Renesas R5F11B7CGNA#20

Overview

R5F11B7CGNA#20 from Renesas is a 24-pin HWQFN-packaged RL78/G1F 16-bit microcontroller with 32 KB flash, 4 KB data flash, and 5.5 KB RAM. It operates from 1.6 V to 5.5 V, achieves ultra-low power consumption (66 μA/MHz active, 0.57 μA in RTC+LVD STOP mode), and integrates 8-channel 10-bit ADC, 1-channel 8-bit DAC, 2 comparators, 1 PGA, and 9×16-bit timers - deployed in battery-powered industrial sensor nodes requiring long-life operation and analog signal conditioning.

For engineers reviewing the R5F11B7CGNA#20 datasheet, R5F11B7CGNA#20 pinout, R5F11B7CGNA#20 application, or R5F11B7CGNA#20 equivalent, key selection criteria include its 24-pin HWQFN (4 × 4 mm, 0.5 mm pitch) package, −40 to +105°C industrial temperature grade, 32 KB code flash with self-programming and security lock, and integrated analog peripherals enabling single-chip sensor interface solutions without external signal chain components.

Technical Context

The R5F11B7CGNA#20 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and configurable instruction execution time (0.03125 μs at 32 MHz high-speed on-chip oscillator or 30.5 μs at 32.768 kHz subsystem clock). Its power management includes HALT, STOP, and SNOOZE modes, plus on-chip POR and 14-level LVD with interrupt/reset selection.

Analog subsystem integration includes an 8-channel 10-bit ADC (VDD-referenced, internal 1.45 V reference, temperature sensor), 1-channel 8-bit DAC (0–VDD output, real-time update), dual comparators (selectable internal/external reference), and a programmable gain amplifier - all accessible via dedicated pins mapped to P00–P22 and P147 in the 24-pin HWQFN layout.

Key Specifications

Pinout & Package

Package: 24-pin plastic HWQFN (4 × 4 mm, 0.5 mm pitch) with exposed die pad; requires 0.47–1 μF capacitor between REGC and VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F11B7EGNA#20, the R5F11B7CGNA#20 trades flash capacity for lower cost and smaller footprint; versus R5F11BBCGNA#20, it offers identical analog functionality in a space-constrained 24-pin form factor ideal for ultra-compact industrial modules.

Availability

R5F11B7CGNA#20 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostats, and programmable logic relays requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F11B7CGNA#20 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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G1F product line delivers true low-power 16-bit MCUs optimized for cost-sensitive industrial and consumer applications requiring robust analog integration, extended temperature operation, and ultra-low standby current.

FAQ

What is the maximum operating frequency of the R5F11B7CGNA#20?

The R5F11B7CGNA#20 supports up to 32 MHz CPU operation using the high-speed on-chip oscillator. At this frequency, minimum instruction execution time is 0.03125 μs. External crystal oscillation (X1/X2) supports up to 20 MHz main system clock, while the subsystem clock runs at 32.768 kHz for RTC functions. All timing specifications are validated across the −40 to +105°C industrial temperature range.

Does the R5F11B7CGNA#20 support in-circuit debugging?

Yes, the R5F11B7CGNA#20 includes an on-chip debug function compatible with Renesas E2 emulator and CS+ IDE. Debug access uses the TOOL0, TOOLRxD, and TOOLTxD pins in the 24-pin HWQFN package. However, Renesas advises against using the debug function in mass-produced end products due to potential flash endurance impact from repeated programming cycles during development.

What analog peripherals are integrated into the R5F11B7CGNA#20?

The R5F11B7CGNA#20 integrates an 8-channel 10-bit ADC with internal 1.45 V reference and on-chip temperature sensor, a 1-channel 8-bit DAC with 0–VDD output and real-time update, two comparators (IVCMP0/IVCMP1) with selectable internal/external reference, and one programmable gain amplifier (PGA). These are accessible via dedicated pins including P00–P22 and P147 in the 24-pin layout.

Is the R5F11B7CGNA#20 pin-compatible with other RL78/G1F variants?

The R5F11B7CGNA#20 shares the same 24-pin HWQFN (4 × 4 mm, 0.5 mm pitch) package and pinout with all other R5F11B7x-series devices, including R5F11B7EGNA#20. This enables direct substitution where increased flash capacity is not required. Pin compatibility does not extend to 32-pin or larger RL78/G1F variants like R5F11BBCGNA#20 due to differing pin counts and I/O allocations.

What power supply decoupling is required for the R5F11B7CGNA#20?

The R5F11B7CGNA#20 requires a 0.47–1 μF capacitor between the REGC pin and VSS to stabilize the internal voltage regulator - this is mandatory per Renesas design guidelines. Additionally, standard 0.1 μF ceramic decoupling capacitors should be placed near each VDD pin, and the exposed die pad must be soldered to a solid VSS plane for optimal thermal dissipation and noise immunity.