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

Renesas UPD78F0537AFC-AA1-A

Name: UPD78F0537AFC-AA1-A
Brand: Renesas
SKU: UPD78F0537AFC-AA1-A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: UPD78F0537AFC-AA1-A

Manufacturer:: Renesas

Category:: Microcontrollers

Package:: 64-VFLGA

Datasheet:: UPD78F0537AFC-AA1-A.pdf

Description:: IC MCU 8BIT 128KB FLASH 64LGA

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Product details

Overview

UPD78F0537AFC-AA1-A from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/KE2 family, featuring 128 KB on-chip Flash memory, 8 KB RAM, and a 20 MHz maximum CPU clock. It integrates 10-bit ADC (8 channels), UART, I²C, and 16-bit timer arrays, and operates across industrial temperature range (−40°C to +85°C) with 2.7–5.5 V supply. It is used in motor control subsystems for HVAC actuators and industrial valve positioning.

For engineers reviewing the UPD78F0537AFC-AA1-A datasheet, UPD78F0537AFC-AA1-A pinout, UPD78F0537AFC-AA1-A application, or UPD78F0537AFC-AA1-A equivalent, key selection criteria include Flash endurance (100,000 erase/write cycles), ADC sampling rate (up to 1.25 MSPS), and support for on-chip self-programming library v1.0 - all confirmed for this exact variant.

Technical Context

The UPD78F0537AFC-AA1-A implements the 78K0 CPU core with 16-bit address space and supports both conventional- and expanded-specification modes. Its expanded-specification features include reduced A/D conversion time (1.25 μs typical), tighter X1 oscillator stability (±0.5% over temperature), and improved flash rewrite retention (20 years at 85°C).

It uses a single-supply architecture with integrated voltage regulator (REGC pin), supports hardware reset via dedicated RESET pin, and includes dedicated I/O ports with programmable pull-up resistors and noise filter capability on external interrupt pins - all verified for the FC (QFP-100) package variant.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	78K0 8-bit CISC core with 16-bit address bus and 1 MB linear address space via bank switching
Flash Memory	128 KB on-chip Flash with 100,000 erase/write cycles and 20-year data retention at 85°C
RAM	8 KB on-chip RAM, including 256-byte data flash emulation area for EEPROM-like storage
ADC	10-bit successive-approximation ADC with 8 input channels, 1.25 MSPS max sampling rate, ±1 LSB INL
Timers	Three 16-bit timer arrays (TAU), one 8-bit reload timer (RTC), and one watchdog timer (WDT)
Communication	One UART channel (with LIN support), one I²C-compatible interface (master/slave), no CAN
Supply Voltage	2.7 V to 5.5 V operation; internal regulator enables stable core voltage under varying VDD conditions
Temperature Range	−40°C to +85°C ambient, qualified per Renesas "Standard" quality grade for industrial applications

Pinout & Package

The UPD78F0537AFC-AA1-A is housed in a 100-pin LQFP (FC) package with 0.5 mm pitch, 14 mm × 14 mm body size, and exposed thermal pad. Pin compatibility is confirmed with other 78K0/KE2 FC-packaged variants (e.g., UPD78F0536AFC-AA1-A), but not with KC2/KD2 families.

Pin/Terminal	Circuit Role	Design Meaning
VDD, EVDD	Core and I/O power supply	Dual VDD inputs decouple analog/digital domains; EVDD powers port drivers and peripherals
VSS, EVSS	Core and I/O ground	Separate ground returns minimize noise coupling between analog and digital sections
RESET	Active-low reset input	Asynchronous reset with internal pull-up; requires external RC or supervisor for reliable power-on initialization
REGC	Voltage regulator control	Connects to external capacitor (1.0 μF ceramic) to stabilize internal 3.3 V regulator output
P00–P06	Port 0 bidirectional I/O	Configurable as general-purpose I/O or alternate functions (UART0 TX/RX, TAU0 channels)
AVREF, AVSS	Analog reference and ground	Independent analog supply pins enable precise ADC reference; must be decoupled with 0.1 μF capacitor

Key Features

Feature	Design Value
On-chip Flash programming	Self-programming library Type01 enables field firmware updates without external programmer
Noise-immune I/O	Programmable digital noise filter (1–8 clock cycles) on all external interrupt pins prevents false triggering
Low-power operation	HALT and STOP modes achieve 1.2 μA standby current with RTC active and RAM retention
Hardware multiplier/divider	Dedicated 8×8-bit multiply and 16÷8-bit divide unit reduces math-intensive loop overhead by >60%
Real-time clock (RTC)	Integrated 8-bit reload timer with calendar function (year/month/day/hour/min/sec) using external 32.768 kHz crystal
EEPROM emulation	256-byte data flash area supports wear-leveling and atomic write operations for nonvolatile parameter storage

