STMicroelectronics STM8L Microcontroller Family

The STM8L microcontroller family, from STMicroelectronics, consists of 26 devices in three lines spanning a broad spectrum of performance and function. The microcontrollers enable engineers to increase the performance and capability of end products while satisfying market-driven requirements such as end-user demands for greener products and longer battery life in portable devices and a variety of medical, industrial, e-metering, sensing or security equipment. The STM8L microcontroller family enables designers to comply with low-power product-design guidelines such as Energy Star, the IEA 1-Watt Plan, or the EU’s EuP directive.

STMicroelectronics STM8L Microcontroller FamilySTM8L Microcontrollers Features

  • STM8 16 MHz CPU
  • 4 to 32 Kbytes of embedded Flash, up to 2 Kbytes of SRAM
  • Three lines: pin-to-pin, software and peripheral compatibility across lines
  • Supply voltage: 1.8 V to 3.6 V (down to 1.65 V at power down)
  • Ultra-low-power modes: down to 350 nA with SRAM and context retention
  • Run mode dynamic consumption down to 150 µA/MHz
  • State-of-the-art digital and analog peripherals
  • Operating temperature range: -40 to +85 °C or up to 125 °C
  • Free touch-sensing library

The three STM8L lines are built on ST’s ultra-low-power technology platform using a dedicated, proprietary 130nm process optimized for ultra-low leakage. Advantages include full CPU performance up to the maximum operating frequency throughout the entire supply voltage (Vdd) range, from 1.65V to 3.6V. In addition, using an on-chip regulator, power consumption is independent of Vdd, thereby providing extra flexibility and simplifying design.

Other features include low-power embedded non-volatile memory and multiple power-management modes — including a 5.4microA Low-Power Run mode, 3.3microA Low-Power Wait mode, 1microA Active Halt with full RTC, and 350nA Halt mode. The device can wake from Halt within 4micros, enabling frequent use of the lowest-power mode. Low-power peripherals including the sub-1microA RTC and Automatic Wake-Up (AWU) unlock further savings. The platform enables dynamic current consumption as low as 150microA/MHz.

The STM8L101 line is the entry point of the STM8L ultra-low-power 8-bit portfolio. The STM8L101 family delivers a high level of integration in an ultra-small footprint, with Flash density up to 8Kbyte and 20-, 28- and 32-pin package options. Family pricing starts with the STM8L101 4Kbyte Flash version in QFN20 3x3mm low-profile package: 10,000-units resale price is $0.68.

The STM8L15x lines (currently sampling) features up to 32Kbytes on-chip Flash, up to 2Kbytes SRAM, external crystal/clock capability, enhanced reset features, and support for Direct Memory Access (DMA). Additional peripherals include a motor-control timer, increased analog capabilities, real-time clock, and fast ADC and DAC functions. On-chip EEPROM with true Read While Write (RWW) capability saves complex and expensive emulation in Flash.

The third line, the STM8L152, also features an integrated LCD controller. The STM8L151 and STM8L152 lines are scheduled for production availability in early 2010.

More information: STMicroelectronics