【Texas Instruments】NE556DRE4,IC OSC TIMER DUAL 14-SOIC
【Texas Instruments】NE556DRG4,IC OSC TIMER DUAL 14-SOIC
【STMicroelectronics】NE556DT,IC OSC TIMER DUAL 500KHZ 14SOIC
【Fairchild Semiconductor】NE556DX,计时器和支持产品
【STMicroelectronics】NE556N,IC OSC TIMER DUAL 500KHZ 14DIP
【Texas Instruments】NE556NE4,IC OSC TIMER DUAL 14-DIP
【Texas Instruments】NE556NG4,
NE556NS,PROTOTYPE
