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74LS244

Octal 3-State Noninverting Buffer/Line Driver/Line Receiver

System Logic Semiconductor 

SL74LS244

note 1: Not more than one output should be shorted at a time, and duration of the short-circuit should not exceed

one second

AC ELECTRICAL CHARACTERISTICS (TA = 25°C, VCC = 5.0 V, tr = 15 ns,

tf = 6.0 ns)

Symbol

Parameter

Test Condition

Min

Max

Unit

tPLH Propagation Delay, Data to

Output

18

ns

tPHL Propagation Delay, Data to

Output

CL = 45 pF,

RL = 667 Ω

18

ns

tPZH Output Enable Time

23

ns

tPZL

Output Enable Time

30

ns

tPHZ Output Disable Time

tPLZ

Output Disable Time

CL = 5 pF

RL = 667 Ω

18

ns

25

ns

Figure 1. Switching Waveforms

(See Figure 3)

tPZL - S1 closed, S2 opened

tPZH- S1 opened, S2 closed

tPLZ, tPHZ - S1 and S2 closed

Figure 2. Switching Waveforms

(See Figure 4)

NOTES A. CL includes probe and jig capacitance.

B. All diodes are 1N916 or 1N3064.

Figure 3. Test Circuit

NOTES A. CL includes probe and jig capacitance.

B. All diodes are 1N916 or 1N3064.

Figure 4. Test Circuit

SLS

System Logic

Semiconductor

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