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54LS283 Datasheet(PDF) 3 Page - National Semiconductor (TI) |
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54LS283 Datasheet(HTML) 3 Page - National Semiconductor (TI) |
3 / 8 page ![]() Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load) From (Input) RL e 2kX Symbol Parameter To (Output) CL e 15 pF CL e 50 pF Units Min Max Min Max tPLH Propagation Delay Time C0 to 24 28 ns Low to High Level Output R 1 R2 tPHL Propagation Delay Time C0 to 24 30 ns High to Low Level Output R 1 R2 tPLH Propagation Delay Time C0 to 24 28 ns Low to High Level Output R 3 tPHL Propagation Delay Time C0 to 24 30 ns High to Low Level Output R 3 tPLH Propagation Delay Time C0 to 24 28 ns Low to High Level Output R 4 tPHL Propagation Delay Time C0 to 24 30 ns High to Low Level Output R 4 tPLH Propagation Delay Time Ai or Bi 24 28 ns Low to High Level Output to Ri tPHL Propagation Delay Time Ai or Bi 24 30 ns High to Low Level Output to Ri tPLH Propagation Delay Time C0 to 17 24 ns Low to High Level Output C4 tPHL Propagation Delay Time C0 to 17 25 ns High to Low Level Output C4 tPLH Propagation Delay Time Ai or Bi 17 24 ns Low to High Level Output to C4 tPHL Propagation Delay Time Ai or Bi 17 26 ns High to Low Level Output to C4 Function Table TLF6421 – 3 H e High Level L e Low Level Note Input conditions at A1 B1 A2 B2 and C0 are used to determine outputs R1 and R2 and the value of the internal carry C2 The values at C2 A3 B3 A4 and B4 are then used to determine outputs R3 R4 and C4 3 |