R5K574MCD4FB#10

Memory is the headline on the R5K574MCD4FB#10: this RX74M code doubles code MRAM to 1 MB (with 48 KB of data MRAM and 1.5 MB of ECC SRAM) while staying in a 144-pin LFQFP, running the RXv3e core at 480 MHz with a two-channel EtherCAT slave, CAN FD and 10/100 Ethernet channels. That combination serves firmware-heavy motion controllers whose protocol stacks and application code no longer fit the 512 KB tier but whose production line still wants a leaded, inspectable package. Selection advice: it is the 1 MB twin of the same-batch R5K574M6D4FB#10 - same package, clock and interfaces, twice the code memory - so the step between them is purely a firmware-size decision; if classic CAN 2.0 is enough and the design needs more pins instead, the R5K574MCC4FC#10 moves to LFQFP-176 at the same memory and clock. Parameters verified against Renesas Electronics documentation.