Fairchild DM74ALS240ASJ Octal 3-state bus driver Datasheet

DM74ALS240A, DM74ALS241A
Octal 3-STATE Bus Driver
tm
Features
General Description
■ Advanced low power oxide-isolated ion-implanted
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 control inputs symmetrically enable
the respective outputs when set logic LOW, while the
DM74ALS241A has complementary 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.
■
■
■
■
■
■
Schottky TTL process
Functional and pin compatible with the DM74LS
counterpart
Improved switching performance with less power
dissipation compared with the DM74LS counterpart
Switching response specified into 500Ω and 50pF
load
Switching response specifications guaranteed over
full temperature and VCC supply range
PNP input design reduces input loading
Low level drive current: 74ALS = 24mA
Ordering Information
Order Number
Package
Number
Package Description
DM74ALS240AWM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
DM74ALS240ASJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
DM74ALS240AN
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
DM74ALS241AWM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
DM74ALS240A
©1986 Fairchild Semiconductor Corporation
DM74ALS240A, DM74ALS241A Rev. 1.3
DM74ALS241A
www.fairchildsemi.com
DM74ALS240A, DM74ALS241A Octal 3-STATE Bus Driver
September
2007
DM74ALS240A
Input
DM74ALS241A
Output
Input
Output
Input
Output
G
A
Y
1G
1A
Y
2G
2A
Y
L
L
H
L
L
L
H
L
L
L
H
L
L
H
H
H
H
H
H
X
Z
H
X
Z
L
X
Z
Logic Diagrams
DM74ALS240A
©1986 Fairchild Semiconductor Corporation
DM74ALS240A, DM74ALS241A Rev. 1.3
DM74ALS241A
www.fairchildsemi.com
2
DM74ALS240A, DM74ALS241A Octal 3-STATE Bus Driver
Function Tables
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended.
In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.
The absolute maximum ratings are stress ratings only.
Symbol
VCC
VI
Parameter
Rating
Supply Voltage
7V
Input Voltage
7V
Voltage Applied to Disabled Output
TA
5.5V
Operating Free Air Temperature Range
TSTG
Storage Temperature Range
θJA
Typical Thermal Resistance
0°C to +70°C
–65°C to +150°C
N Package
60.5°C/W
M Package
79.8°C/W
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended
operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not
recommend exceeding them or designing to absolute maximum ratings.
Symbol
VCC
Parameter
Supply Voltage
Min.
Typ.
Max.
Units
4.5
5
5.5
V
VIH
HIGH Level Input Voltage
VIL
LOW Level Input Voltage
0.8
V
IOH
HIGH Level Output Current
–15
mA
IOL
LOW Level Output Current
24
mA
TA
Operating Free Air Temperature
70
°C
©1986 Fairchild Semiconductor Corporation
DM74ALS240A, DM74ALS241A Rev. 1.3
2
0
V
www.fairchildsemi.com
3
DM74ALS240A, DM74ALS241A Octal 3-STATE Bus Driver
Absolute Maximum Ratings
Over recommended operating free-air temperature range (unless otherwise specified).
Symbol
Parameter
VIK
Input Clamp Voltage
VOH
HIGH Level Output Voltage
Conditions
Min.
Typ. Max.
VCC = 4.5V, II = –18mA
–1.5
VCC = 4.5V to 5.5V, IOH = –0.4mA
VCC = 4.5V
VCC – 2
IOH = –3mA
2.4
IOH = Max.
2
Units
V
V
VOL
LOW Level Output Voltage
VCC = 4.5V, IOL = Max.
