My Inquiry
My Account
Renesas M38503E4FP#U1
- Part No.:
- M38503E4FP#U1
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
M38503E4FP#U1.pdf
- Description:
- MICROCONTROLLER, 8 BIT, 740/3850
- Quantity:
- Payment:
- Shipping:
Inventory:10,718
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
M38503E4FP#U1 from Renesas Electronics is an 8-bit CISC single-chip microcontroller in the 3850 Group (Spec. H), designed for embedded control in industrial and consumer systems. It integrates 16 KB on-chip ROM, 512 B RAM, a 10-bit A/D converter with 8 channels, three 16-bit timers, and UART/SIO serial interfaces. It operates at up to 10 MHz with supply voltage of 4.5–5.5 V and uses a 64-pin QFP package.
For engineers reviewing the M38503E4FP#U1 datasheet, M38503E4FP#U1 pinout, M38503E4FP#U1 application, or M38503E4FP#U1 equivalent, key selection criteria include its mask-ROM-based program storage, integrated analog-to-digital conversion capability, low-power standby modes (stop/wait), and compatibility with legacy 740-family development tools and software libraries.
Technical Context
The M38503E4FP#U1 implements the Renesas 740-family CPU core with Harvard architecture, supporting both single-chip and expanded memory modes. Its clock system accepts external crystal (XIN/XOUT) or ceramic resonator (XCIN/XCOUT) inputs and includes internal clock division options for flexible timing control.
Peripheral integration includes programmable I/O ports with pull-up control, vectored interrupt handling with 16 sources, PWM output generation via timer channels, and flash-memory-compatible programming modes despite being a mask-ROM variant. All peripherals are memory-mapped and controlled via dedicated SFRs accessible in user mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Renesas 740-family 8-bit CISC with 16-bit address bus and 8-bit data bus |
| ROM Size | 16 KB mask-programmed ROM - fixed firmware, no field reprogramming |
| RAM Size | 512 bytes on-chip RAM - used for stack, variables, and temporary data storage |
| A/D Converter | 10-bit resolution, 8-channel multiplexed input - supports sensor interfacing with ±1 LSB INL |
| Timers | Three 16-bit general-purpose timers - usable for capture/compare, PWM, and interval counting |
| Serial Interface | UART + synchronous serial I/O (SIO) - enables host communication and peripheral daisy-chaining |
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard TTL/CMOS logic levels and industrial power rails |
| Max Clock Frequency | 10 MHz - determines instruction throughput (1–4 cycles/instruction) and real-time response limits |
Pinout & Package
Package: 64-pin plastic quad flat package (QFP), 14 mm × 14 mm, 0.8 mm lead pitch, surface-mount. Pin layout conforms to Renesas standard 3850 Group (Spec. H) pin assignment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSS, VCC | Ground and Power Supply | Dual VCC/VSS pairs ensure stable core and I/O rail decoupling |
| XIN / XOUT | Crystal Oscillator Input/Output | Supports fundamental-mode quartz crystals (1–10 MHz) for precise system timing |
| XCIN / XCOUT | Ceramic Resonator Input/Output | Alternative clock source using low-cost 3-terminal ceramic resonators |
| P00–P07 | Port 0 Bidirectional I/O | 8-bit port with individually controllable direction and pull-up enable |
| P10–P17 | Port 1 Bidirectional I/O | 8-bit port supporting interrupt-on-change and alternate functions (e.g., timer I/O) |
| INT0–INT2 | External Interrupt Inputs | Edge-triggered inputs mapped to priority-level interrupts for event-driven wake-up |
| TXD / RXD | UART Serial Transmit/Receive | Asynchronous full-duplex communication at configurable baud rates |
| AD0–AD7 | Analog Input Channels | Shared with Port 2 pins; selected via AD control register for 10-bit A/D conversion |
Key Features
| Feature | Design Value |
|---|---|
| Mask-ROM Program Storage | 16 KB factory-programmed nonvolatile code memory - eliminates external boot ROM and reduces BOM cost |
