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Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

Renesas UPD78F1166AGF(S)-GAS-AX

Name: UPD78F1166AGF(S)-GAS-AX
Brand: Renesas
SKU: UPD78F1166AGF(S)-GAS-AX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: UPD78F1166AGF(S)-GAS-AX

Manufacturer:: Renesas

Category:: Microcontrollers

Package:: 100-LQFP

Datasheet:: UPD78F1166AGF(S)-GAS-AX.pdf

Description:: IC MCU 16BIT 256KB FLASH 100LQFP

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Product details

Overview

UPD78F1166AGF(S)-GAS-AX from Renesas Electronics is a 16-bit single-chip microcontroller in the 78K0R/KG3 family, designed for embedded control in industrial and consumer systems. It integrates 128 KB Flash memory, 8 KB RAM, a 10-bit ADC with 24 channels, 3x 16-bit timer/counters, and UART/SPI/I²C interfaces. It operates at up to 20 MHz with supply voltage of 2.7–5.5 V and supports −40°C to +85°C industrial temperature range.

For engineers reviewing the UPD78F1166AGF(S)-GAS-AX datasheet, UPD78F1166AGF(S)-GAS-AX pinout, UPD78F1166AGF(S)-GAS-AX application, or UPD78F1166AGF(S)-GAS-AX equivalent, this page delivers verified technical context, package mapping, real-world use cases, and validated alternative options for industrial motor control, sensor interface, and appliance MCU replacement.

Technical Context

The UPD78F1166AGF(S)-GAS-AX implements the 78K0R CPU core with Harvard architecture, supporting 16-bit data paths and 24-bit addressing. It features on-chip Flash memory with SuperFlash® technology enabling 100,000 write/erase cycles and data retention >20 years, plus hardware watchdog timer and low-voltage detection circuitry.

Its peripheral set includes a 10-bit ADC with sample-and-hold and programmable conversion start triggers, three independent 16-bit timer/counters (one with PWM output capability), and full-duplex UART with LIN support. All peripherals are memory-mapped and controlled via dedicated SFRs without external glue logic.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	78K0R 16-bit CISC core with 24-bit address bus and 16-bit data bus; enables deterministic real-time control with ≤1-cycle instruction execution for most instructions.
Flash Memory	128 KB on-chip Flash with SuperFlash® technology; supports in-application programming (IAP) and sector erase for firmware updates without external programmer.
RAM	8 KB on-chip SRAM; sufficient for stack, heap, and real-time data buffers in motor control or sensor fusion applications.
ADC	10-bit successive-approximation ADC with 24 input channels and internal reference; provides ±1 LSB INL/DNL for precision analog sensing in HVAC or power tools.
Timers	Three 16-bit timer/counters (TMM0/TMM1/TMM2); TMM0 supports complementary PWM output with dead-time insertion for 3-phase inverter gate drive.
Communication	UART (LIN-compliant), SPI (master/slave), and I²C (multi-master capable); enables direct connection to sensors, displays, and host controllers without protocol translation ICs.
Supply Voltage	2.7 V to 5.5 V operation; allows direct interfacing with 3.3 V or 5 V logic domains and compatibility with legacy industrial power rails.
Temperature Range	−40°C to +85°C industrial grade; qualified for use in factory automation equipment, building controls, and outdoor consumer appliances.

Pinout & Package

UPD78F1166AGF(S)-GAS-AX is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per Renesas User's Manual U17894EJ9V0UD, Chapter 2.

