74F2244DCQR [NSC]
IC,BUFFER/DRIVER,DUAL,4-BIT,F-TTL,DIP,20PIN,CERAMIC;
| 型号： | 74F2244DCQR |
| 厂家： | 
National Semiconductor |
| 描述： | IC,BUFFER/DRIVER,DUAL,4-BIT,F-TTL,DIP,20PIN,CERAMIC 驱动器 |
| 文件： | 总8页 (文件大小：150K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
August 1995
54F/74F2244
Octal Buffer/Line Driver with 25X Series
Resistors in Outputs
General Description
The ’F2244 is an octal buffer/line driver designed to drive
the capacitive inputs of MOS memory drivers, address driv-
ers, clock drivers and bus-oriented transmitters/receivers.
Features
Y
TRI-STATE outputs drive bus lines or buffer memory
É
address registers
Y
Y
12 mA source current
25X series resistors in outputs eliminate the need for
external resistors.
The 25X series resistors in the outputs reduce ringing and
eliminate the need for external resistors.
Y
Y
Designed to drive the capacitive inputs of MOS devices
Guaranteed 4000V minimum ESD protection
Package
Commercial
74F2244PC
Military
Package Description
Number
N20B
20-Lead (0.300 Wide) Molded Dual-In-Line
×
54F2244DM (Note 2)
J20A
20-Lead Ceramic Dual-In-Line
74F2244SC (Note 1)
74F2244MSA (Note 1)
M20B
MSA20
W20A
E20A
20-Lead (0.300 Wide) Molded Small Outline JEDEC
×
20-Lead Molded Shrink Small Outline EIAJ Type II
20-Lead Cerpak
54F2244FM (Note 2)
54F2244LM (Note 2)
20-Lead Ceramic Leadless Chip Carier, Type C
e
Note 1: Devices also available in 13 reel. Use suffix
SCX and MSAX.
×
Note 2: Military grade device with environmental and burn-in processing. Use suffix
e
DMQB, FMQB and LMQB.
Connection Diagrams
Pin Assignment for LCC
’F2244
Pin Assignment for DIP, SOIC and SSOP
’F2244
TL/F/9499–3
TL/F/9499–4
TRI-STATEÉ is a registered trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation
TL/F/9499
RRD-B30M105/Printed in U. S. A.
Logic Symbol
IEEE/IEC
’F2244
TL/F/9499–6
Unit Loading/Fan Out
54F/74F
Pin Names
Description
U.L.
Input I /I
IH IL
Output I /I
HIGH/LOW
OH OL
b
20 mA/ 1 mA
b
20 mA/ 1 mA
b
20 mA/ 1.6 mA
b
15 mA/12 mA
OE , OE
1
TRI-STATE Output Enable Input (Active LOW)
1.0/1.667
1.0/1.667
1.0/2.667*
750/20
2
OE
TRI-STATE Output Enable Input (Active HIGH)
2
I
, I
an bn
Inputs
O
,O
an bn
Outputs
*Worst-case ’F2244 disabled
Truth Table
’F2244
OE
1
I
O
OE
2
I
O
bn
an
an
bn
H
L
L
X
H
L
Z
H
L
L
X
H
L
Z
H
L
H
L
e
e
e
e
H
L
HIGH Voltage Level
LOW Voltage Level
Immaterial
X
Z
High Impedance
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.
