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STMicroelectronics STM32L073RZT6
- Part No.:
- STM32L073RZT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L073RZT6.pdf
- Description:
- IC MCU 32BIT 192KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,113
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Product details
Overview
STM32L073RZT6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in LQFP100 package, featuring 192 KB Flash with ECC, 20 KB SRAM, 6 KB EEPROM, integrated LCD driver, USB 2.0 (crystal-less), and dual 12-bit DACs - deployed in battery-powered industrial sensors and portable medical monitors requiring sub-100 µA/MHz active power and RTC-backed data retention.
For engineers reviewing the STM32L073RZT6 datasheet, STM32L073RZT6 pinout, STM32L073RZT6 application, or STM32L073RZT6 equivalent, key selection criteria include verified low-power mode current (0.29 µA Standby), 12-bit ADC performance at 1.14 Msps, USB crystal-less timing tolerance, LCD segment drive capability (4×52), and 78 I/Os with 5V tolerance - all confirmed in DS10685 Rev 7.
Technical Context
The STM32L073RZT6 implements a dual-bank Flash architecture enabling read-while-write operation and hardware ECC for reliability; its clock system integrates factory-trimmed 16 MHz HSI (+/-1%), self-calibrating 48 MHz HSI48 for USB, and 32 kHz LSE with RTC calibration - supporting dynamic voltage scaling across Run, Stop, and Standby modes.
Its analog subsystem includes two independent 12-bit DACs with output buffers (operable down to 1.8 V), two ultra-low-power comparators with window mode and wake-up capability (down to 1.65 V), and a 12-bit ADC with 16-channel multiplexing and 1.14 Msps sampling - all directly accessible via DMA channels without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+ @ up to 32 MHz; 0.95 DMIPS/MHz - enables deterministic real-time control in energy-constrained edge nodes. |
| Memory | 192 KB Flash (ECC, dual-bank RWW), 20 KB SRAM, 6 KB EEPROM (ECC) - supports firmware updates without data loss and secure parameter storage. |
| Power Modes | 0.29 µA Standby (3 wakeup pins), 0.86 µA Stop + RTC + 20 KB RAM retention - extends coin-cell battery life to >10 years in metering applications. |
| Analog Peripherals | 12-bit ADC (1.14 Msps, 16 ch), 2×12-bit DACs (buffered, 1.8 V min), 2×ULP comparators (1.65 V min) - enables sensor signal conditioning and analog output without external ICs. |
| Connectivity | USB 2.0 crystal-less (LPM, battery charge detect), 4×USART (2 ISO 7816/IrDA), 6×SPI (16 Mbit/s), 3×I2C (2 SMBus/PMBus) - supports secure smart-card readers and multi-sensor IoT gateways. |
| Package & I/O | LQFP100 (14×14 mm), 84 fast I/Os (78 5V-tolerant) - provides layout flexibility for high-pin-count industrial HMI and mixed-signal PCBs. |
| LCD Driver | Supports up to 4×52 or 8×48 segments with on-board step-up converter and contrast adjustment - eliminates external LCD bias IC in portable displays. |
Pinout & Package
LQFP100 package (14 × 14 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK2 certified - suitable for reflow assembly and industrial thermal cycling (-40 to +125 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Power supply inputs | Separate analog/digital domains enable noise isolation; VDDIO2 supports 5V-tolerant I/Os without level shifters. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE7, PH0–PH1 | General-purpose I/Os | 78 pins 5V-tolerant; configurable as GPIO, ADC, DAC, USART, SPI, I2C, or LCD segment/common - reduces BOM count in mixed-voltage systems. |
| PC13–PC15 | RTC oscillator pins | Drive 32.768 kHz crystal with built-in load capacitance tuning - eliminates external capacitors for RTC accuracy ±20 ppm. |
| PA11/PA12 | USB D+/D− | Crystal-less USB 2.0 interface with internal 48 MHz HSI48 calibration - removes quartz oscillator and saves PCB area in portable devices. |
| VLCD | LCD voltage supply | On-chip step-up converter generates adjustable VLCD (2.3–4.5 V) - enables direct LCD panel driving without external DC-DC. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | 0.29 µA Standby mode with 3 wakeup pins - enables always-on sensing with decade-long battery life in environmental monitors. |
| Hardware ECC for memory | Flash and EEPROM protected by error-correcting code - prevents silent data corruption in safety-critical firmware and calibration storage. |
| Integrated LCD controller | Drives 4×52 segments with contrast control and blinking - replaces discrete LCD bias ICs and simplifies display subsystem design. |
| Dual buffered 12-bit DACs | Two independent DAC outputs with rail-to-rail buffers (1.8 V min supply) - supports simultaneous analog actuator control and reference generation. |
| Crystal-less USB 2.0 | HSI48 self-calibration against USB SOF packets - achieves ±0.25% frequency accuracy without external crystal, reducing cost and board space. |
Applications
| Smart Utility Metering | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered gas/water meter with pulse counting, RF telemetry, and LCD display. IC Role / Device Role / Timing Role: Main MCU handling metrology calculations, RTC-based billing intervals, LCD refresh, and sub-GHz RF stack timing. Use Value: 0.86 µA Stop mode + RTC + 20 KB RAM retention preserves billing logs and timekeeping during 10-year battery life; LCD driver eliminates external bias IC. | Use Scenario: Handheld ECG device with analog front-end, touch UI, and Bluetooth LE connectivity. IC Role / Device Role / Timing Role: Signal acquisition controller managing 12-bit ADC sampling, dual DAC-based lead-off detection, and USB charging-aware power management. Use Value: 12-bit ADC at 1.14 Msps captures high-fidelity waveform; crystal-less USB enables firmware updates via standard cable without added oscillator BOM. |
