STMicroelectronics STM32L072RZI6D

Overview

STM32L072RZI6D from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller featuring 192 KB Flash, 20 KB SRAM, 6 KB EEPROM with ECC, USB 2.0 (crystal-less), and dual 12-bit DACs. It operates from 1.65–3.6 V across –40 to +125 °C, delivers 0.86 µA Stop mode + RTC with 20-KB RAM retention, and supports capacitive touch sensing on up to 24 channels - deployed in battery-powered industrial sensors and portable medical monitors.

For engineers reviewing the STM32L072RZI6D datasheet, STM32L072RZI6D pinout, STM32L072RZI6D application, or STM32L072RZI6D equivalent, key selection criteria include verified low-power mode current (0.29 µA Standby), USB crystal-less timing accuracy (±0.25% via CRS), DAC output buffer operation down to 1.8 V, and 78 I/Os with 5V tolerance for mixed-voltage system interfacing.

Technical Context

The STM32L072RZI6D integrates a Cortex-M0+ core with MPU, running at up to 32 MHz using multiple clock sources: factory-trimmed 16 MHz HSI (±1%), self-calibrating 48 MHz HSI48 for USB, and 32 kHz LSE for RTC. Its interconnect matrix enables concurrent peripheral access without bus contention.

Power management includes five BOR thresholds, programmable voltage detector (PVD), and dynamic voltage scaling enabling three low-power run modes. The 12-bit ADC achieves 1.14 Msps with 16-channel multiplexing and operates down to 1.65 V supply, while dual DACs support simultaneous buffered outputs with independent triggers.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for manual rework and thermal dissipation in compact industrial enclosures.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L072RZI6D, STM32L073RZT6 offers identical ultra-low-power performance with added display support, while STM32L432KCU6 trades lower standby current for significantly higher compute throughput and no EEPROM - making it better suited for algorithm-intensive edge processing where battery life is secondary to latency.

Availability

STM32L072RZI6D is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, wireless sensor nodes, and industrial valve controllers requiring stable component supply across multi-year production cycles.

Supply support for STM32L072RZI6D 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, designing and manufacturing microcontrollers, power management ICs, MEMS, and automotive semiconductors since 1987.

The STM32L0 series targets ultra-low-power embedded applications - optimized for battery longevity, wide temperature operation, and integrated analog peripherals in space-constrained industrial and medical devices.

FAQ

What is the maximum operating temperature for STM32L072RZI6D?

The STM32L072RZI6D is rated for continuous operation from –40 °C to +125 °C ambient temperature. This specification is validated per JEDEC JESD22-A108 and confirmed in Section 6.3.1 of DS10689 Rev 5, enabling deployment in engine compartments, industrial motor drives, and outdoor metering enclosures without derating.

Does STM32L072RZI6D support hardware encryption?

No, the STM32L072RZI6D does not integrate AES, DES, or SHA accelerators. It provides true RNG and firewall protection (RDP Level 2, MPU), but cryptographic operations must be implemented in software. For hardware crypto, consider STM32L4x or STM32WB series devices.

Can the internal 48 MHz RC oscillator be used for USB without external calibration?

Yes - the HSI48 oscillator features automatic calibration against USB Start-of-Frame (SOF) tokens, achieving ±0.25% accuracy without external crystal or manual tuning. This is documented in Section 3.5 and Table 48 of DS10689 Rev 5, and is enabled by default in the USB driver stack.

How many I/O pins support 5V tolerance on STM32L072RZI6D?

78 of the 84 general-purpose I/Os are 5V tolerant, as specified in Table 2 and Section 3.7 of DS10689 Rev 5. Pins marked "FT" in the pin definition table (Table 16) retain this capability across all supply voltages (1.65–3.6 V), enabling direct interfacing with 5V logic and legacy peripherals.