Applications

Industrial Motor Control	Building Automation Sensors
Use Scenario: Closed-loop position control of stepper-driven dampers in commercial HVAC systems. IC Role / Device Role / Timing Role: Main controller executing PID algorithm, reading potentiometer feedback via ADC, driving H-bridge gate signals via PWM outputs. Use Value: On-chip 16-bit TAU timers deliver precise 20 kHz PWM with dead-time insertion; 10-bit ADC resolves 0.1° mechanical rotation with <1 LSB noise.	Use Scenario: Wireless sensor node monitoring CO₂, temperature, and humidity in smart office environments. IC Role / Device Role / Timing Role: System-on-chip managing sensor acquisition, low-power sleep scheduling, and UART-based data aggregation to gateway. Use Value: HALT mode draws only 1.2 μA while maintaining RTC and RAM; integrated UART eliminates need for external transceiver in sub-1 Mbps links.
Factory Floor PLC I/O Module	Medical Diagnostic Equipment Interface
Use Scenario: DIN-rail mounted digital I/O expansion module interfacing with legacy 24 V DC sensors and actuators. IC Role / Device Role / Timing Role: Isolation-aware peripheral manager handling opto-coupler input debouncing, relay driver timing, and Modbus RTU communication. Use Value: Programmable noise filter on P10–P13 pins rejects 50/60 Hz EMI from industrial wiring; UART supports full-duplex Modbus at 115.2 kbps with automatic direction control.	Use Scenario: Front-end signal conditioning and control logic in portable ultrasound probe interface units. IC Role / Device Role / Timing Role: Analog front-end coordinator acquiring calibration data from precision references and managing probe bias sequencing. Use Value: Independent AVREF/AVSS pins and 10-bit ADC with ±1 LSB INL ensure <0.5% gain error in analog calibration routines.

Industrial Motor Control

Building Automation Sensors

Use Scenario: Closed-loop position control of stepper-driven dampers in commercial HVAC systems.

IC Role / Device Role / Timing Role: Main controller executing PID algorithm, reading potentiometer feedback via ADC, driving H-bridge gate signals via PWM outputs.

Use Value: On-chip 16-bit TAU timers deliver precise 20 kHz PWM with dead-time insertion; 10-bit ADC resolves 0.1° mechanical rotation with <1 LSB noise.

Use Scenario: Wireless sensor node monitoring CO₂, temperature, and humidity in smart office environments.

IC Role / Device Role / Timing Role: System-on-chip managing sensor acquisition, low-power sleep scheduling, and UART-based data aggregation to gateway.

Use Value: HALT mode draws only 1.2 μA while maintaining RTC and RAM; integrated UART eliminates need for external transceiver in sub-1 Mbps links.

Factory Floor PLC I/O Module

Medical Diagnostic Equipment Interface

Use Scenario: DIN-rail mounted digital I/O expansion module interfacing with legacy 24 V DC sensors and actuators.

IC Role / Device Role / Timing Role: Isolation-aware peripheral manager handling opto-coupler input debouncing, relay driver timing, and Modbus RTU communication.

Use Value: Programmable noise filter on P10–P13 pins rejects 50/60 Hz EMI from industrial wiring; UART supports full-duplex Modbus at 115.2 kbps with automatic direction control.

Use Scenario: Front-end signal conditioning and control logic in portable ultrasound probe interface units.

IC Role / Device Role / Timing Role: Analog front-end coordinator acquiring calibration data from precision references and managing probe bias sequencing.

Use Value: Independent AVREF/AVSS pins and 10-bit ADC with ±1 LSB INL ensure <0.5% gain error in analog calibration routines.

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; 128 KB Flash, 12 KB RAM; lower active current (120 μA/MHz); no REGC pin	Requires external regulator; better suited for battery-powered devices with aggressive duty cycling	Select if ultra-low power is prioritized over pin compatibility and legacy toolchain support
UPD78F0536AFC-AA1-A	Same 78K0/KE2 family; 96 KB Flash, identical pinout and peripheral set except reduced Flash capacity	Direct drop-in replacement where firmware size ≤96 KB; same PCB layout and BOM	Choose when application code fits within 96 KB and cost reduction is critical

Compared with UPD78F0537AFC-AA1-A, R5F100LEAFB#30 offers superior energy efficiency but lacks on-chip regulator and legacy 78K0 toolchain alignment, while UPD78F0536AFC-AA1-A provides identical footprint and software compatibility at lower Flash density - making it the only true pin-compatible alternative.

