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Renesas DF2638UF20V
- Part No.:
- DF2638UF20V
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 128-BFQFP
- Datasheet:
-
DF2638UF20V.pdf
- Description:
- IC MCU 16BIT 256KB FLASH 128QFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,385
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Product details
Overview
DF2638UF20V from Renesas Electronics is a 16-bit single-chip microcomputer in the H8S/2638 Group, featuring an on-chip H8S/2600 CPU core, 512 KB mask ROM, 32 KB RAM, 16-bit TPU, SCI, A/D converter, motor control PWM timer, and DTC for high-speed data transfer without CPU intervention. It operates at up to 20 MHz and supports subclock functions including subsleep and watch modes.
For engineers reviewing the DF2638UF20V datasheet, DF2638UF20V pinout, DF2638UF20V application, or DF2638UF20V equivalent, key selection considerations include its U-mask version-specific subclock oscillator support, I²C bus interface absence (W-mask only), FWE pin as NC, and compatibility with H8S/2600 Series development tools and software manual REJ09B0139.
Technical Context
The DF2638UF20V implements the H8S/2600 CPU architecture with 32-bit internal data paths and 16-bit external bus interface. It integrates a programmable pulse generator (PPG), watchdog timer unit (WDT), and serial communication interface (SCI) supporting asynchronous and clock-synchronous modes.
Its peripheral set includes a 12-channel 10-bit A/D converter, motor control PWM timer with complementary output capability, and internal data transfer controller (DTC) enabling autonomous memory-to-peripheral transfers. The U-mask variant enables subactive, subsleep, and watch modes via dedicated OSC1/OSC2 pins configured per section 22A.7.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | H8S/2600 16-bit RISC core with 32-bit internal data path and 16-bit external bus |
| Max Clock Frequency | 20 MHz - determines maximum instruction throughput and real-time response latency |
| ROM Capacity | 512 KB mask ROM - fixed program storage; no field reprogrammability |
| RAM Capacity | 32 KB on-chip RAM - supports stack, variables, and DTC buffer operations |
| A/D Converter | 12-channel 10-bit successive-approximation ADC - enables analog sensor interfacing with 1.2 μs conversion time |
| Peripheral Integration | TPU, PPG, WDT, SCI, PWM, DTC, PC brake controller - reduces external component count in motor and industrial control systems |
| Subclock Support | U-mask version only - enables low-power subsleep and watch modes using external 32.768 kHz crystal |
Pinout & Package
DF2638UF20V is housed in a 128-pin FP (Fine Pitch) plastic QFP package (FP-128B), measuring 14 mm × 20 mm with 0.5 mm lead pitch. Thermal and mechanical design requires adherence to Renesas' recommended PCB layout guidelines, including decoupling capacitor placement near VCL/VSS pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC, VSS | Power supply and ground | Core logic supply (3.3 V or 5 V depending on version); multiple pairs required for noise suppression |
| OSC1, OSC2 | Subclock oscillator inputs | Accept 32.768 kHz crystal for subactive/subsleep/watch modes - U-mask specific functionality |
| FWE | Flash write enable | No-connect (NC) in mask ROM versions; must be left open or tied to VSS |
| RES | Reset input | Active-low asynchronous reset; internal pull-up; requires external RC or supervisor circuit |
| TxD1, RxD1 | SCI channel 1 serial I/O | Asynchronous full-duplex UART interface; supports baud rates up to 1 Mbps at 20 MHz |
| PF0–PF7 | Port F I/O | Configurable general-purpose I/O with alternate functions including mode selection (MD0–MD2) and programmer interface |
Key Features
| Feature | Design Value |
|---|---|
| DTC (Data Transfer Controller) | Enables autonomous memory-to-peripheral transfers without CPU cycles - critical for deterministic real-time motor control loops |
| Motor Control PWM Timer | Generates complementary PWM outputs with dead-time insertion - directly drives 3-phase inverter gate drivers |
| 12-Channel 10-Bit A/D Converter | Simultaneous sampling across multiple channels with hardware-triggered start - supports current/voltage sensing in servo systems |
| Subclock Oscillator Support | U-mask version enables ultra-low-power watch mode with 32.768 kHz crystal - extends battery life in portable instrumentation |
| Programmable Pulse Generator (PPG) | Generates precise timing pulses for encoder interfacing or stepper motor control - eliminates need for external timing ICs |
Applications
| Industrial Motor Control | Automated Test Equipment |
|---|---|
Use Scenario: Closed-loop control of 3-phase BLDC motors in HVAC compressors and factory automation drives. IC Role / Device Role / Timing Role: Main system controller executing FOC (Field-Oriented Control) algorithms, managing PWM generation, current sensing via A/D, and position feedback via SCI/encoder interface. Use Value: Integrated DTC offloads ADC-to-PWM synchronization tasks, reducing jitter to <100 ns and enabling 20 kHz switching frequency stability. | Use Scenario: Modular signal acquisition and stimulus generation in benchtop ATE platforms requiring synchronized analog/digital I/O. IC Role / Device Role / Timing Role: Central timing and data coherency manager coordinating multi-channel 10-bit ADC sampling, digital pattern generation, and GPIB/SCI host communication. Use Value: On-chip 16-bit TPU and PPG provide sub-microsecond trigger alignment across 12 analog inputs and 8 digital outputs - eliminating external timing FPGA logic. |
| Energy Metering Systems | Medical Diagnostic Instruments |
Use Scenario: Polyphase electricity meter with harmonic analysis, tamper detection, and optical/IR communication interfaces. IC Role / Device Role / Timing Role: System-on-chip performing metrology calculations, RTC management via subclock, secure firmware updates over SCI, and LCD driver control. Use Value: U-mask subclock support enables accurate time-of-use billing during mains failure using 32.768 kHz crystal - meeting IEC 62053-21 Class 0.5S timing accuracy. | Use Scenario: Portable ultrasound front-end with beamforming control, analog front-end digitization, and USB host interface. IC Role / Device Role / Timing Role: Real-time waveform processor handling echo signal gating, gain control sequencing, and DMA-managed data buffering to external memory. Use Value: DTC-driven burst transfers from A/D to SRAM at 1.2 MSps reduce CPU load by 75%, allowing ARM-based host to focus on image reconstruction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| H8S/2638F20V | F-mask version with flash memory instead of mask ROM; supports in-system programming; FWE pin functional | Lacks U-mask subclock oscillator support; cannot enter subsleep/watch modes | Select when firmware updates or prototyping flexibility are required over ultra-low-power operation |
| H8S/2639F20V | Same package and pinout; adds D/A converter and enhanced PPG; flash-based; higher ROM density (768 KB) | Includes DAC for analog output generation; not available in U-mask configuration | Choose when analog waveform synthesis or closed-loop calibration signals are needed alongside motor control |
Compared with DF2638UF20V, the H8S/2638F20V trades subclock-enabled ultra-low-power modes for field-programmable flash, while the H8S/2639F20V adds DAC and extended PPG functionality but omits U-mask power modes - making DF2638UF20V uniquely suited for battery-backed, time-critical embedded control where mask ROM reliability and subsleep current (<10 μA) are mandatory.
