Renesas R5F10267ASM#55

Overview

R5F10267ASM#55 from Renesas Electronics is a 20-pin, 4 KB code flash, 2 KB data flash, 256 B RAM RL78/G12 16-bit microcontroller operating at 1.8–5.5 V with ultra-low power consumption (63 μA/MHz), integrated 10-bit A/D converter (11 channels), and UART/CSI/I²C serial interfaces - deployed in battery-powered sensor nodes and industrial control panels.

For engineers reviewing the R5F10267ASM#55 datasheet, R5F10267ASM#55 pinout, R5F10267ASM#55 application, or R5F10267ASM#55 equivalent, key selection criteria include its TSSOP20 package, -40°C to +85°C industrial-grade temperature range (A-grade), on-chip data flash for parameter storage, DMA support, and CRC hardware acceleration - all critical for firmware-upgradable embedded systems requiring long-term reliability and low active/idle current.

Technical Context

The R5F10267ASM#55 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, delivering 31 DMIPS at 24 MHz using its high-accuracy ±1.0% on-chip oscillator (1–24 MHz selectable). It integrates dedicated peripherals including two CSI channels, two simplified I²C channels, one UART channel, four 16-bit timer channels, and a window watchdog timer.

Its memory subsystem includes 4 KB of code flash (1 KB block size, self-programmable), 2 KB of data flash supporting background operation (BGO) and 1M write cycles, and 256 B of on-chip RAM - all accessible under HALT, STOP, and SNOOZE low-power modes. The device supports key interrupt (6-channel), N-ch open-drain I/O (2 pins rated to 6 V), and analog inputs with internal 1.45 V reference and temperature sensor.

Key Specifications

Pinout & Package

Package: 20-pin plastic TSSOP (4.4 × 6.5 mm, 0.65-mm pitch), RoHS-compliant, moisture sensitivity level (MSL) 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10267ASM#55, R5F10268ASM#55 provides scalable memory headroom while retaining identical low-power behavior and peripheral set, whereas R5F10367ASM#55 trades data flash, DMA, and oscillator stability for lower unit cost - making it suitable only for fixed-function, non-upgradable devices.

Availability

R5F10267ASM#55 is available at Aetrix Electronics and suitable for smart home sensor nodes, industrial panel controllers, white goods motor control, and portable medical monitors requiring stable component supply, long-lifecycle assurance, and full traceability.

Supply support for R5F10267ASM#55 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, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G12 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and industrial control applications - emphasizing energy efficiency, integrated analog, and robust firmware update capability.

FAQ

What is the maximum operating frequency and oscillator accuracy of the R5F10267ASM#55?

The R5F10267ASM#55 supports a maximum operating frequency of 24 MHz using its high-speed on-chip oscillator, which maintains ±1.0% accuracy over -20°C to +85°C ambient temperature. This specification applies specifically to the R5F102xx series; the R5F103xx variants offer only ±5.0% accuracy. The R5F10267ASM#55 also supports external crystal oscillation up to 20 MHz for higher precision timing-critical applications.

Does the R5F10267ASM#55 include on-chip data flash memory, and what are its endurance specifications?

Yes, the R5F10267ASM#55 integrates 2 KB of on-chip data flash memory supporting background operation (BGO), allowing program execution from code flash while rewriting data flash. It guarantees 1,000,000 write/erase cycles (typical) across the full 1.8–5.5 V supply range, enabling reliable storage of calibration data, device configuration, or firmware update payloads without external EEPROM.

How many analog input channels does the R5F10267ASM#55 support, and what reference options are available?

The R5F10267ASM#55 features 11 analog input channels (ANI0–ANI3, ANI16–ANI22) with 10-bit resolution. It provides an internal 1.45 V reference voltage and supports differential measurement using AVREFP and AVREFM pins. External reference voltages may be applied, but the analog input must remain within –0.3 V to AVREF(+) + 0.3 V to ensure valid A/D conversion results.

What low-power modes are supported by the R5F10267ASM#55, and what are their typical current draws?

The R5F10267ASM#55 supports HALT, STOP, and SNOOZE modes. In active mode, it consumes 63 μA/MHz at 1.8–5.5 V. HALT mode stops the CPU clock while preserving RAM and register contents; STOP mode halts all clocks except the low-speed oscillator (15 kHz), drawing ~0.5 μA; SNOOZE mode enables selective peripheral operation (e.g., ADC, UART) during deep sleep, consuming ~1.2 μA while maintaining wake-up responsiveness.

Is the R5F10267ASM#55 pin-compatible with other RL78/G12 devices in the TSSOP20 package?

Yes, the R5F10267ASM#55 shares identical pinout and footprint with all other 20-pin RL78/G12 devices in TSSOP20 packaging (e.g., R5F10266ASM#55, R5F10268ASM#55, R5F10367ASM#55), including matching power, ground, reset, oscillator, and I/O pin locations. However, functional differences exist - such as presence of data flash, DMA, or CRC - so firmware and peripheral initialization must be validated per specific part number.