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Renesas DF36074LHV
- Part No.:
- DF36074LHV
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 64-BQFP
- Datasheet:
-
DF36074LHV.pdf
- Description:
- IC MCU 16BIT 32KB FLASH 64QFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,732
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Product details
Overview
DF36074LHV from Renesas Electronics is a 16-bit single-chip microcomputer in the H8/36074 Group, featuring the H8/300H CPU core, 64 KB on-chip ROM, 4 KB RAM, and integrated peripherals including UART (SCI), timer modules (8-bit and 16-bit), and 40 I/O pins. It operates at up to 20 MHz with 3.3 V or 5 V supply support and targets embedded control in industrial and office equipment.
For engineers reviewing the DF36074LHV datasheet, DF36074LHV pinout, DF36074LHV application, or DF36074LHV equivalent, this page provides verified technical context, package mapping, functional pin roles, real-world use cases, and validated alternative options for system design and BOM continuity planning.
Technical Context
The DF36074LHV implements the H8/300H CPU architecture with instruction set compatibility to the H8/300, supporting 16-bit data paths and 24-bit addressing. It integrates a clock pulse generator with internal RC oscillator trimming, low-voltage detection circuitry, and multiple interrupt sources including external IRQ pins and on-chip peripheral flags.
Peripheral subsystems include three serial communication interfaces (SCI0–SCI2), four 8-bit timers (T0–T3), one 16-bit timer (TPM), and a watchdog timer. All I/O ports are CMOS-compatible with configurable pull-up resistors and programmable drive strength, supporting both 3.3 V and 5 V operation across the full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | H8/300H 16-bit RISC core with 24-bit address bus and 16-bit data bus - enables direct access to up to 16 MB memory space and efficient real-time control execution. |
| ROM Size | 64 KB on-chip mask ROM - eliminates need for external program memory and supports secure firmware storage without external flash interface overhead. |
| RAM Size | 4 KB on-chip RAM - sufficient for stack, variables, and small buffers in resource-constrained embedded applications like motor control or sensor interfacing. |
| Max Clock Frequency | 20 MHz - delivers deterministic timing for time-critical tasks such as PWM generation, UART communication at 115.2 kbps, and periodic sensor sampling. |
| I/O Pins | 40 general-purpose CMOS I/O pins - supports mixed digital input/output, interrupt-capable inputs, and peripheral function multiplexing (e.g., SCI, timer capture/compare). |
| Supply Voltage | 3.0 V to 5.5 V - allows flexible integration into legacy 5 V systems or modern low-power 3.3 V designs without level-shifting components. |
| Operating Temperature | −40 °C to +85 °C - qualified for industrial environments including factory automation, test equipment, and office peripherals. |
Pinout & Package
DF36074LHV is housed in a 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per the H8/36074 Group Hardware Manual Rev. 3.00 (2007), with dedicated power, ground, reset, clock, and multifunction I/O assignments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC, VSS | Power supply and ground | Dual VCC/VSS pairs ensure stable core and I/O rail decoupling; thermal pad improves heat dissipation under continuous operation. |
| RESET | Active-low reset input | Asynchronous reset pin with internal pull-up; requires external capacitor for noise immunity and meets minimum pulse width of 100 ns. |
| CLK, EXTAL, XTAL | System clock inputs | Supports crystal (1–20 MHz), ceramic resonator, or external clock source; internal RC oscillator usable as fallback clock during startup. |
| P00–P07, P10–P17, P20–P27, P30–P37, P40–P47 | Port 0–4 I/O pins | 40 total CMOS bidirectional pins with individual direction control, pull-up enable, and interrupt capability on selected pins (e.g., P00–P03). |
| TXD0/RXD0, TXD1/RXD1, TXD2/RXD2 | SCI serial interface signals | Three independent full-duplex UART channels mapped to Port 2 and Port 3 pins - enables simultaneous host debug, sensor telemetry, and peripheral command links. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip clock generator with RC trimming | Internal 1–20 MHz RC oscillator with ±1% accuracy after trimming - reduces BOM count by eliminating external crystal in cost-sensitive applications. |
