HD64F3687GFPV - H8/300H 16-bit MCU, 56KB Flash, 20MHz | Renesas
MPN: HD64F3687GFPV ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $16.36 | $16.36 |
| 10 | $14.2 | $142.00 |
| 100 | $11.5 | $1,150.00 |
| 500 | $9.75 | $4,875.00 |
| 1,000 | $8.4 | $8,400.00 |
HD64F3687GFPV Overview
What is an H8/300H microcontroller? The H8/300H is Renesas' enhanced 16-bit CISC CPU family, upward-object-code-compatible with the original H8/300 while adding a wider 16-bit register file and richer addressing modes. Tiny-Series derivatives such as the H8/3687 Group position this MCU in the hierarchy: H8 family -> H8/300 CPU -> H8/300H Tiny -> H8/3687 Group, used as mainstream microcontrollers -> embedded systems -> semiconductor ICs. The Flash variant (-F suffix) integrates user-programmable Flash memory suitable for prototyping and field-upgradable production firmware.
Key features include on-chip Flash program memory, RAM, multiple timers (16-bit and 8-bit), a watchdog timer, and serial interfaces including SCI (asynchronous/synchronous) and I2C bus. The H8/300H core executes most instructions in 2 to 4 states at 20 MHz, achieving roughly 5 to 10 MIPS sustained throughput. The 64-LQFP package exposes a wide parallel I/O bus and dedicated peripheral pins, enabling direct LED/segment-LCD driving, motor control PWM, and external memory interfacing when required.
Typical applications include white-goods motor control (washing machines, air conditioners), consumer appliance key-scan user interfaces, industrial sensor signal conditioning, and small home appliances requiring deterministic real-time control. The integrated timers and SCI/I2C allow direct connection to sensors, inverters, and operator panels without external glue logic.
When designing with this device, follow the H8/3687 Group hardware manual for unused-pin handling (tie all unused CMOS inputs to VCC or GND to prevent pass-through current). Designers migrating from earlier H8/300 parts benefit from object-level upward compatibility for firmware reuse.
Drop-in alternatives for HD64F3687GFPV — 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 HD64F3687GFPV (same form factor and footprint) — differing in Communication Interfaces, Core, Core Architecture, Operating Temperature, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
HD64F3687GHV
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
HD64F3687FHV
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
HD64F3687FPV
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
DF2138AFA20V
✅ Drop-In✓ In Stock
$12.4 / Unit
View Datasheet →CY91F526KSDPMC-GSE2
✅ Drop-In✓ In Stock
$12.3 / Unit
View Datasheet →HD64F3687GFPV Maximum Ratings & Electrical Characteristics
| Core | H8/300H (16-bit CISC) |
| Series | H8/300H Tiny Series, H8/3687 Group |
| Program Memory | 56 KB Flash |
| Maximum Clock Speed | 20 MHz |
| Supply Voltage | 4.0 V to 5.5 V |
| I/O Pins | 53 |
| Timers | 16-bit timer, 8-bit timer, watchdog timer |
| Serial Interfaces | SCI (UART/synchronous), I2C bus |
| Package | 64-LQFP (10x10 mm, 0.5 mm pitch) |
| Mounting Type | Surface Mount |
| ROM Type | Flash |
| Life Cycle Stage | Active |
| Code Compatibility | Object-level upward compatible with H8/300 CPU |
HD64F3687GFPV Pin Configuration
| Pin 1 | VCC — Power supply (4.0-5.5V) |
| Pin 2 | MD0 — Mode select 0 |
| Pin 3 | MD1 — Mode select 1 |
| Pin 4 | MD2 — Mode select 2 |
| Pin 5 | RES — Reset input (active low) |
| Pin 6 | XTAL — Crystal oscillator input |
| Pin 7 | EXTAL — External clock / crystal oscillator output |
