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STMicroelectronics STM32L053R8T7
- Part No.:
- STM32L053R8T7
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L053R8T7.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,545
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Product details
Overview
STM32L053R8T7 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in LQFP64 package, featuring 64 KB Flash, 8 KB SRAM, 2 KB EEPROM with ECC, integrated LCD driver (8×28 segments), USB 2.0 crystal-less interface, and 12-bit ADC (1.14 Msps) - deployed in battery-powered smart meters and portable medical sensors.
For engineers reviewing the STM32L053R8T7 datasheet, STM32L053R8T7 pinout, STM32L053R8T7 application, or STM32L053R8T7 equivalent, key selection criteria include standby current (0.27 µA), RTC + RAM retention in Stop mode (0.8 µA), 32 MHz max CPU frequency, USB crystal-less operation, and 45 5V-tolerant I/Os for mixed-voltage system interfacing.
Technical Context
The STM32L053R8T7 integrates a Cortex-M0+ core with MPU, supporting dynamic voltage scaling across three power ranges (1.65–3.6 V) and five low-power modes - including Standby with two wake-up pins and Stop mode with 16 wake-up lines. Its clock system combines HSI16 (±1%), LSE (32 kHz RTC), MSI (65 kHz–4.2 MHz), and PLL for flexible timing control.
Analog subsystem includes dual ultra-low-power comparators (down to 1.65 V), 12-bit DAC with output buffer (operable down to 1.8 V), and temperature sensor with factory calibration. The LCD controller supports on-board step-up conversion and contrast adjustment - enabling direct drive of segmented displays without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M0+, 32-bit, up to 32 MHz - delivers 0.95 DMIPS/MHz for deterministic real-time control in energy-constrained systems. |
| Memory | 64 KB Flash (with ECC), 8 KB SRAM, 2 KB EEPROM (with ECC) - enables firmware updates, data logging, and parameter storage with error resilience. |
| Low-Power Performance | 0.27 µA Standby, 0.4 µA Stop, 0.8 µA Stop+RTC+8KB RAM - extends battery life to >10 years in coin-cell-powered applications. |
| Analog Peripherals | 12-bit ADC (16 ch, 1.14 Msps), 12-bit DAC (1 ch, buffered), 2x comparators - supports precision sensor signal acquisition and analog output generation at 1.65 V min supply. |
| Communication | 1x USB 2.0 (crystal-less), 3x USART/LPUART, 4x SPI, 2x I2C - enables direct USB connectivity without external crystal and robust multi-protocol peripheral interfacing. |
| Display Support | LCD driver for up to 8×28 segments with on-chip step-up converter and blinking mode - eliminates external bias generator in portable display designs. |
| Package | LQFP64 (10×10 mm, 0.5 mm pitch) - provides full I/O access (51 fast I/Os, 45 5V-tolerant) and thermal performance suitable for industrial PCB layouts. |
Pinout & Package
LQFP64 (10×10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, ECOPACK2 certified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains: VDD powers digital/analog peripherals; VSS reference for all I/Os and internal circuits. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD12, PH0–PH1 | General-purpose I/O | 51 total I/Os; 45 support 5V tolerance - simplifies level-shifting in mixed-voltage systems (e.g., interfacing with 5V sensors). |
| PA11/PA12 | USB D+/D− | Crysal-less USB 2.0 interface - eliminates need for external 48 MHz crystal and reduces BOM cost and board space. |
| PC13–PC15 | RTC oscillator inputs | Supports 32.768 kHz external crystal for precise real-time clock with calibration - critical for time-stamped metering and alarm functions. |
| VLCD | LCD voltage supply | On-chip step-up converter generates adjustable VLCD (2.3–3.3 V) - enables direct LCD segment driving without external charge pump. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power standby | 0.27 µA with two wake-up pins active - enables rapid response to external events while preserving multi-year battery life. |
| Crystal-less USB | Integrated 48 MHz HSI48 oscillator with USB clock recovery system (CRS) - achieves ±0.25% accuracy without external crystal, reducing component count by one. |
| Embedded EEPROM | 2 KB data EEPROM with ECC and 100k write cycles - stores calibration data, device IDs, or configuration parameters with guaranteed integrity over lifetime. |
| Capacitive sensing | 24-channel touch sensing controller (TSC) supporting touchkey, linear, and rotary sensors - enables intuitive HMI in wearables and handheld devices without external ICs. |
| True RNG | Hardware random number generator compliant with NIST SP800-90B - provides entropy source for secure boot, key generation, and cryptographic operations. |
Applications
| Smart Utility Metering | Portable Medical Sensors |
|---|---|
Use Scenario: Battery-operated gas/water meters with hourly pulse logging, tamper detection, and RF transmission. IC Role / Device Role / Timing Role: Main system controller managing sensor acquisition, EEPROM-based event logging, RTC-timestamped data, and LPUART-to-LoRaWAN gateway communication. Use Value: 0.4 µA Stop mode + RTC ensures accurate timekeeping and wake-up for scheduled reads; 2 KB EEPROM retains tamper logs across power loss. | Use Scenario: Wearable ECG patch with real-time analog front-end, Bluetooth LE telemetry, and 7-day battery life. IC Role / Device Role / Timing Role: Signal processor running ADC-sampled ECG algorithm, driving OLED via SPI, and managing BLE connection intervals using LPTIM. Use Value: 12-bit ADC (1.14 Msps) captures high-fidelity waveform; 0.8 µA Stop+RTC+RAM retains context during sleep between measurements. |
| Industrial Panel Displays | Asset Tracking Beacons |
