Renesas DF2646RFC20J

Overview

DF2646RFC20J from Renesas Electronics is a 16-bit single-chip microcontroller in the H8S/2600 Series, featuring a 32-bit H8S/2600 CPU core, 128 KB on-chip F-ZTAT™ flash memory, 4 KB SRAM, and integrated peripherals including TPU, PPG, WDT, SCI, A/D converter, PWM timer, LCD controller/driver, and DTC. It targets high-level embedded control systems requiring reprogrammable firmware and real-time motor or display management.

For engineers reviewing the DF2646RFC20J datasheet, DF2646RFC20J pinout, DF2646RFC20J application, or DF2646RFC20J equivalent, key selection considerations include its 144-pin FP package, 5 V operation, CAN interface support (with external transceiver), LCD driver capability, and flash reprogramming flexibility for production updates.

Technical Context

The DF2646RFC20J implements the H8S/2646R variant with F-ZTAT™ flash memory, enabling in-system reprogramming without UV erasure. Its architecture integrates a data transfer controller (DTC) that offloads CPU for high-speed peripheral-to-memory transfers, and supports multiple low-power modes-subactive, watch, module stop, and sleep-with independent clock domain control for WDT0/WDT1.

It features dual SCI channels (SCI1 and SCI2), a 10-bit A/D converter with 8 input channels, and a motor control PWM unit with complementary outputs (PWM1A–PWM1H, PWM2A–PWM2H). The device requires an external CAN bus transceiver (e.g., HA13721) and supports crystal resonator frequencies from 4 to 20 MHz on EXTAL/XTAL pins.

Key Specifications

Pinout & Package

DF2646RFC20J uses the FP-144J (144-pin Fine Pitch QFP) package with 0.5 mm lead pitch, 20 mm × 20 mm body size, and exposed thermal pad. Pin functions are defined per operating mode and register configuration, with shared pins supporting multiple roles including I/O, timer I/O, serial interfaces, LCD segment/common outputs, and interrupt inputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DF2646RFC20J, HD64F2646R offers identical functionality with alternate part numbering, while R5F21266SDFP trades LCD support and larger flash for compact packaging and improved robustness-making DF2646RFC20J optimal where integrated display driving and field-upgradable firmware are essential.

Availability

DF2646RFC20J is available at Aetrix Electronics and suitable for industrial motor drives, automotive body controllers, medical infusion pumps, and smart energy meter displays requiring stable component supply across long-lifecycle programs.

Supply support for DF2646RFC20J 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, and power devices for industrial, automotive, and infrastructure markets.

The H8S/2600 Series-including DF2646RFC20J-was designed for high-performance embedded control in applications demanding real-time responsiveness, integrated peripherals, and field-reprogrammable flash, especially where motor control, LCD interfacing, and CAN networking converge.

FAQ

What is the maximum operating frequency of the DF2646RFC20J?

The DF2646RFC20J supports a maximum CPU operating frequency of 27 MHz when using the on-chip PLL with an external 4–20 MHz crystal on EXTAL/XTAL. At this speed, instruction execution achieves approximately 13.5 MIPS, validated under 4.5–5.5 V supply and industrial temperature range (–40°C to +85°C).

Does the DF2646RFC20J include a built-in CAN transceiver?

No, the DF2646RFC20J integrates a CAN protocol controller compliant with ISO 11898-1 (CAN 2.0B), but requires an external CAN bus transceiver such as the HA13721 or compatible device to drive the physical CANH/CANL lines. The controller handles message filtering, transmission scheduling, and error handling in hardware.

Can the DF2646RFC20J drive a graphic LCD panel?

The DF2646RFC20J's integrated LCD controller/driver (LCDC) supports static and multiplexed segment-type displays (up to 128 segments × 8 commons), not pixel-addressable graphic LCDs. It generates internal bias voltages and includes a charge pump, making it suitable for character-based or segmented displays in meters and appliances-but not for TFT or dot-matrix panels.

What programming tools are supported for flashing firmware onto the DF2646RFC20J?

DF2646RFC20J supports in-circuit programming via its on-chip F-ZTAT™ flash using Renesas' E8/E8a emulators, High-performance Embedded Workshop IDE, and third-party tools compatible with the H8S/2600 Series. Programming can also be performed in dedicated programmer mode using PROM programmers qualified for "FZTAT128V5A" device type.

Is the DF2646RFC20J RoHS compliant and lead-free?

Yes, the DF2646RFC20J is manufactured in a lead-free process and complies with EU RoHS Directive 2011/65/EU. The FP-144J package uses matte tin plating, and all materials declarations confirm absence of restricted substances above threshold limits, as documented in Renesas' official environmental reports.