SL74LS245 Ver la hoja de datos (PDF) - System Logic Semiconductor

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SL74LS245

Octal 3-State Noninverting Bus Transceiver

System Logic Semiconductor 

SL74LS245

Note 1: Not more thanone 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 Time, Low-to-High Level

Output (from A or B to Output)

12

ns

tPHL Propagation Delay Time, High-to-Low Level CL = 45 pF,

Output (from A or B to Output)

RL = 667 Ω

tPZH Output Enable Time to High Level (from OE

to Output)

12

ns

40

ns

tPZL Output Enable Time to Low Level (from OE

to Output)

40

ns

tPHZ Output Disable Time from High Level

(from OE to Output)

tPLZ Output Disable Time from Low Level

(from OE to Output)

CL = 5 pF

RL = 667 Ω

25

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

SLS

System Logic

Semiconductor

NOTES A. CL includes probe and jig capacitance.

B. All diodes are 1N916 or 1N3064.

Figure 4. Test Circuit

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