74F757 Ver la hoja de datos (PDF) - Philips Electronics
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74F757 Datasheet PDF : 12 Pages
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Philips Semiconductors
Buffers
Product specification
74F756/74F757/74F760
AC ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
tPLH
Propagation delay
tPHL
Ian, Ibn to Yn
tPLH
Propagation delay
tPHL
OEn to Yn
tPLH
Propagation delay
tPHL
Ian, Ibn to Yn
tPLH
Propagation delay
tPHL
OEa or OEb to Yn
tPLH
Propagation delay
tPHL
Ian, Ibn to Yn
tPLH
Propagation delay
tPHL
OEn to Yn
74F756
74F757
74F760
TEST
CONDITION
Waveform 1, 2
Waveform 1, 2
Waveform 1, 2
Waveform 1, 2
Waveform 1, 2
Waveform 1, 2
LIMITS
Tamb = +25°C
VCC = +5.0V
CL = 50pF, RL = 500Ω
MIN TYP MAX
Tamb = 0°C to +70°C
VCC = +5.0V ± 10%
CL = 50pF, RL = 500Ω
MIN
MAX
8.5 11.0 14.0
8.5
15.0
1.0
3.0
6.0
1.0
6.5
9.0 11.5 14.5
9.0
15.0
5.0 7.0 10.0
4.5
10.5
7.5 10.5 13.5
7.5
14.0
3.0
5.5
8.5
3.0
9.0
9.0 10.5 15.0
8.5
16.0
4.5 7.0 10.0
4.0
10.5
7.5 10.0 13.5
7.5
14.0
3.5
5.5
8.5
3.0
9.0
9.5 11.5 14.5
9.0
15.0
5.0 7.0 10.5
4.5
10.5
UNIT
ns
ns
ns
ns
ns
ns
AC WAVEFORMS
For all waveforms, VM = 1.5V.
Ian, Ibn, OEn VM
tPHL
VM
tPLH
Yn
VM
VM
SF01256
Waveform 1. Propagation Delay for Inverting Outputs
Ian, Ibn,
OEa, OEb
VM
tPLH
VM
tPHL
Yn
VM
VM
SF01257
Waveform 2. Propagation Delay for Non-invertIng Outputs
TYPICAL PROPAGATION DELAYS VERSUS LOAD FOR OPEN COLLECTOR OUTPUTS
18
16
14
tPLH
12
10
PROPAGATION
DELAY (ns)
tPHL
8
6
4
2
0
0
100
200
300
400
500
600
LOAD RESISTOR (W)
SF01258
NOTE:
When using open-collector parts, the value of the pull-up resistor greatly affects the value of the tPLH. For example, changing the pull-up resistor
value from 500W to 100W will improve the tPLH up to 50% with only slight increase in the tPHL. However, if the pull-up resistor is changed, the
user must make certain that the total IOL current through the resistor and the total IIL’s of the receivers do not exceed the IOL maximum
specification.
1989 Nov 27
7
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