M30281F6HP#U9B - 16-bit M16C/Tiny MCU 48KB Flash 64-LQFP | Renesas
MPN: M30281F6HP#U9B ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.2 | $520.00 |
| 500 | $4.65 | $2,325.00 |
| 1,000 | $4.1 | $4,100.00 |
M30281F6HP#U9B Overview
A microcontroller (MCU) is a single-chip computer containing a processor core, program memory (Flash/ROM), working memory (RAM), and peripheral blocks such as timers, communication controllers, and analog interfaces. 16-bit microcontrollers occupy the middle ground between 8-bit entry-level MCUs and 32-bit ARM Cortex devices, delivering higher code density, native handling of larger data types, and richer peripherals while keeping cost and power modest. The M16C/Tiny series uses the R8C CISC core, which provides a compact 16-bit instruction set with high code density.
Key features include 48 KB flash memory organized as 48K × 8, 4 KB RAM organized as 4K × 8, an internal oscillator, 55 programmable I/O pins, and an operating temperature range of -20 °C to +85 °C. The 64-LQFP (10 × 10 mm) package offers a compact footprint while providing ample I/O for embedded designs. The MCU supports low-power operation modes to extend battery life in portable systems.
The M16C architecture uses a Harvard-style internal bus with separate instruction and data paths, which improves throughput versus single-bus designs at the same clock rate. The integrated flash memory supports in-circuit programming via a serial interface, simplifying firmware updates in production and in the field. Built-in safety features include a watchdog timer, voltage detection circuits, and clock monitors.
Typical applications include automotive body electronics, HVAC control modules, white-goods motor control, sensor interface boards, and small consumer appliances. The wide 3 V to 5 V supply range also supports industrial 5 V backplane systems. The internal oscillator reduces BOM cost by removing external crystals in cost-sensitive designs.
When designing with this MCU, ensure the firmware update procedure leaves the M16C/Tiny/28 vector table in a consistent state during flash writes. Decoupling capacitors must be placed close to all VCC/AVCC pins, and unused I/O pins should be configured as outputs with defined levels to minimize power consumption. Designers should verify the package's thermal performance when driving multiple high-current loads.
This page consolidates verified distributor pricing, same-package alternatives, and practical design notes that go beyond the manufacturer datasheet summary, giving engineers a one-stop reference for selecting and sourcing the M30281F6HP#U9B.
Drop-in alternatives for M30281F6HP#U9B — 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 M30281F6HP#U9B (same form factor and footprint) — differing in Series, RoHS Status, Core Architecture, Operating Temperature, Package / Case.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
M30281F6HP#U5B
✅ Drop-In✓ In Stock
$5.55 / Unit
View Datasheet →M30281F6HP#U3B
✅ Drop-In✓ In Stock
$4.75 / Unit
View Datasheet →M30281F6HP#UFB
✅ Drop-In📋 Reference alternative (not in catalog)
M30281F6HP#U9B Maximum Ratings & Electrical Characteristics
| Core Architecture | M16C/Tiny (R8C CISC, 16-bit) |
| Series | M16C/Tiny/28 |
| Program Memory Size | 48 KB (48K x 8) |
| Program Memory Type | Flash |
| RAM Size | 4 KB (4K x 8) |
| CPU Speed (Max) | 20 MHz |
| Operating Voltage | 3 V to 5 V |
| Number of I/O | 55 |
| Package / Case | 64-LQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Oscillator Type | Internal |
| Packaging | Tray |
| Operating Temperature | -20 °C to +85 °C |
| RoHS Status | Pb-free (compliant) |
M30281F6HP#U9B Pin Configuration
| Pin 1 | VREF — A/D converter reference voltage input |
| Pin 2 | AVSS — Analog ground |
| Pin 3 | P0_0/AN0 — Port 0 bit 0 / Analog input 0 |
| Pin 4 | P0_1/AN1 — Port 0 bit 1 / Analog input 1 |
