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74273 Folha de dados(PDF) 3 Page - ON Semiconductor

Nome de Peças 74273
Descrição Electrónicos  LOW POWER SCHOTTKY
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Fabricante Electrônico  ONSEMI [ON Semiconductor]
Página de início  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

74273 Folha de dados(HTML) 3 Page - ON Semiconductor

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SN74LS273
http://onsemi.com
3
FUNCTIONAL DESCRIPTION
The SN74LS273 is an 8-Bit Parallel Register with a
common Clock and common Master Reset.
When the MR input is LOW, the Q outputs are LOW,
independent of the other inputs. Information meeting the
setup and hold time requirements of the D inputs is
transferred to the Q outputs on the LOW-to-HIGH transition
of the clock input.
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
VIH
Input HIGH Voltage
2.0
V
Guaranteed Input HIGH Voltage for
All Inputs
VIL
Input LOW Voltage
0.8
V
Guaranteed Input LOW Voltage for
All Inputs
VIK
Input Clamp Diode Voltage
– 0.65
– 1.5
V
VCC = MIN, IIN = – 18 mA
VOH
Output HIGH Voltage
2.7
3.5
V
VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
VO
Output LOW Voltage
0.25
0.4
V
IOL = 4.0 mA
VCC = VCC MIN,
VIN =VIL or VIH
VOL
Output LOW Voltage
0.35
0.5
V
IOL = 8.0 mA
VIN = VIL or VIH
per Truth Table
I
Input HIGH Current
20
µA
VCC = MAX, VIN = 2.7 V
IIH
Input HIGH Current
0.1
mA
VCC = MAX, VIN = 7.0 V
IIL
Input LOW Current
– 0.4
mA
VCC = MAX, VIN = 0.4 V
IOS
Short Circuit Current (Note 1)
–20
– 100
mA
VCC = MAX
ICC
Power Supply Current
27
mA
VCC = MAX
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V)
Limits
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
fMAX
Maximum Input Clock Frequency
30
40
MHz
Figure 1
tPHL
Propagation Delay, MR to Q Output
18
27
ns
Figure 2
tPLH
tPHL
Propagation Delay, Clock to Output
17
18
27
27
ns
Figure 1
AC SETUP REQUIREMENTS (TA = 25°C, VCC = 5.0 V)
Limits
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
tw
Pulse Width, Clock or Clear
20
ns
Figure 1
ts
Data Setup Time
20
ns
Figure 1
th
Hold Time
5.0
ns
Figure 1
trec
Recovery Time
25
ns
Figure 2


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