Part # 54LS74 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: 54LS74 DM54LS74A Dual Positive-Edge-Triggered D Flip-Flops with Preset, Clear and Complementary Outputs

Part Details:

D 54LS74DM54LS74ADM74LS74A Flip-Flops June 1989 54LS74 DM54LS74A DM74LS74A with Dual Positive-Edge-Triggered D Flip-Flopswith Preset Clear and Complementary Outputs Preset General DescriptionThis device contains two independent positive-edge-trig- violated A low logic level on the preset or clear inputs will gered D flip-flops with complementary outputs The informa- set or reset the outputs regardless of the logic levels of the tion on the D input is accepted by the flip-flops on the posi- other inputs tive going edge of the clock pulse The triggering occurs at a Clear voltage level and is not directly related to the transition time Features of the rising edge of the clock The data on the D input may Y Alternate military aerospace device (54LS74) is avail- be changed while the clock is low or high without affecting able Contact a National Semiconductor Sales Office the outputs as long as the data setup and hold times are not Distributor for specifications and Dual Connection Diagram Complementary Dual-In-Line Package Positive-Edge-Triggered Outputs TL F 6373 ­ 1 Order Number 54LS74DMQB 54LS74FMQB 54LS74LMQB DM54LS74AJ DM54LS74AW DM74LS74AM or DM74LS74AN See NS Package Number E20A J14A M14A N14A or W14B Function Table Inputs Outputs PR CLR CLK D Q Q L H X X H L H L X X

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54LS74.pdf Datasheet