300KHZ -5V/ADJ INVERTING, NEGATIVE OUTPUT CURRENT MODE PWM REGULATOR 5V High-Speed RS-232 Transceivers with 0.1uF Capacitors ST92F124/ST92F150/ST92F250 - 8/16-BIT SINGLE VOLTAGE FLASH MCU FAMILY WITH RAM, E3 TM(EMULATED EEPROM), CAN 2.0B AND J1850 BLPD 3.3V Step down current mode PWM DC-DC converters 中断控制 Interrupt Controller 中断控制