SN54178

The SN54178 is a kind of shift register which utilizes fully D-C coupled storage elements and features synchronous parallel inputs and parallel outputs.Paralle loading is accomplished by taking the shift input low, applying the four bits of data, and taking the load input high.

Features of of the SN54178 are:(1)typical maximum clock frequency is 39 MHz; (2)three operating modes: synchronous paralle load; right shift; hold(do nothing); (3)negative-edge-triggered clocking; (4)D-C counpling symplifies system designs.

The absolute maximum ratings of the SN54178 can be summarized as:(1): supply voltage, vcc is 7 V ; (2): input voltage is 5.5 V; (3): storage temperature range is -65 to 150;(4): operating free-air temeprature range is -55 to 125.