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Renesas UPD78F1805AK8A2-3B4-G
- Part No.:
- UPD78F1805AK8A2-3B4-G
- Manufacturer:
- Renesas
- Category:
- Microcontrollers
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
UPD78F1805AK8A2-3B4-G.pdf
- Description:
- IC MCU 16BIT 32KB FLASH 32WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,945
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Product details
Overview
UPD78F1805AK8A2-3B4-G from Renesas Electronics is a 16-bit single-chip microcontroller in the 78K0R/FB3 family, featuring 64 KB on-chip Flash memory, 4 KB RAM, and integrated peripherals including 10-bit ADC, UART, I²C, and timer modules. It operates at up to 20 MHz, supports 2.7–5.5 V supply, and targets embedded control in industrial sensors and motor drive interfaces.
For engineers reviewing the UPD78F1805AK8A2-3B4-G datasheet, UPD78F1805AK8A2-3B4-G pinout, UPD78F1805AK8A2-3B4-G application, or UPD78F1805AK8A2-3B4-G equivalent, key selection criteria include Flash endurance (100k write/erase cycles), operating temperature range (−40°C to +85°C), 32-pin LQFP package compatibility, and support for on-chip debug via QB-MINI2 emulator.
Technical Context
The UPD78F1805AK8A2-3B4-G implements the 78K0R CPU core with 16-bit architecture, Harvard memory organization, and instruction set compatible with earlier 78K0 series. It integrates a 10-bit ADC with 8 input channels, two 16-bit timer/counters with PWM output capability, and dual serial interfaces (UART and I²C) for sensor and actuator communication.
Power management includes HALT and STOP low-power modes with wake-up via external interrupt or timer event. The device uses Renesas' SuperFlash® technology for Flash memory, enabling single-cycle read access and sector erase functionality without external high-voltage programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit 78K0R CPU with 16-MHz max operation (20 MHz with PLL) |
| Flash Memory | 64 KB on-chip Flash with 100,000 write/erase cycles and 10-year data retention |
| RAM Size | 4 KB on-chip RAM, accessible in single-cycle read/write |
| ADC Resolution | 10-bit successive approximation ADC with 8-channel analog input multiplexer |
| Supply Voltage | 2.7 V to 5.5 V - supports direct interface with 3.3 V and 5 V logic systems |
| Operating Temp | −40°C to +85°C - qualified for industrial-grade ambient operation |
| Package Type | 32-pin LQFP (7 mm × 7 mm, 0.8 mm pitch) with exposed thermal pad |
Pinout & Package
UPD78F1805AK8A2-3B4-G is housed in a 32-pin LQFP package (7 mm × 7 mm, 0.8 mm pitch) with exposed thermal pad for enhanced thermal dissipation in compact industrial control modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, EVDD | Power supply | Dual power domains: VDD for digital logic, EVDD for analog/peripheral circuits - enables noise isolation |
| VSS, EVSS | GND reference | Separate ground returns minimize coupling between digital switching noise and analog measurements |
| P00–P03 | Port 0 I/O | 4-bit general-purpose port with NMI input capability on P00 - supports wake-up from STOP mode |
| P10–P17 | Port 1 I/O | 8-bit bidirectional port with selectable pull-up resistors - used for keypad scan or GPIO expansion |
| RESET | Reset input | Active-low asynchronous reset with internal pull-up - requires external RC or supervisor IC for reliable power-on reset |
| FLMD0 | Flash mode select | Configures boot mode at power-on: high = normal operation, low = Flash programming mode |
Key Features
| Feature | Design Value |
|---|---|
| On-chip Debug Support | Full hardware debug via single-wire interface compatible with QB-MINI2 emulator - no dedicated debug pins required |
| ADC Accuracy | ±2 LSB integral nonlinearity over full temperature range - enables precise current/voltage sensing in motor control |
| PWM Timing Control | Two 16-bit reload timers with complementary output and dead-time insertion - suitable for 3-phase inverter gate drive |
| Low-Power Modes | HALT (CPU stop, peripherals active) and STOP (all clocks halted, wake-up via INT or timer) - reduces standby current to <1 μA |
| Flash Security | Read-out protection enabled by fuse bit - prevents unauthorized firmware extraction during field deployment |
Applications
| Industrial Sensor Node | Brushless DC Motor Controller |
|---|---|
Use Scenario: Compact environmental monitoring unit with temperature, humidity, and CO₂ sensing, transmitting data via UART to gateway. IC Role / Device Role / Timing Role: Central controller managing sensor acquisition, signal conditioning, and serial protocol framing. Use Value: Integrated 10-bit ADC and UART eliminate external signal chain components; 64 KB Flash accommodates OTA update firmware. | Use Scenario: Closed-loop speed control of BLDC motor in HVAC blower using hall-effect feedback and 6-step commutation. IC Role / Device Role / Timing Role: Real-time commutation sequencer with PWM timing, ADC-based current sensing, and fault detection logic. Use Value: Dual 16-bit timers with complementary outputs generate precise 6-step gate drive; 4 KB RAM buffers real-time PID variables. |
| Smart Power Outlet | Programmable Logic Relay |
Use Scenario: DIN-rail mounted outlet with energy metering, load switching, and RS-485 Modbus communication. IC Role / Device Role / Timing Role: System manager coordinating zero-cross detection, relay timing, and protocol stack execution. Use Value: 2.7–5.5 V supply range interfaces directly with auxiliary power rails; I²C supports external EEPROM for configuration storage. | Use Scenario: Industrial relay module replacing electromechanical units with programmable timing, counting, and logic functions. IC Role / Device Role / Timing Role: Deterministic state machine executor with millisecond-level timing resolution and input debouncing. Use Value: HALT/STOP low-power modes extend battery backup runtime; 32-pin LQFP fits standard PCB footprints for retrofit designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| R5F100BAASP#V0 | RL78/G13 core, 32 KB Flash, 4 KB RAM, same 32-pin LQFP but different pin mapping and peripheral register layout | Lacks on-chip DAC; UART baud rate accuracy differs due to internal oscillator tolerance | Select when migrating to Renesas' newer RL78 platform with lower active current and enhanced ESD immunity |
| STM32F030F4P6 | ARM Cortex-M0 core, 16 KB Flash, 4 KB RAM, 20 MHz max clock, 20-pin TSSOP - smaller footprint but fewer I/O and no hardware multiplier | No native 10-bit ADC with 8-channel mux; requires external level-shifting for 5 V tolerant I/O | Choose for cost-sensitive, space-constrained designs where ARM ecosystem tooling is preferred over legacy 78K0R toolchain |
Compared with R5F100BAASP#V0 and STM32F030F4P6, the UPD78F1805AK8A2-3B4-G offers higher Flash density, native 5 V-tolerant I/O, and proven qualification for industrial temperature cycling - making it preferable for long-lifecycle, maintenance-free embedded controllers.
