |
| Supply Voltage | 1.6 V to 5.5 V |
| Package | 30-LSSOP |
| Mounting Type | Surface Mount |
| PWM Resolution | 0.98 ns minimum (with 64 MHz timer + 8-bit dithering) |
| A/D Converter | 10-bit |
| LED Drivers | 3-channel high-side constant-current |
| RoHS Status | Compliant |
R5F107ACGSP Pin Configuration
| Pin 1 | P30/TxD0 — Port 3.0 / UART0 transmit |
| Pin 2 | P31/RxD0 — Port 3.1 / UART0 receive |
| Pin 3 | P40/TOOL0 — Port 4.0 / on-chip debug tool data |
| Pin 4 | RESET — Reset input (active low) |
| Pin 5 | P137/INTP0 — Port 13.7 / external interrupt 0 |
| Pin 6 | X2 — Crystal oscillator 2 |
| Pin 7 | X1 — Crystal oscillator 1 / external clock input |
| Pin 8 | VSS — Ground |
| Pin 9 | P20/ANI0 — Port 2.0 / analog input 0 |
| Pin 10 | P21/ANI1 — Port 2.1 / analog input 1 |
| Pin 11 | P22/ANI2 — Port 2.2 / analog input 2 |
| Pin 12 | P23/ANI3 — Port 2.3 / analog input 3 |
| Pin 13 | P24/ANI4 — Port 2.4 / analog input 4 |
| Pin 14 | P25/ANI5 — Port 2.5 / analog input 5 |
| Pin 15 | VDD — Power supply |
| Pin 16 | P00/LED0 — Port 0.0 / high-side LED driver 0 |
| Pin 17 | P01/LED1 — Port 0.1 / high-side LED driver 1 |
| Pin 18 | P02/LED2 — Port 0.2 / high-side LED driver 2 |
| Pin 19 | P03 — Port 0.3 |
| Pin 20 | P04 — Port 0.4 |
| Pin 21 | P05 — Port 0.5 |
| Pin 22 | P06 — Port 0.6 |
| Pin 23 | P07 — Port 0.7 |
| Pin 24 | P10 — Port 1.0 |
| Pin 25 | P11 — Port 1.1 |
| Pin 26 | P12 — Port 1.2 |
| Pin 27 | P13 — Port 1.3 |
| Pin 28 | P14 — Port 1.4 |
| Pin 29 | P15 — Port 1.5 |
| Pin 30 | P16 — Port 1.6 |
Typical Applications
R5F107ACGSP is suitable for 6 applications: Dimmable LED Ceiling Downlights, Tunable White Architectural Lighting, RGB Color-Mixing LED Fixtures, Smart Home Lighting Hubs, Industrial Signage and Channel Letter Illumination, Portable Battery-Powered LED Task Lights.
Dimmable LED Ceiling Downlights
The R5F107ACGSP fits dimmable LED ceiling downlights because its 0.98 ns PWM resolution (64 MHz timer + 8-bit dithering) delivers perceptually smooth dimming curves down to very low brightness levels without visible flicker. Three integrated high-side constant-current LED drivers directly drive warm-white, cool-white, and amber channels without external MOSFETs, cutting BOM cost and shrinking PCB area. The 1.6 V to 5.5 V supply range accepts common mains-derived 5 V, 12 V, or 24 V regulated rails, simplifying global SKUs. Wide STOP-mode current (typically sub-microamp) supports optional emergency-lighting variants that must meet standby energy regulations.
Recommended
Tunable White Architectural Lighting
The R5F107ACGSP's three high-side constant-current LED drivers are ideal for tunable-white fixtures that mix warm-white and cool-white strings, allowing firmware-defined CCT curves and circadian-rhythm presets. The 10-bit A/D converter reads ambient light sensors or potentiometer inputs for closed-loop brightness control, while CSI/UART/I2C interfaces link to DALI, 0-10 V, or wireless DMX gateways. The 32 KB Flash supports substantial CCT profiles and smooth logarithmic dimming maps without external memory. Designers benefit from a single-IC solution that replaces a discrete MCU plus LED driver pair.
Recommended
RGB Color-Mixing LED Fixtures
RGB color-mixing fixtures use the R5F107ACGSP's three independent high-side LED drivers to set R, G, and B channel currents with high-resolution PWM, producing accurate sRGB or wide-gamut color points after calibration. The 0.98 ns PWM dithering eliminates the stair-stepping visible at low duty cycles, enabling smooth theatrical fades. On-chip 10-bit A/D reads color-mixing feedback from optional photodiodes or temperature sensors for thermal derating. The 32 KB Flash is sufficient for color lookup tables, gamma correction curves, and DMX512 command processing.
Recommended
Smart Home Lighting Hubs
The R5F107ACGSP serves as the local lighting controller inside smart-home hubs, where it drives status-indicator LEDs and orchestrates PWM outputs that coordinate with a wireless main MCU handling Zigbee, Thread, or BLE. CSI/UART/I2C interfaces provide a clean handoff to the wireless co-processor, while the wide 1.6 V to 5.5 V supply range simplifies shared-rail designs. Built-in watchdog and flash lock-bit security features protect against firmware corruption in always-on fixtures. The compact 30-LSSOP package fits inside tight hub enclosures.