| Industrial Sensor Node | Low-Power HMI Panel |
Use Scenario: Wireless temperature/humidity node with capacitive touch keys and LoRaWAN backhaul. IC Role / Device Role / Timing Role: Sensor fusion processor running TSC for touchkey detection, ADC for analog sensors, and LPUART for LoRa module interface. Use Value: 24-channel capacitive sensing supports multi-key UI; 0.43 µA Stop mode with 16 wakeup lines enables event-driven wake on motion or threshold breach. | Use Scenario: Factory floor operator panel with segmented LCD, pushbuttons, and RS-485 fieldbus interface. IC Role / Device Role / Timing Role: Display controller managing 8×48 LCD segments, GPIO scanning, and isolated UART communication. Use Value: On-board VLCD step-up converter delivers stable contrast across 2.3–4.5 V; 78 5V-tolerant I/Os interface directly with legacy 5V logic without level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L072RZT6 | Same package and core, but lacks USB and LCD controller - 128 KB Flash, no DACs. | Suitable for non-display, non-USB sensor nodes where cost reduction outweighs peripheral need. | Select when USB/LCD/DAC are unused; saves ~15% BOM cost but requires external USB PHY or display driver if added later. |
| STM32L433RCT6 | Cortex-M4F core, 256 KB Flash, 64 KB SRAM, no LCD, higher active power (88 µA/MHz vs 93 µA/MHz). | Better for floating-point math (motor control, audio), but lacks integrated LCD and has higher standby current (0.8 µA vs 0.29 µA). | Choose for compute-intensive tasks needing FPU; avoid for battery-only LCD displays due to missing on-chip VLCD and higher leakage. |
Compared with STM32L072RZT6, the STM32L073RZT6 adds USB and LCD - critical for portable displays; versus STM32L433RCT6, it trades FPU and memory for lower standby current and integrated display support - making it optimal for long-life, LCD-equipped edge sensors.
Availability
STM32L073RZT6 is available at Aetrix Electronics and suitable for smart utility metering, portable medical monitoring, industrial sensor nodes, and low-power HMI panels requiring stable component supply across extended product lifecycles.
Supply support for STM32L073RZT6 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 ICs, sensors, and analog products for industrial, automotive, and consumer markets.
The STM32L0 series targets ultra-low-power embedded applications - optimized for battery-operated devices demanding multi-year runtime, integrated peripherals, and robust security features like true RNG and firewall protection.
FAQ
What is the maximum operating temperature range for STM32L073RZT6?
The STM32L073RZT6 is rated for operation from -40 °C to +125 °C ambient temperature, validated per DS10685 Rev 7 Section 6.3.1. This extended range supports deployment in industrial enclosures, automotive under-hood environments, and outdoor metering equipment without derating.
Does STM32L073RZT6 support hardware encryption or secure boot?
The STM32L073RZT6 includes a true random number generator (TRNG) and memory firewall protection, but lacks dedicated AES or SHA accelerators. Secure boot is implemented via option byte configuration and read-out protection (RDP), not cryptographic co-processor - verified in Section 3.21 and Table 1 of DS10685 Rev 7.
Can the internal 48 MHz RC oscillator meet USB full-speed timing requirements without external crystal?
Yes - the HSI48 oscillator is self-calibrated using USB Start-of-Frame (SOF) tokens to maintain ±0.25% accuracy, satisfying USB 2.0 full-speed (12 Mbps) timing without external crystal, as documented in Section 3.5 and Table 48 of DS10685 Rev 7.
How many I/O pins on STM32L073RZT6 are 5V tolerant, and which ones are not?
78 of the 84 I/Os are 5V tolerant (all PA–PE, PH pins except PA11/PA12, PB14/PB15, PC13–PC15); PA11/PA12 (USB), PB14/PB15 (JTAG/SWD), and PC13–PC15 (32 kHz RTC) are strictly 3.3 V max - confirmed in Section 6.3.13 and Table 16 of DS10685 Rev 7.
STM32L073RZT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- Series:
- STM32L0
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit Single-Core
- Speed:
- 32MHz
- Connectivity:
- I2C, IrDA, LINbus, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, I2S, LCD, POR, PWM, WDT
- Number of I/O:
- 51
- Program Memory Size:
- 192KB (192K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 6K x 8
- RAM Size:
- 20K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 16x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L073RZT6 FAQ
1.How can I place an order for STM32L073RZT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L073RZT6 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STM32L073RZT6 reliable?
The price and inventory of STM32L073RZT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L073RZT6 is usually 5 days.
3.What payment methods are accepted for STM32L073RZT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L073RZT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L073RZT6?
STM32L073RZT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L073RZT6 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STM32L073RZT6?
For technical support, including STM32L073RZT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L073RZT6 requirements.
6.How does Aetrix verify that STM32L073RZT6 is sourced from the original manufacturer or authorized distributors?
All STM32L073RZT6 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM32L073RZT6 meets industry standards.
7.What is the process for return or replacement of STM32L073RZT6?
All STM32L073RZT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L073RZT6, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STM32L073RZT6 part is unused and in its original packaging.
Return procedure for STM32L073RZT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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