STMicroelectronics STM32L071C8T7

Overview

STM32L071C8T7 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in LQFP32 package, featuring 192 KB Flash, 20 KB SRAM, 6 KB EEPROM with ECC, 12-bit ADC (1.14 Msps), and operation from 1.65 V to 3.6 V across -40 °C to +125 °C. It delivers 0.95 DMIPS/MHz performance and supports 78 5V-tolerant I/Os - ideal for battery-powered industrial sensors and portable medical monitors.

For engineers reviewing the STM32L071C8T7 datasheet, STM32L071C8T7 pinout, STM32L071C8T7 application, or STM32L071C8T7 equivalent, key selection criteria include standby current (0.29 µA), RTC-enabled Stop mode (0.86 µA), 5 µs Flash wakeup time, and integrated ultra-low-power comparators with wake-up capability down to 1.65 V.

Technical Context

The STM32L071C8T7 implements a dual-bank Flash architecture with read-while-write capability and hardware ECC, enabling robust firmware updates without halting execution. Its power management includes five BOR thresholds, programmable voltage detector (PVD), and dynamic voltage scaling to optimize active-mode efficiency.

Timing subsystem integrates multiple clock sources: 32 kHz LSE for RTC calibration, 16 MHz HSI16 factory-trimmed RC (±1%), and PLL for CPU clock generation up to 32 MHz. The interconnect matrix routes peripherals-including four USARTs (two ISO 7816/IrDA-capable), three I2C (two SMBus/PMBus), and six SPI-to memory and DMA independently.

Key Specifications

Pinout & Package

LQFP32 package with 32-pin quad flat lead frame, 7 × 7 mm body, 0.8 mm pitch, and exposed thermal pad (EP). RoHS-compliant, ECOPACK2 certified.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power MCU applications.

Compared with STM32L072C8T7, the STM32L071C8T7 trades hardware security for lower unit cost and identical ultra-low-power performance; versus STM32L031K6T6, it delivers 6× more Flash, EEPROM persistence, and dual comparators - justifying its use in feature-rich, long-lifecycle industrial endpoints.

Availability

STM32L071C8T7 is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, industrial temperature sensor nodes, and asset tracking beacons requiring stable component supply across extended product lifecycles.

Supply support for STM32L071C8T7 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and analog products for industrial, automotive, and consumer markets.

The STM32L0 series targets ultra-low-power embedded applications demanding sub-1 µA standby, rich analog integration, and long-term reliability - optimized for battery-operated IoT endpoints and energy-constrained industrial controls.

FAQ

What is the maximum operating frequency and core type of the STM32L071C8T7?

The STM32L071C8T7 features an Arm Cortex-M0+ core rated for up to 32 MHz operation, delivering 0.95 DMIPS/MHz. It supports dynamic voltage scaling to maintain performance across 1.65–3.6 V supply range, with factory-trimmed 16 MHz HSI oscillator (±1%) and PLL for precise clock generation - validated in DS10690 Rev 7 Section 3.3 and Table 4.

Does the STM32L071C8T7 support hardware encryption or secure boot features?

No, the STM32L071C8T7 does not include hardware AES, TRNG, or secure boot engines. These features are present in the pin-compatible STM32L072C8T7 variant. The L071 relies on software-based cryptography and standard boot modes (system memory, main Flash, or SRAM) - confirmed in Section 3.9 and Table 2 of DS10690 Rev 7.

How many I/O pins are 5V tolerant, and what is the maximum count on the LQFP32 package?

All 25 GPIO pins on the LQFP32 package (PA0–PA15, PB0–PB1, PC13–PC15, NRST, BOOT0) are 5V tolerant except PC13–PC15 and NRST. The full device supports up to 78 5V-tolerant I/Os across larger packages, but LQFP32 implements 22 such pins - specified in Section 3.7 and Table 15 of DS10690 Rev 7.

What is the guaranteed data retention period for the 6 KB EEPROM?

The integrated 6 KB data EEPROM guarantees 100,000 write/erase cycles and 20-year data retention at 55 °C (or 40 years at 25 °C), with hardware ECC for bit-error correction - documented in Section 6.3.9 (Table 51–52) and Section 3.8 of DS10690 Rev 7.