54F 74F821 10-Bit D-Type Flip-Flop
December 1994
54F 74F821
10-Bit D-Type Flip-Flop
General Description
The ’F821 is a 10-bit D-type flip-flop with TRI-STATE true
outputs arranged in a broadside pinout The ’F821 is func-
tionally and pin compatible with the AMD’s Am29821
Features
Y
Y
TRI-STATE Outputs
Direct replacement for AMD’s Am29821
Commercial
74F821SPC
Military
Package
Number
N24C
Package Description
24-Lead (0 300 Wide) Molded Dual-In-Line
24-Lead (0 300 Wide) Ceramic Dual-In-Line
24-Lead (0 300 Wide) Molded Small Outline JEDEC
24-Lead Cerpack
24-Lead Ceramic Leadless Chip Carrier Type C
54F821SDM (Note 2)
74F821SC (Note 1)
54F821FM (Note 2)
54F821LM (Note 2)
Note 1
Devices also available in 13 reel Use suffix
e
SCX
J24F
M24B
W24C
E28A
Note 2
Military grade device with environmental and burn-in processing Use suffix
e
SDMQB FMQB and LMQB
Logic Symbols
Connection Diagrams
Pin Assignment
for DIP SOIC and Flatpak
Pin Assignment
for LCC
TL F 9595–1
IEEE IEC
TL F 9595 – 3
TL F 9595 – 2
TL F 9595–5
TRI-STATE is a registered trademark of National Semiconductor Corporation
C
1995 National Semiconductor Corporation
TL F 9595
RRD-B30M75 Printed in U S A
Unit Loading Fan Out
54F 74F
Pin Names
Description
UL
HIGH LOW
10 10
10 10
10 10
150 40 (33 3)
Input I
IH
I
IL
Output I
OH
I
OL
20
mA
b
0 6 mA
20
mA
b
0 6 mA
20
mA
b
0 6 mA
b
3 0 mA 24 mA (20 mA)
D
0
– D
9
OE
CP
O
0
– O
9
Data Inputs
Output Enable
TRI-STATE Input
Clock Input
TRI-STATE Outputs
Functional Description
The ’F821 consists of ten D-type edge-triggered flip-flops
This device has TRI-STATE true outputs for bus systems
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 con-
tent 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
H
H
H
H
L
L
L
L
CP
H
L
L
L
L
L
H
L
D
X
X
L
H
L
H
X
X
Internal
Q
NC
NC
H
L
H
L
NC
NC
Output
O
Z
Z
Z
Z
L
H
NC
NC
Hold
Hold
Load
Load
Data Available
Data Available
No Change in Data
No Change in Data
Function
L
e
LOW Voltage Level
H
e
HIGH Voltage Level
X
e
Immaterial
Z
e
High Impedance
L
e
LOW-to-HIGH Transition
NC
e
No Change
Logic Diagram
TL F 9595 – 4
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays
2
Absolute Maximum Ratings
(Note 1)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Storage Temperature
Ambient Temperature under Bias
Junction Temperature under Bias
Plastic
V
CC
Pin Potential to
Ground Pin
b
65 C to
a
150 C
b
55 C to
a
125 C
b
55 C to
a
175 C
b
55 C to
a
150 C
b
0 5V to
a
7 0V
Recommended Operating
Conditions
Free Air Ambient Temperature
Military
Commercial
Supply Voltage
Military
Commercial
b
55 C to
a
125 C
0 C to
a
70 C
a
4 5V to
a
5 5V
a
4 5V to
a
5 5V
b
0 5V to
a
7 0V
Input Voltage (Note 2)
b
30 mA to
a
5 0 mA
Input Current (Note 2)
Voltage Applied to Output
in HIGH State (with V
CC
e
0V)
b
0 5V to V
CC
Standard Output
b
0 5V to
