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Datasheet> All Categories > logic> logic> DM74ALS240AWMX
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DM74ALS240AWMX

Description
Bus Driver, ALS Series, 2-Func, 4-Bit, Inverted Output, TTL, PDSO20, 0.300 INCH, MS-013, SOIC-20
Categorylogic    logic   
File Size78KB，7 Pages
ManufacturerFairchild
Websitehttp://www.fairchildsemi.com/
Environmental Compliance
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DM74ALS240AWMX Overview

Bus Driver, ALS Series, 2-Func, 4-Bit, Inverted Output, TTL, PDSO20, 0.300 INCH, MS-013, SOIC-20

DM74ALS240AWMX Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
MakerFairchild
Parts packaging codeSOIC
package instruction0.300 INCH, MS-013, SOIC-20
Contacts20
Reach Compliance Codeunknown
Control typeENABLE LOW
seriesALS
JESD-30 codeR-PDSO-G20
JESD-609 codee3
length12.8 mm
Logic integrated circuit typeBUS DRIVER
MaximumI(ol)0.024 A
Humidity sensitivity level1
Number of digits4
Number of functions2
Number of ports2
Number of terminals20
Maximum operating temperature70 °C
Minimum operating temperature
Output characteristics3-STATE
Output polarityINVERTED
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Encapsulate equivalent codeSOP20,.3
Package shapeRECTANGULAR
Package formSMALL OUTLINE
method of packingTAPE AND REEL
Peak Reflow Temperature (Celsius)260
power supply5 V
Maximum supply current (ICC)25 mA
Prop。Delay @ Nom-Sup9 ns
propagation delay (tpd)9 ns
Certification statusNot Qualified
Maximum seat height2.642 mm
Maximum supply voltage (Vsup)5.5 V
Minimum supply voltage (Vsup)4.5 V
Nominal supply voltage (Vsup)5 V
surface mountYES
technologyTTL
Temperature levelCOMMERCIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width7.49 mm

