datasheet4u.com

900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




National Semiconductor Electronic Components Datasheet

DM54122 Datasheet

Retriggerable Resettable Multivibrator

No Preview Available !

DM54122 pdf
June 1989
54122 DM74122
Retriggerable Resettable Multivibrator
General Description
The ’122 features positive and negative DC level triggering
inputs complementary outputs an optional 10 kX internal
timing resistor and an overriding Direct Clear (CD) input
When the circuit is in the quasi-stable (delay) state another
trigger applied to the inputs (per Truth Table) will cause the
delay period to start again without disturbing the outputs
This process can be repeated indefinitely and thus the out-
put pulse period (Q HIGH Q LOW) can be made as long as
desired Alternatively a delay period can be terminated
by a LOW signal applied to CD which also prevents trigger-
ing An internal connection from CD to the input gate makes
it possible to trigger the circuit by a positive-going signal on
CD as shown in the Truth Table For timing capacitor values
greater than 1000 pF the output pulse width is defined as
follows
tw e 0 32 RXCX (1 0 a 0 7 RX)
Where tw is in ns RX is in kX and CX is in pF
Connection Diagram
Logic Symbol
Dual-In-Line Package
TL F 10212 – 1
Order Number 54122DMQB 54122FMQB or DM74122N
See NS Package Number J14A N14A or W14B
VCC e Pin 14
GND e Pin 7
NC e Pins 10 and 12
Pin Names
A1 A2
B1 B2
CD
QQ
Description
Trigger Inputs (Active Falling Edge)
Trigger Inputs (Active Rising Edge)
Direct Clear Inputs (Active LOW)
Outputs
TL F 10212 – 2
C1995 National Semiconductor Corporation TL F 10212
RRD-B30M105 Printed in U S A


National Semiconductor Electronic Components Datasheet

DM54122 Datasheet

Retriggerable Resettable Multivibrator

No Preview Available !

DM54122 pdf
Absolute Maximum Ratings (Note)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage
7V
Input Voltage
5 5V
Operating Free Air Temperature Range
54 b55 C to a125 C
DM74
0 C to a70 C
Storage Temperature Range
b65 C to a150 C
Note The ‘‘Absolute Maximum Ratings’’ are those values
beyond which the safety of the device cannot be guaran-
teed The device should not be operated at these limits The
parametric values defined in the ‘‘Electrical Characteristics’’
table 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
45
2
b55
54122
Nom
5
Max
55
08
b0 8
16
125
Min
4 75
2
b55
DM74122
Nom
5
Max
55
08
b0 8
16
70
Units
V
V
V
mA
mA
C
Recommended Operating Conditions VCC e a5 0V TA e a25 C
Symbol
Parameter
Conditions
DM74
Min Max
tw Trigger Pulse Width
40
RX
External Timing Resistor
XC
Over Operating VCC and
50
50
XM Temperature Range
5 0 25
CX External Timing Capacitor
No Restrictions
Units
ns
kX
pF
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
VI
VOH
VOL
II
Input Clamp Voltage
High Level Output Voltage
Low Level Output Voltage
Input Current Max
Input Voltage
VCC e Min II e b12 mA
VCC e Min IOH e Max
VIL e Max
VCC e Min VIH e Min
VCC e Max VI e 5 5V
24
IIH
High Level Input Current
VCC e Max VI e 2 4V
Inputs
Clear
IIL
Low Level Input Current
VCC e Max VI e 0 4V
Inputs
Clear
IOS
Short Circuit Output Current
VCC e Max (Note 2)
b10
ICC Supply Current
VCC e Max
Note 1 All typicals are at VCC e 5V TA e 25 C
Note 2 Not more than one output should be shorted at a time and the duration should not exceed one second
Typ
(Note 1)
Max
b1 5
04
1
40
80
b1 6
b3 2
b40
28
Units
V
V
V
mA
mA
mA
mA
mA
2


Part Number DM54122
Description Retriggerable Resettable Multivibrator
Maker National Semiconductor
Total Page 6 Pages
PDF Download
DM54122 pdf
DM54122 Datasheet PDF
[partsNo] view html
View PDF for Mobile








Similar Datasheet

1 DM54121 One-Shot with Clear and Complementary Outputs National Semiconductor
National Semiconductor
DM54121 pdf
2 DM54122 Retriggerable Resettable Multivibrator National Semiconductor
National Semiconductor
DM54122 pdf
3 DM54123 Dual Retriggerable One-Shot with Clear and Complementary Outputs National Semiconductor
National Semiconductor
DM54123 pdf
4 DM54123 DM54123/DM74123 Dual Retrigger 1-Shot w/Clear Complementary Outputs (Rev. A) Texas Instruments
Texas Instruments
DM54123 pdf
5 DM54125 Quad TRI-STATE Buffers National Semiconductor
National Semiconductor
DM54125 pdf
6 DM54125 Quad TRI-STATE(RM) Buffers (Rev. A) Texas Instruments
Texas Instruments
DM54125 pdf





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy