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DM74LS123N 데이터시트 PDF




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부품번호 DM74LS123N 기능
기능 Dual Retriggerable One-Shot with Clear and Complementary Outputs
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DM74LS123N 데이터시트, 핀배열, 회로
August 1986
Revised April 2000
DM74LS123
Dual Retriggerable One-Shot
with Clear and Complementary Outputs
General Description
The DM74LS123 is a dual retriggerable monostable multi-
vibrator capable of generating output pulses from a few
nano-seconds to extremely long duration up to 100% duty
cycle. Each device has three inputs permitting the choice of
either leading edge or trailing edge triggering. Pin (A) is an
active-LOW transition trigger input and pin (B) is an active-
HIGH transition trigger input. The clear (CLR) input termi-
nates the output pulse at a predetermined time indepen-
dent of the timing components. The clear input also serves
as a trigger input when it is pulsed with a low level pulse
transition ( ). To obtain the best trouble free operation
from this device please read the operating rules as well as
the Fairchild Semiconductor one-shot application notes
carefully and observe recommendations.
Features
s DC triggered from active-HIGH transition or active-LOW
transition inputs
s Retriggerable to 100% duty cycle
s Compensated for VCC and temperature variations
s Triggerable from CLEAR input
s DTL, TTL compatible
s Input clamp diodes
Ordering Code:
Order Number Package Number
Package Description
DM74LS123M
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow
DM74LS123SJ
M16D
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
DM74LS123N
N16E
16-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 Diagram
Function Table
Inputs
CLEAR
A
LX
XH
XX
HL
H
L
H = HIGH Logic Level
L = LOW Logic Level
X = Can Be Either LOW or HIGH
↑ = Positive Going Transition
↓ = Negative Going Transition
= A Positive Pulse
= A Negative Pulse
B
X
X
L
H
H
Outputs
QQ
LH
LH
L H
© 2000 Fairchild Semiconductor Corporation DS006386
www.fairchildsemi.com




DM74LS123N pdf, 반도체, 판매, 대치품
Absolute Maximum Ratings(Note 1)
Supply Voltage
7V
Input Voltage
7V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature
65°C to +150°C
Note 1: The Absolute Maximum Ratingsare 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 Conditionstable will define the conditions
for actual device operation.
Recommended Operating Conditions
Symbol
Parameter
VCC Supply Voltage
VIH HIGH Level Input Voltage
VIL LOW Level Input Voltage
IOH HIGH Level Output Current
IOL LOW Level Output Current
tW Pulse Width
A or B HIGH
(Note 2)
A or B LOW
Clear LOW
REXT
External Timing Resistor
CEXT
External Timing Capacitance
CWIRE
Wiring Capacitance at REXT/CEXT Terminal
TA Free Air Operating Temperature
Note 2: TA = 25°C and VCC = 5V.
Min
4.75
2
40
40
40
5
0
Nom
5
No Restriction
Max
5.25
0.8
0.4
8
260
50
70
Units
V
V
V
mA
mA
ns
k
µF
pF
°C
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Typ
Min Max
(Note 3)
Units
VI Input Clamp Voltage
VCC = Min, II = −18 mA
1.5 V
VOH HIGH Level
Output Voltage
VCC = Min, IOH = Max
VIL = Max, VIH = Min
2.7 3.4
V
VOL LOW Level
Output Voltage
VCC = Min, IOL = Max
VIL = Max, VIH = Min
0.35
0.5
V
IOL = 4 mA, VCC = Min
0.25
0.4
II
Input Current @ Max Input Voltage
VCC = Max, VI = 7V
0.1 mA
IIH HIGH Level Input Current
VCC = Max, VI = 2.7V
20 µA
IIL LOW Level Input Current
VCC = Max, VI = 0.4V
0.4 mA
IOS Short Circuit Output Current
VCC = Max (Note 4)
20
100
mA
ICC Supply Current
VCC = Max (Note 5)(Note 6)(Note 7)
12 20 mA
Note 3: All typicals are at VCC = 5V, TA = 25°C.
Note 4: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 5: Quiescent ICC is measured (after clearing) with 2.4V applied to all clear and A inputs, B inputs grounded, all outputs OPEN, CEXT = 0.02 µF,
and REXT = 25 k.
Note 6: ICC is measured in the triggered state with 2.4V applied to all clear and B inputs, A inputs grounded, all outputs OPEN, CEXT = 0.02 µF,
and REXT = 25 k.
Note 7: With all outputs OPEN and 4.5V applied to all data and clear inputs, ICC is measured after a momentary ground, then 4.5V is applied to the clock.
www.fairchildsemi.com
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DM74LS123N 전자부품, 판매, 대치품
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M16D
7 www.fairchildsemi.com

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