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DM74123N の電気的特性と機能

DM74123NのメーカーはFairchild Semiconductorです、この部品の機能は「Dual Retriggerable One-Shot with Clear and Complementary Outputs」です。


製品の詳細 ( Datasheet PDF )

部品番号 DM74123N
部品説明 Dual Retriggerable One-Shot with Clear and Complementary Outputs
メーカ Fairchild Semiconductor
ロゴ Fairchild Semiconductor ロゴ 




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DM74123N Datasheet, DM74123N PDF,ピン配置, 機能
August 1986
Revised March 2000
DM74123
Dual Retriggerable One-Shot with
Clear and Complementary Outputs
General Description
The DM74123 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. A LOW at the clear (CLR)
input terminates the output pulse: which also inhibits trig-
gering. An internal connection from CLR to the input gate
makes it possible to trigger the circuit by a positive-going
signal on CLR as shown in the Truth Table.
To obtain the best and trouble free operation from this
device please read the Operating Rules as well as the
One–Shot Application Notes carefully and observe recom-
mendations.
Features
s DC triggered from active-HIGH transition or active-LOW
transition inputs
s Retriggerable to 100% duty cycle
s Direct reset terminates output pulse
s Compensated for VCC and temperature variations
s DTL, TTL compatible
s Input clamp diodes
Ordering Code:
Order Number Package Number
Package Description
DM74123N
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Connection Diagram
Triggering Truth Table
Inputs
AB
XX
L
H
H
L
LH
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
CLR
L
X
H
X
H
Response
No Trigger
No Trigger
Trigger
No Trigger
Trigger
Trigger
Functional Description
The basic output pulse width is determined by selection of
an external resistor (RX) and capacitor (CX). Once trig-
gered, the basic pulse width may be extended by retrigger-
ing the gated active-LOW transition or active-HIGH
transition inputs or be reduced by use of the active-LOW
transition clear input. Retriggering to 100% duty cycle is
possible by application of an input pulse train whose cycle
time is shorter than the output cycle time such that a con-
tinuous “HIGH” logic state is maintained at the “Q” output.
© 2000 Fairchild Semiconductor Corporation DS006539
www.fairchildsemi.com

1 Page





DM74123N pdf, ピン配列
Absolute Maximum Ratings(Note 1)
Supply Voltage
7V
Input Voltage
5.5V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature
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
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
TWQ
(Min)
Minimum Width of
Pulse at Q (Note 2)
A or B
REXT
External Timing Resistor
CEXT
External Timing Capacitance
CWIRE
Wiring Capacitance
at REXT/CEXT Terminal (Note 2)
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
0.8
16
65
50
50
70
Units
V
V
V
mA
mA
ns
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 = −12 mA
VOH HIGH Level
VCC = Min, IOH = Max
Output Voltage
VIL = Max, VIH = Min
VOL LOW Level
VCC = Min, IOL = Max
Output Voltage
VIH = Min, VIL = Max
II Input Current @ Max Input Voltage VCC = Max, VI = 5.5V
IIH HIGH Level
VCC = Max
Input Current
VI = 2.4V
IIL Low Level
VCC = Max, VI = 0.4V
Input Current
1.5
V
2.5 3.4
V
Data
Clear
Clear
Data
0.2 0.4
V
1
40
80
3.2
1.6
mA
µA
mA
IOS Short Circuit Output Current
ICC Supply Current
Note 3: All typicals are at VCC = 5V, TA = 25°C.
VCC = Max (Note 4)
VCC = Max (Note 5)(Note 6)
10 40 mA
46 66 mA
Note 4: Not more than one output should be shorted at a time.
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.
3 www.fairchildsemi.com


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共有リンク

Link :


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Dual Retriggerable One-Shot with Clear and Complementary Outputs

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