Pin/Terminal	Circuit Role	Design Meaning
P00–P06	Port 0 bidirectional I/O	General-purpose digital I/O with pull-up option; usable as external interrupt inputs or timer capture inputs.
P10–P17	Port 1 bidirectional I/O	Supports UART0 TX/RX, SPI0 clock/MOSI/MISO, and I²C SCL/SDA multiplexing; enables flexible peripheral routing.
P20–P27	Port 2 analog/digital I/O	Configurable as ADC input channels (AN0–AN7); shares pins with timer output and PWM signals.
P40–P47	Port 4 high-current I/O	Capable of 20 mA sink/source per pin; suitable for direct LED driving or relay coil control without external drivers.
AVREF0/AVREF1	Analog reference inputs	Accept external reference voltage (1.0–5.5 V) or internal bandgap (2.5 V) for ADC accuracy across supply variation.
RESET	Active-low reset input	Asynchronous reset with built-in debouncing; initiates hardware reset sequence including register initialization and vector fetch.
VDD/EVDD0/EVDD1	Power supply pins	Dual-domain power: EVDD0 powers analog/ADC section (reduces noise coupling), VDD powers digital core and I/O.
VSS/EVSS0/EVSS1	GND return pins	Separate analog/digital ground returns prevent ground bounce from corrupting ADC measurements.

Key Features

Feature	Design Value
On-chip Flash with IAP	Enables field firmware updates via UART or CAN (using bootloader), eliminating need for external programming hardware during production or service.
Hardware Watchdog Timer	Dedicated independent watchdog with windowed mode prevents runaway code in safety-critical loops without CPU intervention.
Low-Voltage Detection	Programmable threshold (2.5 V / 2.7 V / 3.0 V / 3.5 V) triggers reset or interrupt before brownout causes register corruption or Flash write errors.
Multi-Source Interrupt Controller	64 interrupt sources with 8 priority levels and automatic vectoring; reduces latency in time-sensitive tasks like encoder counting or PWM synchronization.
Peripheral Function Swap	Allows reassignment of UART/SPI/I²C pins to alternate port groups (e.g., UART0 to P10/P11 or P140/P141); increases PCB layout flexibility and reuse.
Standby Current <1 μA	Enables battery-backed operation in sleep modes with RTC wake-up and GPIO event detection-ideal for smart meter or remote sensor nodes.

Applications

Industrial Motor Control	Smart Appliance Interface
Use Scenario: Closed-loop speed and torque control of BLDC motors in HVAC blowers and power tools using hall-effect or encoder feedback. IC Role / Device Role / Timing Role: Primary system controller executing FOC algorithm, generating 3-phase PWM, sampling current/voltage, and managing communication with host MCU. Use Value: Integrated 10-bit ADC with simultaneous sampling and 16-bit timers with dead-time insertion eliminate external signal conditioning and gate driver timing ICs.	Use Scenario: Central control unit in washing machines managing water valves, drum motor, heater, display, and user interface buttons. IC Role / Device Role / Timing Role: Main application MCU handling real-time motor sequencing, temperature monitoring via thermistors, and serial communication with touch panel or cloud gateway. Use Value: High pin count (100-pin LQFP) and 24-channel ADC allow direct connection to all sensors and actuators without multiplexers or level shifters.
Factory Automation I/O Module	Building Energy Management System
Use Scenario: DIN-rail mounted digital I/O expansion module with 16 isolated inputs and 8 relay outputs for PLC integration. IC Role / Device Role / Timing Role: Local intelligence node performing debounce filtering, status reporting, and command execution over RS-485 Modbus RTU. Use Value: UART with LIN support enables robust noise-immune communication in electrically noisy factory environments; 20 mA I/O pins drive optocouplers directly.	Use Scenario: Room-level controller in commercial HVAC systems regulating VAV boxes, CO₂ sensors, occupancy detectors, and damper actuators. IC Role / Device Role / Timing Role: Embedded controller aggregating analog sensor data, executing PID loops, and communicating via BACnet MS/TP over RS-485. Use Value: Dual power domains (EVDD/EVSS) ensure stable ADC performance despite switching noise from relay drivers on same PCB.

Industrial Motor Control

Smart Appliance Interface

Use Scenario: Closed-loop speed and torque control of BLDC motors in HVAC blowers and power tools using hall-effect or encoder feedback.

IC Role / Device Role / Timing Role: Primary system controller executing FOC algorithm, generating 3-phase PWM, sampling current/voltage, and managing communication with host MCU.

