74LS241 PDF даташит
Спецификация 74LS241 изготовлена «Fairchild Semiconductor» и имеет функцию, называемую «Octal 3-STATE Buffer/Line Driver/Line Receiver». |
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Детали детали
Номер произв | 74LS241 |
Описание | Octal 3-STATE Buffer/Line Driver/Line Receiver |
Производители | Fairchild Semiconductor |
логотип |
7 Pages
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August 1986
Revised March 2000
DM74LS240 • DM74LS241
Octal 3-STATE Buffer/Line Driver/Line Receiver
General Description
These buffers/line drivers are designed to improve both the
performance and PC board density of 3-STATE buffers/
drivers employed as memory-address drivers, clock driv-
ers, and bus-oriented transmitters/receivers. Featuring
400 mV of hysteresis at each low current PNP data line
input, they provide improved noise rejection and high
fanout outputs and can be used to drive terminated lines
down to 133Ω.
Features
s 3-STATE outputs drive bus lines directly
s PNP inputs reduce DC loading on bus lines
s Hysteresis at data inputs improves noise margins
s Typical IOL (sink current)
24 mA
s Typical IOH (source current)
−15 mA
s Typical propagation delay times
Inverting
10.5 ns
Noninverting 12 ns
s Typical enable/disable time 18 ns
s Typical power dissipation (enabled)
Inverting
130 mW
Noninverting 135 mW
Ordering Code:
Order Number Package Number
Package Description
DM74LS240WM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
DM74LS240SJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
DM74LS240N
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
DM74LS241WM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
DM74LS241N
N20A
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
DM74LS240
© 2000 Fairchild Semiconductor Corporation DS006411
DM74LS241
www.fairchildsemi.com
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Function Tables
DM74LS240
Inputs
GA
LL
LH
HX
Output
Y
H
L
Z
L = LOW Logic Level
H = HIGH Logic Level
X = Either LOW or HIGH Logic Level
Z = High Impedance
DM74LS241
Inputs
Outputs
G G 1A 2A 1Y 2Y
XLLXL
X L HXH
XHXXZ
HXX L
L
HXXH
H
LXXX
Z
www.fairchildsemi.com
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Absolute Maximum Ratings(Note 1)
Supply Voltage
7V
Input Voltage
7V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range
−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
VCC
VIH
VIL
IOH
IOL
TA
Parameter
Supply Voltage
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Current
LOW Level Output Current
Free Air Operating Temperature
Min
4.75
2
0
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
VI
HYS
VOH
Input Clamp Voltage
Hysteresis (VT+ − VT−)
Data Inputs Only
HIGH Level Output Voltage
VOL LOW Level Output Voltage
IOZH
IOZL
II
IIH
IIL
IOS
ICC
Off-State Output Current,
HIGH Level Voltage Applied
Off-State Output Current,
LOW Level Voltage Applied
Input Current at Maximum
Input Voltage
HIGH Level Input Current
LOW Level Input Current
Short Circuit Output Current
Supply Current
VCC = Min, II = −18 mA
VCC = Min
VCC = Min, VIH = Min
VIL = Max, IOH = −1 mA
VCC = Min, VIH = Min
VIL = Max, IOH = −3 mA
VCC = Min, VIH = Min
VIL = 0.5V, IOH = Max
VCC = Min
IOL = 12 mA
VIL = Max
VIH = Min
IOL = Max
VCC = Max
VIL = Max
VO = 2.7V
VIH = Min
VO = 0.4V
VCC = Max
VI = 7V
VCC = Max, VI = 2.7V
VCC = Max, VI = 0.4V
VCC = Max (Note 3)
VCC = Max,
Outputs HIGH
Outputs OPEN
Outputs LOW
Nom
5
Min
0.2
2.7
2.4
2
−40
Outputs Disabled
Note 2: All typicals are at VCC = 5V, TA = 25°C.
Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Max
Units
5.25
V
V
0.8 V
−15 mA
24 mA
70 °C
Typ
(Note 2)
0.4
Max
−1.5
Units
V
V
3.4 V
0.4
V
0.5
20 µA
−20 µA
0.1 mA
20 µA
−0.2
mA
−225
mA
13 23
26 44
27 46 mA
29 50
32 54
3 www.fairchildsemi.com
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