74ABT241 Octal Buffer/Line Driver with 3-STATE Outputs
January 1995
Revised November 1999
74ABT241
Octal Buffer/Line Driver with 3-STATE Outputs
General Description
The ABT241 is an octal buffer and line driver with 3-STATE
outputs designed to be employed as a memory and
address driver, clock driver, or bus-oriented transmitter/
receiver.
Features
s
Non-inverting buffers
s
Output sink capability of 64 mA, source capability of
32 mA
s
Guaranteed latchup protection
s
High impedance glitch free bus loading during entire
power up and power down cycle
s
Nondestructive hot insertion capability
Ordering Code:
Order Number
74ABT241CSC
74ABT241CSJ
74ABT241CMSA
74ABT241CMTC
Package Number
M20B
M20D
MSA20
MTC20
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Device also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Pin Descriptions
Pin Names
OE
1
OE
2
I
0
–I
7
O
0
–O
7
Description
Output Enable Input (Active LOW)
Output Enable Input (Active HIGH)
Inputs
Outputs
Truth Table
OE
1
H
L
L
I
0–3
X
H
L
O
0–3
Z
H
L
OE
2
L
H
H
I
4–7
X
H
L
O
4–7
Z
H
L
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial
Z
=
High Impedance
© 1999 Fairchild Semiconductor Corporation
DS011691
www.fairchildsemi.com
74ABT241
Absolute Maximum Ratings
(Note 1)
Storage Temperature
Ambient Temperature under Bias
Junction Temperature under Bias
V
CC
Pin Potential to Ground Pin
Input Voltage (Note 2)
Input Current (Note 2)
Voltage Applied to Any Output
in the Disabled or
Power-Off State
in the HIGH State
Current Applied to Output
in LOW State (Max)
DC Latchup Source Current
(Over Comm Operating Range)
Over Voltage Latchup (I/O)
−500
mA
10V
twice the rated I
OL
(mA)
−0.5V
to 5.5V
−0.5V
to V
CC
−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
Minimum Input Edge Rate (∆V/∆t)
Data Input
Enable Input
50 mV/ns
20 mV/ns
−40°C
to
+85°C
+4.5V
to
+5.5V
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
Symbol
V
IH
V
IL
V
CD
V
OH
V
OL
I
IH
I
BVI
I
IL
V
ID
I
OZH
I
OZL
I
OS
I
CEX
I
ZZ
I
CCH
I
CCL
I
CCZ
I
CCT
Parameter
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH Voltage
Output LOW Voltage
Input HIGH Current
Input HIGH Current Breakdown Test
Input LOW Current
Input Leakage Test
4.75
2.5
2.0
0.55
1
1
7
−1
−1
Min
2.0
0.8
−1.2
Typ
Max
Units
V
V
V
V
V
V
µA
µA
µA
V
µA
µA
mA
µA
µA
µA
mA
µA
mA
mA
µA
mA/
0.1
MHz
Max
Min
Min
Min
Min
Max
Max
Max
0.0
0
−
5.5V
0
−
5.5V
Max
Max
0.0
Max
Max
Max
V
CC
Conditions
Recognized HIGH Signal
Recognized LOW Signal
I
IN
= −18
mA
I
OH
= −3
mA
I
OH
= −32
mA
I
OL
=
64 mA
V
IN
=
2.7V (Note 4)
V
IN
=
V
CC
V
IN
=
7.0V
V
IN
=
0.5V (Note 4)
V
IN
=
0.0V
I
ID
=
1.9
µA
All Other Pins Grounded
Output Leakage Current
Output Leakage Current
Output Short-Circuit Current
Output High Leakage Current
Bus Drainage Test
Power Supply Current
Power Supply Current
Power Supply Current
−100
10
−10
−275
50
100
50
30
50
Outputs Enabled
Outputs 3-STATE
Outputs 3-STATE
I
CCD
Dynamic I
CC
(Note 4)
No Load
2.5
2.5
50
V
OUT
=
2.7V; OE
n
=
2.0V
V
OUT
=
0.5V; OE
n
=
2.0V
V
OUT
=
0.0V
V
OUT
=
V
CC
V
OUT
=
5.5V; All Others GND
All Outputs HIGH
All Outputs LOW
OE
n
=
V
CC
;
All Others at V
CC
or Ground
Additional I
CC
/Input
V
I
=
V
CC
−
2.1V
Enable Input V
I
=
V
CC
−
2.1V
Data Input V
I
=
V
CC
−
2.1V
All Others at V
CC
or Ground
Max
Outputs Open
OE
n
=
GND, (Note 3)
One Bit Toggling, 50%
Duty Cycle
Note 3:
For 8 bits toggling, I
CCD
<
0.8 mA/MHz.
Note 4:
Guaranteed, but not tested.
www.fairchildsemi.com
2
74ABT241
DC Electrical Characteristics
(SOIC package)
Conditions
Symbol
Parameter
Min
Typ
Max
Units
V
CC
C
L
=
50 pF,
R
L
=
500Ω
V
OLP
V
OLV
V
OHV
V
IHD
V
ILD
Quiet Output Maximum Dynamic V
OL
Quiet Output Minimum Dynamic V
OL
Minimum HIGH Level Dynamic Output Voltage
Minimum HIGH Level Dynamic Input Voltage
Maximum LOW Level Dynamic Input Voltage
−1.3
2.7
2.0
0.5
−0.8
3.1
1.5
1.1
0.8
0.8
V
V
V
V
V
5.0
5.0
5.0
5.0
5.0
T
A
=
25°C (Note 5)
T
A
=
25°C (Note 5)
T
A
=
25°C (Note 7)
T
A
=
25°C (Note 6)
T
A
=
25°C (Note 6)
Note 5:
Max number of outputs defined as (n). n
−
1 data inputs are driven 0V to 3V. One output at LOW. Guaranteed, but not tested.
Note 6:
Max number of data inputs (n) switching. n
−
1 inputs switching 0V to 3V. Input-under-test switching: 3V to threshold (V
ILD
), 0V to threshold (V
IHD
).
Guaranteed, but not tested.
Note 7:
Max number of outputs defined as (n). n
−
1 data inputs are driven 0V to 3V. One output HIGH. Guaranteed, but not tested.
AC Electrical Characteristics
(SOIC and SSOP package)
T
A
= +25°C
V
CC
= +5V
Symbol
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Parameter
Min
Propagation Delay
Data to Outputs
Output Enable
Time
Output Disable
Time
1.0
1.0
1.1
1.3
1.6
1.0
C
L
=
50 pF
Typ
Max
4.6
4.6
6.8
6.8
6.8
5.9
1.0
1.0
1.1
1.3
1.6
1.0
T
A
= −40°C
to
+85°C
V
CC
=
4.5V–5.5V
C
L
=
50 pF
Min
Max
4.6
4.6
6.8
6.8
6.8
5.9
ns
ns
ns
Units
Capacitance
Symbol
C
IN
C
OUT
(Note 8)
Parameter
Input Capacitance
Output Capacitance
Typ
5.0
9.0
Units
pF
pF
V
CC
=
0V
V
CC
=
5.0V
Conditions
T
A
=
25°C
Note 8:
C
OUT
is measured at frequency f
=
1 MHz, per MIL-STD-883, Method 3012.
3
www.fairchildsemi.com
74ABT241
Physical Dimensions
inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
Package Number M20B
www.fairchildsemi.com
4
74ABT241
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M20D
5
www.fairchildsemi.com
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
