Renesas R5F2L357CDFP#3L

Overview

R5F2L357CDFP#3L from Renesas is a 16-bit R8C/L35C Group single-chip microcontroller featuring an 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 multiplier, and supports LCD drive (up to 4 COM / 24 SEG pins) for appliance control panels.

For engineers reviewing the R5F2L357CDFP#3L datasheet, R5F2L357CDFP#3L pinout, R5F2L357CDFP#3L application, or R5F2L357CDFP#3L equivalent, this MCU is selected for cost-sensitive, low-power embedded systems requiring integrated analog (10-bit ADC × 10), serial interfaces (UART × 3, I²C, LIN), and robust EMI/EMS performance in household and consumer equipment.

Technical Context

The R5F2L357CDFP#3L implements the R8C CPU core with 89 fundamental instructions and a dedicated hardware multiplier supporting multiply-accumulate operations. Its system clock generation includes four independent circuits: XIN oscillator (20 MHz max), XCIN (32 kHz), high-speed on-chip oscillator (with frequency adjustment), and low-speed on-chip oscillator - enabling flexible power-mode management across wait, stop, and power-off states.

Peripheral integration centers on mixed-signal timing and human interface functions: Timer RA/RB/RC/RD/RE/RG provide PWM, input capture, real-time clock, and three-phase motor control capabilities; the 10-bit A/D converter supports sweep mode across 10 channels; and the LCD controller drives static or multiplexed displays with selectable bias (1/2, 1/3) and duty (static, 1/2–1/4).

Key Specifications

Pinout & Package

52-pin LQFP (PLQP0052JA-A) package with 0.65 mm pin pitch, optimized for compact consumer appliance PCBs and compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F2L357CNFP, the R5F2L357CDFP#3L offers extended temperature range (-40°C to +85°C) critical for automotive-adjacent or outdoor-rated appliances; compared with R5F2L367CDFP, it provides identical functionality in a smaller 52-pin footprint - reducing PCB area and BOM cost where I/O headroom is sufficient.

Availability

R5F2L357CDFP#3L is available at Aetrix Electronics and suitable for household appliance control, consumer audio interfaces, and industrial sensor nodes requiring stable component supply, long lifecycle support, and guaranteed traceability.

Supply support for R5F2L357CDFP#3L 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 solutions for automotive, industrial, and IoT markets.

The R8C/L35C Group, including R5F2L357CDFP#3L, was designed for cost-optimized, low-power embedded control in consumer appliances and office equipment - emphasizing integrated LCD driving, analog sensing, and robust EMC performance.

FAQ

What is the maximum operating frequency and corresponding supply voltage for R5F2L357CDFP#3L?

The R5F2L357CDFP#3L operates up to 20 MHz when supplied at 2.7–5.5 V, achieving a minimum instruction execution time of 50 ns. At lower voltages (1.8–5.5 V), the maximum frequency is reduced to 5 MHz for safe operation under brown-out conditions - verified in the R01DS0095EJ0101 datasheet Section 1.4.

Does R5F2L357CDFP#3L support in-circuit debugging and flash programming?

Yes, R5F2L357CDFP#3L includes full on-chip debug functionality and supports on-board flash rewrite via dedicated debug interface. The device implements ROM code protection and ID code check features to secure firmware during development and production - confirmed in Table 1.6 and Section 2.2 of the official datasheet.

How many analog input channels does R5F2L357CDFP#3L support, and what resolution do they offer?

R5F2L357CDFP#3L integrates a 10-bit successive-approximation ADC with 10 dedicated analog input channels (AN0–AN9), all accessible through P0 and P13 pins. The ADC includes sample-and-hold circuitry and sweep mode for automatic sequential conversion - detailed in Table 1.5 and Section 3.4 of the R01DS0095EJ0101 datasheet.

Can R5F2L357CDFP#3L drive a 4-digit 7-segment display directly?

Yes, R5F2L357CDFP#3L can drive a 4-digit 7-segment display directly using its LCD controller in static mode: P7_4–P7_7 serve as COM0–COM3, while P0_0–P0_7 and P2_4–P2_7 provide up to 24 segment outputs - sufficient for 4 digits × 7 segments + decimal points. Bias is configurable to 1/2 or 1/3 for optimal contrast - per Section 1.1.3 and Figure 1.5.

What low-power modes are available on R5F2L357CDFP#3L, and what are their typical current draws?

R5F2L357CDFP#3L supports wait mode (3.5 µA @ 3.0 V, 32 kHz), stop mode (2 µA), and power-off mode (0.02 µA) - all measured at VCC = 3.0 V. These modes retain RAM content and allow wake-up via external interrupt or RTC alarm, making them ideal for battery-backed appliance standby functions - specified in Table 1.6 of the datasheet.