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CD74FCT821AEN Fiches technique(PDF) 1 Page - Texas Instruments

No de pièce CD74FCT821AEN
Description  BiCMOS FCT Interface Logic, 10- Bit D-Type Flip-Flops, Three-State
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

CD74FCT821AEN Fiches technique(HTML) 1 Page - Texas Instruments

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8-1
Data sheet acquired from Harris Semiconductor
SCHS264
Features
• Buffered Inputs
• Typical Propagation Delay: 7.5ns at VCC = 5V,
TA = 25
oC, C
L = 50pF
• CD74FCT821A
- Noninverting
• CD74FCT822A
- Inverting
• SCR Latchup Resistant BiCMOS Process and
Circuit Design
• Speed of Bipolar FAST™/AS/S
• 48mA Output Sink Current
• Output Voltage Swing Limited to 3.7V at VCC = 5V
• Controlled Output Edge Rates
• Input/Output Isolation to VCC
• BiCMOS Technology with Low Quiescent Power
Description
The CD74FCT821A and CD74FCT822A ten bit, D-Type,
three-state, positive edge triggered flip-flops use a small
geometry BiCMOS technology. The output stage is a combi-
nation of bipolar and CMOS transistors that limits the output
HIGH level to two diode drops below VCC. This resultant
lowering of output swing (0V to 3.7V) reduces power bus
ringing (a source of EMI) and minimizes VCC bounce and
ground bounce and their effects during simultaneous output
switching. The output configuration also enhances switching
speed and is capable of sinking 48 milliamperes.
The ten flip-flops enter data into their registers on the LOW
to HIGH transition of the clock(CP). The Output Enable (OE)
controls the three state outputs and is independent of the
register operation. When the Output Enable (OE) is HIGH,
the
outputs
are
in
the
high
impedance
state.
The
CD74FCT821A and CD74FCT822A share the same config-
urations, but the CD74FCT821A outputs are noninverted
while the CD74FCT822A devices have inverted outputs.
Ordering Information
Pinouts
PART NUMBER
TEMP.
RANGE (oC)
PACKAGE
PKG.
NO.
CD74FCT821AEN
0 to 70
24 Ld PDIP
E24.3
CD74FCT822AEN
0 to 70
24 Ld PDIP
E24.3
CD74FCT821AM
0 to 70
24 Ld SOIC
M24.3
NOTE: When ordering the suffix M packages, use the entire part
number. Add the suffix 96 to obtain the variant in the tape and reel.
CD74FCT821A
(PDIP, SOIC)
TOP VIEW
CD74FCT822A
(PDIP, SOIC)
TOP VIEW
1
2
3
4
5
6
7
8
9
10
11
12
OE
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
GND
16
17
18
19
20
21
22
23
24
15
14
13
VCC
Q1
Q2
Q3
Q4
Q6
Q8
Q9
CP
Q0
Q5
Q7
1
2
3
4
5
6
7
8
9
10
11
12
16
17
18
19
20
21
22
23
24
15
14
13
OE
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
GND
VCC
Q1
Q2
Q3
Q4
Q6
Q8
Q9
CP
Q0
Q5
Q7
January 1997
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
FAST™ is a trademark of Fairchild Semiconductor.
Copyright
© Harris Corporation 1997
CD74FCT821A,
CD74FCT822A
BiCMOS FCT Interface Logic,
10- Bit D-Type Flip-Flops, Three-State
File Number
2390.2
NOT RECOMMENDED
FOR NEW
DESIGNS
Use CMOS
Technology


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