Use Scenario: DIN-rail mounted HMI with 4-digit LCD, pushbutton interface, and Modbus RTU over RS-485. IC Role / Device Role / Timing Role: Display controller handling 8×28-segment LCD drive, capacitive touch decoding, and isolated UART communication. Use Value: On-chip VLCD step-up converter eliminates external DC-DC; 45 5V-tolerant I/Os interface directly with RS-485 transceivers and tactile switches. | Use Scenario: GPS-enabled logistics tag reporting location every 6 hours using cellular NB-IoT modem. IC Role / Device Role / Timing Role: System manager coordinating GPS fix acquisition, modem power sequencing, and deep-sleep scheduling via RTC alarm. Use Value: 3.5 µs wake-up from RAM allows immediate sensor/modem activation; 0.27 µA Standby minimizes quiescent drain during 6-hour idle periods. |
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 |
|---|---|---|---|
| STM32L073RZT6 | 192 KB Flash, 20 KB RAM, no LCD driver, adds AES-128 and SHA-256 crypto accelerators | Suitable for secure firmware OTA updates and encrypted sensor data transmission - not for LCD-based UIs | Select when security features outweigh display integration needs and larger memory is required. |
| STM32L433RCT6 | Cortex-M4F core, 256 KB Flash, 64 KB SRAM, no EEPROM, higher active current (81 µA/MHz) | Better for floating-point DSP tasks (e.g., FFT-based vibration analysis), but lacks EEPROM and ultra-low standby current | Choose when computational throughput > 1.2 DMIPS/MHz is needed and battery life >5 years is not mandatory. |
Compared with STM32L073RZT6 and STM32L433RCT6, the STM32L053R8T7 uniquely balances sub-µA standby, integrated LCD, and EEPROM in a cost-optimized LQFP64 footprint - making it optimal for long-life, display-centric, resource-constrained edge nodes.
Availability
STM32L053R8T7 is available at Aetrix Electronics and suitable for smart metering, portable diagnostics, industrial HMIs, and asset tracking requiring stable component supply and long-term lifecycle assurance.
Supply support for STM32L053R8T7 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, sensors, and analog products for industrial, automotive, and consumer markets.
The STM32L0 series targets ultra-low-power embedded applications - emphasizing energy efficiency, integrated peripherals (LCD, USB, EEPROM), and extended temperature operation (-40 to +125 °C) for harsh environments.
FAQ
What is the minimum operating voltage for the STM32L053R8T7's ADC and DAC?
The 12-bit ADC operates down to 1.65 V supply, maintaining full 1.14 Msps sampling rate and linearity. The 12-bit DAC functions with buffered output down to 1.8 V - verified per DS10152 Rev 10 Section 6.3.16. Both peripherals retain specified accuracy across the full 1.65–3.6 V range, enabling reliable analog measurement in brownout conditions.
Does the STM32L053R8T7 support USB without an external crystal?
Yes - it integrates a factory-trimmed 48 MHz HSI48 oscillator and Clock Recovery System (CRS) that locks to USB SOF packets, achieving ±0.25% accuracy required for full-speed USB 2.0. This eliminates the need for a 48 MHz crystal or external oscillator, confirmed in Section 3.19.5 and Table 46 of DS10152 Rev 10.
How many I/O pins are 5V tolerant, and which ones support USB functionality?
45 of the 51 I/Os are 5V tolerant, including all GPIOs except those dedicated to USB (PA11/PA12), SWD (PA13/PA14), and oscillator inputs (PC14/PC15). PA11 and PA12 serve as USB D+ and D− with built-in ESD protection and differential signaling - they are not 5V tolerant and must be isolated from 5V logic.
What is the endurance rating of the embedded EEPROM, and how is data integrity ensured?
The 2 KB EEPROM supports 100,000 write/erase cycles and 20-year data retention at 85 °C, with hardware ECC applied on every read/write operation. Section 6.3.51 of DS10152 Rev 10 specifies single-bit error correction and double-bit error detection - ensuring bit-level reliability without software overhead or external redundancy schemes.
STM32L053R8T7 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, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, I2S, LCD, POR, PWM, WDT
- Number of I/O:
- 51
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.65V ~ 3.6V
- Data Converters:
- A/D 16x12b; D/A 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L053R8T7 FAQ
1.How can I place an order for STM32L053R8T7 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L053R8T7 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 STM32L053R8T7 reliable?
The price and inventory of STM32L053R8T7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L053R8T7 is usually 5 days.
3.What payment methods are accepted for STM32L053R8T7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L053R8T7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L053R8T7?
STM32L053R8T7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L053R8T7 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 STM32L053R8T7?
For technical support, including STM32L053R8T7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L053R8T7 requirements.
6.How does Aetrix verify that STM32L053R8T7 is sourced from the original manufacturer or authorized distributors?
All STM32L053R8T7 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 STM32L053R8T7 meets industry standards.
7.What is the process for return or replacement of STM32L053R8T7?
All STM32L053R8T7 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L053R8T7, 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 STM32L053R8T7 part is unused and in its original packaging.
Return procedure for STM32L053R8T7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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