| Integrated 10-bit A/D Converter | 8-channel, sample-and-hold enabled - enables direct connection to temperature, pressure, or potentiometer sensors |
| Low-Power Standby Modes | Stop mode (CPU halted, peripherals off) and wait mode (CPU halted, selected peripherals active) - extends battery life in portable devices |
| Memory-Mapped Peripheral Control | All registers accessible via standard MOV instructions - simplifies firmware development and debugging |
| Vectorized Interrupt Architecture | 16 interrupt sources with fixed vector addresses - reduces latency and eliminates software polling overhead |
| Hardware Timer Resources | Three independent 16-bit timers with capture/compare and PWM output capability - supports motor control and pulse measurement |
Applications
| Industrial Motor Control | Home Appliance UI Controller |
|---|---|
Use Scenario: Controlling speed and direction of small DC/stepper motors in HVAC blowers or washing machine drum drives. IC Role / Device Role / Timing Role: Main system controller executing closed-loop feedback routines using A/D inputs and PWM outputs. Use Value: On-chip 10-bit A/D and PWM-capable timers eliminate need for external signal conditioning and driver ICs. | Use Scenario: Managing keypad scan, LED display, temperature sensing, and relay actuation in microwave ovens or rice cookers. IC Role / Device Role / Timing Role: Embedded UI and subsystem coordinator with real-time sensor monitoring and timed output control. Use Value: Integrated 8-channel A/D and multiple I/O ports reduce component count and PCB area versus discrete solutions. |
| Factory Automation Sensor Node | Legacy Equipment Retrofit Module |
Use Scenario: Collecting analog sensor data (e.g., current, voltage, thermal) and transmitting over RS-232/485 to PLC or gateway. IC Role / Device Role / Timing Role: Data acquisition and protocol translation engine with UART interface and configurable sampling intervals. Use Value: UART + SIO support enables interoperability with Modbus RTU and custom serial protocols without external transceivers. | Use Scenario: Replacing obsolete microcontrollers in aging test equipment or medical analyzers where firmware is fixed and unchanged. IC Role / Device Role / Timing Role: Drop-in functional replacement preserving existing PCB layout and software binary compatibility. Use Value: Pin-compatible with earlier 3850 Group variants and retains identical memory map and interrupt vector table. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M38503M4FP#U1 | Same 3850 Group (Spec. H) silicon but with 32 KB mask ROM instead of 16 KB | Suitable when larger firmware footprint is required; otherwise identical peripheral set and pinout | Select M38503M4FP#U1 only if application firmware exceeds 16 KB and no external memory expansion is acceptable |
| UPD78F0503GC-GAH-AX | 78K0R/Ix3 8-bit MCU with 64 KB flash, 6 KB RAM, and enhanced peripheral set (CAN, USB, more timers) | Requires firmware porting; supports field updates and advanced connectivity not available in M38503E4FP#U1 | Choose UPD78F0503GC-GAH-AX for new designs needing flash flexibility, CAN bus, or future-proofing beyond mask-ROM constraints |
Compared with M38503E4FP#U1, M38503M4FP#U1 offers double ROM capacity with zero hardware change, while UPD78F0503GC-GAH-AX provides modern flash-based development and expanded interfaces at the cost of software migration effort and higher unit price.
Availability
M38503E4FP#U1 is available at Aetrix Electronics and suitable for industrial motor control, home appliance UI management, and legacy equipment retrofit requiring stable component supply and long-term manufacturing continuity.
Supply support for M38503E4FP#U1 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 SoC solutions for automotive, industrial, and IoT markets.
The 3850 Group (Spec. H) belongs to Renesas' legacy 740-family MCU line, designed for cost-sensitive, high-reliability embedded control applications where fixed-function firmware and long product lifecycles are critical.
FAQ
What is the maximum operating frequency of the M38503E4FP#U1?
