Cypress offers USB and low voltage wireless MCUs

The MCUs offer up to 32kbyte of flash memory, three 16-bit timers and up to 36 general purpose I/Os (GPIOs) to accommodate enhanced multimedia features in human interface devices (HIDs).
 
The in-system reprogrammable enCoRe V and enCoRe V LV MCUs have a 10-bit ADC, flash memory with EEPROM emulation, and small form-factor packages.

The  enCoRe V devices also include eight USB endpoints. The enCoRe V LV family operates between 1.7V and 3.6V, with low power consumption for prolonged battery life in wireless
applications, especially when paired with Cypress’s low-power WirelessUSB LP 2.4-GHz radio.

All enCoRe MCUs include Cypress’s patented crystal-less oscillator and integrated pull-up resistor to reduce component count and BOM cost.