Texas Instruments NE555PWE4
Renesas Electronics Corporation NE5550979A-T1A-A
CEL NE5550779A-EV09-A
California Eastern Laboratories (CEL) NE5550779A-EV04-A
California Eastern Laboratories (CEL) NE5550979A-EV09-A
California Eastern Laboratories (CEL) NE5550234-EV04-A
California Eastern Laboratories (CEL) NE5550234
Texas Instruments NE555DG4