Availability
UPD78F1805AK8A2-3B4-G is available at Aetrix Electronics and suitable for industrial automation, motor control, and smart energy metering requiring stable component supply across multi-year production programs.
Supply support for UPD78F1805AK8A2-3B4-G 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, and power devices for automotive, industrial, and IoT applications.
The UPD78F1805AK8A2-3B4-G belongs to the 78K0R/FB3 product line, designed specifically for cost-optimized, low-power embedded control in resource-constrained industrial equipment with legacy 78K0 software compatibility.
FAQ
What is the maximum operating frequency of the UPD78F1805AK8A2-3B4-G?
The UPD78F1805AK8A2-3B4-G supports a maximum system clock frequency of 20 MHz when using the on-chip PLL with an external crystal. Without PLL, the maximum frequency is 16 MHz using the main oscillator. This timing performance enables deterministic real-time response in motor control loops and sensor sampling at up to 100 kSPS with the integrated 10-bit ADC.
Does the UPD78F1805AK8A2-3B4-G include hardware debug capability?
Yes, the UPD78F1805AK8A2-3B4-G features on-chip debug support via a single-wire interface compatible with Renesas' QB-MINI2 emulator. No dedicated debug pins are required - debug signals share the RESET pin. This allows full breakpoint, step-through, and memory inspection functionality without consuming additional I/O resources during development or field diagnostics.
What package type and pin count does the UPD78F1805AK8A2-3B4-G use?
The UPD78F1805AK8A2-3B4-G uses a 32-pin LQFP package measuring 7 mm × 7 mm with 0.8 mm lead pitch and an exposed thermal pad. This package is pin-compatible with other 78K0R/FB3 devices like UPD78F1804 and UPD78F1806, enabling scalable design reuse across memory and peripheral variants within the same footprint.
Can the UPD78F1805AK8A2-3B4-G operate from a 3.3 V supply?
Yes, the UPD78F1805AK8A2-3B4-G operates across a supply voltage range of 2.7 V to 5.5 V, fully supporting 3.3 V nominal systems. Its I/O pins are 5 V tolerant even when VDD = 3.3 V, allowing direct interfacing with legacy 5 V peripherals such as optocouplers, relays, and RS-232 transceivers without level-shifting circuitry.
Is the UPD78F1805AK8A2-3B4-G qualified for industrial temperature range?
Yes, the UPD78F1805AK8A2-3B4-G is rated for operation from −40°C to +85°C and classified as a Standard-grade Renesas product, qualified for industrial applications including factory automation, building controls, and outdoor metering equipment. Its electrical specifications - including ADC accuracy, Flash write endurance, and clock stability - are guaranteed across this full temperature range.
UPD78F1805AK8A2-3B4-G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- 32-WFQFN Exposed Pad
- Series:
- 78K0R/Fx3
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- 78K/0R
- Core Size:
- 16-Bit
- Speed:
- 24MHz
- Connectivity:
- CSI, I2C, LINbus, SPI, UART/USART
- Peripherals:
- DMA, LVD, POR, PWM, WDT
- Number of I/O:
- 23
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 16K x 8
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 6x10b SAR
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
UPD78F1805AK8A2-3B4-G FAQ
1.How can I place an order for UPD78F1805AK8A2-3B4-G through Aetrix?
Please submit a Request for Quotation (RFQ) for UPD78F1805AK8A2-3B4-G 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 UPD78F1805AK8A2-3B4-G reliable?
The price and inventory of UPD78F1805AK8A2-3B4-G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD78F1805AK8A2-3B4-G is usually 5 days.
3.What payment methods are accepted for UPD78F1805AK8A2-3B4-G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD78F1805AK8A2-3B4-G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UPD78F1805AK8A2-3B4-G?
UPD78F1805AK8A2-3B4-G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UPD78F1805AK8A2-3B4-G 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 UPD78F1805AK8A2-3B4-G?
For technical support, including UPD78F1805AK8A2-3B4-G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD78F1805AK8A2-3B4-G requirements.
6.How does Aetrix verify that UPD78F1805AK8A2-3B4-G is sourced from the original manufacturer or authorized distributors?
All UPD78F1805AK8A2-3B4-G 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 UPD78F1805AK8A2-3B4-G meets industry standards.
7.What is the process for return or replacement of UPD78F1805AK8A2-3B4-G?
All UPD78F1805AK8A2-3B4-G units undergo pre-shipment inspection (PSI). If there is an issue with UPD78F1805AK8A2-3B4-G, 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 UPD78F1805AK8A2-3B4-G part is unused and in its original packaging.
Return procedure for UPD78F1805AK8A2-3B4-G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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