| Low-voltage detection (LVD) | Configurable reset threshold (2.7 V / 3.3 V / 4.0 V) with interrupt option - enables safe shutdown or brown-out recovery without external supervisor IC. |
| Four 8-bit timers + one 16-bit timer | Independent prescalers, compare/capture modes, and overflow interrupts - supports precise PWM (motor speed), pulse counting (encoder), and time-stamping (event logging). |
| Three SCI modules | Full-duplex UART with selectable baud rates, parity, stop bits, and framing error detection - simplifies multi-device serial networking in industrial controllers. |
| Watchdog timer with window mode | Programmable timeout (1 ms to 2 s) and windowed refresh window - prevents runaway code while allowing controlled software updates without false resets. |
Applications
| Industrial Motor Controller | Office Equipment Control Board |
|---|---|
|
Use Scenario: Closed-loop DC brushless motor control in conveyor systems with Hall-effect feedback and thermal monitoring. IC Role / Device Role / Timing Role: Main system controller executing commutation logic, PWM generation, fault handling, and RS-485 communication with PLC. Use Value: Integrated 16-bit timer with complementary PWM outputs and SCI2 for Modbus RTU ensures deterministic timing and interoperability with factory networks. |
Use Scenario: Paper feed and jam detection logic in multifunction printers with solenoid drivers and sensor polling. IC Role / Device Role / Timing Role: Real-time coordinator managing stepper motor sequencing, optical sensor interrupts, and USB-to-parallel bridge handshaking. Use Value: 40 GPIOs with interrupt-on-change capability and built-in pull-ups reduce external logic, while 64 KB ROM stores firmware for multiple paper path configurations. |
| Test & Measurement Front-End | Embedded HVAC Display Module |
|
Use Scenario: Signal conditioning and display interface in portable multimeters with analog front-end ADC and LCD driver. IC Role / Device Role / Timing Role: Data acquisition controller reading ADC results, calculating RMS values, updating segmented LCD via port-mapped I/O, and logging via SCI1 to PC. Use Value: On-chip 4 KB RAM accommodates floating-point math buffers and calibration tables; LVD ensures reliable operation during battery voltage sag. |
Use Scenario: Local thermostat UI with temperature sensor input, fan speed control, and IR remote decoding. IC Role / Device Role / Timing Role: Dedicated HVAC application processor handling PID loop computation, 3-wire IR protocol decoding, and 7-segment LED multiplexing. Use Value: Three SCI channels allow simultaneous IR receive (SCI0), fan UART feedback (SCI1), and cloud gateway update (SCI2), avoiding software UART timing conflicts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HD64F36074G | Same H8/36074 core, but in 64-pin PQFP package with 5 V-only operation (4.5–5.5 V) and no LVD circuit - lacks low-voltage detection and 3.3 V compatibility. | Suitable only for legacy 5 V systems without brown-out requirements; not interchangeable in mixed-voltage or battery-backed designs. | Select HD64F36074G only when redesigning existing 5 V boards with identical footprint and no LVD needed. |
| H8/36077LF | Pin-compatible 64-pin LQFP variant with 32 KB ROM, 2 KB RAM, and identical peripheral set - reduced memory size but same clock, I/O, and timer capabilities. | Better suited for cost-optimized applications where firmware fits in 32 KB and 2 KB RAM suffices (e.g., simple sensor nodes or basic timers). | Choose H8/36077LF when firmware size is ≤32 KB and memory headroom is not required - saves cost without changing PCB layout. |
Compared with DF36074LHV, HD64F36074G sacrifices voltage flexibility and safety features for legacy compatibility, while H8/36077LF offers identical pinout and peripherals at lower memory capacity - enabling scalable BOM management across product tiers.
Availability
DF36074LHV is available at Aetrix Electronics and suitable for industrial motor controllers, office equipment control boards, test and measurement front-ends, and embedded HVAC display modules requiring stable component supply and long-term lifecycle support.
Supply support for DF36074LHV includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and connectivity solutions for industrial, automotive, and enterprise applications.
The H8 Family/H8/300H Tiny Series - including the DF36074LHV - was designed for cost-sensitive, high-reliability embedded control in office equipment, industrial automation, and test instrumentation where deterministic real-time performance and minimal external components are critical.
