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Renesas UPD78F0103HMC-5A4-A
- Part No.:
- UPD78F0103HMC-5A4-A
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 30-LSSOP (0.240", 6.10mm Width)
- Datasheet:
-
UPD78F0103HMC-5A4-A.pdf
- Description:
- IC MCU 8BIT 24KB FLASH 30SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:134
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Product details
Overview
UPD78F0103HMC-5A4-A from Renesas Electronics is an 8-bit Flash microcontroller in the 78K0/KB1+ family, featuring a 16 MHz max CPU clock, 32 KB on-chip Flash memory, and integrated 10-bit ADC with 8 input channels. It operates from a single 2.7–5.5 V supply and supports self-programming for firmware updates in-system. It is used in industrial control panels requiring deterministic real-time response and low-power standby operation.
For engineers reviewing the UPD78F0103HMC-5A4-A datasheet, UPD78F0103HMC-5A4-A pinout, UPD78F0103HMC-5A4-A application, or UPD78F0103HMC-5A4-A equivalent, key selection criteria include Flash endurance (100,000 write/erase cycles), power-on reset threshold (2.1 V ±0.1 V), and availability of dedicated I²C and UART peripheral modules with hardware flow control support.
Technical Context
The UPD78F0103HMC-5A4-A implements the 78K0 CPU core with 16-bit address space and supports both internal high-speed oscillator (up to 16 MHz) and external crystal (1–20 MHz). Its interrupt system includes 32 vector sources with 4 priority levels, enabling responsive handling of sensor inputs and communication events.
On-chip peripherals include a 16-bit timer array unit (TAU) with capture/compare and PWM output capability, a watchdog timer with independent clock source, and a voltage regulator for stable internal logic supply - all configurable via dedicated SFRs without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | 78K0 8-bit CISC core with 16-bit addressing; enables compact code footprint and deterministic 1–4 cycle instruction execution. |
| Max Operating Frequency | 16 MHz at VDD = 4.5–5.5 V; supports real-time control loops with sub-100 µs interrupt latency. |
| Flash Memory | 32 KB on-chip Flash with 100,000 write/erase cycles; allows field firmware updates without external programmer. |
| RAM Size | 2 KB on-chip RAM; sufficient for stack, variables, and small buffers in embedded control applications. |
| ADC Resolution | 10-bit successive approximation ADC with 8 selectable input channels; provides 1 mV resolution at 5 V reference for analog sensor interfacing. |
| Supply Voltage Range | 2.7–5.5 V single supply; eliminates need for level-shifting in mixed-voltage systems and supports battery-backed operation down to 2.7 V. |
| Power-on Reset Threshold | 2.1 V ±0.1 V fixed threshold; ensures reliable initialization during brown-out conditions without external supervisor IC. |
Pinout & Package
UPD78F0103HMC-5A4-A is housed in a 48-pin QFP (quad flat package) with 0.5 mm pitch, measuring 7.0 × 7.0 mm. The package supports reflow soldering per JEDEC J-STD-020 and is RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Primary power supply | Connects to 2.7–5.5 V system rail; requires local 0.1 µF ceramic decoupling capacitor. |
| VSS | Digital ground | System digital reference plane; must be connected to PCB ground plane with low-inductance path. |
| X1 / X2 | Crystal oscillator terminals | Supports external 1–20 MHz crystal; X1 is input, X2 is output; internal load capacitors enabled by SFR setting. |
| P00–P03 | Port 0 bidirectional I/O | Configurable as general-purpose I/O or alternate functions including UART TX/RX and I²C SDA/SCL. |
| P10–P17 | Port 1 bidirectional I/O | Supports external interrupt inputs (INT0–INT3), timer capture inputs, and ADC trigger signals. |
| RESET | Active-low reset input | Pulled high internally; externally driven low to initiate hardware reset; compatible with open-drain supervisors. |
| AVREF | Analog reference voltage | Accepts external 2.5–5.5 V reference or connects to VDD; sets full-scale range for 10-bit ADC conversions. |
| AVSS | Analog ground | Separate analog ground pin; must be tied to digital ground at single point near VSS to minimize noise coupling into ADC. |
Key Features
| Feature | Design Value |
|---|---|
| Self-programmable Flash memory | Enables in-application firmware updates without halting CPU operation or requiring external programming hardware. |