| Pin 5 | P0_2/AN2 — Port 0 bit 2 / Analog input 2 |
| Pin 6 | P0_3/AN3 — Port 0 bit 3 / Analog input 3 |
| Pin 7 | P0_4/AN4 — Port 0 bit 4 / Analog input 4 |
| Pin 8 | P0_5/AN5 — Port 0 bit 5 / Analog input 5 |
| Pin 9 | P0_6/AN6 — Port 0 bit 6 / Analog input 6 |
| Pin 10 | P0_7/AN7 — Port 0 bit 7 / Analog input 7 |
| Pin 11 | VCC — Digital supply voltage (3-5 V) |
| Pin 12 | P1_0 — Port 1 bit 0 (I/O) |
| Pin 13 | P1_1 — Port 1 bit 1 (I/O) |
| Pin 14 | P1_2 — Port 1 bit 2 (I/O) |
| Pin 15 | P1_3 — Port 1 bit 3 (I/O) |
| Pin 16 | P1_4 — Port 1 bit 4 (I/O) |
| Pin 17 | P1_5 — Port 1 bit 5 (I/O) |
| Pin 18 | P1_6 — Port 1 bit 6 (I/O) |
| Pin 19 | P1_7 — Port 1 bit 7 (I/O) |
| Pin 20 | P3_0 — Port 3 bit 0 (I/O) |
| Pin 21 | P3_1 — Port 3 bit 1 (I/O) |
| Pin 22 | P3_2 — Port 3 bit 2 (I/O) |
| Pin 23 | P3_3 — Port 3 bit 3 (I/O) |
| Pin 24 | P3_4 — Port 3 bit 4 (I/O) |
| Pin 25 | P3_5 — Port 3 bit 5 (I/O) |
| Pin 26 | P3_6 — Port 3 bit 6 (I/O) |
| Pin 27 | P3_7 — Port 3 bit 7 (I/O) |
| Pin 28 | VSS — Digital ground |
| Pin 29 | P4_0 — Port 4 bit 0 (I/O) |
| Pin 30 | P4_1 — Port 4 bit 1 (I/O) |
| Pin 31 | P4_2 — Port 4 bit 2 (I/O) |
| Pin 32 | P4_3 — Port 4 bit 3 (I/O) |
| Pin 33 | P4_4 — Port 4 bit 4 (I/O) |
| Pin 34 | P4_5 — Port 4 bit 5 (I/O) |
| Pin 35 | P4_6 — Port 4 bit 6 (I/O) |
| Pin 36 | P4_7 — Port 4 bit 7 (I/O) |
| Pin 37 | P5_0 — Port 5 bit 0 (I/O) |
| Pin 38 | P5_1 — Port 5 bit 1 (I/O) |
| Pin 39 | P5_2 — Port 5 bit 2 (I/O) |
| Pin 40 | P5_3 — Port 5 bit 3 (I/O) |
| Pin 41 | P6_0 — Port 6 bit 0 (I/O) |
| Pin 42 | P6_1 — Port 6 bit 1 (I/O) |
| Pin 43 | P6_2 — Port 6 bit 2 (I/O) |
| Pin 44 | P6_3 — Port 6 bit 3 (I/O) |
| Pin 45 | P6_4 — Port 6 bit 4 (I/O) |
| Pin 46 | P6_5 — Port 6 bit 5 (I/O) |
| Pin 47 | P6_6 — Port 6 bit 6 (I/O) |
| Pin 48 | P6_7 — Port 6 bit 7 (I/O) |
| Pin 49 | P7_0 — Port 7 bit 0 (I/O) |
| Pin 50 | P7_1 — Port 7 bit 1 (I/O) |
| Pin 51 | P7_2 — Port 7 bit 2 (I/O) |
| Pin 52 | P7_3 — Port 7 bit 3 (I/O) |
| Pin 53 | P7_4 — Port 7 bit 4 (I/O) |
| Pin 54 | P7_5 — Port 7 bit 5 (I/O) |
| Pin 55 | P7_6 — Port 7 bit 6 (I/O) |
| Pin 56 | P7_7 — Port 7 bit 7 (I/O) |
| Pin 57 | MODE — Mode select (test/programming mode entry) |
| Pin 58 | RESET — Reset input (active low) |
| Pin 59 | XIN — External clock input / crystal oscillator input |
| Pin 60 | XOUT — External clock output / crystal oscillator output |
| Pin 61 | VCC — Digital supply voltage (3-5 V) |
| Pin 62 | P8_0 — Port 8 bit 0 (I/O, may be used as data bus) |
| Pin 63 | P8_1 — Port 8 bit 1 (I/O) |
| Pin 64 | P8_2 — Port 8 bit 2 (I/O) |
Typical Applications
M30281F6HP#U9B is suitable for 6 applications: Automotive Body Electronics, White Goods and Appliance Control, Industrial Sensor Interface Boards, Small Motor Control Modules, Portable Consumer Devices, Home Automation and IoT Edge Nodes.
Automotive Body Electronics
The M30281F6HP#U9B suits automotive body-electronics modules such as door/window controllers, seat-position controllers, and HVAC damper drivers where 55 I/O pins drive relays, sensors, and LIN/CAN-side companion ICs. Its 48 KB flash holds application logic plus diagnostics, and the 3-5 V supply tolerance handles 12 V automotive rails pre-regulated down to 5 V. Compared to an 8-bit MCU at the same MHz, the 16-bit R8C core reduces code size and improves interrupt latency, critical for body-control timing.
Recommended
White Goods and Appliance Control
In washing machines, dishwashers, and microwave ovens the M30281F6HP#U9B drives user-interface keypads, displays, motor triac interfaces, and temperature sensors. Its 4 KB RAM supports protocol stacks for simple serial communications, while the 48 KB flash absorbs appliance firmware plus factory calibration data. The internal oscillator removes external crystal cost - a meaningful BOM win in consumer appliances where every cent counts and 1% frequency accuracy is sufficient.
