Renesas D72246FA20V

Overview

D72246FA20V from Renesas Electronics is a 16-bit single-chip microcontroller in the H8S/2245 Group, featuring an H8S/2000 CPU core, 20 MHz maximum clock rate, 128 KB on-chip ROM (mask version), 8 KB RAM, and integrated peripherals including TPU, SCI, A/D converter, watchdog timer, and DTC. It targets real-time industrial control systems requiring deterministic timing and compact embedded processing.

For engineers reviewing the D72246FA20V datasheet, D72246FA20V pinout, D72246FA20V application, or D72246FA20V equivalent, this page delivers verified technical context, package mapping, functional pin roles, key timing and memory specifications, and validated alternative options for industrial MCU selection.

Technical Context

The D72246FA20V implements the H8S/2000 32-bit internal architecture with sixteen 16-bit general-purpose registers, supporting linear 16 Mbyte address space access across eight configurable memory areas. It executes basic instructions in one state and supports C-compiled code efficiently.

On-chip peripherals include a 16-bit Timer Pulse Unit (TPU) with input capture/output compare, full-duplex Serial Communication Interface (SCI), 10-bit 8-channel A/D converter, programmable watchdog timer, and Data Transfer Controller (DTC) enabling CPU-free DMA-like transfers between memory and peripheral registers.

Key Specifications

Pinout & Package

Package: 100-pin plastic LQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, standard industrial temperature grade (–20°C to +75°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with D72246FA20V, R5F22246BDFP offers lower integration at reduced cost and footprint, while HD64F2246F20V trades mask-ROM permanence for field-programmable flexibility-both retain identical peripheral functionality and real-time performance characteristics.

Availability

D72246FA20V is available at Aetrix Electronics and suitable for industrial motor control, factory automation I/O modules, energy metering front-ends, building HVAC controllers, and embedded instrumentation requiring stable component supply across multi-year production cycles.

Supply support for D72246FA20V 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 specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The H8S/2245 Group, including D72246FA20V, was designed for cost-effective, high-reliability real-time control in industrial equipment where deterministic timing, integrated peripherals, and long-term supply stability are essential.

FAQ

What is the maximum operating frequency of the D72246FA20V?

The D72246FA20V operates at a maximum clock frequency of 20 MHz. This rating is guaranteed across the full industrial temperature range (–20°C to +75°C) and 4.5 V to 5.5 V supply voltage. At 20 MHz, the H8S/2000 core executes basic arithmetic instructions in 50 ns, enabling tight real-time loop control. The D72246FA20V requires a stable external clock source applied to the EXTAL/XTAL pins or a crystal oscillator circuit meeting Renesas' load capacitance and drive level specifications.

Does the D72246FA20V support in-system programming (ISP)?

No, the D72246FA20V does not support in-system programming. It uses mask-programmed ROM, meaning firmware is permanently embedded during wafer fabrication and cannot be modified after packaging. This design ensures absolute code integrity and immunity to accidental overwrite, making it ideal for high-volume, fixed-function applications such as industrial controllers where firmware stability is critical. For field-upgradable alternatives, consider the Flash-based HD64F2246F20V variant.

What peripheral interfaces are integrated into the D72246FA20V?

The D72246FA20V integrates a 16-bit Timer Pulse Unit (TPU), Serial Communication Interface (SCI), 10-bit 8-channel A/D converter, programmable watchdog timer, 8-bit timers, and a Data Transfer Controller (DTC). It also provides six general-purpose I/O ports (P1–P6), two high-current ports (PA, PB), and four chip select outputs (CS0–CS3) for external memory or peripheral expansion. These peripherals are fully documented in the H8S/2245 Group Hardware Manual (Rev. 3.00) and require no external glue logic for common industrial interfacing tasks.

What is the purpose of the MD2–MD0 pins on the D72246FA20V?

The MD2–MD0 pins on the D72246FA20V configure the device's operating mode at power-on reset. These three pins encode one of eight possible modes-including single-chip mode (default for mask ROM operation), expanded bus mode, and PROM mode. Their logic levels must be fixed externally (via pull-up/pull-down resistors) before power-up and remain stable throughout operation. Incorrect or floating MD pin states will result in undefined boot behavior or failure to execute from on-chip ROM. Mode selection directly affects address space mapping and peripheral enablement.

Is the D72246FA20V qualified for automotive applications?

No, the D72246FA20V is not qualified for automotive applications. It is rated for industrial temperature range (–20°C to +75°C) and classified as a "Standard" quality grade device per Renesas' product categorization-intended for office equipment, communications gear, industrial robots, and factory automation systems. It lacks AEC-Q100 qualification, extended temperature support (–40°C to +125°C), and automotive-specific reliability testing. For automotive use, Renesas offers separate H8SX or RH850 families with appropriate qualification and support documentation.