| Pin 8 | OSC1 — Sub-clock oscillator pin 1 |
| Pin 9 | OSC2 — Sub-clock oscillator pin 2 |
| Pin 10 | VSS — Ground |
| Pin 11 | P10 — Port 1 bit 0 (I/O) |
| Pin 12 | P11 — Port 1 bit 1 (I/O) |
| Pin 13 | P12 — Port 1 bit 2 (I/O) |
| Pin 14 | P13 — Port 1 bit 3 (I/O) |
| Pin 15 | P14 — Port 1 bit 4 (I/O) |
| Pin 16 | P15 — Port 1 bit 5 (I/O) |
| Pin 17 | P16 — Port 1 bit 6 (I/O) |
| Pin 18 | P17 — Port 1 bit 7 (I/O) |
| Pin 19 | P20 — Port 2 bit 0 (I/O) |
| Pin 20 | P21 — Port 2 bit 1 (I/O) |
| Pin 21 | P22 — Port 2 bit 2 (I/O) |
| Pin 22 | P23 — Port 2 bit 3 (I/O) |
| Pin 23 | P24 — Port 2 bit 4 (I/O) |
| Pin 24 | P25 — Port 2 bit 5 (I/O) |
| Pin 25 | P26 — Port 2 bit 6 (I/O) |
| Pin 26 | P27 — Port 2 bit 7 (I/O) |
| Pin 27 | P30 — Port 3 bit 0 (I/O) |
| Pin 28 | P31 — Port 3 bit 1 (I/O) |
| Pin 29 | P32 — Port 3 bit 2 (I/O) |
| Pin 30 | P33 — Port 3 bit 3 (I/O) |
| Pin 31 | P34 — Port 3 bit 4 (I/O) |
| Pin 32 | P35 — Port 3 bit 5 (I/O) |
| Pin 33 | P36 — Port 3 bit 6 (I/O) |
| Pin 34 | P37 — Port 3 bit 7 (I/O) |
| Pin 35 | P40 — Port 4 bit 0 (I/O) |
| Pin 36 | P41 — Port 4 bit 1 (I/O) |
| Pin 37 | P42 — Port 4 bit 2 (I/O) |
| Pin 38 | P43 — Port 4 bit 3 (I/O) |
| Pin 39 | P44 — Port 4 bit 4 (I/O) |
| Pin 40 | P45 — Port 4 bit 5 (I/O) |
| Pin 41 | P46 — Port 4 bit 6 (I/O) |
| Pin 42 | P47 — Port 4 bit 7 (I/O) |
| Pin 43 | P50 — Port 5 bit 0 (I/O) |
| Pin 44 | P51 — Port 5 bit 1 (I/O) |
| Pin 45 | P52 — Port 5 bit 2 (I/O) |
| Pin 46 | P53 — Port 5 bit 3 (I/O) |
| Pin 47 | P54 — Port 5 bit 4 (I/O) |
| Pin 48 | P55 — Port 5 bit 5 (I/O) |
| Pin 49 | P56 — Port 5 bit 6 (I/O) |
| Pin 50 | P57 — Port 5 bit 7 (I/O) |
| Pin 51 | P60 — Port 6 bit 0 (I/O) |
| Pin 52 | P61 — Port 6 bit 1 (I/O) |
| Pin 53 | P62 — Port 6 bit 2 (I/O) |
| Pin 54 | P63 — Port 6 bit 3 (I/O) |
| Pin 55 | P64 — Port 6 bit 4 (I/O) |
| Pin 56 | P65 — Port 6 bit 5 (I/O) |
| Pin 57 | IRQ0 — External interrupt request 0 |
| Pin 58 | IRQ1 — External interrupt request 1 |
| Pin 59 | IRQ2 — External interrupt request 2 |
| Pin 60 | TxD0 — SCI0 transmit data |
| Pin 61 | RxD0 — SCI0 receive data |
| Pin 62 | SCL — I2C clock |
| Pin 63 | SDA — I2C data |
| Pin 64 | AVCC — Analog supply (tie to VCC) |
Typical Applications
HD64F3687GFPV is suitable for 6 applications: White-Goods Motor Control, Consumer Appliance User Panels, Industrial Sensor Signal Conditioning, Small Home Appliance Control, HVAC Climate Control Units, Office Equipment Embedded Control.
White-Goods Motor Control
The HD64F3687GFPV drives single-phase induction and brushless-DC motors in washing machines, dishwashers, and air conditioners. Its 16-bit timer generates complementary PWM with dead-time insertion, while the 53 I/O pins route direction-control signals and current-sense inputs. The 5V tolerance and 4-5.5V supply align with rectified-15V/5V-rail white-goods power trees. Compared with 8-bit MCUs, the H8/300H core delivers roughly 5-10 MIPS at 20 MHz, providing deterministic interrupt latency under simultaneous UART, timer, and ADC servicing typical of inverter control firmware.
Recommended
Consumer Appliance User Panels
Front-panel key-scan, LED/segment-LCD driving, and rotary-encoder decoding on microwaves, rice cookers, and refrigerators use the HD64F3687GFPV's 53 I/O pins to multiplex 7-segment displays, scan 4x4 key matrices, and drive status LEDs directly. The H8/300H core handles debounce, menu navigation, and SCI-safe timers concurrently. Its 5V I/O tolerance matches indicator LEDs and optocouplers without level shifters, reducing BOM cost.
