The KA7541 from Fairchild Semiconductor is a fluorescent light ballast controller Integrated Circuit in an 8-DIP package, with a 44 to 56 kHz operating range and an attribute value of No.
The KA7541D from Fairchild Semiconductor is a fluorescent light ballast controller Integrated Circuit in an 8-SOIC package, with a 44 to 56 kHz operating range and an attribute value of No.
The KA7541DTF from Fairchild Semiconductor is a fluorescent light ballast controller Integrated Circuit in an 8-SOIC package, with a 44 to 56 kHz operating range and an attribute value of No.