TL F 9597
54F74F825
8-Bit
D-Type
Flip-Flop
December 1994
54F 74F825
8-Bit D-Type Flip-Flop
General Description
The 'F825 is an 8-bit buffered register It has Clock Enable
and Clear features which are ideal for parity bus interfacing
in high performance microprogramming systems Also in-
cluded in the 'F825 are multiple enables that allow multi-
user control of the interface
The 'F825 is functionally and pin compatible with AMD's
Am29825
Features
Y
TRI-STATE
output
Y
Clock enable and clear
Y
Multiple output enables
Y
Direct replacement for AMD's Am24825
Commercial
Military
Package
Package Description
Number
74F825SPC
N24C
24-Lead (0 300 Wide) Molded Dual-In-Line
54F825SDM (Note 2)
J24F
24-Lead (0 300 Wide) Ceramic Dual-In-Line
74F825SC (Note 1)
M24B
24-Lead (0 300 Wide) Molded Small Outline JEDEC
54F825FM (Note 2)
W24C
24-Lead Cerpack
54F825LM (Note 2)
E28A
24-Lead Ceramic Leadless Chip Carrier Type C
Note 1
Devices also available in 13
reel Use suffix
e
SCX
Note 2
Military grade device with environmental and burn-in processing Use suffix
e
SDMQB FMQB and LMQB
Logic Symbols
TL F 9597 1
IEEE IEC
TL F 9597 4
TRI-STATE
is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation
RRD-B30M75 Printed in U S A
Connection Diagrams
Pin Assignment
for DIP SOIC and Flatpak
TL F 9597 2
Pin Assignment
for LCC
TL F 9597 3
Unit Loading Fan Out
54F 74F
Pin Names
Description
U L
Input I
IH
I
IL
HIGH LOW
Output I
OH
I
OL
D
0
D
7
Data Inputs
1 0 1 0
20 mA
b
0 6 mA
O
0
O
7
TRI-STATE Data Outputs
150 40 (33 3)
b
3 mA 24 mA (20 mA)
OE
1
OE
2
OE
3
Output Enable Input
1 0 1 0
20 mA
b
0 6 mA
EN
Clock Enable
1 0 1 0
20 mA
b
0 6 mA
CLR
Clear
1 0 1 0
20 mA
b
0 6 mA
CP
Clock Input
1 0 2 0
20 mA
b
1 2 mA
2
Functional Description
The 'F825 consists of eight D-type edge-triggered flip-flops
This device has TRI-STATE true outputs and is organized in
broadside pinning In addition to the clock and output en-
able pins the buffered clock (CP) and buffered Output En-
able (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 contents of the flip-flops
are available at the outputs When the OE is HIGH the out-
puts go to the high impedance state Operation of the OE
input does not affect the state of the flip-flops The 'F825
has Clear (CLR) and Clock Enable (EN) pins
When the CLR is LOW and the OE is LOW the outputs are
LOW When CLR is HIGH data can be entered into the flip-
flops When EN is LOW data on the inputs is transferred to
the outputs on the LOW-to-HIGH clock transition When the
EN is HIGH the outputs do not change state regardless of
the data or clock input transitions
Function Table
Inputs
Internal
Output
Function
OE
CLR
EN
CP
D
Q
O
H
H
L
H
X
NC
Z
Hold
H
H
L
L
X
NC
Z
Hold
H
H
H
X
X
NC
Z
Hold
L
H
H
X
X
NC
NC
Hold
H
L
X
X
X
H
Z
Clear
L
L
X
X
X
H
L
Clear
H
H
L
L
L
H
Z
Load
H
H
L
L
H
L
Z
Load
L
H
L
L
L
H
L
Data Available
L
H
L
L
H
L
H
Data Available
L
H
L
H
X
NC
NC
No Change in Data
L
H
L
L
X
NC
NC
No Change in Data
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 9597 5
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays
3
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
b
65 C to
a
150 C
Ambient Temperature under Bias
b
55 C to
a
125 C
Junction Temperature under Bias
b
55 C to
a
175 C
Plastic
b
55 C to
a
150 C
V
CC
Pin Potential to
Ground Pin
b
0 5V to
a
7 0V
Input Voltage (Note 2)
b
0 5V to
a
7 0V
Input Current (Note 2)
