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STMicroelectronics STM32L451VCI6 — Microcontrollers & Processors (MCU / MPU / DSP)
STMicroelectronics

STM32L451VCI6 STM32L4 ARM Cortex-M4 MCU, 80 MHz

MPNSTM32L451VCI6
Active

STMicroelectronics STM32L451VCI6, STM32L4 series, ARM Cortex-M4 32-bit MCU, 80 MHz, 256 KB Flash, 160K x 8 RAM, 100-UFBGA, -40 to 85°C, 1.71 V to 3.6 V supply.

$7.3500Ref. price · indicative, final on quote
STM32L451VCI6 datasheet
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Specifications

STM32L451VCI6 Technical Specifications
ParameterValue
SeriesSTM32L4
Mounting typeSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.71V ~ 3.6V
Operating temperature-40°C ~ 85°C (TA)
Speed80MHz
PackageTube
RAM size160K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, PWM, WDT
ConnectivityCANbus, I²C, IrDA, LINbus, MMC/SD, QSPI, SAI, SPI, UART/USART
Number of i (O)83
Core processorARM® Cortex®-M4
Case100-UFBGA
Data convertersA/D 16x12b; D/A 1x12b
Program memory size256KB (256K x 8)

Product details

80 MHz Cortex-M4 in a 7x7 BGA — the low-power workhorse

It is built for applications where active compute throughput and standby current both matter — think sensor fusion nodes, portable medical instruments, and battery-operated industrial loggers. The 100-UFBGA (7x7 mm) package packs 83 I/Os into a 0.5 mm pitch ball grid array. That footprint buys you connectivity options — CANbus, I²C, SPI, UART/USART, QSPI, SAI, and MMC/SD — in a board area that would normally hold a smaller-pin-count LQFP. The trade-off is a multi-layer PCB for fanout and a controlled reflow profile; this is not a two-layer-board part.

256 KB Flash, 160 KB SRAM — sizing the firmware budget

256 KB of Flash gives room for a real-time OS, a TCP/IP stack, and application logic without squeezing into the 128 KB tier. The 160K x 8 SRAM (160 KB) is generous for an MCU in this class — enough to hold two full 800x600 frame buffers or a large protocol buffer without external memory. If your application streams audio or runs a GUI with a framebuffer, this part keeps the BOM single-chip.

For a production BOM, this means you are not forced into a bridge-buy or a redesign cycle.

Supply range and temperature — where it runs

The 1.71 V minimum supply is the key detail for battery-powered designs: the MCU stays operational through the full discharge curve of a Li-ion cell down to 3.0 V nominal, with headroom to 3.6 V for USB-powered or regulated rails.

Frequently asked questions

What is the difference between STM32L451VCI6 and STM32L452VCI6?

The STM32L452VCI6 is a close sibling in the same STM32L4 family, sharing the same 80 MHz Cortex-M4 core, 256 KB Flash, 160 KB SRAM, and 100-UFBGA package. The primary difference is that the STM32L452 includes a full-speed USB 2.0 device interface with crystal-less operation, which the STM32L451 lacks. If your design needs USB connectivity, the STM32L452 is the correct choice; otherwise the STM32L451 is functionally equivalent and typically carries a slightly lower BOM cost.

Can STM32L451VCI6 be used as a replacement for STM32L451VCI5?

The STM32L451VCI6 and STM32L451VCI5 share the same base product number STM32L451 and the same 100-UFBGA package, so they are pin-compatible. The suffix difference typically indicates a temperature grade or packaging variant. Both are active parts in the same family.