DM54LS283 datasheet(3/8 Pages) NSC

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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

Low to High Level Output

1 R2

tPHL

Propagation Delay Time

C0 to

High to Low Level Output

1 R2

tPLH

Propagation Delay Time

C0 to

Low to High Level Output

tPHL

Propagation Delay Time

C0 to

High to Low Level Output

tPLH

Propagation Delay Time

C0 to

Low to High Level Output

tPHL

Propagation Delay Time

C0 to

High to Low Level Output

tPLH

Propagation Delay Time

Ai or Bi

Low to High Level Output

to Ri

tPHL

Propagation Delay Time

Ai or Bi

High to Low Level Output

to Ri

tPLH

Propagation Delay Time

C0 to

Low to High Level Output

tPHL

Propagation Delay Time

C0 to

High to Low Level Output

tPLH

Propagation Delay Time

Ai or Bi

Low to High Level Output

to C4

tPHL

Propagation Delay Time

Ai or Bi

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

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