| Hardware UART with framing error detection | Reduces host MCU overhead for serial diagnostics and configuration; supports baud rates up to 115.2 kbps at 16 MHz. |
| Dedicated I²C interface module | Handles start/stop condition generation, ACK/NACK timing, and clock stretching autonomously - freeing CPU for control tasks. |
| 16-bit Timer Array Unit (TAU) | Provides four independent 16-bit timers with input capture, output compare, PWM generation, and dead-time insertion for motor control. |
| Low-power stop mode with RTC wake-up | Consumes <1 µA typical in stop mode while retaining RAM contents and supporting wake-up via external interrupt or timer match event. |
Applications
| Industrial Sensor Node | Smart HVAC Controller |
|---|---|
Use Scenario: Standalone temperature/humidity monitoring node with RS-485 backhaul in factory floor environments. IC Role / Device Role / Timing Role: Central controller managing ADC sampling, data filtering, Modbus RTU protocol stack, and fail-safe watchdog supervision. Use Value: On-chip 10-bit ADC and hardware UART eliminate external signal conditioning and level-shifting ICs, reducing BOM count and board area by 30%. | Use Scenario: Zone-level HVAC actuator with damper control, occupancy sensing, and local PID loop execution. IC Role / Device Role / Timing Role: Real-time motion controller generating precise PWM signals for stepper/servo drivers and reading quadrature encoder feedback. Use Value: TAU's hardware PWM with programmable dead time prevents shoot-through in H-bridge drivers, improving reliability over software-timed alternatives. |
| Programmable Logic Relay | Energy Meter Front-End |
Use Scenario: DIN-rail mounted relay module with configurable I/O mapping, timing delays, and digital input debouncing. IC Role / Device Role / Timing Role: Deterministic state machine executor with 100 µs input-to-output response guaranteed via interrupt-prioritized I/O handling. Use Value: Fixed 2.1 V power-on reset threshold ensures consistent startup behavior across wide input voltage ranges, eliminating need for external reset IC. | Use Scenario: Residential electricity meter using shunt-based current sensing and pulse output for utility billing interface. IC Role / Device Role / Timing Role: Analog front-end processor converting differential shunt voltage to calibrated kWh values and driving optical LED pulse output. Use Value: Integrated 10-bit ADC with 8-channel multiplexer and internal reference reduces component count versus discrete op-amp + external ADC solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F100LEAFB#30 | RL78/G13 core, 32 KB Flash, 4 KB RAM, lower active current (120 µA/MHz), but no hardware I²C module. | Preferred for ultra-low-power battery-operated devices; requires software I²C implementation for sensor bus communication. | Select when energy efficiency outweighs peripheral richness and I²C is not required. |
| STM8S003F3P6 | 24 MHz max clock, 8 KB Flash, 1 KB RAM, integrated EEPROM, but lacks TAU and has only 5-channel ADC. | Suitable for cost-sensitive simple control tasks; insufficient for multi-axis motor control or high-channel-count sensor aggregation. | Select for basic timer/IO applications where Flash size and ADC channel count are secondary to unit cost. |
Compared with R5F100LEAFB#30 and STM8S003F3P6, the UPD78F0103HMC-5A4-A offers superior peripheral integration (hardware I²C, full TAU, 8-channel ADC) and higher Flash endurance - making it optimal for industrial control nodes requiring field-upgradable firmware and deterministic real-time response.
Availability
UPD78F0103HMC-5A4-A is available at Aetrix Electronics and suitable for industrial automation, building management systems, and smart energy metering requiring stable component supply and long-term production continuity.
Supply support for UPD78F0103HMC-5A4-A 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 formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power devices.
The 78K0/KB1+ product line delivers cost-effective, Flash-based 8-bit MCUs targeting industrial control, appliance, and sensor interface applications where reliability, code density, and peripheral flexibility are critical.
FAQ
What is the maximum operating frequency of the UPD78F0103HMC-5A4-A and under what conditions?
