R5K574N6E4AE#00

A full-size package does not have to mean a full-speed clock: the R5K574N6E4AE#00 places the RX74N's 300 MHz tier in the 320-ball LFBGA, keeping the complete pin resources, the single gigabit Ethernet MAC, classic CAN 2.0, 512 KB of code MRAM, 48 KB of data MRAM and 1.5 MB of ECC SRAM. That suits always-on network controllers, protocol converters and HMI-adjacent control boards where I/O count and Ethernet throughput matter more than raw core frequency, and where the lower clock relaxes power delivery and cooling. Selection advice: the in-catalog R5K574N6A4AE#00 is this code's 600 MHz counterpart in the identical package and memory size, so the E code is a deliberate derating choice; designs needing CAN FD at this clock tier should use the F-signature codes instead. Parameters verified against Renesas Electronics documentation.