Recommended Operating
Conditions
Free Air Ambient Temperature
Military
Commercial
b
a
55 C to 125 C
§
0 C to 70 C
§
§
b
b
a
65 C to 150 C
Storage Temperature
§
§
§
§
§
a
§
a
55 C to 125 C
Ambient Temperature under Bias
§
Supply Voltage
Military
Commercial
b
b
a
a a
4.5V to 5.5V
a a
4.5V to 5.5V
Junction Temperature under Bias
Plastic
55 C to 175 C
§
§
a
55 C to 150 C
V
Pin Potential to
CC
Ground Pin
b
a
0.5V to 7.0V
b
a
0.5V to 7.0V
Input Voltage (Note 2)
Input Current (Note 2)
Voltage Applied to Output
b
a
30 mA to 5.0 mA
e
in HIGH State (with V
Standard Output
TRI-STATE Output
0V)
CC
b
0.5V to 5.5V
0.5V to V
CC
b
a
Current Applied to Output
in LOW State (Max)
twice the rated I (mA)
OL
ESD Last Passing Voltage (Min)
4000V
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
54F/74F
Symbol
Parameter
Units
V
CC
Conditions
Min
Typ
Max
V
V
V
V
Input HIGH Voltage
2.0
V
V
V
Recognized as a HIGH Signal
Recognized as a LOW Signal
IH
Input LOW Voltage
0.8
IL
b
e b
18 mA
Input Clamp Diode Voltage
1.2
Min
Min
I
IN
CD
OH
e b
e b
e b
e b
e b
Output HIGH
Voltage
54F 10% V
2.4
2.0
2.4
2.0
2.7
I
I
I
I
I
3 mA
12 mA
3 mA
15 mA
3 mA
CC
CC
CC
CC
CC
OH
OH
OH
OH
OH
54F 10% V
74F 10% V
74F 10% V
V
74F 5% V
e
e
V
Output LOW
Voltage
0.50
0.75
I
I
1 mA
OL
OL
V
Min
Max
Max
Max
0.0
12 mA
OL
I
I
I
Input HIGH
Current
54F
74F
20.0
5.0
IH
e
e
mA
mA
mA
V
V
V
V
2.7V
IN
IN
Input HIGH Current
Breakdown Test
54F
74F
100
7.0
BVI
7.0V
Output HIGH
54F
74F
250
50
CEX
e
V
CC
OUT
Leakage Current
e
All other pins grounded
V
Input Leakage
Test
I
ID
1.9 mA
ID
OD
IL
74F
74F
4.75
e
All other pins grounded
I
I
Output Leakage
Circuit Current
V
150 mV
IOD
3.75
mA
mA
0.0
b
b
e
e
Input LOW Current
1.0
1.6
V
V
0.5V (OE , OE , OE )
1 2 2
0.5V (I )
IN
Max
IN
n
e
I
I
I
I
I
I
Output Leakage Current
Output Leakage Current
Output Short-Circuit Current
Power Supply Current
Power Supply Current
Power Supply Current
50
mA
mA
mA
mA
mA
mA
Max
Max
Max
Max
Max
Max
V
V
V
V
V
V
2.7V
0.5V
0V
OZH
OZL
OS
OUT
OUT
OUT
b
e
e
50
b
b
225
100
e
40
60
60
60
90
90
HIGH
LOW
CCH
CCL
CCZ
O
e
O
e
HIGH Z
O
3
AC Electrical Characteristics
74F
54F
74F
e a
T
25 C
§
5.0V
A
e
50 pF
e
T
, V
CC
e
Mil
T
, V
Com
e
50 pF
A
A CC
e a
Symbol
Parameter
V
Units
CC
C
C
L
L
e
C
50 pF
L
Min
Typ
Max
Min
Max
Min
Max
t
t
Propagation Delay
Data to Output
1.5
2.5
7.0
8.0
2.0
2.0
6.5
7.0
1.5
2.0
7.0
8.0
PLH
ns
ns
PHL
t
t
Output Enable Time
1.5
2.5
9.0
2.0
2.0
7.0
8.5
1.0
2.5
9.5
PZH
11.5
12.0
PZL
t
t
Output Disable Time
1.5
1.5
9.0
8.5
2.0
2.0
7.0
7.5
1.0
1.5
9.5
9.5
PHZ
PLZ
Ordering Information
The device number is used to form part of a simplified purchasing code where a package type and temperature range are
defined as follows:
74F 2244
S
C
X
Temperature Range Family
Special Variations
e
e
e
74F
54F
Commercial
Military
QB
Military grade device with
environmental and burn-in
processing
Device Type
e
X
Devices shipped in 13 reel
×
Package Code
Temperature Range
e
e
e
e
P
D
S
MSA
Plastic DIP
Ceramic DIP
Small Outline Package (SOIC)
Shrink Small Outline Package SOIC EIAJ
Type II (74F244 only)
e
e
a
C
M
Commercial (0 C to 70 C)
§
§
b a
Military ( 55 C to 125 C)
§
§
e
e
L
F
Leadless Chip Carrier (LCC)
Flatpak
4
5
Physical Dimensions inches (millimeters)
20-Lead Ceramic Leadless Chip Carrier, Type C (L)
NS Package Number E20A
20-Lead Ceramic Dual-In-Line Package (D)
NS Package Number J20A
6
Physical Dimensions inches (millimeters) (Continued)
20-Lead Molded Shrink Small Outline Package, EIAJ Type II (MSA)
NS Package Number MSA20
20-Lead (0.300 Wide) Molded Dual-In-Line Package (P)
×
NS Package Number N20B
7
Physical Dimensions inches (millimeters) (Continued)
20-Lead Cerpak (F)
NS Package Number W20A
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to the user.
2. A critical component is any component of a life
support device or system whose failure to perform can
be reasonably expected to cause the failure of the life
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effectiveness.
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