TL F 9598
54F74F827
74F828
10-Bit
BuffersLine
Drivers
December 1994
54F 74F827
74F828
10-Bit Buffers Line Drivers
General Description
The 'F827 and 'F828 10-bit bus buffers provide high per-
formance bus interface buffering for wide data address
paths or buses carrying parity The 10-bit buffers have NOR
output enables for maximum control flexibility
The 'F827 and 'F828 are functionally- and pin-compatible to
AMD's Am29827 and Am29828 The 'F828 is an inverting
version of the 'F827
Features
Y
TRI-STATE
output
Y
'F828 is inverting
Y
Direct replacement for AMD's Am29827 and Am29828
Commercial
Military
Package
Package Description
Number
74F827SPC
N24C
24-Lead (0 300 Wide) Molded Dual-In-Line
54F827SDM (Note 2)
J24F
24-Lead (0 300 Wide) Ceramic Dual-In-Line
74F827SC (Note 1)
M24B
24-Lead (0 300 Wide) Molded Small Outline JEDEC
54F827FM (Note 2)
W24C
24-Lead Cerpack
54F827LM (Note 2)
E28A
24-Lead Ceramic Leadless Chip Carrier Type C
74F828SPC
N24C
24-Lead (0 300 Wide) Molded Dual-In-Line
74F828SC (Note 1)
M24B
24-Lead (0 300 Wide) Molded Small Outline JEDEC
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
Connection Diagrams
Pin Assignment for
DIP Flatpak and SOIC
Pin Assignment
for LCC
'F827
TL F 9598 1
'F828
TL F 9598 8
'F827
TL F 9598 2
TRI-STATE
is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation
RRD-B30M75 Printed in U S A
Logic Symbols
IEEE IEC
'F827
TL F 9598 6
IEEE IEC
'F828
TL F 9598 7
'F827
TL F 9598 3
'F828
TL F 9598 10
2
Unit Loading Fan Out
54F 74F
Pin Names
Description
U L
Input I
IH
I
IL
HIGH LOW
Output I
OH
I
OL
OE
1
OE
2
Output Enable Input
1 0 1 0
20 mA
b
0 6 mA
D
0
D
7
Data Inputs
1 0 1 0
20 mA
b
0 6 mA
O
0
O
7
Data Outputs TRI-STATE 600 106 6 (80)
b
12 mA 64 mA (48 mA)
Functional Description
The 'F827 and 'F828 are line drivers designed to be em-
ployed as memory address drivers clock drivers and bus-
oriented transmitters receivers which provide improved PC
board density The devices have TRI-STATE outputs con-
trolled by the Output Enable (OE) pins The outputs can sink
64 mA (48 mA mil) and source 15 mA Input clamp diodes
limit high-speed termination effects
Function Table
Inputs
Outputs
OE
D
n
O
n
Function
'F827
'F828
L
H
H
L
Transparent
L
L
L
H
Transparent
H
X
Z
Z
High Z
H
e
HIGH Voltage level
L
e
LOW Voltage Level
Z
e
High Impedance
X
e
Immaterial
Logic Diagrams
'F827
TL F 9598 4
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays
'F828
TL F 9598 11
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 4
I
OH
e b
3 mA
Voltage
54F 10% V
CC
2 0
I
OH
e b
12 mA
74F 10% V
CC
2 4
V
Min
I
OH
e b
3 mA
74F 10% V
CC
2 0
I
OH
e b
15 mA
74F 5% V
CC
2 7
I
OH
e b
3 mA
V
OL
Output LOW
54F 10% V
CC
0 55
V
Min
I
OL
e
48 mA
Voltage
74F 10% V
CC
0 55
I
OL
e
64 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
100
b
225
mA
Max
V
OUT
e
0V
4
DC Electrical Characteristics
(Continued)
Symbol
Parameter
54F 74F
Units
V
CC
Conditions
Min
Typ
Max
I
ZZ
Bus Drainage Test
500
m
A
0 0V
V
OUT
e
5 25V
I
CCH
Power Supply Current ('F827)
30
45
mA
Max
V
O
e
HIGH
I
CCL
Power Supply Current ('F827)
60
90
mA
Max
V
O
e
LOW
I
CCZ
Power Supply Current ('F827)
40
60
mA
Max
V
O
e
HIGH Z
I
CCH
Power Supply Current ('F828)
14
20
mA
Max
V
O
e
HIGH
I
CCL
Power Supply Current ('F828)
56
85
mA
Max
V
O
e
LOW
I
CCZ
Power Supply Current ('F828)
35
50
mA
Max
V
O
e
HIGH Z
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
t
PLH
Propagation Delay
1 0
3 0
5 5
1 0
7 5
1 0
6 5
ns
t
PHL
Data to Output ('F827)
1 5
3 3
5 5
1 5
7 0
1 5
6 0
t
PLH
Propagation Delay
1 0
3 0
5 0
1 0
5 5
ns
t
PHL
Data to Output ('F828)
1 0
2 0
4 0
1 0
4 0
t
PZH
Output Enable Time
3 0
5 7
9 0
2 5
10 0
2 5
9 5
ns
t
PZL
OE to O
n
3 5
6 8
11 5
3 0
12 5
3 0
12 0
t
PHZ
Output Disable Time
1 5
3 3
8 0
1 5
9 0
1 5
8 5
ns
t
PLZ
OE to O
n
1 0
3 5
8 0
1 0
9 0
1 0
8 5
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
827 828
S
C
X
Temperature Range Family
Special Variations
74F
e
Commercial
X
e
Devices shipped in 13 reel
54F
e
Military
Temperature Range
Device Type
C
e
Commercial (0 C to
a
70 C)
M
e
Military (
b
55 C to
a
125 C)
Package Code
SP
e
Slim Plastic DIP
SD
e
Slim Ceramic DIP
F
e
Flatpak
L
e
Leadless Chip Carrier (LCC)
S
e
Small Outline (SOIC)
5
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