Renesas UPD78F0890GB(A)-GAH-AX

Overview

UPD78F0890GB(A)-GAH-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/FE2 family, featuring 128 KB on-chip Flash memory, 8 KB RAM, and a maximum operating frequency of 20 MHz. It integrates a 10-bit A/D converter with 16 channels, UART, I²C, and 16-bit timer arrays, and targets embedded control in industrial equipment and consumer appliances.

For engineers reviewing the UPD78F0890GB(A)-GAH-AX datasheet, UPD78F0890GB(A)-GAH-AX pinout, UPD78F0890GB(A)-GAH-AX application, or UPD78F0890GB(A)-GAH-AX equivalent, key selection criteria include Flash endurance (100,000 write/erase cycles), A/D conversion time (1.1 μs typical), operating voltage range (2.7–5.5 V), and QFP-100 package compatibility with legacy 78K0 designs.

Technical Context

The UPD78F0890GB(A)-GAH-AX implements the 78K0 CPU core with 16-bit index registers and supports both standard and expanded-specification features including faster self-programming interrupt response (1.5 μs) and improved A/D conversion timing (1.1 μs at 20 MHz). It uses SuperFlash® technology licensed from Silicon Storage Technology for reliable flash memory operation.

It includes dual voltage domains (EVDD/EVSS for analog peripherals, VDD/VSS for digital logic), dedicated reset circuitry with built-in voltage detector (VDL = 2.7 V ±5%), and on-chip debug support via single-wire interface compatible with QB-MINI2 and ID78K0-QB tools.

Key Specifications

Pinout & Package

UPD78F0890GB(A)-GAH-AX is housed in a 100-pin QFP (GAH) package with 0.65 mm lead pitch and 14 mm × 20 mm body size. Pin assignments follow Renesas' standardized 78K0/FE2 layout, supporting drop-in replacement for other GAH-packaged members of the 78K0/Fx2 family.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F0890GB(A)-GAH-AX, R5F100PLAFB#30 offers superior active power efficiency but sacrifices analog domain separation and A/D channel count, while UPD78F0888GB(A)-GAH-AX provides identical peripheral functionality in a lower-cost, pin-compatible variant with reduced Flash capacity.

Availability

UPD78F0890GB(A)-GAH-AX is available at Aetrix Electronics and suitable for industrial motor control, home appliance MCU, factory automation I/O modules, and smart power metering requiring stable component supply across multi-year production cycles.

Supply support for UPD78F0890GB(A)-GAH-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.

The UPD78F0890GB(A)-GAH-AX belongs to the 78K0/Fx2 product line, designed specifically for cost-sensitive, high-reliability embedded control in industrial and consumer equipment where Flash endurance, analog integration, and debug accessibility are critical.

FAQ

What is the maximum operating frequency of the UPD78F0890GB(A)-GAH-AX?

The UPD78F0890GB(A)-GAH-AX operates at a maximum clock frequency of 20 MHz. This speed is supported across its full specified voltage range (2.7–5.5 V) and ambient temperature range (−40°C to +85°C), enabling deterministic real-time execution of control algorithms with cycle-accurate timing guarantees. The 78K0 CPU core delivers 1 MIPs per MHz at this frequency.

Does the UPD78F0890GB(A)-GAH-AX support in-circuit debugging?

Yes, the UPD78F0890GB(A)-GAH-AX supports on-chip debugging via a single-wire serial interface compatible with Renesas development tools including QB-MINI2 and ID78K0-QB. This interface allows full breakpoint, step-through, and register inspection capabilities without requiring additional pins or external debug hardware beyond the standard SWD signal and ground connection.

What is the A/D converter specification for the UPD78F0890GB(A)-GAH-AX?

The UPD78F0890GB(A)-GAH-AX integrates a 10-bit successive-approximation A/D converter with 16 input channels (AN0–AN15), selectable reference sources (AVREF or VDD), and a typical conversion time of 1.1 μs at 20 MHz. It supports simultaneous sampling mode for up to four channels and includes built-in offset calibration registers for precision sensor interfacing.

Is the UPD78F0890GB(A)-GAH-AX pin-compatible with other 78K0/FE2 devices?

Yes, the UPD78F0890GB(A)-GAH-AX uses the standard 100-pin QFP (GAH) package and shares identical pin functions with other 78K0/FE2 microcontrollers in the same package variant, including UPD78F0887GB(A)-GAH-AX and UPD78F0888GB(A)-GAH-AX. This enables hardware reuse across firmware variants and facilitates migration paths within the family.

What quality grade applies to the UPD78F0890GB(A)-GAH-AX?

The UPD78F0890GB(A)-GAH-AX is classified as a "Standard" quality grade device per Renesas documentation, intended for applications including industrial robots, office equipment, home appliances, and communications equipment. It is not qualified for automotive, medical life-support, or aerospace use unless explicitly validated and approved by Renesas for such applications.