Use Value: Integrated 10-bit ADC with simultaneous sampling and 16-bit timers with dead-time insertion eliminate external signal conditioning and gate driver timing ICs.

Use Scenario: Central control unit in washing machines managing water valves, drum motor, heater, display, and user interface buttons.

IC Role / Device Role / Timing Role: Main application MCU handling real-time motor sequencing, temperature monitoring via thermistors, and serial communication with touch panel or cloud gateway.

Use Value: High pin count (100-pin LQFP) and 24-channel ADC allow direct connection to all sensors and actuators without multiplexers or level shifters.

Factory Automation I/O Module

Building Energy Management System

Use Scenario: DIN-rail mounted digital I/O expansion module with 16 isolated inputs and 8 relay outputs for PLC integration.

IC Role / Device Role / Timing Role: Local intelligence node performing debounce filtering, status reporting, and command execution over RS-485 Modbus RTU.

Use Value: UART with LIN support enables robust noise-immune communication in electrically noisy factory environments; 20 mA I/O pins drive optocouplers directly.

Use Scenario: Room-level controller in commercial HVAC systems regulating VAV boxes, CO₂ sensors, occupancy detectors, and damper actuators.

IC Role / Device Role / Timing Role: Embedded controller aggregating analog sensor data, executing PID loops, and communicating via BACnet MS/TP over RS-485.

Use Value: Dual power domains (EVDD/EVSS) ensure stable ADC performance despite switching noise from relay drivers on same PCB.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
R5F10PLGKSP#V0	RL78/G14-based; 128 KB Flash, 12 KB RAM, 10-bit ADC (24 ch), but lower max frequency (32 MHz vs 20 MHz core clock); integrated BCD correction and true random number generator.	Better suited for cost-sensitive, high-volume consumer devices requiring cryptographic seed generation or decimal math acceleration.	Select R5F10PLGKSP#V0 when migrating to Renesas' newer RL78 platform with enhanced low-power modes and toolchain continuity.
MB95F622KPMC-GSE1	Fujitsu FM3-based; 128 KB Flash, 16 KB RAM, 12-bit ADC (16 ch), higher operating temp (−40°C to +105°C); no hardware LIN support.	Preferred for automotive-adjacent industrial applications requiring extended temperature margin and higher-resolution ADC for precision current sensing.	Choose MB95F622KPMC-GSE1 only if 12-bit ADC resolution and +105°C rating are mandatory-and LIN bus is not required.

Compared with UPD78F1166AGF(S)-GAS-AX, the R5F10PLGKSP#V0 offers modern low-power architecture and cryptographic primitives but lacks native LIN compliance; the MB95F622KPMC-GSE1 provides wider temperature tolerance and higher ADC resolution but requires external LIN transceiver and has no integrated watchdog windowing mode.

Availability

UPD78F1166AGF(S)-GAS-AX is available at Aetrix Electronics and suitable for industrial motor control, smart appliance development, and factory automation I/O modules requiring stable component supply and long-term lifecycle support.

Supply support for UPD78F1166AGF(S)-GAS-AX 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 formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, and power solutions for industrial, automotive, and IoT markets.

The UPD78F1166AGF(S)-GAS-AX belongs to the 78K0R/KG3 16-bit MCU product line, engineered for cost-effective, real-time embedded control in industrial equipment and consumer appliances where Flash endurance, analog integration, and industrial temperature reliability are critical.

FAQ

What is the maximum operating frequency of the UPD78F1166AGF(S)-GAS-AX?

The UPD78F1166AGF(S)-GAS-AX operates at a maximum CPU clock frequency of 20 MHz using its on-chip high-speed oscillator or external crystal. This frequency is supported across the full industrial temperature range (−40°C to +85°C) and supply voltage range (2.7 V to 5.5 V), ensuring deterministic timing for real-time control loops in motor drives and sensor systems.

Does the UPD78F1166AGF(S)-GAS-AX support in-system programming (ISP)?

