74F240 • 74F241 • 74F244 Octal Buffers/Line Drivers with 3-STATE Outputs
April 1988
Revised January 2004
74F240 • 74F241 • 74F244
Octal Buffers/Line Drivers with 3-STATE Outputs
General Description
The 74F240, 74F241 and 74F244 are octal buffers and line
drivers designed to be employed as memory and address
drivers, clock drivers and bus-oriented transmitters/receiv-
ers which provide improved PC and board density.
Features
s
3-STATE outputs drive bus lines or buffer memory
address registers
s
Outputs sink 64 mA (48 mA mil)
s
12 mA source current
s
Input clamp diodes limit high-speed termination effects
Ordering Code:
Order Code
74F240SC (Note 1)
74F240SJ (Note 1)
74F240PC
74F241SC
74F241PC
74F244SC (Note 1)
74F244SJ (Note 1)
74F244MSA (Note 1)
74F244PC
Package
Number
M20B
M20D
N20A
M20B
N20A
M20B
M20D
MSA20
N20A
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
Note 1:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagrams
74F240
74F241
74F244
© 2004 Fairchild Semiconductor Corporation
DS009501
www.fairchildsemi.com
74F240 • 74F241 • 74F244
Absolute Maximum Ratings
(Note 3)
Storage Temperature
Ambient Temperature under Bias
Junction Temperature under Bias
V
CC
Pin Potential to Ground Pin
Input Voltage (Note 4)
Input Current (Note 4)
Voltage Applied to Output
in HIGH State (with V
CC
=
0V)
Standard Output
3-STATE Output
Current Applied to Output
in LOW State (Max)
ESD Last Passing Voltage (Min)
twice the rated I
OL
(mA)
4000V
−
65
°
C to
+
150
°
C
−
55
°
C to
+
125
°
C
−
55
°
C to
+
150
°
C
−
0.5V to
+
7.0V
−
0.5V to
+
7.0V
−
30 mA to
+
5.0 mA
Recommended Operating
Conditions
Free Air Ambient Temperature
Supply Voltage
0
°
C to
+
70
°
C
+
4.5V to
+
5.5V
−
0.5V to V
CC
−
0.5V to
+
5.5V
Note 3:
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 4:
Either voltage limit or current limit is sufficient to protect inputs.
DC Electrical Characteristics
Symbol
V
IH
V
IL
V
CD
V
OH
Parameter
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH
Voltage
V
OL
I
IH
I
BVI
I
CEX
V
ID
I
OD
Output LOW Voltage
Input HIGH
Current
Input HIGH Current
Breakdown Test
Output HIGH
Leakage Current
Input Leakage
Test
Output Leakage
Circuit Current
I
IL
I
OZH
I
OZL
I
OS
I
ZZ
I
CCH
I
CCL
I
CCZ
I
CCH
I
CCL
I
CCZ
Input LOW Current
Output Leakage Current
Output Leakage Current
Output Short-Circuit Current
Bus Drainage Test
Power Supply Current (74F240)
Power Supply Current (74F240)
Power Supply Current (74F240)
Power Supply Current
(74F241, 74F244)
Power Supply Current
(74F241, 74F244)
Power Supply Current
(74F241, 74F244)
19
50
42
40
60
60
−100
4.75
3.75
−1.0
−1.6
50
−50
−225
500
29
75
63
60
90
90
10% V
CC
10% V
CC
5% V
CC
10% V
CC
2.4
2.0
2.7
0.55
5.0
7.0
50
V
µA
µA
µA
V
µA
Min
Max
Max
Max
0.0
0.0
V
Min
Min
2.0
0.8
−1.2
Typ
Max
Units
V
V
V
Min
V
CC
Conditions
Recognized as a HIGH Signal
Recognized as a LOW Signal
I
IN
= −18
mA
I
OH
= −3
mA
I
OH
= −15
mA
I
OH
= −3
mA
I
OL
=
64 mA
V
IN
=
2.7V
V
IN
=
7.0V
V
OUT
=
V
CC
I
ID
=
1.9
µA
All Other Pins Grounded
V
IOD
=
150 mV
All Other Pins Grounded
V
IN
=
0.5V (OE
1
, OE
2
, OE
2
, D
n
74F240))
V
IN
=
0.5V (D
n
(74F241, 74F244))
V
OUT
=
2.7V
V
OUT
=
0.5V
V
OUT
=
0V
V
OUT
=
5.25V
V
O
=
HIGH
V
O
=
LOW
V
O
=
HIGH Z
V
O
=
HIGH
V
O
=
LOW
V
O
=
HIGH Z
mA
µA
µA
mA
µA
mA
mA
mA
mA
mA
mA
Max
Max
Max
Max
0.0V
Max
Max
Max
Max
Max
Max
3
www.fairchildsemi.com
聊聊、笑笑、闹闹
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
