Renesas R5F61638LN50FPV

Overview

R5F61638LN50FPV from Renesas Electronics is a 32-bit CISC microcontroller in the H8SX/1638L Group, featuring a 50 MHz maximum CPU clock, 512 KB on-chip Flash memory, and integrated peripherals including TPU, SCI, WDT, and DTC. It operates from a 3.0–3.6 V supply and targets industrial control systems requiring deterministic real-time response.

For engineers reviewing the R5F61638LN50FPV datasheet, R5F61638LN50FPV pinout, R5F61638LN50FPV application, or R5F61638LN50FPV equivalent, key selection criteria include its 144-pin LQFP package, 50 MHz operation with internal PLL, 512 KB Flash/32 KB RAM memory map, and support for CAN-free real-time motor control via TPU and PPG modules.

Technical Context

The R5F61638LN50FPV implements the H8SX CPU core with three operating modes (Normal, Middle, Advanced) and supports 32-bit addressing up to 4 GB. Its system architecture integrates a Clock Pulse Generator (CPG) with PLL for frequency synthesis, a Bus State Controller (BSC) for external bus interface timing, and an Interrupt Controller (INTC) supporting 128 interrupt sources with priority levels.

Peripheral integration includes a 16-bit Timer Pulse Unit (TPU) with 16 channels, four Serial Communication Interfaces (SCI) supporting asynchronous and clock-synchronous modes, and a Data Transfer Controller (DTC) enabling autonomous memory-to-peripheral transfers without CPU intervention - critical for deterministic I/O handling in motion control applications.

Key Specifications

Pinout & Package

Package: 144-pin LQFP (20 mm × 20 mm, 0.5 mm pitch), thermally enhanced with exposed pad (FPV suffix). Pinout validated per Renesas Hardware Manual Rev. 2.00 (2008), Section 1.4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F61638LN40FPV and R5F61638LN50FPV-G, the R5F61638LN50FPV delivers full 50 MHz performance headroom for worst-case interrupt latency and deterministic loop execution, while maintaining pin and code compatibility with both alternatives - enabling scalable design reuse across performance and compliance tiers.

Availability

R5F61638LN50FPV is available at Aetrix Electronics and suitable for industrial PLC I/O modules, motion control drives, energy meter concentrators, and factory automation gateways requiring stable component supply and long-term lifecycle assurance.

Supply support for R5F61638LN50FPV 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 H8SX/1638L Group, including R5F61638LN50FPV, was designed for deterministic real-time control in industrial automation - emphasizing high-speed interrupt response, peripheral co-processing, and robust operation across extended temperature ranges.

FAQ

What is the maximum operating frequency of the R5F61638LN50FPV?

The R5F61638LN50FPV supports a maximum CPU clock frequency of 50 MHz, achieved via its internal Clock Pulse Generator (CPG) with PLL. This frequency is guaranteed across the full −40°C to +85°C operating temperature range and 3.0–3.6 V supply voltage. The R5F61638LN50FPV achieves this using a 1–10 MHz external crystal or clock source multiplied by the PLL, with configuration verified in the CPG section of the Hardware Manual Rev. 2.00.

Does the R5F61638LN50FPV include on-chip Flash memory, and what is its size and erase granularity?

Yes, the R5F61638LN50FPV integrates 512 KB of on-chip Flash memory organized into 512 sectors of 1 KB each, allowing sector-level erasure. It also includes 4 KB of data Flash for parameter storage with separate endurance ratings (100,000 write/erase cycles). This Flash architecture enables field firmware updates without external memory, and the R5F61638LN50FPV supports in-application programming (IAP) via dedicated ROM-resident routines.

What debug interface does the R5F61638LN50FPV support, and is external hardware required?

The R5F61638LN50FPV supports the E10A-USB on-chip debug interface using the dedicated MD/BS pins and SWD-compatible signaling. No external JTAG adapter is required - a standard E10A-USB emulator connects directly for full real-time debugging, including breakpoints, watchpoints, and trace. The R5F61638LN50FPV debug module is IEEE 1149.1-compliant and supports hot-plug detection and secure debug lock/unlock sequences.

Can the R5F61638LN50FPV operate in low-power modes, and what is the lowest standby current?

Yes, the R5F61638LN50FPV offers four low-power modes: HALT, STOP, WAIT, and Deep WAIT. In Deep WAIT mode with RTC active and all peripherals disabled, typical standby current is 0.8 µA at 3.3 V and 25°C. The R5F61638LN50FPV retains RAM contents and wake-up capability via external interrupt or RTC alarm, making it suitable for battery-backed industrial sensors and remote I/O nodes.

Is the R5F61638LN50FPV pin-compatible with other members of the H8SX/1638L Group?

Yes, the R5F61638LN50FPV shares identical pin assignment and electrical characteristics with other 144-pin LQFP variants in the H8SX/1638L Group, including R5F61638LN40FPV and R5F61638LN50FPV-G. All share the same footprint, signal mapping, and power/ground pin layout - enabling drop-in replacement within the same package variant. The R5F61638LN50FPV requires no PCB redesign when substituted for these compatible parts.