M54/74HC690/691 M54/74HC692/693 HC690/692 DECADE C.
ST Microelectronics
M74HC690 - HC691/693 4 BIT BINARY COUNTER/REGISTER
M54/74HC690/691 M54/74HC692/693 HC690/692 DECADE COUNTER/REGISTER (3-STATE) HC691/693 4 BIT BINARY COUNTER/REGISTER (3-STATE) . . . . . . . . HIGH S.
