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전자부품 반도체 검색엔진( 무료 PDF 다운로드 ) - 데이터시트뱅크

SN74LS243D 데이터 시트보기 (PDF) - Motorola => Freescale

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SN74LS243D
Motorola
Motorola => Freescale Motorola
SN74LS243D Datasheet PDF : 5 Pages
1 2 3 4 5
SN54/74LS242 SN54/74LS243
AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V)
Limits
LS242
LS243
Symbol
Parameter
Min Typ Max Min Typ Max Unit
tPLH
tPHL
Propagation Delay, Data to Output
9.0 14
12 18
12 18
12 18
ns
tPZH
Output Enable Time to HIGH Level
15 23
15 23
ns
tPZL
Output Enable Time to LOW Level
20 30
20 30
ns
tPLZ
Output Disable Time from LOW Level
15 25
15 25
ns
tPHZ
Output Disable Time from HIGH Level
10 18
10 18
ns
Test Conditions
CL = 45 pF,
RL = 667
CL = 5.0 pF,
RL = 667
AC WAVEFORMS
VIN
1.3 V
tPLH
VOUT
1.3 V
1.3 V
tPHL
1.3 V
Figure 1
VIN
1.3 V
tPHL
VOUT
1.3 V
1.3 V
tPLH
1.3 V
Figure 2
TO OUTPUT
UNDER TEST
VCC
RL
SW1
5 k
CL*
SW2
VE
VE
VOUT
1.3 V
1.3 V
tPZL
1.3 V
tPLZ
1.3 V
0.5 V
VOL
Figure 3
VE
VE
VOUT
1.3 V
tPZH
1.3 V
1.3 V
tPHZ
VOH
1.3 V
0.5 V
Figure 4
SWITCH POSITIONS
SYMBOL
tPZH
tPZL
tPLZ
tPHZ
SW1
Open
Closed
Closed
Closed
SW2
Closed
Open
Closed
Closed
Figure 5
FAST AND LS TTL DATA
5-395

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