74F821SC PDF даташит
Спецификация 74F821SC изготовлена «Fairchild» и имеет функцию, называемую «10-Bit D-Type Flip-Flop». |
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Детали детали
Номер произв | 74F821SC |
Описание | 10-Bit D-Type Flip-Flop |
Производители | Fairchild |
логотип |
6 Pages
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April 1988
Revised August 1999
74F821
10-Bit D-Type Flip-Flop
General Description
The 74F821 is a 10-bit D-type flip-flop with 3-STATE true
outputs arranged in a broadside pinout.
Features
s 3-STATE Outputs
Ordering Code:
Order Number Package Number
Package Description
74F821SC
M24B
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74F821SPC
N24C
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-100, 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 DS009595
www.fairchildsemi.com
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Unit Loading/Fan Out
Pin Names
D0–D9
OE
CP
O0–O9
Description
Data Inputs
Output Enable
3-STATE Input
Clock Input
3-STATE Outputs
U.L.
HIGH/LOW
1.0/1.0
1.0/1.0
Input IIH/IIL
Output IOH/IOL
20 µA/−0.6 mA
20 µA/−0.6 mA
1.0/1.0
20 µA/−0.6 mA
150/40 (33.3) −3.0 mA/24 mA (20 mA)
Functional Description
The 74F821 consists of ten D-type edge-triggered flip-
flops. This device has 3-STATE true outputs for bus sys-
tems organized in a broadside pinning. The buffered Clock
(CP) and buffered Output Enable (OE) are common to all
flip-flops. The flip-flops will store the state of their individual
D inputs that meet the setup and hold times requirements
on the LOW-to-HIGH CP transition. With the OE LOW the
content of the flip-flops are available at the outputs. When
the OE is HIGH, the outputs go to the high impedance
state. Operation of the OE input does not affect the state of
the flip-flops.
Function Table
Inputs
OE CP
HH
HL
H
H
L
L
LH
LL
D
X
X
L
H
L
H
X
X
Internal Output
QO
Function
NC Z Hold
NC Z Hold
H Z Load
L Z Load
H L Data Available
L H Data Available
NC NC No Change in Data
NC NC No Change in Data
L = LOW Voltage Level
H = HIGH Voltage Level
X = Immaterial
Z = High Impedance
= LOW-to-HIGH Transition
NC = No Change
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.
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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)
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 Input HIGH Voltage
2.0
VIL Input LOW Voltage
VCD Input Clamp Diode Voltage
VOH Output HIGH
10% VCC
2.5
Voltage
10% VCC
2.4
5% VCC
2.7
5% VCC
2.7
VOL Output LOW
Voltage
10% VCC
IIH Input HIGH Current
V Recognized as a HIGH Signal
0.8 V
Recognized as a LOW Signal
−1.2 V Min IIN = −18 mA
IOH = −1 mA
V Min IOH = −3 mA
IOH = −1 mA
IOH = −3 mA
0.5 V Min IOL = 24 mA
5.0 µA Max VIN = 2.7V
IBVI
ICEX
VID
IOD
IIL
IOZH
IOZL
IOS
ICCZ
Input HIGH Current
Breakdown Test
Output HIGH
Leakage Current
Input Leakage
Test
Output Leakage
Circuit Current
Input LOW Current
Output Leakage Current
Output Leakage Current
Output Short-Circuit Current
Power Supply Current
7.0 µA Max VIN = 7.0V
50 µA Max VOUT = VCC
4.75
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
50 µA Max VOUT = 2.7V
−50 µA Max VOUT = 0.5V
−60 −150 mA Max VOUT = 0V
78 100 mA Max VO = HIGH Z
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