STM8S005C6T6 — 32 KB Flash STM8 Value Line MCU in LQFP-48 for Multi-Function Drone BMS and PDB Controllers

The STM8S005C6T6 is the LQFP-48 variant of the STM8S005 Value Line Enhanced family — featuring 32 KB Flash, 2 KB SRAM, and 38 GPIOs on an STM8 core at 16 MHz. The 48-pin package with 0.5 mm pitch provides maximum I/O density for the S005 subfamily, enabling comprehensive multi-motor ESC control, full-featured BMS with direct cell-balancing MOSFET drive, intelligent PDB with per-channel current sensing, and multi-channel LED strip drivers — all from a single cost-optimized MCU.

Part Number Decoded — Field by Field

Quick Specifications

Product Overview

The STM8S005C6T6 in LQFP-48 provides the largest GPIO count (38 pins) in the STM8 Value Line Enhanced subfamily. This package is the natural choice when a drone BMS or PDB design needs to interface with multiple analog sensors, drive MOSFETs directly, and communicate with external peripherals — all from a single MCU without external GPIO expanders or multiplexers.

In drone applications, the LQFP-48 enables 4-channel independent ESC current monitoring, 6S cell voltage scanning, 4× temperature sensor inputs, and 2× UART channels on one chip. For advanced BLHeli_S designs, it can control dual motors (12 gate-drive PWM channels) plus LED strips and status indicators simultaneously. The 0.5 mm pitch LQFP-48 remains hand-solderable for prototyping while being fully production-ready for automated SMT assembly.

Key Features & Benefits

38 GPIOs — Maximum I/O for the STM8S005 Family

With 38 5V-tolerant GPIOs, the C6 variant can handle: 6× MOSFET gate-drive PWM channels, 8× ADC sensor inputs (current ×4, voltage ×2, temperature ×2), 2× UART (FC telemetry + debug), 4× LED strip data lines, and 10+ GPIOs for status LEDs, buzzer, and button inputs — all on one chip without external I/O expansion.

10-Channel 10-Bit ADC with LQFP-48 Connectivity

Unlike smaller packages where ADC channels share pins with digital functions, the LQFP-48 package exposes all 10 ADC channels on dedicated analog-capable pins — enabling simultaneous connection of up to 10 analog sensors without conflicts. This is ideal for per-ESC current monitoring on 4-in-1 PDBs.

LQFP-48 — Production-Ready with Hand-Solder Option

The 0.5 mm pitch LQFP-48 is the sweet spot for drone PCB designers: small enough for compact boards (7×7 mm body), but with lead spacing that allows hand-soldering for prototypes and small batches. Reflow-compatible with standard SAC305 lead-free profiles.

Target Applications

4-in-1 ESC with Integrated PDB Telemetry

A single STM8S005C6T6 monitors 4 independent ESC channels (phase current, FET temperature, supply voltage) while aggregating telemetry for transmission to the flight controller. The 38 GPIOs provide enough I/O for all 4 channels plus UART communication and LED status indicators.

6S Drone BMS Monitor & Cell Balancer

Directly scans 6 series cell voltages via 10-bit ADC through a resistive divider ladder, controls cell-balancing MOSFETs via GPIO, monitors charge/discharge current through a shunt amplifier, and communicates pack status to the flight controller over UART or I²C. Ideal for DIY FPV drone Li-Ion packs.

Comprehensive PDB with OSD Telemetry

Combines 4-channel ESC current sensing, main battery voltage/current monitoring, BEC output supervision, and WS2812B LED strip control into a single-chip PDB controller — providing all the power telemetry data needed for Betaflight/iNav OSD elements.

Frequently Asked Questions

Is the LQFP-48 STM8S005C6T6 worth the extra cost over LQFP-32 STM8S005K6T6?

Only if your design needs more than 25 GPIOs. The C6's 38 GPIOs vs. the K6's 25 GPIOs is the primary differentiator — Flash, SRAM, and all peripherals are identical. For a standard BLHeli_S ESC that only needs 6 PWM + 1 UART + 2 ADC, the K6 is sufficient. Choose the C6 when your design adds current sensors per ESC channel, multiple temperature inputs, and LED strip outputs — features that collectively exceed the K6's pin budget.

Can the STM8S005C6T6 replace two STM8S003F3P6 chips?

Yes, in certain architectures. One STM8S005C6T6 can replace two STM8S003F3P6 chips if your design consolidates functions (e.g., dual-motor ESC control or ESC + PDB telemetry on one chip). However, in a 4-in-1 ESC, using four independent STM8S003s (one per motor) is architecturally simpler and more fault-tolerant — a single MCU failure only disables one motor, not the entire ESC.

Ordering Information

Design Resources

• Datasheet (DS7276): STM8S005K6 / STM8S005C6 — Complete specs with LQFP-48 pinout, PCB land pattern, and thermal data.

• Reference Manual (RM0016): STM8S Series — Register-level documentation for all peripherals.

• Bluejay GitHub: mathiasvr/bluejay — Open-source ESC firmware with full STM8S target support.

• Application Note AN2860: EMC guidelines for STM8 — Layout recommendations for LQFP-48 in high-noise motor-drive environments.

Request a Quote

SUPERB Automation supplies genuine STMicroelectronics STM8S005C6T6 LQFP-48 MCUs with full traceability and batch-level QA documentation. For drone BMS and PDB designs that need maximum I/O in the STM8S005 family, the 48-pin C6 variant delivers 38 GPIOs with 32 KB Flash — a single-chip solution for multi-sensor power distribution and monitoring. 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.