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54LS283 Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. 54LS283
Description  4-Bit Binary Adders with Fast Carry
Download  8 Pages
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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54LS283 Datasheet(HTML) 3 Page - National Semiconductor (TI)

   
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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


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