0.5
V
II
Input Current at Max. Input
Voltage
VCC = 5.5V, VI = 7V
0.1
mA
IIH
HIGH Level Input Current
VCC = 5.5V, VI = 2.7V
20
µA
IIL
LOW Level Input Current
VCC = 5.5V, VIL = 0.4V
IO
Output Drive Current
VCC = 5.5V, VO = 2.25V
IOZH
HIGH Level 3-STATE Output
Current
IOZL
ICC
0.35
–0.1
mA
–112
mA
VCC = 5.5V, VO = 2.7V
20
µA
LOW Level 3-STATE Output
Current
VCC = 5.5V, VO = 0.4V
–20
µA
Supply Current
VCC = 5.5V, ALS240A, Outputs HIGH
4
10
mA
Outputs LOW
13
23
Outputs 3-STATE
14
25
VCC = 5.5V, ALS241A, Outputs HIGH
9
15
Outputs LOW
15
26
Outputs 3-STATE
17
30
©1986 Fairchild Semiconductor Corporation
DM74ALS240A, DM74ALS241A Rev. 1.3
–30
www.fairchildsemi.com
4
DM74ALS240A, DM74ALS241A Octal 3-STATE Bus Driver
Electrical Characteristics
Symbol
Parameter
tPLH
Propagation Delay Time,
LOW-to-HIGH Level Output
tPHL
Propagation Delay Time,
HIGH-to-LOW Level Output
tPZH
Output Enable Time to HIGH
Level Output
tPZL
Output Enable Time to LOW
Level Output
tPHZ
Output Disable Time from
HIGH Level Output
tPLZ
Output Disable Time from
LOW Level Output
Conditions
VCC = 4.5V to 5.5V,
CL = 50pF,
R1 = 500Ω,
R2 = 500Ω,
TA = Min. to Max.
From
(Input)
To
(Output)
Min.
Max.
Units
A
Y
2
9
ns
2
9
ns
3
13
ns
3
18
ns
2
10
ns
3
12
ns
G
G
Y
Y
Switching Characteristics DM74ALS241A
Over recommended operating free air temperature range.
Symbol
tPLH
tPHL
tPZH
Parameter
Conditions
VCC = 4.5V to 5.5V,
CL = 50pF,
R1
= 500Ω,
Propagation Delay Time,
R2
= 500Ω,
HIGH-to-LOW Level Output
T
=
Output Enable Time to HIGH A Min. to Max.
Level Output
Propagation Delay Time,
LOW-to-HIGH Level Output
tPZL
Output Enable Time to HIGH
Level Output
tPHZ
Output Disable Time to HIGH
Level Output
tPLZ
Output Disable Time to LOW
Level Output
tPZH
Output Enable Time to HIGH
Level Output
tPZL
Output Enable Time to LOW
Level Output
tPHZ
Output Disable Time from
HIGH Level Output
tPLZ
Output Disable Time from
LOW Level Output
©1986 Fairchild Semiconductor Corporation
DM74ALS240A, DM74ALS241A Rev. 1.3
From
(Input)
To
(Output)
Min.
Max.
Units
A
Y
3
11
ns
3
10
ns
3
21
ns
3
21
ns
2
10
ns
3
15
ns
7
21
ns
7
21
ns
2
10
ns
3
15
ns
1G
1G
2G
2G
Y
Y
Y
Y
www.fairchildsemi.com
5
DM74ALS240A, DM74ALS241A Octal 3-STATE Bus Driver
Switching Characteristics DM74ALS240A
Over recommended operating free air temperature range.
DM74ALS240A, DM74ALS241A Octal 3-STATE Bus Driver
Physical Dimensions
Dimensions are in millimeters unless otherwise noted.
Figure 1. 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
Package Number M20B
©1986 Fairchild Semiconductor Corporation
DM74ALS240A, DM74ALS241A Rev. 1.3
www.fairchildsemi.com
6
DM74ALS240A, DM74ALS241A Octal 3-STATE Bus Driver
Physical Dimensions (Continued)
Dimensions are in millimeters unless otherwise noted.
Figure 2. 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M20D
©1986 Fairchild Semiconductor Corporation
DM74ALS240A, DM74ALS241A Rev. 1.3
www.fairchildsemi.com
7
DM74ALS240A, DM74ALS241A Octal 3-STATE Bus Driver
Physical Dimensions (Continued)
Dimensions are in inches (millimeters) unless otherwise noted.
Figure 3. 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
Package Number N20A
©1986 Fairchild Semiconductor Corporation
DM74ALS240A, DM74ALS241A Rev. 1.3
www.fairchildsemi.com
8
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PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification
Product Status
Advance Information
Formative or In Design
This datasheet contains the design specifications for product
development. Specifications may change in any manner without notice.
Definition
Preliminary
First Production
This datasheet contains preliminary data; supplementary data will be
published at a later date. Fairchild Semiconductor reserves the right to
make changes at any time without notice to improve design.
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Not In Production
This datasheet contains specifications on a product that has been
discontinued by Fairchild Semiconductor. The datasheet is printed for
reference information only.
Rev. I31
©1986 Fairchild Semiconductor Corporation
DM74ALS240A, DM74ALS241A Rev. 1.3
www.fairchildsemi.com
9
DM74ALS240A, DM74ALS241A Octal 3-STATE Bus Driver
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