74F280PC PDF даташит
Спецификация 74F280PC изготовлена «Fairchild» и имеет функцию, называемую «9-Bit Parity Generator/Checker». |
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Детали детали
Номер произв | 74F280PC |
Описание | 9-Bit Parity Generator/Checker |
Производители | Fairchild |
логотип |
5 Pages
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April 1988
Revised August 1999
74F280
9-Bit Parity Generator/Checker
General Description
The F280 is a high-speed parity generator/checker that
accepts nine bits of input data and detects whether an
even or an odd number of these inputs is HIGH. If an even
number of inputs is HIGH, the Sum Even output is HIGH. If
an odd number is HIGH, the Sum Even output is LOW. The
Sum Odd output is the complement of the Sum Even out-
put.
Ordering Code:
Order Number Package Number
Package Description
74F280SC
M14A
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow
74F280SJ
M14D
14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74F280PC
N14A
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbols
Connection Diagram
IEEE/IEC
© 1999 Fairchild Semiconductor Corporation DS009512
www.fairchildsemi.com
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Unit Loading/Fan Out
Pin Names Description
I0–I8
∑O
∑E
Data Inputs
Odd Parity Output
Even Parity Output
U.L.
HIGH/LOW
1.0/1.0
50/33.3
50/33.3
Input IIH/IIL
Output IOH/IOL
20 µA/−0.6 mA
−1 mA/20 mA
−1 mA/20 mA
Truth Table
H = HIGH Voltage Level
L = LOW Voltage Level
Number of
HIGH Inputs
I0–I8
0, 2, 4, 6, 8
1, 3, 5, 7, 9
Outputs
∑ Even
∑ Odd
HL
LH
Logic Diagram
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
www.fairchildsemi.com
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Absolute Maximum Ratings(Note 1)
Storage Temperature
−65°C to +150°C
Ambient Temperature under Bias
−55°C to +125°C
Junction Temperature under Bias
−55°C to +150°C
VCC Pin Potential to Ground Pin
Input Voltage (Note 2)
−0.5V to +7.0V
−0.5V to +7.0V
Input Current (Note 2)
−30 mA to +5.0 mA
Voltage Applied to Output
in HIGH State (with VCC = 0V)
Standard Output
3-STATE Output
−0.5V to VCC
−0.5V to +5.5V
Current Applied to Output
in LOW State (Max)
twice the rated IOL (mA)
ESD Last Passing Voltage (Min)
4000V
Recommended Operating
Conditions
Free Air Ambient Temperature
Supply Voltage
0°C to +70°C
+4.5V to +5.5V
Note 1: Absolute maximum ratings are values beyond which the device
may be damaged or have its useful life impaired. Functional operation
under these conditions is not implied.
Note 2: Either voltage limit or current limit is sufficient to protect inputs.
DC Electrical Characteristics
Symbol
Parameter
Min
Typ
Max
Units
VCC
Conditions
VIH
VIL
VCD
VOH
VOL
IIH
IBVI
ICEX
VID
IOD
IIL
IOS
ICCH
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH
Voltage
Output LOW
Voltage
10% VCC
5% VCC
10% VCC
Input HIGH
Current
Input HIGH Current
Breakdown Test
Output HIGH
Leakage Current
Input Leakage
Test
Output Leakage
Circuit Current
Input LOW Current
Output Short-Circuit Current
Power Supply Current
2.0
2.5
2.7
4.75
−60
V Recognized as a HIGH Signal
0.8 V
Recognized as a LOW Signal
−1.2 V Min IIN = −18 mA
V Min IOH = −1 mA
IOH = −1 mA
0.5 V Min IOL = 20 mA
5.0 µA Max VIN = 2.7V
7.0 µA Max VIN = 7.0V
50 µA Max VOUT = VCC
V 0.0 IID = 1.9 µA
All Other Pins Grounded
3.75
µA
0.0 VIOD = 150 mV
All Other Pins Grounded
−0.6 mA Max VIN = 0.5V
−150 mA Max VOUT = 0V
25 38 mA Max VO = HIGH
AC Electrical Characteristics
Symbol
Parameter
tPLH Propagation Delay
tPHL
In to ∑E
tPLH Propagation Delay
tPHL
In to ∑O
TA = +25°C
VCC = +5.0V
CL = 50 pF
Min Typ Max
6.5
10.0
15.0
6.5 11.0 16.0
6.0
10.0
15.0
6.5 11.0 16.0
TA = −55°C to +125°C
VCC = 5.0V
CL = 50 pF
Min Max
6.5 20.0
6.5 21.0
5.0 20.0
6.5 21.0
TA = 0°C to +70°C
VCC = 5.0V
CL = 50 pF
Min Max
6.5 16.0
6.5 17.0
6.0 16.0
6.5 17.0
Units
ns
ns
3 www.fairchildsemi.com
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