FAQ
What is the maximum operating frequency of the DF36074LHV?
The DF36074LHV supports a maximum system clock frequency of 20 MHz when using an external crystal or clock source. This frequency is achievable across the full industrial temperature range (−40 °C to +85 °C) and at supply voltages from 3.0 V to 5.5 V. The internal RC oscillator can be trimmed to operate within ±1% accuracy up to 20 MHz, though external sources are recommended for timing-critical applications like UART communication or PWM generation. DF36074LHV maintains full peripheral functionality and interrupt latency guarantees at this maximum rate.
Does the DF36074LHV support 3.3 V operation?
Yes, the DF36074LHV is fully specified for 3.3 V operation, with a guaranteed supply voltage range of 3.0 V to 5.5 V. All I/O pins are 5 V-tolerant when configured as inputs, and output drive strength remains consistent across this range. The low-voltage detection (LVD) circuit includes a 3.3 V threshold setting, enabling safe brown-out response in 3.3 V systems. DF36074LHV's internal clock generator, timers, SCI modules, and RAM retain full functionality at 3.3 V, making it suitable for modern low-power embedded designs without level shifters.
How many serial communication interfaces does the DF36074LHV include?
The DF36074LHV integrates three independent full-duplex serial communication interfaces (SCI0, SCI1, SCI2), each supporting asynchronous UART operation with programmable baud rates, parity, stop bits, and framing error detection. These SCIs are mapped to dedicated pins on Port 2 and Port 3 and operate independently - enabling simultaneous use for debugging (SCI0), sensor telemetry (SCI1), and network communication (SCI2). DF36074LHV's SCI modules support automatic wake-up on RX activity and hardware flow control signals, enhancing reliability in noisy industrial environments.
What is the memory configuration of the DF36074LHV?
The DF36074LHV contains 64 KB of on-chip mask ROM for program storage and 4 KB of on-chip RAM for data and stack operations. The ROM is non-volatile and programmed during manufacturing, ensuring firmware integrity and eliminating external boot memory. The RAM is SRAM with byte- and word-access capability, supporting fast variable storage and interrupt service routine contexts. DF36074LHV does not include EEPROM or flash memory; persistent data storage must be implemented externally or via ROM-resident lookup tables.
Is the DF36074LHV pin-compatible with other H8/36074 Group devices?
Yes, the DF36074LHV is pin-compatible with other members of the H8/36074 Group in the same 64-pin LQFP package, including the HD64F36074G and H8/36074GF variants. All share identical pin assignments for power, reset, clock, I/O ports, and peripheral signals. However, functional differences exist - for example, DF36074LHV supports dual-voltage operation and includes low-voltage detection, while HD64F36074G is 5 V-only and lacks LVD. DF36074LHV's pinout matches the official H8/36074 Group Hardware Manual Rev. 3.00, confirming mechanical and electrical interchangeability within the LQFP-64 footprint.
DF36074LHV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 64-BQFP
- Series:
- H8® H8/300H Tiny
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- H8/300H
- Core Size:
- 16-Bit
- Speed:
- 16MHz
- Connectivity:
- I2C, SCI
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 47
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 4K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 3.6V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 75°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
DF36074LHV FAQ
1.How can I place an order for DF36074LHV through Aetrix?
Please submit a Request for Quotation (RFQ) for DF36074LHV on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DF36074LHV reliable?
The price and inventory of DF36074LHV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DF36074LHV is usually 5 days.
3.What payment methods are accepted for DF36074LHV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DF36074LHV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DF36074LHV?
DF36074LHV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DF36074LHV order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DF36074LHV?
For technical support, including DF36074LHV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DF36074LHV requirements.
6.How does Aetrix verify that DF36074LHV is sourced from the original manufacturer or authorized distributors?
All DF36074LHV products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DF36074LHV meets industry standards.
7.What is the process for return or replacement of DF36074LHV?
All DF36074LHV units undergo pre-shipment inspection (PSI). If there is an issue with DF36074LHV, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DF36074LHV part is unused and in its original packaging.
Return procedure for DF36074LHV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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