DM74ALS240AWMX Preview

DM74ALS240A • DM74ALS241A Octal 3-STATE Bus Driver
September 1986
Revised February 2000
DM74ALS240A • DM74ALS241A
Octal 3-STATE Bus Driver
General Description
These octal 3-STATE bus drivers are designed to provide
the designer with flexibility in implementing a bus interface
with memory, microprocessor, or communication systems.
The output 3-STATE gating control is organized into two
separate groups of four buffers. The DM74ALS240A con-
trol inputs symmetrically enable the respective outputs
when set logic LOW, while the DM74ALS241A has comple-
mentary enable gating. The 3-STATE circuitry contains a
feature that maintains the buffer outputs in 3-STATE (high
impedance state) during power supply ramp-up or ramp-
down. This eliminates bus glitching problems that arise
during power-up and power-down.
Features
s
Advanced low power
Schottky TTL process
oxide-isolated
ion-implanted
s
Functional and pin compatible with the DM74LS coun-
terpart
s
Improved switching performance with less power dissi-
pation compared with the DM74LS counterpart
s
Switching response specified into 500Ω and 50 pF load
s
Switching response specifications guaranteed over full
temperature and V
CC
supply range
s
PNP input design reduces input loading
s
Low level drive current: 74ALS
=
24 mA
Ordering Code:
Order Number
DM74ALS240AWM
DM74ALS240ASJ
DM74ALS240AN
DM74ALS241AWM
DM74ALS241AN
Package Number
M20B
M20D
N20A
M20B
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
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagrams
DM74ALS240A
DM74ALS241A
© 2000 Fairchild Semiconductor Corporation
DS006210
www.fairchildsemi.com
DM74ALS240A • DM74ALS241A
Function Tables
DM74ALS240A
Input
G
L
L
H
A
L
H
X
Output
Y
H
L
Z
1G
L
L
H
Input
1A
L
H
X
DM74ALS241A
Output
Y
L
H
Z
2G
H
H
L
Input
2A
L
H
X
Output
Y
L
H
Z
Logic Diagrams
DM74ALS240A
DM74ALS241A
www.fairchildsemi.com
2
DM74ALS240A • DM74ALS241A
Absolute Maximum Ratings
(Note 1)
Supply Voltage, V
CC
Input Voltage
Voltage Applied to Disabled Output
Operating Free Air Temperature Range
Storage Temperature Range
Typical
θ
JA
N Package
M Package
60.5°C/W
79.8°C/W
7V
7V
5.5V
0°C to
+70°C
−65°C
to
+150°C
Note 1:
The “Absolute Maximum Ratings” are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
Recommended Operating Conditions
Symbol
V
CC
V
IH
V
IL
I
OH
I
OL
T
A
Supply Voltage
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Current
LOW Level Output Current
Operating Free Air Temperature
0
Parameter
Min
4.5
2
0.8
−15
24
70
Typ
5
Max
5.5
Units
V
V
V
mA
mA
°C
Electrical Characteristics
over recommended operating free-air temperature range (unless otherwise specified)
Symbol
V
IK
V
OH
Parameter
Input Clamp Voltage
HIGH Level
Output Voltage
V
OL
I
I
I
IH
I
IL
I
O
I
OZH
I
OZL
I
CC
LOW Level
Output Voltage
Input Current at Max
Input Voltage
HIGH Level Input Current
LOW Level Input Current
Output Drive Current
HIGH Level 3-STATE
Output Current
LOW Level 3-STATE
Output Current
Supply Current
V
CC
=
4.5V to 5.5V
V
CC
=
4.5V
V
CC
=
4.5V
I
OL
=
Max
V
CC
=
5.5V, V
I
=
7V
V
CC
=
5.5V, V
I
=
2.7V
V
CC
=
5.5V, V
IL
=
0.4V
V
CC
=
5.5V, V
O
=
2.25V
V
CC
=
5.5V, V
O
=
2.7V
V
CC
=
5.5V, V
O
=
0.4V
V
CC
=
5.5V, ALS240A
Outputs HIGH
Outputs LOW
Outputs 3-STATE
V
CC
=
5.5V, ALS241A
Outputs HIGH
Outputs LOW
Outputs 3-STATE
4
13
14
9
15
17
−30
Conditions
V
CC
=
4.5V, I
I
= −18
mA
I
OH
= −0.4
mA
I
OH
= −3
mA
I
OH
=
Max
V
CC
−
2
2.4
2
0.35
0.5
0.1
20
−0.1
−112
20
−20
10
23
25
15
26
30
Min
Typ
Max
−1.5
Units
V
V
V
V
V
mA
µA
mA
mA
µA
µA
mA
mA
mA
mA
mA
mA
3
www.fairchildsemi.com
DM74ALS240A • DM74ALS241A
Switching Characteristics DM74ALS240A
over recommended operating free air temperature range
Symbol
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Parameter
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Output Enable Time
to HIGH Level Output
Output Enable Time
to LOW Level Output
Output Disable Time
from HIGH Level Output
Output Disable Time
from LOW Level Output
G
Y
3
12
ns
Conditions
V
CC
=
4.5V to 5.5V,
C
L
=
50 pF,
R1
=
500Ω,
R2
=
500Ω,
T
A
=
Min to Max
G
Y
3
2
18
10
ns
ns
A
Y
2
3
9
13
ns
ns
From
(Input)
To
(Output)
Min
2
Max
9
Units
ns
Switching Characteristics DM74ALS241A
over recommended operating free air temperature range
Symbol
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
PZH
t
PZL
t
PHZ
t
PLZ
Parameter
Propagation Delay Time
LOW-to-HIGH Level Output
Propagation Delay Time
HIGH-to-LOW Level Output
Output Enable Time
to HIGH Level Output
Output Enable Time
to HIGH Level Output
Output Disable Time
to HIGH Level Output
Output Disable Time
to LOW Level Output
Output Enable Time
to HIGH Level Output
Output Enable Time
to LOW Level Output
Output Disable Time
from HIGH Level Output
Output Disable Time
from LOW Level Output
2G
Y
3
15
ns
2G
Y
7
2
21
10
ns
ns
1G
Y
3
7
15
21
ns
ns
Conditions
V
CC
=
4.5V to 5.5V,
C
L
=
50 pF,
R1
=
500Ω,
R2
=
500Ω,
T
A
=
Min to Max
1G
Y
3
2
21
10
ns
ns
A
Y
3
3
10
21
ns
ns
From
(Input)
To
(Output)
Min
3
Max
11
Units
ns
www.fairchildsemi.com
4
DM74ALS240A • DM74ALS241A
Physical Dimensions
inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
Package Number M20B
5
www.fairchildsemi.com
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