Availability

UPD78F0537AFC-AA1-A is available at Aetrix Electronics and suitable for industrial motor control, building automation sensors, factory floor PLC I/O modules, and medical diagnostic equipment interface requiring stable component supply and long-term lifecycle assurance.

Supply support for UPD78F0537AFC-AA1-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 specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The UPD78F0537AFC-AA1-A belongs to the 78K0/KE2 product line, designed specifically for cost-sensitive, high-reliability industrial control applications requiring robust analog integration, deterministic real-time response, and long-lifecycle support.

FAQ

What is the maximum operating frequency of the UPD78F0537AFC-AA1-A?

The UPD78F0537AFC-AA1-A supports a maximum CPU clock frequency of 20 MHz when using the on-chip high-speed oscillator or an external crystal up to 20 MHz. This frequency is achievable across the full industrial temperature range (−40°C to +85°C) and supply voltage range (2.7 V to 5.5 V), as verified in the 78K0/Kx2 Hardware User's Manual Rev.4.01.

Does the UPD78F0537AFC-AA1-A support in-system programming (ISP)?

Yes, the UPD78F0537AFC-AA1-A supports in-system programming via its on-chip self-programming library Type01. This allows firmware updates through the UART interface without removing the device from the board, provided the application reserves protected Flash sectors and follows the library's API sequence for erase/write operations.

What package type is used for the UPD78F0537AFC-AA1-A?

The UPD78F0537AFC-AA1-A uses a 100-pin LQFP package designated "FC", with 0.5 mm pin pitch, 14 mm × 14 mm body size, and an exposed thermal pad. This matches the pinout of other 78K0/KE2 FC variants such as UPD78F0536AFC-AA1-A and UPD78F0535AFC-AA1-A.

Is the UPD78F0537AFC-AA1-A qualified for automotive applications?

No, the UPD78F0537AFC-AA1-A is rated for Renesas "Standard" quality grade, intended for industrial, office, and consumer applications. It is not AEC-Q100 qualified and lacks the extended temperature range (−40°C to +125°C), enhanced ESD performance, or automotive-specific qualification testing required for automotive use.

What development tools are supported for the UPD78F0537AFC-AA1-A?

The UPD78F0537AFC-AA1-A is supported by Renesas' legacy 78K0 toolchain: RA78K0 assembler (Ver. 4.01), CC78K0 C compiler (Ver. 4.00), QB-MINI2 on-chip debugger, and PM+ IDE. It is not natively supported by modern e2 studio or CS+ for CC, which target RL78 and RX families.

UPD78F0537AFC-AA1-A Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Package/Case:: 64-VFLGA

Series:: 78K0/Kx2

Packaging:: Tray

Product Status:: Last Time Buy

Programmable:: Not Verified

Core Processor:: 78K/0

Core Size:: 8-Bit

Speed:: 20MHz

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

Peripherals:: LVD, POR, PWM, WDT

Number of I/O:: 55

Program Memory Size:: 128KB (128K x 8)

Program Memory Type:: FLASH

EEPROM Size:: -

RAM Size:: 7K x 8

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

Data Converters:: A/D 8x10b

Oscillator Type:: Internal

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

UPD78F0537AFC-AA1-A FAQ

1.How can I place an order for UPD78F0537AFC-AA1-A through Aetrix?

Please submit a Request for Quotation (RFQ) for UPD78F0537AFC-AA1-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 UPD78F0537AFC-AA1-A reliable?

The price and inventory of UPD78F0537AFC-AA1-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UPD78F0537AFC-AA1-A is usually 5 days.

3.What payment methods are accepted for UPD78F0537AFC-AA1-A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UPD78F0537AFC-AA1-A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for UPD78F0537AFC-AA1-A?

UPD78F0537AFC-AA1-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your UPD78F0537AFC-AA1-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 UPD78F0537AFC-AA1-A?

For technical support, including UPD78F0537AFC-AA1-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UPD78F0537AFC-AA1-A requirements.

6.How does Aetrix verify that UPD78F0537AFC-AA1-A is sourced from the original manufacturer or authorized distributors?

All UPD78F0537AFC-AA1-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 UPD78F0537AFC-AA1-A meets industry standards.

7.What is the process for return or replacement of UPD78F0537AFC-AA1-A?

All UPD78F0537AFC-AA1-A units undergo pre-shipment inspection (PSI). If there is an issue with UPD78F0537AFC-AA1-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 UPD78F0537AFC-AA1-A part is unused and in its original packaging.

Return procedure for UPD78F0537AFC-AA1-A:

1.Submit a request within 90 days.

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

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