SN54LS78A

The SN54LS78A includes two negative-edge-triggered flip-flops with individual J-K, preset inputs, and common clock and common clear inputs. The logic levels at the J and K inputs of SN54LS78A may be accepted to change when the clock pulse is high and the flip-flop will perform according to the function tables as long as minimum setup and hold times are obs erved.

Features of SN54LS78A are: (1)package options include plastic" small outline" package,flat package, and plastic and ceramic DIPs; (2)dependable texas instrument quality and reliability.

The absolute maximum ratings and recommeded operating conditions of the SN54LS78A can be summarized as: (1)supply voltage: 7V; (2)input voltage: 7V;(3)operating free air temperature range:-55 to 125; (4)storage tempera ture rang:-65 to 150. Recommended operating conditions: (1)supply voltage: 4.5V min, 5V typ and 5.5V max; (2)high-level input voltage: 2V min; (3)low-level input voltage: 0.7V max; (4)high-level output current:-0.4 max; (5)low-level output current: 4mA max; (6)clock frequency: 0MHz min and 30MHz max; (7)pulse duration: 20ns min, etc.