STM32L1 Series 

STM32L1 series of ultra-low-power MCUs
ST’s Arm® Cortex®-M3-based STM32L1 series uses ST’s proprietary ultra-low-leakage process technology with an innovative autonomous dynamic voltage scaling and 5 low-power modes offering unprecedented platform flexibility to fit any application. The STM32L1 series extends the ultra-low-power concept with no compromise on performance.
As for the STM32L0 and STM8L, the STM32L1 offers dynamic voltage scaling, an ultra-low-power clock oscillator, LCD interface, comparator, DAC and hardware encryption.
More than just ultra-low-power MCUs, the STM32L1 series offers a wide portfolio of features, memory sizes and package pin counts. Combining ultra-low power and performance, the portfolio covers from 32 to 512 Kbytes of Flash memory (with up to
80 Kbytes of SDRAM and 16 Kbytes of true embedded EEPROM) and from 48 to 144 pins.
This innovative architecture (voltage scaling, ultra-low-power MSI oscillator) gives your design more performance for a very low power budget. The large number of embedded peripherals, such as USB, LCD interface, op amp, comparators, ADC with fast on/off mode, DAC, capacitive touch and AES, makes the STM32L1 series an expandable platform to fit all your requirements.
The series is available in 4 different lines: STM32L100 Value line, STM32L151, STM32L152 (LCD), STM32L162 (LCD and AES-128).
To simplify migration and give you all the flexibility you need, the STM32L1 is pin-to-pin compatible with the different STM32F series and opens the door to the full STM32 ecosystem.
Ultra-low-power mode: 280 nA with backup registers (3 wakeup pins)
Ultra-low-power mode + RTC: 900 nA with backup registers (3 wakeup pins)
Low-power run mode: down to 9 μA
Dynamic run mode: down to 177 μA/MHz

 
http://www.st.com/content/st_com/en/products/microcontrollers/stm32-32-bit-arm-cortex-mcus/stm32-ultra-low-power-mcus/stm32l1-series.html?querycriteria=productId=SS1295








STM32L151/152 LCD 

The STM32L151/152 devices extend the ultra-low-power concept with no compromise on performance, using the Cortex-M3 core and a flexible CPU clock from 32 kHz up to 32 MHz. As well as the dynamic run and low-power run modes, two additional ultra-low-power modes bring you very low power consumption while keeping an RTC, backup register content and low-voltage detector.
The STM32L151/152 devices are designed for medical, industrial and consumer applications and feature an onboard fast
12-bit 1 MSPS ADC, USB 2.0 FS and capacitive touch sensing. You may extend the memory range using the SDIO and FSMC interfaces.
To reduce application cost and design, the STM32L151/152 offer an integrated LCD driver with up to 8 x 40 segments.
The STM32L151/152 portfolio offers from 32 to 512 Kbytes of Flash and from 48- to 144-pin packages.

 
http://www.st.com/content/st_com/en/products/microcontrollers/stm32-32-bit-arm-cortex-mcus/stm32-ultra-low-power-mcus/stm32l1-series/stm32l151-152.html?querycriteria=productId=LN962