a
5 5V
TRI-STATE Output
Current Applied to Output
in LOW State (Max)
twice the rated I
OL
(mA)
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
V
IH
V
IL
V
CD
V
OH
Parameter
Min
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH
Voltage
54F 10% V
CC
54F 10% V
CC
74F 10% V
CC
74F 10% V
CC
74F 5% V
CC
74F 5% V
CC
54F 10% V
CC
74F 10% V
CC
54F
74F
54F
74F
54F
74F
74F
74F
4 75
3 75
b
0 6
54F 74F
Typ
Max
Units
V
08
b
1 2
V
CC
Conditions
Recognized as a HIGH Signal
Recognized as a LOW Signal
20
V
V
Min
I
IN
e b
18 mA
I
OH
I
OH
I
OH
I
OH
I
OH
I
OH
e
e
e
e
e
e
b
1 mA
b
3 mA
b
1 mA
b
3 mA
b
1 mA
b
3 mA
25
24
25
24
27
27
05
05
20 0
50
100
70
250
50
V
Min
V
OL
I
IH
I
BVI
I
CEX
V
ID
I
OD
I
IL
I
OZH
I
OZL
I
OS
I
CCZ
Output LOW
Voltage
Input HIGH Current
Input HIGH Current
Breakdown Test
Output HIGH
Leakage Current
Input Leakage Test
Output Leakage
Circuit Current
Input LOW Current
V
mA
mA
mA
V
mA
mA
mA
mA
mA
mA
Min
Max
Max
Max
00
00
Max
Max
Max
Max
Max
I
OL
e
20 mA
I
OL
e
24 mA
V
IN
e
2 7V
V
IN
e
7 0V
V
OUT
e
V
CC
I
ID
e
1 9
mA
All Other Pins Grounded
V
IOD
e
150 mV
All Other Pins Grounded
V
IN
e
0 5V
V
OUT
e
2 7V
V
OUT
e
0 5V
V
OUT
e
0V
V
O
e
HIGH Z
Output Leakage Current
Output Leakage Current
Output Short-Circuit Current
Power Supply Current
b
60
50
b
50
b
150
78
100
3
AC Electrical Characteristics
74F
Symbol
Parameter
Min
f
max
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Maximum Clock Frequency
Propagation Delay
CP to O
n
Output Enable Time
OE to O
n
Output Disable Time
OE to O
n
100
20
20
20
20
15
15
T
A
e a
25 C
V
CC
e a
5 0V
C
L
e
50 pF
Typ
150
64
62
58
63
34
35
95
95
10 5
10 5
70
70
Max
54F
T
A
V
CC
e
Mil
C
L
e
50 pF
Min
60
20
20
20
20
10
10
10 5
10 5
13 0
13 0
75
75
Max
74F
T
A
V
CC
e
Com
C
L
e
50 pF
Min
70
20
20
20
20
15
15
10 5
10 5
11 5
11 5
75
75
Max
MHz
ns
Units
ns
AC Operating Requirements
74F
Symbol
Parameter
T
A
e a
25 C
V
CC
e a
5 0V
Min
t
s
(H)
t
s
(L)
t
h
(H)
t
h
(L)
t
w
(H)
t
w
(L)
Setup Time HIGH or LOW
D
n
to CP
Hold Time HIGH or LOW
D
n
to CP
CP Pulse Width
HIGH or LOW
25
25
25
25
50
50
Max
54F
T
A
V
CC
e
Mil
Min
40
40
25
25
60
60
Max
74F
T
A
V
CC
e
Com
Min
30
30
25
25
60
60
ns
Max
Units
ns
4
Ordering Information
The device number is used to form part of a simplified purchasing code where the package type and temperature range are
defined as follows
74F
Temperature Range Family
74F
e
Commercial FAST
54F
e
Military FAST
Device Type
Package Code
SP
e
Slim Plastic DIP
SD
e
Slim Ceramic DIP
Flatpak
F
e
L
e
Leadless Chip Carrier (LCC)
S
e
Small Outline (SOIC)
821
S
C
X
Special Variations
QB
e
Military grade device with
environmental and burn-in
processing
X
e
Devices ship in 13 reel
Temperature Range
C
e
Commercial (0 C to
a
70 C)
M
e
Military (
b
55 C to
a
125 C)
5
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