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National Semiconductor Electronic Components Datasheet

CD4538BM Datasheet

Dual Precision Monostable

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February 1988
CD4538BM CD4538BC Dual Precision Monostable
General Description
The CD4538B is a dual precision monostable multivibrator
with independent trigger and reset controls The device is
retriggerable and resettable and the control inputs are inter-
nally latched Two trigger inputs are provided to allow either
rising or falling edge triggering The reset inputs are active
low and prevent triggering while active Precise control of
output pulse-width has been achieved using linear CMOS
techniques The pulse duration and accuracy are deter-
mined by external components RX and CX The device does
not allow the timing capacitor to discharge through the tim-
ing pin on power-down condition For this reason no exter-
nal protection resistor is required in series with the timing
pin Input protection from static discharge is provided on all
pins
Features
Y Wide supply voltage range
3 0V to 15V
Y High noise immunity
Y Low power
TTL compatibility
0 45 VCC (typ )
Fan out of 2 driving 74L
or 1 driving 74LS
Y New formula PWOUT e RC
(PW in seconds R in Ohms C in Farads)
Y g1 0% pulse-width variation from part to part (typ )
Y Wide pulse-width range
1 ms to %
Y Separate latched reset inputs
Y Symmetrical output sink and source capability
Y Low standby current
Y Pin compatible to CD4528B
5 nA (typ )
5 VDC
Block and Connection Diagrams
Dual-In-Line Package
CD4538BM
CD4538BC
Top View
Order Number CD4538B
RX and CX are External Components
VDD e Pin 16
VSS e Pin 8
Truth Table
TL F 6000 – 1
Inputs
Clear A
LX
XH
XX
HL
Hu
B
X
X
L
v
H
Outputs
QQ
LH
LH
LH
H e High Level
L e Low Level
u e Transition from Low to High
v e Transition from High to Low
e One High Level Pulse
e One Low Level Pulse
X e Irrelevant
TL F 6000 – 2
C1995 National Semiconductor Corporation TL F 6000
RRD-B30M105 Printed in U S A


National Semiconductor Electronic Components Datasheet

CD4538BM Datasheet

Dual Precision Monostable

No Preview Available !

Absolute Maximum Ratings (Notes 1 and 2)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
DC Supply Voltage (VDD)
b0 5 to a18 VDC
Input Voltage (VIN)
b0 5V to VDD a 0 5 VDC
Storage Temperature Range (TS)
b65 C to a150 C
Power Dissipation (PD)
Dual-In-Line
700 mW
Small Outline
500 mW
Lead Temperature (TL)
(Soldering 10 seconds)
260 C
Recommended Operating
Conditions (Note 2)
DC Supply Voltage (VDD)
3 to 15 VDC
Input Voltage (VIN)
0 to VDD VDC
Operating Temperature Range (TA)
CD4538BM
CD4538BC
b55 C to a125 C
b40 C to a85 C
DC Electrical Characteristics CD4538BM (Note 2)
Symbol Parameter
Conditions
b55 C
Min Max
a25 C
Min Typ Max
a125 C
Units
Min Max
(IDD Quiescent VDD e 5V VIH e VDD
Device Current VDD e 10V VIL e VSS
VDD e 15V All Outputs Open
5 0 005 5 150 mA
10 0 010 10 300 mA
20 0 015 20 600 mA
( l lVOL
Low Level
VDD e 5V
Output Voltage VDD e 10V
VDD e 15V
IO k 1 mA
VIH e VDD VIL e VSS
0 05
0 05
0 05
0 0 05
0 0 05
0 0 05
0 05 V
0 05 V
0 05 V
( l lVOH
High Level
VDD e 5V
Output Voltage VDD e 10V
VDD e 15V
IO k 1 mA
VIH e VDD VIL e VSS
4 95
9 95
14 95
4 95
9 95
14 95
5
10
15
4 95
9 95
14 95
V
V
V
l lVIL Low Level IO k 1 mA
Input Voltage VDD e 5V VO e 0 5V or 4 5V
VDD e 10V VO e 1 0V or 9 0V
VDD e 15V VO e 1 5V or 13 5V
15
2 25 1 5
15 V
30
4 50 3 0
30 V
40
6 75 4 0
40 V
l lVIH High Level IO k 1 mA
Input Voltage VDD e 5V VO e 0 5V or 4 5V
VDD e 10V VO e 1 0V or 9 0V
VDD e 15V VO e 1 5V or 13 5V
35
70
11 0
3 5 2 75
7 0 5 50
11 0 8 25
35 V
70 V
11 0 V
(IOL
Low Level
VDD e 5V VO e 0 4V
Output Current VDD e 10V VO e 0 5V
(Note 3)
VD e 15V VO e 1 5V
VIH e VDD
VIL e VSS
0 64
16
42
0 51 0 88
1 3 2 25
34 88
0 36 mA
0 9 mA
2 4 mA
(IOH
High Level
VDD e 5V VO e 4 6V
Output Current VDD e 10V VO e 9 5V
(Note 3)
VD e 15V VO e 13 5V
b0 64
VIH e VDD
VIL e VSS
b1 6
b4 2
b0 51 b0 88
b1 3 b2 25
b3 4 b8 8
b0 36
b0 9
b2 4
mA
mA
mA
IIN Input Current VDD e 15V VIN e 0V or 15V
Pin 2 or 14
g0 02
g10b5 g0 05
g0 5 mA
IIN Input Current VDD e 15V VIN e 0V or 15V
Other Inputs
g0 1
g10b5 g0 1
g1 0 mA
Note 1 ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed they are not meant to imply that the devices
should be operated at these limits The tables of ‘‘Recommended Operating Conditions’’ and ‘‘Electrical Characteristics’’ provide conditions for acutal device
operation
Note 2 VSS e 0V unless otherwise specified
Note 3 IOH and IOL are tested one output at a time
2


Part Number CD4538BM
Description Dual Precision Monostable
Maker National Semiconductor
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CD4538BM Datasheet PDF






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