b
30 mA to
a
5 0 mA
Voltage Applied to Output
in HIGH State (with V
CC
e
0V)
Standard Output
b
0 5V to V
CC
TRI-STATE Output
b
0 5V to
a
5 5V
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
Recommended Operating
Conditions
Free Air Ambient Temperature
Military
b
55 C to
a
125 C
Commercial
0 C to
a
70 C
Supply Voltage
Military
a
4 5V to
a
5 5V
Commercial
a
4 5V to
a
5 5V
DC Electrical Characteristics
Symbol
Parameter
54F 74F
Units
V
CC
Conditions
Min
Typ
Max
V
IH
Input HIGH Voltage
2 0
V
Recognized as a HIGH Signal
V
IL
Input LOW Voltage
0 8
V
Recognized as a LOW Signal
V
CD
Input Clamp Diode Voltage
b
1 2
V
Min
I
IN
e b
18 mA
V
OH
Output HIGH
54F 10% V
CC
2 5
I
OH
e b
1 mA
Voltage
54F 10% V
CC
2 4
I
OH
e b
3 mA
74F 10% V
CC
2 5
V
Min
I
OH
e b
1 mA
74F 10% V
CC
2 4
I
OH
e b
3 mA
74F 5% V
CC
2 7
I
OH
e b
1 mA
74F 5% V
CC
2 7
I
OH
e b
3 mA
V
OL
Output LOW
54F 10% V
CC
0 5
V
Min
I
OL
e
20 mA
Voltage
74F 10% V
CC
0 5
I
OL
e
24 mA
I
IH
Input HIGH
54F
20 0
m
A
Max
V
IN
e
2 7V
Current
74F
5 0
I
BVI
Input HIGH Current
54F
100
m
A
Max
V
IN
e
7 0V
Breakdown Test
74F
7 0
I
CEX
Output HIGH
54F
250
m
A
Max
V
OUT
e
V
CC
Leakage Current
74F
50
V
ID
Input Leakage
74F
4 75
V
0 0
I
ID
e
1 9 mA
Test
All Other Pins Grounded
I
OD
Output Leakage
74F
3 75
m
A
0 0
V
IOD
e
150 mV
Circuit Current
All Other Pins Grounded
I
IL
Input LOW Current
b
0 6
mA
Max
V
IN
e
0 5V
I
OZH
Output Leakage Current
50
m
A
Max
V
OUT
e
2 7V
I
OZL
Output Leakage Current
b
50
m
A
Max
V
OUT
e
0 5V
I
OS
Output Short-Circuit Current
b
60
b
150
mA
Max
V
OUT
e
0V
I
ZZ
Buss Drainage Test
500
m
A
0 0V
V
OUT
e
5 25V
I
CCZ
Power Supply Current
75
90
mA
Max
V
O
e
HIGH Z
4
AC Electrical Characteristics
74F
54F
74F
T
A
e a
25 C
T
A
V
CC
e
Mil
T
A
V
CC
e
Com
Symbol
Parameter
V
CC
e a
5 0V
C
L
e
50 pF
C
L
e
50 pF
Units
C
L
e
50 pF
Min
Typ
Max
Min
Max
Min
Max
f
max
Maximum Clock Frequency
100
160
60
70
MHz
t
PLH
Propagation Delay
2 0
6 5
9 5
2 0
10 5
2 0
10 5
ns
t
PHL
CP to O
n
2 0
6 6
9 5
2 0
10 5
2 0
10 5
t
PHL
Propagation Delay
4 0
7 4
12 0
4 0
13 0
4 0
13 0
ns
CLR to O
n
t
PZH
Output Enable Time
2 0
6 5
10 5
2 0
13 0
2 0
11 5
t
PZL
OE to O
n
2 0
6 6
10 5
2 0
13 0
2 0
11 5
ns
t
PHZ
Output Disable TIme
1 5
3 5
7 0
1 0
7 5
1 5
7 5
t
PLZ
OE to O
n
1 5
3 3
7 0
1 0
7 5
1 5
7 5
AC Operating Requirements
74F
54F
74F
Symbol
Parameter
T
A
e a
25 C
T
A
V
CC
e
Mil
T
A
V
CC
e
Com
Units
V
CC
e a
5 0V
Min
Max
Min
Max
Min
Max
t
s
(H)
Setup Time HIGH or LOW
2 5
4 0
3 0
t
s
(L)
D
n
to CP
2 5
4 0
3 0
ns
t
h
(H)
Hold Time HIGH or LOW
2 5
2 5
2 5
t
h
(L)
D
n
to CP
2 5
2 5
2 5
t
s
(H)
Setup Time HIGH or LOW
4 5
5 0
5 0
t
s
(L)
EN to CP
2 5
3 0
3 0
ns
t
h
(H)
Hold Time HIGH or LOW
2 0
3 0
1 0
t
h
(L)
EN to CP
0
2 0
0
t
w
(H)
CP Pulse Width
5 0
6 0
6 0
ns
t
w
(L)
HIGH or LOW
5 0
6 0
6 0
t
w
(L)
CLR Pulse Width LOW
5 0
5 0
5 0
ns
t
rec
CLR Recovery Time
5 0
5 0
5 0
ns
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
825
S
C
X
Temperature Range Family
Special Variations
74F
e
Commercial
X
e
Devices shipped in 13 reels
54F
e
Military
QB
e
Military grade with environmental
and burn-in processing shipped
Device Type
in tubes
Package Code
Temperature Range
SP
e
Slim Plastic DIP
C
e
Commercial (0 C to
a
70 C)
SD
e
Slim Ceramic DIP
M
e
Military (
b
55 C to
a
125 C)
F
e
Flatpak
L
e
Leadless Chip Carrier (LCC)
S
e
Small Outline (SOIC)
5
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