The MSP430x1xx Series is the basic generation without an embedded LCD controller. They are generally smaller than the '3xx generation. These Flash or ROM based Ultra-Low Power MCUs offer 8 MIPS, 1.8–3.6 V operation, up to 60 KB Flash, and a wide range of high-performance analog and intelligent digital peripherals.
The MSP430F2xx Series are similar to the '1xx generation, but operate at even lower power, support up to 16 MHz operation, and have a more accurate (±2%) on-chip clock that makes it easier to operate without an external crystal. These Flash-based Ultra-Low Power offer 1.8–3.6 V operation. Includes the Very-Low power Oscillator (VLO), internal pull-up/pull-down resistors, and low-pin count options.
The MSP430G2xx Value Series features flash-based Ultra-Low Power MCUs up to 16 MIPS with 1.8–3.6 V operation. Includes the Very-Low power Oscillator (VLO), internal pull-up/pull-down resistors, and low-pin count options, at lower prices than the MSP430F2xx series.
The MSP430x3xx Series is the oldest generation, designed for portable instrumentation with an embedded LCD controller. This also includes a frequency-locked loop oscillator that can automatically synchronize to a low-speed (32 kHz) crystal. This generation does not support EEPROM memory, only mask ROM and UV-eraseable and one-time programmable EPROM. Later generations provide only flash ROM and mask ROM options. These devices offer 2.5–5.5 V operation, up to 32 KB ROM.
The MSP430x4xx Series are similar to the '3xx generation, and also include an integrated LCD controller, but are larger and more capable. These Flash or ROM based devices offers 8–16 MIPS at 1.8–3.6 V operation, with FLL, and SVS. Ideal for low power metering and medical applications.
The MSP430x5xx Series are able to run up to 25 MHz, have up to 256 kB flash memory and up to 16 kB RAM. This new Flash-based family features the lowest active power consumption with up to 25 MIPS at 1.8-3.6 V operation (165 uA/MIPS). Includes an innovative Power Management Module for optimal power consumption. Many devices feature integrated USB.