N74F1240D 查看數據表（PDF） - Philips Electronics
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N74F1240D Datasheet PDF : 10 Pages
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Philips Semiconductors
Buffers
Product specification
74F1240, 74F1241*
AC ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
tPLH
Propagation delay
tPHL
Ian, Ibn, to Yn
tPZH
Output Enable time
tPZL
to High or Low level
tPHZ
Output Disable time
tPLZ
to High or Low level
tPLH
Propagation delay
tPHL
Ian, Ibn, to Yn
tPZH
Output Enable time
tPZL
to High or Low level
tPHZ
Output Disable time
tPLZ
to High or Low level
74F1240
74F1241
TEST
CONDITION
Waveform 1
Waveform 3
Waveform 4
Waveform 3
Waveform 4
Waveform 2
Waveform 3
Waveform 4
Waveform 3
Waveform 4
LIMITS
Tamb = +25°C
VCC = +5.0V
CL = 50pF, RL = 500Ω
Tamb = 0°C to +70°C
VCC = +5.0V ± 10%
CL = 50pF, RL = 500Ω
MIN TYP MAX
MIN
MAX
3.0
4.5
6.5
2.5
7.5
1.5
2.5
4.5
1.5
5.0
3.0
5.5
7.5
3.0
8.0
4.0
7.0
9.0
4.0
9.5
2.0
4.0
6.0
2.0
6.5
2.0
4.0
5.5
2.0
6.0
2.5
4.0
5.5
2.5
6.0
2.5
5.0
6.5
2.5
7.0
3.0
5.5
7.0
3.0
7.5
3.0
6.5
8.0
3.0
8.5
3.0
5.5
7.5
3.0
8.5
3.0
6.0
8.0
3.0
8.5
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
AC WAVEFORMS
For all waveforms, VM = 1.5V.
Ian, Ibn VM
tPHL
VM
tPLH
Yn
VM
VM
SF00328
Waveform 1. For Inverting Outputs
OEn
OEb
Yn, Yn
VM
tPZH
VM
tPHZ
VM
VOH -0.3V
0V
SF00330
Waveform 3. 3-State Output Enable Time to High Level and
Output Disable Time from High Level
Ian, Ibn
VM
tPLH
VM
tPHL
Yn
VM
VM
SF00329
Waveform 2. For Non-inverting Outputs
OEn
OEb
Yn, Yn
VM
tPZL
VM
tPLZ
VM
3.5V
VOL +0.3V
SF00331
Waveform 4. 3-State Output Enable Time to Low Level and
Output Disable Time from Low Level
* Discontinued part. Please see the Discontinued Products List.
1999 Jan 08
6
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