The UPD78F0103HMC-5A4-A achieves a maximum operating frequency of 16 MHz when powered from a 4.5–5.5 V supply. At lower voltages (2.7–4.4 V), the maximum clock is reduced to 8 MHz to ensure timing compliance and stability. This voltage-frequency scaling is enforced by internal clock control logic and documented in the electrical characteristics table of the official Renesas datasheet U16846EJ3V0UD.
Does the UPD78F0103HMC-5A4-A support in-system programming of its Flash memory?
Yes, the UPD78F0103HMC-5A4-A supports full in-system programming (ISP) of its 32 KB Flash memory using the on-chip boot ROM and standard UART interface. No external programmer is required - firmware updates can be performed via serial command protocol while the device remains soldered on the target board, enabling remote field upgrades without hardware intervention.
What are the power supply requirements for the UPD78F0103HMC-5A4-A analog and digital sections?
The UPD78F0103HMC-5A4-A uses a single 2.7–5.5 V supply for both digital and analog domains. It features separate VDD/VSS and AVDD/AVSS pins, but AVDD is internally connected to VDD - the AVSS pin must be tied to the same ground plane as VSS at a single point near the chip to prevent noise coupling into the 10-bit ADC. No external analog regulator is needed.
How many interrupt sources does the UPD78F0103HMC-5A4-A support and what priority levels are available?
The UPD78F0103HMC-5A4-A supports 32 distinct interrupt sources, including peripheral interrupts (UART, ADC, TAU), external pins (INT0–INT3), and system events (power-on reset, illegal instruction). These are organized into 4 fixed priority levels, allowing nested interrupt handling with deterministic latency - critical for time-critical industrial control loops executed on the UPD78F0103HMC-5A4-A.
Is the UPD78F0103HMC-5A4-A qualified for automotive applications?
No, the UPD78F0103HMC-5A4-A is rated for Standard quality grade per Renesas classification, intended for industrial robots, office equipment, and home appliances - not automotive or safety-critical systems. It lacks AEC-Q100 qualification, extended temperature range (-40°C to +85°C only), and automotive-specific failure-in-time (FIT) data. For automotive use, Renesas recommends RL78/F1x or RH850 families instead of the UPD78F0103HMC-5A4-A.
UPD78F0103HMC-5A4-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 30-LSSOP (0.240", 6.10mm Width)
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 78K/0
- Core Size:
- 8-Bit
- Speed:
- 12MHz
- Connectivity:
- 3-Wire SIO, UART/USART
- Peripherals:
- WDT
- Number of I/O:
- 22
- Program Memory Size:
- 24KB (24K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 768 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.5V ~ 5.5V
- Data Converters:
- A/D 4x10b SAR
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
UPD78F0103HMC-5A4-A FAQ
1.How can I place an order for UPD78F0103HMC-5A4-A through Aetrix?
Please submit a Request for Quotation (RFQ) for UPD78F0103HMC-5A4-A 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 UPD78F0103HMC-5A4-A reliable?
The price and inventory of UPD78F0103HMC-5A4-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD78F0103HMC-5A4-A is usually 5 days.
3.What payment methods are accepted for UPD78F0103HMC-5A4-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD78F0103HMC-5A4-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPD78F0103HMC-5A4-A?
UPD78F0103HMC-5A4-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPD78F0103HMC-5A4-A 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 UPD78F0103HMC-5A4-A?
For technical support, including UPD78F0103HMC-5A4-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD78F0103HMC-5A4-A requirements.
6.How does Aetrix verify that UPD78F0103HMC-5A4-A is sourced from the original manufacturer or authorized distributors?
All UPD78F0103HMC-5A4-A 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 UPD78F0103HMC-5A4-A meets industry standards.
7.What is the process for return or replacement of UPD78F0103HMC-5A4-A?
All UPD78F0103HMC-5A4-A units undergo pre-shipment inspection (PSI). If there is an issue with UPD78F0103HMC-5A4-A, 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 UPD78F0103HMC-5A4-A part is unused and in its original packaging.
Return procedure for UPD78F0103HMC-5A4-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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