STM8L052R8T6 — 64 KB Flash Ultra-Low-Power STM8L MCU in LQFP-64 for Comprehensive Drone BMS and Sensor Hubs

The STM8L052R8T6 is the largest STM8L052 Value Line device, featuring 64 KB Flash, 4 KB SRAM, 256 bytes EEPROM, and ultra-low-power operation (0.35 µA Halt) in a spacious LQFP-64 package. With 54 GPIOs, a 28-channel 12-bit ADC, 12-bit DAC, dual USARTs, SPI, and I²C, this MCU is purpose-built for comprehensive 14S–16S drone BMS controllers, large-scale sensor aggregation hubs, and battery-powered drone payload controllers requiring maximum analog channel density and I/O count in the STM8L Value Line.

Part Number Decoded — Field by Field

Quick Specifications

Product Overview

The STM8L052R8T6 in LQFP-64 is the maximum-configuration STM8L Value Line device. With 64 KB Flash — double the L052C6 — it accommodates complex firmware with dual-bank update capability. The 54 GPIOs and 28-channel 12-bit ADC enable direct monitoring of up to 14 series LiPo cells without analog multiplexing, plus multiple temperature sensors, current sensors, and spare analog inputs — making it the ideal single-chip solution for high-cell-count drone BMS.

The LQFP-64 package (10×10 mm) provides enough I/O to combine BMS cell monitoring, pack current sensing, charge/discharge FET control, temperature monitoring, and communication interfaces — all on one chip. For large industrial drones using 12S–16S battery configurations, the R8T6 eliminates the need for external ADC multiplexers, I/O expanders, and secondary monitoring MCUs.

Key Features & Benefits

28-Channel 12-Bit ADC — Direct 14S Cell Monitoring

With 28 analog input channels, the R8T6 can directly monitor: 14 series cell voltages, pack current, 6 temperature sensors, 2 reference voltages, and 4 spare inputs — building a complete high-cell-count BMS without any external analog multiplexing ICs. Each channel achieves 0.8 mV resolution at 3.3V reference.

64 KB Flash + 4 KB SRAM — Dual-Bank BMS Firmware

The 64 KB Flash supports dual-bank firmware for safe field updates: one 32 KB bank runs the BMS application while the other receives an update. The 4 KB SRAM buffers cell voltage histories and runtime statistics for detailed battery health (SOH) analysis.

54 GPIOs in LQFP-64 — Maximum I/O in STM8L052 Family

Fifty-four GPIO pins provide enough I/O to control charge/discharge MOSFETs, cell-balancing FETs, status LEDs, buzzer, and communication peripherals — all from a single LQFP-64 chip without external I/O expansion.

Target Applications

14S–16S Heavy-Lift Drone BMS Controller

Monitors all 14–16 series cells, pack current, 6 temperature zones, and controls charge/discharge protection FETs. Reports cell-level telemetry at 10 Hz to the flight controller via USART or I²C. The 64 KB Flash stores battery identity, cycle history, and calibration data for the battery's lifetime.

Drone Sensor Hub with 28 Analog Inputs

Aggregates up to 28 analog sensor channels plus I²C digital sensors — ideal for agricultural drones with multiple environmental sensors, structural health monitoring on large UAVs, and research platforms requiring extensive data collection.

Battery-Powered Autonomous Payload Controller

Manages sensors, actuators, and communication on a battery-powered drone payload that must operate for extended periods independently of the main flight battery. The 0.35 µA Halt mode enables months-long autonomous operation with periodic wake-and-sample cycles.

Frequently Asked Questions

STM8L052R8T6 vs. STM8L151C8T6 — key differences?

L052R8T6: 64 KB Flash, 4 KB SRAM, 256 bytes EEPROM, 54 GPIOs, 28 ADC channels, LQFP-64, no DMA. L151C8T6: 64 KB Flash, 4 KB SRAM, 2 KB EEPROM, 41 GPIOs, 25 ADC channels, LQFP-48, has DMA. Choose the R8 for maximum I/O and ADC channels (64-pin package); choose the C8 for a more compact design (48-pin) with DMA and larger EEPROM. The R8's main advantage is the 64-pin package's massive I/O count.

Can a single STM8L052R8T6 handle a complete 16S BMS?

Yes. The 28 ADC channels are sufficient for 16 cell voltages + 1 pack current + 4 temperature sensors + 2 reference voltages + 5 spare — a full 16S BMS can be built on a single R8T6 without external ADCs. However, for 16S you must ensure the cumulative voltage on the ADC pins does not exceed VDD+0.3V, which requires careful resistor divider design.

Ordering Information

Design Resources

• Datasheet: STM8L052R8 — Ultra-low-power MCU with 64 KB Flash, LQFP-64 package mechanical and electrical data.
• Reference Manual (RM0031): STM8L05x/15x — Complete register documentation.
• Application Note AN3262: STM8L Low-Power Modes — Power optimization guide.
• STM8CubeMX: Pinout configurator for LQFP-64 with ADC channel mapping.

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SUPERB Automation supplies genuine STMicroelectronics STM8L052R8T6 ultra-low-power MCUs with full traceability and batch-level QA documentation. With 28-channel 12-bit ADC, 64 KB Flash, and 54 GPIOs in LQFP-64, the STM8L052R8T6 is the ultimate single-chip solution for high-cell-count drone BMS and multi-sensor aggregation — all at 0.35 µA sleep current. Whether you need prototype quantities for ESC firmware development or production volumes for drone BMS and PDB controller manufacturing, we source through verified channels with competitive lead times. Contact us with your target quantity, delivery date, and any special packaging or marking requirements — we'll respond with a detailed quotation within 24 hours.