The M38503E4FP#U1 supports a maximum system clock frequency of 10 MHz when using an external crystal oscillator connected to XIN/XOUT. This frequency defines the upper limit for instruction execution speed and peripheral timing accuracy. The device also supports lower-frequency operation using ceramic resonators or divided internal clocks, enabling power optimization in battery-powered applications. All timing specifications in the datasheet assume operation within this 10 MHz limit.
Does the M38503E4FP#U1 support in-circuit programming or firmware updates?
No, the M38503E4FP#U1 contains mask-programmed ROM and does not support in-circuit programming or field firmware updates. Its 16 KB program memory is permanently configured during wafer fabrication. For applications requiring reprogrammability, Renesas offers flash-based alternatives such as the 78K0R/Ix3 series. The M38503E4FP#U1 is intended for high-volume, fixed-function deployments where firmware stability and cost efficiency are prioritized over update flexibility.
What are the power supply requirements for reliable operation of the M38503E4FP#U1?
The M38503E4FP#U1 requires a regulated VCC supply between 4.5 V and 5.5 V, with separate VSS ground connections. Decoupling capacitors (typically 0.1 µF ceramic near each VCC/VSS pair) are mandatory to suppress switching noise. Operation outside this range may cause undefined behavior, data corruption, or permanent damage. The device draws approximately 12 mA typical at 10 MHz and 5 V, dropping to <100 µA in stop mode - making it suitable for intermittent-duty embedded systems.
How many analog input channels does the M38503E4FP#U1 support, and what is their resolution?
The M38503E4FP#U1 integrates a 10-bit successive-approximation A/D converter with 8 selectable analog input channels (AD0–AD7), shared with Port 2 pins. Each conversion yields a 10-bit digital result (0–1023) representing the input voltage relative to the selected reference (VREF). The converter supports single-shot and continuous conversion modes, with typical conversion time of 64 µs per channel at 10 MHz system clock - sufficient for slow-varying sensor signals like thermistors or potentiometers.
Is the M38503E4FP#U1 pin-compatible with other members of the 3850 Group?
Yes, the M38503E4FP#U1 is pin-compatible with other 64-pin QFP variants in the 3850 Group (Spec. H), including M38503M4FP#U1 and M38503E8FP#U1. All share identical pin assignments, electrical characteristics, and memory-mapped peripheral layout. Differences are limited to ROM size, RAM size, or minor feature enables - allowing hardware reuse across firmware variants. However, it is not pin-compatible with the older 3850 Group (standard) or unrelated Renesas families like the 78K0.
M38503E4FP#U1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- -
- Series:
- *
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- -
- Core Size:
- -
- Speed:
- -
- Connectivity:
- -
- Peripherals:
- -
- Number of I/O:
- -
- Program Memory Size:
- -
- Program Memory Type:
- -
- EEPROM Size:
- -
- RAM Size:
- -
- Voltage - Supply (Vcc/Vdd):
- -
- Data Converters:
- -
- Oscillator Type:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
M38503E4FP#U1 FAQ
1.How can I place an order for M38503E4FP#U1 through Aetrix?
Please submit a Request for Quotation (RFQ) for M38503E4FP#U1 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 M38503E4FP#U1 reliable?
The price and inventory of M38503E4FP#U1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M38503E4FP#U1 is usually 5 days.
3.What payment methods are accepted for M38503E4FP#U1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M38503E4FP#U1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M38503E4FP#U1?
M38503E4FP#U1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M38503E4FP#U1 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 M38503E4FP#U1?
For technical support, including M38503E4FP#U1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M38503E4FP#U1 requirements.
6.How does Aetrix verify that M38503E4FP#U1 is sourced from the original manufacturer or authorized distributors?
All M38503E4FP#U1 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 M38503E4FP#U1 meets industry standards.
7.What is the process for return or replacement of M38503E4FP#U1?
All M38503E4FP#U1 units undergo pre-shipment inspection (PSI). If there is an issue with M38503E4FP#U1, 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 M38503E4FP#U1 part is unused and in its original packaging.
Return procedure for M38503E4FP#U1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M38503E4FP#U1 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
