Renesas R5F101ACASP#X0

Overview

R5F101ACASP#X0 from Renesas is a 30-pin, 16 KB flash, data-flash-free RL78/G13 16-bit microcontroller with ultra-low-power operation (66 μA/MHz active, 0.57 μA RTC+LVD), 1.6–5.5 V supply, and integrated 10-bit ADC (6 channels), RTC, and UART/I²C/CSI interfaces - deployed in battery-powered sensor nodes and industrial control panels.

For engineers reviewing the R5F101ACASP#X0 datasheet, R5F101ACASP#X0 pinout, R5F101ACASP#X0 application, or R5F101ACASP#X0 equivalent, key selection criteria include its LSSOP-30 package, absence of data flash memory, -40°C to +85°C industrial-grade temperature range, and support for SNOOZE mode wake-up via peripheral interrupts.

Technical Context

The R5F101ACASP#X0 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, enabling instruction execution times from 0.03125 μs (32 MHz high-speed mode) to 30.5 μs (32.768 kHz subsystem clock). It integrates on-chip power-on-reset (POR), voltage detector (LVD) with 14 selectable levels, and HALT/STOP/SNOOZE low-power modes.

It features 2 KB RAM, 16 KB code flash (1 KB block size), no data flash, 6-channel 10-bit A/D converter with internal 1.45 V reference, and real-time clock with calendar, alarm, and clock correction functions - all operating across a single 1.6–5.5 V supply rail.

Key Specifications

Pinout & Package

Package: 30-pin plastic LSSOP (7.62 mm, 0.65-mm pitch), JEDEC MS-013AC compliant, surface-mountable with standard reflow profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100ACASP#X0, the R5F101ACASP#X0 eliminates data flash overhead and reduces BOM cost where parameter storage is handled externally; versus R5F101AGASP#X0, it trades flash/RAM capacity for lower power and smaller memory footprint in resource-constrained edge nodes.

Availability

R5F101ACASP#X0 is available at Aetrix Electronics and suitable for smart utility metering, industrial sensor nodes, and home appliance control requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for R5F101ACASP#X0 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/G13 family delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and industrial control applications - balancing performance, integration, and energy efficiency without external support components.

FAQ

What is the maximum operating frequency of the R5F101ACASP#X0?

The R5F101ACASP#X0 supports up to 32 MHz operation using the high-speed on-chip oscillator with ±1.0% accuracy across 1.8–5.5 V and -20°C to +85°C. Its minimum instruction execution time is 0.03125 μs at this frequency, delivering 41 DMIPS performance. The core also supports ultra-low-speed operation down to 32.768 kHz for RTC and timing-critical sleep-mode functions.

Does the R5F101ACASP#X0 include data flash memory?

No, the R5F101ACASP#X0 does not include data flash memory. Per Renesas part numbering convention, the "101" prefix explicitly denotes devices without data flash, unlike "100"-series variants (e.g., R5F100ACASP#X0) which integrate 4 KB. This simplifies flash management and reduces cost where EEPROM-like functionality is unnecessary or implemented externally.

Which package type and pin count does the R5F101ACASP#X0 use?

The R5F101ACASP#X0 uses a 30-pin plastic LSSOP package (7.62 mm body, 0.65-mm pitch), identified by the "SP" suffix and "#X0" embossed tape packaging specification. It is JEDEC MS-013AC compliant and shares pin compatibility with other RL78/G13 30-pin LSSOP variants including R5F100ACASP#X0 and R5F101AGASP#X0.

What low-power modes are supported by the R5F101ACASP#X0?

The R5F101ACASP#X0 supports HALT, STOP, and SNOOZE modes. HALT halts the CPU while peripherals remain active; STOP disables the entire system clock except RTC/LVD; SNOOZE allows selected peripherals (e.g., UART, CSI) to operate autonomously while CPU sleeps. STOP mode draws just 0.57 μA - critical for multi-year battery operation in remote sensors.

Can the R5F101ACASP#X0 drive an external crystal oscillator?

No, the R5F101ACASP#X0 relies solely on its on-chip oscillators: a high-speed option (selectable from 1–32 MHz) and a low-speed 32.768 kHz subsystem clock for RTC. It does not support external crystal or ceramic resonator connections - eliminating BOM cost and layout area for timing components while maintaining ±1.0% accuracy across voltage and temperature.