Recommended
Industrial Signage and Channel Letter Illumination
Industrial signage and channel-letter luminaires use the R5F107ACGSP to drive individual LED modules with per-letter brightness uniformity across a long chain. The high-side constant-current drivers handle typical 20 mA to 100 mA string currents, while the RL78 core runs animation sequences stored in 32 KB Flash. Wide operating temperature and the robust 30-LSSOP industrial package support outdoor or semi-outdoor installations. The wide supply range supports 24 V industrial rails directly after bulk regulation.
Recommended
Portable Battery-Powered LED Task Lights
Battery-powered portable task lights benefit from the RL78 True Low Power Platform's sub-microamp STOP-mode current, which the R5F107ACGSP leverages to extend run time on a single Li-ion or multi-AA cell. The 1.6 V minimum supply allows direct operation from a single Li-ion cell near end-of-discharge. Three high-side drivers can mix brightness levels and color temperatures, while the 10-bit A/D monitors battery voltage for accurate fuel-gauges. The 30-LSSOP package is compact enough for handheld task-light form factors.
Recommended
Recommended Products Summary
Engineering reference data for R5F107ACGSP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | R5F107ACGSP#X0 | R5F107AEGSP | R5F1007EDNA#U0 | R5F104BCANA | R5F104JEAFA#V05G |
|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | 30-LSSOP | 30-LSSOP (same) | 30-LSSOP (same) | 30-LSSOP equivalent RL78/I1A | 30-LSSOP equivalent RL78 family | 30-LSSOP equivalent RL78 family |
| Series | RL78/I1A | RL78/I1A (same silicon) | RL78/I1A | RL78/I1A | RL78/G14 | RL78/G1A |
| Core | 16-bit RL78 CISC | 16-bit RL78 CISC | 16-bit RL78 CISC | 16-bit RL78 CISC | 16-bit RL78 CISC | 16-bit RL78 CISC |
| Maximum CPU Frequency | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Integrated LED Drivers | 3 high-side constant-current | 3 high-side constant-current | 3 high-side constant-current (likely) | Multiple (RL78/I1A family) | None (RL78/G14 general purpose) | None (RL78/G1A general purpose) |
| PWM Resolution | 0.98 ns (with dithering) | 0.98 ns | 0.98 ns (likely) | 0.98 ns (RL78/I1A family) | Standard timer PWM (no LED dithering) | Standard timer PWM (no LED dithering) |
Key Differentiators
- 0.98 ns PWM resolution with integrated dithering (vs R5F104BCANA)
- Three integrated high-side constant-current LED drivers (vs R5F104JEAFA#V05G)
- 32 KB Flash + 2 KB data Flash for lighting firmware (vs R5F1007EDNA#U0)
Design Notes
Estimated: at VDD = 5 V and CPU running at 32 MHz with all three LED drivers active at 50% duty, the R5F107ACGSP draws approximately 8 mA to 12 mA typical core current plus LED-string current. Place a 10 uF bulk + 0.1 uF ceramic decoupling pair within 5 mm of the VDD pin to suppress switching transients from the high-side LED drivers. Connect VSS through a low-impedance plane and stitch multiple vias around the exposed pad area (if present) to reduce thermal resistance.
Estimated: at 25 °C ambient in a 30-LSSOP package with theta_JA around 80 °C/W (typical JEDEC still-air), driving three LED strings at full duty continuously can raise junction temperature ~10 °C above ambient. In enclosed downlight fixtures, derate LED current or add thermal vias under the package to keep Tj below 85 °C for long-term reliability. Always measure with a thermocouple on a production board to confirm.
Route the high-side LED driver outputs (P00/LED0, P01/LED1, P02/LED2) with short, wide traces directly to the LED string anodes to minimize parasitic inductance that can otherwise create ringing at high di/dt. Keep analog inputs (P20-P25/ANI0-ANI5) routed away from the LED driver outputs to avoid coupling noise into A/D conversions. Provide a solid ground pour under the MCU with vias stitching around the perimeter of the 30-LSSOP land pattern.
Do not omit the X1/X2 crystal loading capacitors even when using the internal high-speed oscillator — the external crystal mode requires proper load capacitance for accurate frequency. When migrating from R5F107ACGSP#V0 to R5F107ACGSP#X0, confirm reel orientation matches pick-and-place programming. For firmware migration to RL78/G general-purpose parts (R5F104BCANA, R5F104JEAFA), the integrated LED driver peripherals are absent and must be replaced by external driver ICs, which adds BOM and PCB area.
Compliance Information
RoHS and lead-free status per Renesas product page; halogen-free status not explicitly stated in distributor data. AEC-Q100 not applicable — this is a general-purpose MCU, not automotive-qualified.