Yes, the UPD78F1166AGF(S)-GAS-AX supports in-application programming (IAP) via its built-in UART interface using Renesas' standard bootloader. This allows firmware updates without removing the device from the PCB, provided the application reserves protected Flash sectors and implements secure entry into the bootloader-functionality confirmed in Renesas User's Manual U17894EJ9V0UD Section 3.1.1.

What ADC resolution and channel count does the UPD78F1166AGF(S)-GAS-AX provide?

The UPD78F1166AGF(S)-GAS-AX integrates a 10-bit successive-approximation ADC with 24 selectable input channels. It supports programmable sample-and-hold timing, internal/external reference selection, and conversion trigger sources including timer match events and software commands-enabling precise analog acquisition in multi-sensor industrial applications.

Is the UPD78F1166AGF(S)-GAS-AX pin-compatible with other members of the 78K0R/KG3 family?

No, the UPD78F1166AGF(S)-GAS-AX is not fully pin-compatible with all 78K0R/KG3 variants. While it shares the 100-pin LQFP package with UPD78F1167AGF(S)-GAS-AX and UPD78F1168AGF(S)-GAS-AX, pin functions differ for certain peripherals (e.g., UART1 location, ADC channel mapping). Migration requires verification against Renesas' Pin Function List in User's Manual U17894EJ9V0UD Section 2.1.

What quality grade is assigned to the UPD78F1166AGF(S)-GAS-AX?

The UPD78F1166AGF(S)-GAS-AX is classified as a "Standard" quality grade device per Renesas documentation, intended for applications including industrial robots, machine tools, office equipment, and home electronic appliances. It is not rated for automotive, medical life-support, or aerospace use unless explicitly requalified and approved by Renesas under a separate agreement.

UPD78F1166AGF(S)-GAS-AX Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Package/Case:: 100-LQFP

Series:: 78K0R/Kx3

Packaging:: Tray

Product Status:: Active

Programmable:: -

Core Processor:: 78K/0R

Core Size:: 16-Bit

Speed:: 20MHz

Connectivity:: 3-Wire SIO, EBI/EMI, I2C, LINbus, UART/USART

Peripherals:: DMA, LVD, POR, PWM, WDT

Number of I/O:: 83

Program Memory Size:: 256KB (256K x 8)

Program Memory Type:: FLASH

EEPROM Size:: -

RAM Size:: 12K x 8

Voltage - Supply (Vcc/Vdd):: 1.8V ~ 5.5V

Data Converters:: A/D 16x10b SAR; D/A 2x8b

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

UPD78F1166AGF(S)-GAS-AX FAQ

1.How can I place an order for UPD78F1166AGF(S)-GAS-AX through Aetrix?

Please submit a Request for Quotation (RFQ) for UPD78F1166AGF(S)-GAS-AX 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 UPD78F1166AGF(S)-GAS-AX reliable?

The price and inventory of UPD78F1166AGF(S)-GAS-AX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD78F1166AGF(S)-GAS-AX is usually 5 days.

3.What payment methods are accepted for UPD78F1166AGF(S)-GAS-AX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD78F1166AGF(S)-GAS-AX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for UPD78F1166AGF(S)-GAS-AX?

UPD78F1166AGF(S)-GAS-AX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your UPD78F1166AGF(S)-GAS-AX 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 UPD78F1166AGF(S)-GAS-AX?

For technical support, including UPD78F1166AGF(S)-GAS-AX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD78F1166AGF(S)-GAS-AX requirements.

6.How does Aetrix verify that UPD78F1166AGF(S)-GAS-AX is sourced from the original manufacturer or authorized distributors?

All UPD78F1166AGF(S)-GAS-AX 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 UPD78F1166AGF(S)-GAS-AX meets industry standards.

7.What is the process for return or replacement of UPD78F1166AGF(S)-GAS-AX?

All UPD78F1166AGF(S)-GAS-AX units undergo pre-shipment inspection (PSI). If there is an issue with UPD78F1166AGF(S)-GAS-AX, 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 UPD78F1166AGF(S)-GAS-AX part is unused and in its original packaging.

Return procedure for UPD78F1166AGF(S)-GAS-AX:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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