Recommended
Industrial Sensor Signal Conditioning
Factory-automation sensor hubs and process-control transmitters use the HD64F3687GFPV to digitize thermocouple, RTD, and 4-20 mA loop inputs while running PID loops at deterministic rates. The 16-bit timer triggers ADC conversions, and the SCI/I2C blocks route processed values to upstream PLCs or HMI panels. The 4.0-5.5V supply accommodates industrial 24V->5V buck rails, and 53 I/O pins support multiple sensor channels per board.
Recommended
Small Home Appliance Control
Coffee machines, robotic vacuums, and air purifiers use the HD64F3687GFPV to coordinate pump drivers, valve solenoids, heater PWM, and UART-linked sensors. The watchdog timer plus hardware interrupt prioritization handles brown-out events in variable-line-voltage environments. I2C links to environmental sensors (temperature, humidity, gas), and SCI provides diagnostic logging to service tools, simplifying field maintenance.
Recommended
HVAC Climate Control Units
Split-system air-conditioner indoor units and thermostat controllers use the HD64F3687GFPV to read NTC temperature sensors, IR remote receivers, and triac-fired fan/damper actuators. The H8/300H core executes fuzzy-control algorithms at 20 MHz with sub-millisecond response. SCI links to outdoor-unit communication, while the 16-bit timer generates zero-crossing-synchronized triac triggers for silent fan-speed control.
Recommended
Office Equipment Embedded Control
Printers, copiers, and label-makers integrate the HD64F3687GFPV to manage stepper-motor paper feeds, thermal printheads, and keypad/display panels. The 53 I/O pins drive parallel printhead strobes and read multiple paper-presence sensors concurrently. SCI provides RS-232/RS-485 service-port connectivity for factory calibration, while I2C links to EEPROM for user-preference storage. The 5V tolerance suits legacy printer power supplies.
Recommended
Recommended Products Summary
Engineering reference data for HD64F3687GFPV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | HD64F3687GHV | HD64F3687FHV | HD64F3687FPV | DF2138AFA20V | CY91F526KSDPMC-GSE2 |
|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Cypress Semiconductor |
| Package | 64-LQFP (10x10 mm, 0.5 mm pitch) | 64-LQFP (same) | 64-LQFP (same) | 64-LQFP (same) | 64-LQFP (same) | 64-LQFP (same) |
| Core Architecture | H8/300H (16-bit) | H8/300H (16-bit) | H8/300H (16-bit) | H8/300H (16-bit) | H8/2138 (16-bit) | F2MC-16LX (16-bit) |
| Serial Interfaces | SCI + I2C | SCI + I2C | SCI + I2C | SCI + I2C | SCI + I2C (verify) | UART + I2C (F2MC-16LX typical) |
Key Differentiators
- H8/3687 Group member with Flash memory in LQFP-64 (vs CY91F526KSDPMC-GSE2)
- Renesas H8/300H object-level upward compatibility (vs DF2138AFA20V)
- 53 I/O pins at 20 MHz in LQFP-64 (vs HD64F3334YFLH16V)
Design Notes
Place a 0.1 uF ceramic decoupling capacitor as close as possible to each VCC/AVCC pin pair, with a bulk 10 uF tantalum or aluminum-polymer capacitor near the package. Route the crystal traces (XTAL/EXTAL) short and symmetric, with a guard ground plane underneath to reduce EMI pickup. Keep the reset (RES) trace short and add a 0.1 uF cap near the pin to filter noise.
Per the H8/3687 Group hardware manual, all unused CMOS input pins MUST be tied to either VCC or GND. Leaving them floating induces intermediate levels that cause internal pass-through current and possible malfunction. Also configure the mode pins (MD0/MD1/MD2) correctly before applying power; boot mode selection must match your application (single-chip vs extended).
Estimated: at 20 MHz CPU clock with all peripherals active, core current draw is typically 30-50 mA; sleep-mode current drops below 10 uA when using software standby. Power-decouple the AVCC pin separately from digital VCC with a ferrite bead if ADC channels are used, preventing digital switching noise from coupling into analog references.
When routing SCI/UART lines to RS-232 or RS-485 transceivers, keep trace lengths under 50 mm and add series-termination resistors (22-33 ohm) close to the MCU pins for signals above 1 Mbps. I2C lines should include 4.7 kohm pull-ups to VCC; for bus lengths over 100 mm use 2.2 kohm pull-ups and reduce clock to 100 kHz standard mode.
Compliance Information
Compliance status not stated in verified web data - confirm with Renesas product environmental compliance documentation. AEC-Q100 not applicable for this consumer/industrial-grade MCU.