Recommended
Industrial Sensor Interface Boards
The M30281F6HP#U9B functions as a smart front-end for analog and digital sensors on industrial 5 V backplanes, scanning multiple transducers and presenting the data via UART, I2C, or SPI to a host controller. Its integrated A/D converter, timers, and 3-5 V tolerance allow direct connection to legacy 5 V sensors without level shifters. Compared to a 32-bit MCU at this price point, the 16-bit R8C core delivers the deterministic timing required for sampled sensor acquisition loops.
Recommended
Small Motor Control Modules
For BLDC and stepper motor control boards under 50 W the M30281F6HP#U9B generates PWM signals, reads Hall sensors, and implements simple commutation algorithms. Its timers provide flexible PWM channels and capture inputs for rotor-position feedback, while 48 KB flash stores tuning tables. Compared to a Cortex-M0, this MCU trades raw MHz for code density and predictable interrupt latency - often preferable for safety-conscious motor-control firmware.
Recommended
Portable Consumer Devices
Battery-powered handheld products such as remote controls, health monitors, and small toys benefit from the M30281F6HP#U9B's low-power modes, internal oscillator, and 3 V operation. The MCU wakes from sleep on peripheral interrupts, runs a brief task, and returns to sub-microamp standby to extend battery life. Compared to 32-bit parts, the 16-bit R8C core's simpler pipeline reduces active-mode current per MHz, helping meet tight portable power budgets.
Recommended
Home Automation and IoT Edge Nodes
As an edge node in home automation the M30281F6HP#U9B aggregates sensor inputs (temperature, occupancy, contact closures) and transmits aggregated state via UART, SPI, or a sub-GHz transceiver. Its 48 KB flash handles firmware plus a basic MQTT-like message encoder, while the 3-5 V range supports both battery cells and USB-derived 5 V supplies. Compared to a Wi-Fi-enabled Cortex-M MCU, the M30281F6HP#U9B is the lower-cost choice when a host MCU or gateway handles connectivity.
Recommended
Recommended Products Summary
Engineering reference data for M30281F6HP#U9B — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | M30281F6HP#U5B | M30281F6HP#U3B | M30281F6HP#UFB |
|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same |
| Core Architecture | M16C/Tiny R8C 16-bit | M16C/Tiny R8C 16-bit | M16C/Tiny R8C 16-bit | M16C/Tiny R8C 16-bit |
| CPU Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Flash Memory | 48 KB | 48 KB | 48 KB | 48 KB |
| RAM Size | 4 KB | 4 KB | 4 KB | 4 KB |
| Number of I/O | 55 | 55 | 55 | 55 |
| Operating Voltage | 3 V to 5 V | 3 V to 5 V | 3 V to 5 V | 3 V to 5 V |
| Operating Temperature | -20 °C to +85 °C | -20 °C to +85 °C | -20 °C to +85 °C | -20 °C to +85 °C |
Key Differentiators
- Mature 16-bit R8C core with high code density (vs Generic 8-bit 8051-based MCU at similar MHz)
- Wide 3 V to 5 V supply tolerance in a single part (vs 3.3 V-only Cortex-M0 MCUs)
- Multiple suffix-code siblings ensure drop-in substitution (vs Single-ordering-code MCUs from competitors)
Design Notes
Place 0.1 µF ceramic decoupling capacitors within 3 mm of every VCC/AVCC pin and a single 4.7-10 µF bulk capacitor near the package. The M16C/Tiny/28 internal voltage regulator requires stable 3-5 V supplies; noisy rails can cause flash programming failures during in-circuit serial programming sequences. For battery-powered designs, leverage the MCU's low-power stop and wait modes to drop quiescent current into the µA range between sensor acquisitions.
Route the analog signals (AN0-AN7) away from high-frequency digital traces to avoid crosstalk into the A/D converter. If the design uses the internal oscillator, leave the XIN/XOUT pins free of nearby switching signals to prevent injection locking. Provide a solid ground plane beneath the 64-LQFP and stitch vias around the package perimeter to improve EMI immunity and thermal dissipation.
Do not leave unused I/O pins floating - configure them as outputs with defined logic levels or enable the internal pull-ups to minimize standby current. The MODE pin must be pulled to its inactive state during normal operation or the MCU enters test/programming mode. When migrating from mask-ROM variants of the M16C/Tiny/28 to the flash-based F6 version, verify the vector-table layout matches the application's startup expectations before committing firmware.
If the application drives long cables or relay coils, add TVS diodes and series resistors on I/O pins to protect the MCU from ESD and inductive kickback. The 64-LQFP bond-wire inductance can ring when switching fast edges into capacitive loads; a 22-33 Ω series resistor damps the resonance. For UART lines running above 115200 baud, keep the trace length below 50 mm or add a small guard ground to prevent reflections.
Compliance Information
Pb-free per Mouser listing 'Pb-free 64-QFP' snippet. RoHS/REACH compliance inferred from Renesas product family documentation; AEC-Q100 not explicitly listed for this suffix - check automotive-grade suffixes for that requirement.
