74F242 Просмотр технического описания (PDF) - Philips Electronics
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74F242 Datasheet PDF : 10 Pages
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Philips Semiconductors
Transceivers
Product specification
74F242/74F243
AC ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Propagation delay
An, Bn to Bn, An
Output Enable time
to High or Low level
Output Disable time
from High or Low level
Propagation delay
An, Bn to Bn, An
Output Enable time
to High or Low level
Output Disable time
from High or Low level
AC WAVEFORMS
For all waveforms, VM = 1.5V.
74F242
74F243
TEST
CONDITION
Waveform
NO TAG
Waveform 3
Waveform 4
Waveform 3
Waveform 4
Waveform 2
Waveform 3
Waveform 4
Waveform 3
Waveform 4
LIMITS
VCC = +5V
Tamb = +25°C
CL = 50pF, RL = 500Ω
MIN TYP MAX
VCC = +5V ± 10%
Tamb = 0°C to +70°C
CL = 50pF, RL = 500Ω
MIN
MAX
2.5
3.5
6.0
2.5
7.0
2.0
3.0
4.5
2.0
4.5
3.0
4.0
7.0
3.0
8.0
3.5
6.5
9.0
3.5
10.5
3.5
5.5
8.5
3.5
9.0
3.5
6.0
9.5
3.5
11.0
2.5
4.0
5.2
2.0
6.2
2.5
4.0
5.2
2.0
6.5
2.0
4.5
5.7
2.0
6.7
2.0
5.0
7.5
2.0
8.5
2.0
4.0
6.0
2.0
7.0
2.0
4.5
6.0
2.0
7.0
UNIT
ns
ns
ns
ns
ns
ns
An, Bn
VM
tPHL
VM
tPLH
Bn, An
VM
VM
SF00773
Waveform 1. For Inverting Outputs
An, Bn
VM
tPLH
VM
tPHL
Bn, An
VM
VM
SF00202
Waveform 2. For Non-Inverting Outputs
OEA
OEB
An, Bn
VM
tPZH
VM
tPLZ
VM
VOH –0.3V
0V
SF00775
Waveform 3. 3-State Output Enable Time to High Level and
Output Disable Time from High Level
OEA
OEB
An, Bn
VM
tPZL
VM
tPLZ
VM
VOL +0.3V
SF00776
Waveform 4. 3-State Output Enable Time to Low Level and
Output Disable Time from Low Level
1990 Aug 30
6
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