R5F2135CCNFP
R5F2135CCNFP - 16-bit R8C/35C MCU, 128KB Flash, 52-LQFP | Renesas
The Renesas R5F2135CCNFP is a 16-bit single-chip microcontroller from the R8C/35C group, built on the high-efficiency R8C CPU core and housed in a 52-pin LQFP package measuring 10 mm x 10 mm with a 0.65 mm pitch. The device integrates 128 KB of Flash program memory plus 4 KB of data Flash, runs at up to 20 MHz CPU clock, operates from a 1.8 V to 5.5 V supply (2.7 V to 5.5 V for Flash programming), and provides 48 general-purpose I/O pins plus multiple serial interfaces. The R8C/35C family is supported only for customers who have already adopted these products; Renesas recommends the RL78/G14 and RL78/G1F families for new designs.
An R8C MCU is a 16-bit CISC microcontroller that combines a compact, high code-density instruction set with hardware multipliers and rich on-chip peripherals, sitting in the hierarchy: microcontroller -> embedded MCU -> 16-bit MCU -> R8C family -> Renesas 16-bit CISC lineup. Compared with 8-bit MCUs, the R8C architecture delivers higher MIPS per MHz and better C-language code density, while remaining simpler and lower-cost than 32-bit ARM Cortex-M0 alternatives for cost-sensitive appliance, sensor, and motor-control designs.
Key features include 1 MB of linear address space, 6 KB of RAM, on-chip voltage detection, low-voltage detection, watchdog timer, multiple timers (8-bit and 16-bit), a 10-bit A/D converter, UART, I2C-bus, and a clock-synchronous serial interface. Built-in data Flash (4 KB) allows non-volatile parameter storage alongside the main 128 KB program Flash, eliminating an external EEPROM in many designs.
The architecture uses a Harvard-style bus with a small RISC-like CISC instruction set, supporting signed multiply, hardware MAC-style operations, and bit-level addressing for compact control code. The 20 MHz core clock combined with a single-cycle instruction execution for many op-codes yields deterministic interrupt latency suitable for consumer and industrial real-time control.
Typical applications include home appliance control (washing machines, microwave ovens, induction cookers), white-goods motor control (BLDC, fan, pump), HVAC thermostat and sensor interface boards, consumer electronics (rice cookers, water heaters), industrial sensor signal conditioning, and battery-powered smart metering front-ends. The wide 1.8 V to 5.5 V operating range allows direct connection to 4 NiMH cells or a single Li-ion cell via LDO.
When designing with this part, evaluate the roadmap note carefully: Renesas explicitly states the R8C/35C group is supported only for existing customers, while the RL78/G14 and RL78/G1F groups are recommended for new designs. Plan around long-term availability, second-source qualification, and supply risk before committing to new volume production.
This page consolidates distributor pricing, drop-in alternatives, and practical design considerations not found in the manufacturer datasheet alone, including parametric equivalent MPNs from the same R8C/35C group that share the 52-LQFP footprint.
USD $3.92
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