STMicroelectronics
Ultra-low-power Arm Cortex-M4 MCU, 80 MHz, 512 KB Flash, 160 KB SRAM, USB FS, LQFP64
The STM32L452RET6 is an ultra-low-power STM32L4 microcontroller built on an 80 MHz Arm Cortex-M4 core with FPU and DSP instructions, 512 KB Flash and 160 KB SRAM, crystal-less USB 2.0 full-speed, CAN 2.0B, Quad-SPI and a 5 Msps 12-bit ADC in a 10 x 10 mm LQFP64 package. It is widely designed into battery-powered industrial sensors, metering, medical devices and IoT gateways. Lead time currently runs around 52 weeks and authorized stock is constrained, so allocation and alternative sourcing should be planned early. Cerametronics helps buyers locate traceable stock.
Key Specifications
Verify against the original datasheet before quoting.
| Core / Speed | Arm Cortex-M4 with FPU, MPU, DSP instructions; up to 80 MHz |
|---|---|
| Memory | 512 KB Flash (single bank); 160 KB SRAM incl. 32 KB with hardware parity |
| Interfaces | USB 2.0 FS (crystal-less), 1x CAN 2.0B, 3x USART + 1x UART + 1x LPUART, 3x SPI, 1x Quad-SPI, 4x I2C (FM+), 1x SAI, SDMMC; 12-bit 5 Msps ADC |
| Supply Voltage | 1.71 V to 3.6 V (internal LDO); 1.05 V to 1.32 V on VDD12 with external SMPS |
| Package | LQFP64, 10 x 10 x 1.4 mm (suffix T) |
| Temperature | Grade 6: -40 to +85 °C ambient (TJ up to +105 °C); grade 3 variant: -40 to +125 °C ambient |
Market Status
Allocation Advised – Extended Factory Lead Time Factory lead time is currently around 52 weeks.
Quality & Traceability
Cerametronics is ISO 9001 certified and products are RoHS compliant, with counterfeit screening and full traceability on every shipment. A Certificate of Conformance is available on request. For allocation-sensitive or high-risk lots, independent third-party lab verification can be arranged — just flag it on your RFQ. Any lot that fails incoming inspection is quarantined and never shipped.
FAQ
What do the suffixes in STM32L452RET6 / RET3 / RET6TR / RET6P mean?
R = 64 pins, E = 512 KB Flash, T = LQFP, 6 = -40 to +85 °C ambient grade, 3 = -40 to +125 °C grade. TR denotes tape-and-reel packing (same die and package as the tray part). The P suffix (STM32L452RET6P) is configured for an external SMPS supply on VDD12 and is not a direct drop-in for the standard part without board changes.
Are there pin-compatible alternatives if STM32L452RET6 is unavailable?
STM32L452RCT6 (256 KB Flash, same pinout) and STM32L462RET6 (same device plus AES hardware encryption) are the closest substitutes; STM32L432/L433 in LQFP64 share the core and footprint but have less Flash/SRAM and fewer peripherals, so firmware memory maps must be checked. UFBGA64 and WLCSP64 versions are the same silicon but need a different PCB footprint.
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