Availability
DF2638UF20V is available at Aetrix Electronics and suitable for industrial motor control, energy metering, automated test equipment, and portable medical instrumentation requiring stable component supply across long production lifecycles.
Supply support for DF2638UF20V 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.
The H8S/2600 Series was designed for high-reliability embedded control applications demanding deterministic real-time performance, integrated peripherals, and long-term supply stability - particularly in motor drives, factory automation, and measurement instrumentation.
FAQ
What is the operating voltage range for DF2638UF20V?
The DF2638UF20V operates from 3.0 V to 5.5 V, supporting both 3.3 V and 5 V system designs. Its electrical characteristics - including A/D accuracy, timing margins, and I/O drive strength - are fully specified across this range per the H8S/2638 Group Hardware Manual Rev.8.00. DF2638UF20V must use separate decoupling capacitors per power domain as defined in section 22.3.2.
Does DF2638UF20V support CAN bus communication?
No, DF2638UF20V does not integrate a CAN controller. The H8S/2638 Group lacks HCAN modules - those are present only in the H8S/2639 and H8S/2635 Groups per Table 1-4 and section 16.1.3. DF2638UF20V relies on SCI for serial communication; external CAN transceivers may be added via GPIO-controlled SPI or bit-banged protocols, but native CAN is not supported.
What is the purpose of the FWE pin on DF2638UF20V?
The FWE (Flash Write Enable) pin on DF2638UF20V is a no-connect (NC) because DF2638UF20V uses mask ROM, not flash memory. As stated in section 1.3.1 Note 4 of the Hardware Manual, the FWE pin must be left open or tied to VSS. It has no functional role in DF2638UF20V operation and is retained solely for pin compatibility with flash-based variants like DF2638F20V.
Which development tools are compatible with DF2638UF20V?
DF2638UF20V is supported by Renesas' H8S/2600 Series toolchain: the H8S C/C++ Compiler (REJ10J2039), H8S Simulator/Debugger (REJ10B0211), and High-performance Embedded Workshop IDE. Debugging requires an E8 or E10 emulator connected via the standard 14-pin JTAG interface defined in section 21A.5. DF2638UF20V does not support on-chip debug via SWD or other modern interfaces.
How does the U-mask designation affect DF2638UF20V functionality?
"U-mask" identifies DF2638UF20V as a mask ROM variant with enabled subclock oscillator functionality (subactive, subsleep, and watch modes) using OSC1/OSC2 pins - a feature disabled in F- and W-mask versions. Per section 1.3.1 Note 2, only U- and W-mask versions support these low-power modes, but W-mask adds I²C while U-mask does not. DF2638UF20V leverages this for battery-operated applications requiring precise timekeeping at microamp-level currents.
DF2638UF20V Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 128-BFQFP
- Series:
- H8® H8S/2600
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- H8S/2600
- Core Size:
- 16-Bit
- Speed:
- 20MHz
- Connectivity:
- CANbus, SCI, SmartCard
- Peripherals:
- Motor Control PWM, POR, PWM, WDT
- Number of I/O:
- 72
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 16K x 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Data Converters:
- A/D 12x10b; D/A 2x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -20°C ~ 75°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
DF2638UF20V FAQ
1.How can I place an order for DF2638UF20V through Aetrix?
Please submit a Request for Quotation (RFQ) for DF2638UF20V 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 DF2638UF20V reliable?
The price and inventory of DF2638UF20V are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DF2638UF20V is usually 5 days.
3.What payment methods are accepted for DF2638UF20V?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DF2638UF20V transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DF2638UF20V?
DF2638UF20V orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DF2638UF20V 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 DF2638UF20V?
For technical support, including DF2638UF20V datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DF2638UF20V requirements.
6.How does Aetrix verify that DF2638UF20V is sourced from the original manufacturer or authorized distributors?
All DF2638UF20V 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 DF2638UF20V meets industry standards.
7.What is the process for return or replacement of DF2638UF20V?
All DF2638UF20V units undergo pre-shipment inspection (PSI). If there is an issue with DF2638UF20V, 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 DF2638UF20V part is unused and in its original packaging.
Return procedure for DF2638UF20V:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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