Renesas R5F2L357CNFP#51

Overview

R5F2L357CNFP#51 from Renesas is a 16-bit R8C/L35C Group single-chip microcontroller featuring the R8C CPU core, 48 KB program flash, 6 KB RAM, and 1 KB × 4 data flash with background operation (BGO). It delivers 50 ns minimum instruction execution at 20 MHz, integrates a 16×16→32-bit hardware multiplier, and supports LCD drive (up to 4 COM / 24 SEG) for embedded control in household appliances.

For engineers reviewing the R5F2L357CNFP#51 datasheet, R5F2L357CNFP#51 pinout, R5F2L357CNFP#51 application, or R5F2L357CNFP#51 equivalent, key selection criteria include its 52-pin LQFP package, -20°C to +85°C N-version temperature grade, 10-channel 10-bit ADC, dual 8-bit DACs, and integrated LIN module using UART0 and Timer RA.

Technical Context

The R5F2L357CNFP#51 implements the R8C CPU core with 89 fundamental instructions and a 1 Mbyte address space, enabling high-efficiency code execution. Its system clock generation includes XIN/XOUT (20 MHz max), XCIN/XCOUT (32 kHz), high-speed on-chip oscillator (frequency-adjustable), and low-speed on-chip oscillator - all selectable via software-controlled clock switching.

Peripheral integration includes Timer RA/RB/RC/RD/RE/RG (with PWM, input capture, real-time clock, and complementary three-phase output modes), UART0/1/2 (with I²C-bus mode), SSU, DTC (1 channel, 38 activation sources), and voltage detection circuitry supporting power-on reset and dual-level voltage monitoring.

Key Specifications

Pinout & Package

Package: 52-pin LQFP (PLQP0052JA-A), 10 mm × 10 mm, 0.65 mm pin pitch, exposed pad not specified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F2L357CNFP#51, R5F2L358CNFP#51 offers seamless scalability within the same footprint, while R5F2L367CNFP#51 provides broader peripheral headroom at the cost of package change - both retain identical R8C core architecture and toolchain compatibility.

Availability

R5F2L357CNFP#51 is available at Aetrix Electronics and suitable for refrigerator control panels, printer mainboards, air purifier UI modules, and audio amplifier front panels requiring stable component supply and long-term industrial availability.

Supply support for R5F2L357CNFP#51 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 is a global semiconductor leader specializing in microcontrollers, analog, and power devices for industrial, automotive, and consumer markets.

The R8C/L35C Group targets cost-sensitive, low-power embedded systems requiring integrated LCD driving, analog sensing, and LIN connectivity - optimized for appliance and office equipment control.

FAQ

What is the maximum operating frequency and supply voltage range for the R5F2L357CNFP#51?

The R5F2L357CNFP#51 operates at up to 20 MHz with VCC = 2.7–5.5 V, or 5 MHz with VCC = 1.8–5.5 V. Its minimum instruction execution time is 50 ns under 20 MHz/5.0 V conditions and 200 ns under 5 MHz/1.8 V conditions. The device supports four clock sources: external crystal (XIN), 32 kHz sub-clock (XCIN), and two on-chip oscillators - all swappable in real time.

Does the R5F2L357CNFP#51 support hardware LIN communication?

Yes, the R5F2L357CNFP#51 includes a dedicated hardware LIN module compliant with LIN 2.1, implemented using UART0 and Timer RA. This enables direct connection to LIN transceivers without software bit-banging, supporting baud rates up to 20 kbps and automatic sync-break detection. The module handles header transmission, checksum calculation, and response timing per LIN specification.

How many ADC channels and what resolution does the R5F2L357CNFP#51 provide?

The R5F2L357CNFP#51 integrates a 10-bit successive-approximation ADC with 10 input channels (AN0–AN9), supporting sample-and-hold and hardware-triggered sweep mode. Inputs are multiplexed across P0_0–P0_5, P13_0–P13_3, and P2_4–P2_7. Conversion time is 1.5 µs typical at 10 MHz internal clock, and results are stored directly in RAM via DTC transfer to minimize CPU overhead.

What LCD driving capability does the R5F2L357CNFP#51 offer?

The R5F2L357CNFP#51 supports static, 1/2, 1/3, and 1/4 duty LCD driving with up to 4 common (COM0–COM3) and 24 segment (SEG0–SEG23) outputs. It lacks VL3 and SEG52–SEG55 pins, so 1/4 bias and 1/8 duty are unavailable. Bias voltage generation is internal, and the LCD controller operates independently of CPU during display refresh - reducing active power consumption.

Is the R5F2L357CNFP#51 pin-compatible with other R8C/L3x series MCUs?

No - the R5F2L357CNFP#51 uses a 52-pin LQFP (PLQP0052JA-A) package unique to the R8C/L35C Group. R8C/L36C (64-pin), L38C (80-pin), and L3AC (100-pin) variants have different pin counts, I/O allocations, and LCD pin mappings. While core architecture and register layout are consistent across the family, PCB layout and schematic design are not interchangeable between groups.