Renesas DF2506BR26DV

Overview

DF2506BR26DV from Renesas Electronics is a 16-bit single-chip microcomputer in the H8S/2506 Group, featuring an H8S/2000 CPU core, 256 KB on-chip flash memory (F-ZTAT™), 16-channel 10-bit A/D converter, five serial communication interfaces (SCI), and dual D/A converters. It operates at up to 33 MHz with 3.3 V supply and supports industrial control, motor drive, and embedded instrumentation applications.

For engineers reviewing the DF2506BR26DV datasheet, DF2506BR26DV pinout, DF2506BR26DV application, or DF2506BR26DV equivalent, key selection criteria include its 144-pin LQFP package, dual watchdog timers, integrated I²C bus interface (IIC2), and support for both normal and advanced CPU operating modes.

Technical Context

The DF2506BR26DV implements the H8S/2000 CPU architecture with 32-bit internal data paths and 24-bit addressing, enabling efficient 16-bit instruction execution and memory-mapped peripheral access. It integrates a 16-bit timer pulse unit (TPU) with six independent channels, four 8-bit timers (TMR), and a programmable bus controller supporting 16-bit external bus expansion.

Its on-chip peripherals include a data transfer controller (DTC) for autonomous memory-to-peripheral transfers, PC break controller (PBC) for real-time debugging, and dual watchdog timers (WDT) with independent clock sources - one driven by the main system clock and another by an on-chip low-speed oscillator.

Key Specifications

Pinout & Package

DF2506BR26DV is housed in a 144-pin LQFP package with exposed thermal pad. Pin functions are mode-dependent (normal/expanded bus mode); primary roles include multiplexed address/data bus (AD0–AD15), dedicated control signals (AS#, DS#, WR#, RD#), and peripheral-specific I/O (e.g., TPU0–TPU5, SCI0–SCI4, AD0–AD15, DA0–DA1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F21256SNFP and HD64F2506F26DV, the DF2506BR26DV uniquely combines full peripheral integration (dual IIC2, five SCI), F-ZTAT™ flash reprogrammability, and 144-pin expandability - making it optimal for upgradable industrial controllers requiring long-term field maintenance.

Availability

DF2506BR26DV is available at Aetrix Electronics and suitable for industrial PLC I/O modules, brushless DC motor drives, programmable logic relays, and embedded test instrumentation requiring stable component supply across extended production lifecycles.

Supply support for DF2506BR26DV 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/2506 Group - including DF2506BR26DV - was designed for deterministic real-time control in resource-constrained industrial equipment, emphasizing robust peripheral integration, flash flexibility, and long-lifecycle support.

FAQ

What is the maximum operating frequency of the DF2506BR26DV?

The DF2506BR26DV operates at a maximum frequency of 33 MHz under 3.3 V supply conditions, as specified in the H8S/2506 Group Hardware Manual Rev.6.00. This clock speed enables sub-100 μs interrupt response times and supports real-time control loops in motor drive and PLC applications. The DF2506BR26DV achieves this performance using an on-chip PLL that multiplies an external crystal or clock source, with timing validated across industrial temperature ranges (−40°C to +85°C).

Does the DF2506BR26DV support in-system programming of its flash memory?

Yes, the DF2506BR26DV features F-ZTAT™ (Fast Zero-wait-state Access Time) flash memory, allowing full in-system programming without erasure delays or special voltage requirements. This capability is confirmed in the H8S/2506 Group Hardware Manual and enables field firmware updates, parameter tuning, and secure bootloader implementation. The DF2506BR26DV's flash supports 10,000 write/erase cycles and retains data for 20 years at 85°C.

How many serial communication interfaces does the DF2506BR26DV include?

The DF2506BR26DV integrates five independent Serial Communication Interface (SCI) modules and two I²C bus interfaces (IIC2). All five SCIs support asynchronous full-duplex operation with programmable baud rates, framing, and error detection - ideal for Modbus RTU, ASCII protocols, or custom host-device links. The DF2506BR26DV's dual IIC2 modules operate concurrently, enabling simultaneous communication with multiple slave devices such as EEPROMs, temperature sensors, and display controllers.

What is the resolution and channel count of the DF2506BR26DV's analog-to-digital converter?

The DF2506BR26DV includes a single 16-channel, 10-bit successive-approximation analog-to-digital converter (ADC) with a typical conversion time of 1.2 μs. It supports software and hardware trigger sources, selectable sample-and-hold periods, and built-in offset/gain calibration registers. This ADC configuration allows the DF2506BR26DV to simultaneously monitor multiple analog sensors (e.g., current, voltage, temperature) in industrial control systems without external multiplexing hardware.

Is the DF2506BR26DV pin-compatible with other members of the H8S/2500 series?

The DF2506BR26DV shares the same 144-pin LQFP package and core pinout with the HD64F2506F26DV, making them mechanically and electrically pin-compatible. However, functional differences exist - notably the DF2506BR26DV's F-ZTAT™ flash versus the HD64F2506F26DV's mask ROM, and presence of dual IIC2 interfaces. No other H8S/2500-series part matches the DF2506BR26DV's exact peripheral set and package combination.