Renesas UPD78F0500AFC-AA3-A

Overview

UPD78F0500AFC-AA3-A from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/Kx2 family, featuring 64 KB on-chip Flash memory, 4 KB RAM, and a 16-bit CPU core operating at up to 20 MHz. It integrates UART, I²C, 10-bit ADC (8 channels), 16-bit timer arrays, and operates from 2.7 V to 5.5 V supply. It targets industrial control panels and sensor interface modules requiring deterministic real-time response.

For engineers reviewing the UPD78F0500AFC-AA3-A datasheet, UPD78F0500AFC-AA3-A pinout, UPD78F0500AFC-AA3-A application, or UPD78F0500AFC-AA3-A equivalent, key selection criteria include Flash endurance (100,000 erase/write cycles), A/D conversion time (≤1.2 μs), X1 oscillator stability (±0.5% over -40°C to +85°C), and support for self-programming library with ≤120 μs interrupt response.

Technical Context

The UPD78F0500AFC-AA3-A implements the 78K0S/KB2 core with 16-bit ALU and 8-bit data bus, supporting 131 instructions including bit manipulation and block transfer. Its peripheral set includes three 16-bit timer arrays (each with capture/compare/PWM), one serial array unit (SAU) configurable as UART/I²C/SPI, and a 10-bit successive-approximation ADC with internal reference.

It uses a two-stage pipeline architecture enabling 1-cycle instruction execution for most instructions at 20 MHz. The device supports four power-saving modes (HALT, STOP, SNOOZE, and IDLE), with wake-up from STOP mode via external interrupt or RTC alarm within 4 μs. Memory protection is implemented via flash lock bits and register write-protection control.

Key Specifications

Pinout & Package

The UPD78F0500AFC-AA3-A is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad, rated for industrial temperature range and RoHS-compliant finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with UPD78F0500AFC-AA3-A, R5F100LEAFB#30 offers superior low-power operation but sacrifices Flash endurance and ADC speed, while STM8L152R8T6 provides higher-resolution ADC within a narrower supply range-neither matches the UPD78F0500AFC-AA3-A's balance of industrial voltage range, Flash reliability, and deterministic timing.

Availability

UPD78F0500AFC-AA3-A is available at Aetrix Electronics and suitable for industrial HMI panels, sensor signal conditioning modules, motor control interfaces, building automation nodes, and embedded instrumentation requiring stable component supply across extended product lifecycles.

Supply support for UPD78F0500AFC-AA3-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 78K0/Kx2 product line delivers cost-optimized, high-reliability 8-bit MCUs targeting industrial control, sensor interfacing, and legacy system replacement where deterministic real-time behavior and long-term supply stability are critical.

FAQ

What is the maximum operating frequency of the UPD78F0500AFC-AA3-A?

The UPD78F0500AFC-AA3-A supports a maximum system clock frequency of 20 MHz using the on-chip PLL or external crystal oscillator. This enables 1-cycle instruction execution for most operations, delivering deterministic real-time response essential for industrial control loops and sensor sampling. The device maintains timing compliance across its full industrial temperature range (-40°C to +85°C) and supply voltage range (2.7 V to 5.5 V).

Does the UPD78F0500AFC-AA3-A include on-chip debug capability?

Yes, the UPD78F0500AFC-AA3-A integrates on-chip debugging support compatible with Renesas QB-MINI2 and ID78K0-QB tools. It features a dedicated debug interface (NMI/INTP0 pin multiplexed for debug communication) enabling full breakpoint control, register inspection, and flash programming without requiring external JTAG hardware. This capability is active during normal operation and does not consume user I/O resources.

What is the Flash memory endurance specification for the UPD78F0500AFC-AA3-A?

The UPD78F0500AFC-AA3-A guarantees 100,000 erase/write cycles for its 64 KB on-chip Flash memory, with data retention specified for 20 years at 85°C. This endurance rating applies under standard operating conditions defined in the Renesas 78K0/Kx2 User's Manual Rev.4.01 and is validated across the full industrial temperature range. The self-programming library includes built-in erase verification to ensure reliability during field updates.

Can the UPD78F0500AFC-AA3-A operate from a 3.3 V supply?

Yes, the UPD78F0500AFC-AA3-A operates reliably from a 3.3 V supply, as confirmed by its specified supply voltage range of 2.7 V to 5.5 V. All I/O pins are 5 V tolerant when configured as inputs, and the internal voltage regulator (controlled via REGC pin) maintains stable core voltage regardless of supply level. This allows direct integration into mixed-voltage systems without level shifters.

How many analog input channels does the UPD78F0500AFC-AA3-A support?

The UPD78F0500AFC-AA3-A supports eight analog input channels (AN0 through AN7) connected to its 10-bit successive-approximation ADC. These channels are mapped to Port 2 pins (P20–P27) and can be selected via the AD converter control register. The ADC includes internal reference voltage and supports programmable sample-and-hold timing, enabling accurate measurements across the full supply range.