Renesas R5F211B1SP#U0

Overview

R5F211B1SP#U0 from Renesas Electronics is a 16-bit single-chip microcontroller in the R8C/1B Group, featuring an R8C/Tiny Series CPU core, 4 KB program flash ROM, 1 KB × 2 data flash memory, 384 bytes RAM, and operation at up to 20 MHz (50 ns min. instruction time). It integrates 10-bit A/D conversion (4 channels), UART, I²C bus interface, three timers (8-bit ×2, 16-bit ×1), and 13 I/O ports - deployed in consumer appliance control and industrial sensor interfaces.

For engineers reviewing the R5F211B1SP#U0 datasheet, R5F211B1SP#U0 pinout, R5F211B1SP#U0 application, or R5F211B1SP#U0 equivalent, key selection considerations include its 20-pin LSSOP package (PLSP0020JB-A), -20°C to +85°C operating range, on-chip voltage detection and power-on reset, and dual data flash blocks enabling reliable parameter storage without external EEPROM.

Technical Context

The R5F211B1SP#U0 implements the R8C/Tiny Series 16-bit CPU with 89 fundamental instructions and 1 Mbyte address space. Its memory architecture separates 4 KB program flash (1,000 erase/write cycles) from two independent 1 KB data flash blocks (10,000 cycles), supporting field-updatable configuration storage.

Peripheral integration includes a 10-bit A/D converter with four analog inputs (AN8–AN11), dual UART channels (TXD0/RXD0 and TXD1/RXD1), I²C bus interface (SCL/SDA), clock-synchronous serial I/O (SSI00/SSI01), and timer resources: Timer X/Z (8-bit with prescaler) and Timer C (16-bit with input capture/output compare).

Key Specifications

Pinout & Package

Package: 20-pin molded-plastic LSSOP (PLSP0020JB-A), 7.6 mm × 4.4 mm body, 0.65 mm lead pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with R5F211A1SP, R5F211B1SP#U0 adds field-writable data storage without increasing pin count or power consumption; compared with R5F211B2SP, it trades ROM capacity for cost-sensitive deployments where 4 KB suffices and data retention is essential.

Availability

R5F211B1SP#U0 is available at Aetrix Electronics and suitable for home appliance control, industrial sensor interfaces, and office equipment power management requiring stable component supply across long-lifecycle manufacturing programs.

Supply support for R5F211B1SP#U0 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 Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and consumer markets.

The R8C/1B Group, including R5F211B1SP#U0, was designed for cost-sensitive, low-power embedded control in appliances and sensors - emphasizing integrated analog peripherals, dual data flash, and compact 20-pin packaging.

FAQ

What is the maximum operating frequency and corresponding supply voltage range for R5F211B1SP#U0?

R5F211B1SP#U0 operates at up to 20 MHz with a supply voltage of 3.0–5.5 V. At 10 MHz, it supports a wider range of 2.7–5.5 V, enabling flexibility in battery-powered or low-voltage designs while maintaining full peripheral functionality and 50 ns/100 ns minimum instruction times respectively.

Does R5F211B1SP#U0 support in-system programming, and what voltage is required?

Yes, R5F211B1SP#U0 supports in-system programming of both program ROM and data flash using the standard VCC supply (2.7–5.5 V). No external high-voltage programmer is needed - all flash operations execute under normal operating voltage, simplifying production programming and field firmware updates.

How many analog input channels does the 10-bit A/D converter in R5F211B1SP#U0 support?

The R5F211B1SP#U0 integrates a single 10-bit A/D converter with four dedicated analog input channels: AN8, AN9, AN10, and AN11 - mapped to P1_0, P1_1, P1_2, and P1_3 respectively. Each channel supports programmable sampling timing and can use either internal or external VREF for ratiometric accuracy.

What are the key differences between R5F211B1SP#U0 and R5F211A1SP?

The core difference is data flash: R5F211B1SP#U0 includes two 1 KB data flash blocks (10,000 write/erase cycles), while R5F211A1SP has none. All other specifications - CPU, RAM, peripherals, package, and operating conditions - are identical, making R5F211B1SP#U0 the direct upgrade for applications requiring nonvolatile parameter storage.

Which package type is used by R5F211B1SP#U0, and what are its mechanical dimensions?

R5F211B1SP#U0 uses the PLSP0020JB-A package: a 20-pin plastic LSSOP with 0.65 mm lead pitch, 7.6 mm × 4.4 mm body size, and 1.2 mm max height. This JEDEC-standard footprint ensures compatibility with automated SMT assembly and provides thermal performance suitable for sealed consumer enclosures.