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74F757 bảng dữ liệu(PDF) 7 Page - NXP Semiconductors

tên linh kiện 74F757
Giải thích chi tiết về linh kiện  Octal inverter buffer open-collector
PDF  12 Pages
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nhà sản xuất  PHILIPS [NXP Semiconductors]
Trang chủ  http://www.nxp.com
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74F757 bảng dữ liệu(HTML) 7 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
74F756/74F757/74F760
Buffers
1989 Nov 27
7
AC ELECTRICAL CHARACTERISTICS
LIMITS
Tamb = +25°C
Tamb = 0°C to +70°C
SYMBOL
PARAMETER
TEST
VCC = +5.0V
VCC = +5.0V ± 10%
UNIT
CONDITION
CL = 50pF, RL = 500Ω
CL = 50pF, RL = 500Ω
MIN
TYP
MAX
MIN
MAX
tPLH
tPHL
Propagation delay
Ian, Ibn to Yn
74F756
Waveform 1, 2
8.5
1.0
11.0
3.0
14.0
6.0
8.5
1.0
15.0
6.5
ns
tPLH
tPHL
Propagation delay
OEn to Yn
74F756
Waveform 1, 2
9.0
5.0
11.5
7.0
14.5
10.0
9.0
4.5
15.0
10.5
ns
tPLH
tPHL
Propagation delay
Ian, Ibn to Yn
74F757
Waveform 1, 2
7.5
3.0
10.5
5.5
13.5
8.5
7.5
3.0
14.0
9.0
ns
tPLH
tPHL
Propagation delay
OEa or OEb to Yn
74F757
Waveform 1, 2
9.0
4.5
10.5
7.0
15.0
10.0
8.5
4.0
16.0
10.5
ns
tPLH
tPHL
Propagation delay
Ian, Ibn to Yn
74F760
Waveform 1, 2
7.5
3.5
10.0
5.5
13.5
8.5
7.5
3.0
14.0
9.0
ns
tPLH
tPHL
Propagation delay
OEn to Yn
74F760
Waveform 1, 2
9.5
5.0
11.5
7.0
14.5
10.5
9.0
4.5
15.0
10.5
ns
AC WAVEFORMS
For all waveforms, VM = 1.5V.
Ian, Ibn, OEn
VM
VM
VM
VM
tPLH
tPHL
Yn
SF01256
Waveform 1. Propagation Delay for Inverting Outputs
Ian, Ibn,
OEa, OEb
VM
VM
VM
VM
tPHL
tPLH
Yn
SF01257
Waveform 2. Propagation Delay for Non-invertIng Outputs
TYPICAL PROPAGATION DELAYS VERSUS LOAD FOR OPEN COLLECTOR OUTPUTS
0
100
200
300
400
500
600
18
16
14
12
10
8
6
4
2
0
LOAD RESISTOR (
W)
PROPAGATION
DELAY (ns)
tPLH
tPHL
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 500
W 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.



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