74F2244 [FAIRCHILD]
Octal Buffer/Line Driver with 25ヘ Series Resistors in Outputs; 25ヘ系列电阻器在输出的八路缓冲器/线路驱动器
| 型号： | 74F2244 |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | Octal Buffer/Line Driver with 25ヘ Series Resistors in Outputs |
| 文件： | 总6页 (文件大小：56K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
October 1988
Revised March 1999
74F2244
Octal Buffer/Line Driver
with 25Ω 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
■ 3-STATE outputs drive bus lines or buffer memory
address registers
■ 12 mA source current
The 25Ω series resistors in the outputs reduce ringing and
eliminate the need for external resistors.
■ 25Ω series resistors in outputs eliminate the need for
external resistors.
■ Designed to drive the capacitive inputs of MOS devices
■ Guaranteed 4000V minimum ESD protection
Ordering Code:
Order Number Package Number
Package Description
74F2244SC
74F2244MSA
74F2244PC
M20B
MSA20
N20A
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Logic Symbol
IEEE/IEC
© 1999 Fairchild Semiconductor Corporation
DS009499.prf
www.fairchildsemi.com
Unit Loading/Fan Out
U.L.
Input IIH/IIL
Pin Names
Description
HIGH/LOW
Output IOH/IOL
OE1, OE2
OE2
3-STATE Output Enable Input (Active LOW)
1.0/1.667
1.0/1.667
20 µA/−1 mA
20 µA/−1 mA
20 µA/−1.6 mA
−15 mA/12 mA
3-STATE Output Enable Input (Active HIGH)
Ian, Ibn
Inputs
1.0/2.667 (Note 1)
750/20
Oan,Obn
Outputs
Note 1: Worst-case F2244 disabled
Truth Table
OE1
Ian
Oan
OE2
Ibn
Obn
H
L
L
X
H
L
Z
H
L
H
L
L
X
H
L
Z
H
L
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
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2
Absolute Maximum Ratings(Note 2)
Recommended Operating
Conditions
Storage Temperature
−65°C to +150°C
Ambient Temperature under Bias
Junction Temperature under Bias
VCC Pin Potential to Ground Pin
Input Voltage (Note 3)
−55°C to +125°C
−55°C to +150°C
−0.5V to +7.0V
Free Air Ambient Temperature
Supply Voltage
0°C to +70°C
+4.5V to +5.5V
−0.5V to +7.0V
Input Current (Note 3)
−30 mA to +5.0 mA
Voltage Applied to Output
in HIGH State (with VCC = 0V)
Standard Output
−0.5V to VCC
Note 2: 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.
3-STATE Output
−0.5V to +5.5V
Current Applied to Output
in LOW State (Max)
Note 3: Either voltage limit or current limit is sufficient to protect inputs.
twice the rated IOL (mA)
4000V
ESD Last Passing Voltage (Min)
DC Electrical Characteristics
V
Symbol
Parameter
Min
Typ
Max
Units
Conditions
CC
V
V
V
V
Input HIGH Voltage
2.0
V
V
V
V
Recognized as a HIGH Signal
Recognized as a LOW Signal
IH
Input LOW Voltage
0.8
IL
Input Clamp Diode Voltage
Output HIGH Voltage
−1.2
Min
Min
I
I
I
I
I
I
= −18 mA
CD
OH
IN
10% V
10% V
2.4
2.0
2.7
= −3 mA
= −15 mA
= −3 mA
= 1 mA
CC
CC
OH
OH
OH
OL
OL
5% V
CC
V
Output LOW Voltage
Input HIGH Current
0.50
0.75
5.0
V
Min
OL
= 12 mA
= 2.7V
I
I
I
µA
µA
µA
V
Max
Max
Max
0.0
V
V
V
IH
IN
Input HIGH Current Breakdown Test
Output HIGH Leakage Current
Input Leakage
7.0
= 7.0V
BVI
IN
50
= V
CC
CEX
OUT
V
4.75
I
= 1.9 µA
ID
ID
Test
All other pins grounded
V = 150 mV
IOD
I
I
Output Leakage
3.75
µA
0.0
OD
Circuit Current
All other pins grounded
Input LOW Current
−1.0
−1.6
50
mA
Max
V
V
V
V
V
V
V
V
= 0.5V (OE , OE , OE )
1 2 2
IL
IN
= 0.5V (I )
IN
n
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
µA
µA
Max
Max
Max
Max
Max
Max
= 2.7V
= 0.5V
= 0V
OZH
OZL
OS
OUT
OUT
OUT
−50
−225
60
−100
mA
mA
mA
mA
40
60
60
= HIGH
= LOW
CCH
CCL
CCZ
O
O
O
90
90
= HIGH Z
3
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AC Electrical Characteristics
T
= +25°C
T
= −55°C to +125°C
T = 0°C to +70°C
A
A
A
V
= +5.0V
= 50 pF
Typ
C
= 50 pF
C = 50 pF
L
CC
L
Symbol
Parameter
Units
C
L
Min
1.5
2.5
1.5
2.5
1.5
1.5
Max
7.0
Min
2.0
2.0
2.0
2.0
2.0
2.0
Max
Min
1.5
2.0
1.0
2.5
1.0
1.5
Max
t
t
t
t
t
t
Propagation Delay
6.5
7.0
7.0
8.5
7.0
7.5
7.0
8.0
ns
PLH
Data to Output
8.0
PHL
PZH
PZL
PHZ
PLZ
Output Enable Time
9.0
9.5
12.0
9.5
9.5
11.5
9.0
ns
Output Disable Time
8.5
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4
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
Package Number M20B
20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
Package Number MSA20
5
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Package Number N20A
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be rea-
sonably expected to result in a significant injury to the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.
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