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National Semiconductor Electronic Components Datasheet

CD4541BC Datasheet

Programmable Timer

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February 1988
CD4541BM CD4541BC Programmable Timer
General Description
The CD4541B Programmable Timer is designed with a
16-stage binary counter an integrated oscillator for use with
an external capacitor and two resistors output control logic
and a special power-on reset circuit The special features of
the power-on reset circuit are first no additional static pow-
er consumption and second the part functions across the
full voltage range (3V–15V) whether power-on reset is en-
abled or disabled
Timing and the counter are initialized by turning on power if
the power-on reset is enabled When the power is already
on an external reset pulse will also initialize the timing and
counter After either reset is accomplished the oscillator
frequency is determined by the external RC network The
16-stage counter divides the oscillator frequency by any of 4
digitally controlled division ratios
Features
Y Available division ratios 28 210 213 or 216
Y Increments on positive edge clock transitions
Y Built-in low power RC oscillator (g2% accuracy over
temperature range and g10% supply and g3% over
processing k 10 kHz)
Y Oscillator frequency range DC to 100 kHz
Y Oscillator may be bypassed if external clock is available
(apply external clock to pin 3)
Y Automatic reset initializes all counters when power
turns on
Y External master reset totally independent of automatic
reset operation
Y Operates at 2n frequency divider or single transition
timer
Y Q Q select provides output logic level flexibility
Y Reset (auto or master) disables oscillator during reset-
ting to provide no active power dissipation
Y Clock conditioning circuit permits operation with very
slow clock rise and fall times
Y Wide supply voltage range 3 0V to 15V
Y High noise immunity 0 45 VDD (typ )
Y 5V – 10V – 15V parameter ratings
Y Symmetrical output characteristics
Y Maximum input leakage 1 mA at 15V over full tempera-
ture range
Y High output drive (pin 8) min one TTL load
Logic Diagram
VDD e Pin 14
VSS e Pin 7
Connection Diagram
Dual-In-Line Package
TL F 6001 – 1
Order Number CD4541B
N C Not connected
C1995 National Semiconductor Corporation TL F 6001
Top View
TL F 6001 – 2
RRD-B30M105 Printed in U S A


National Semiconductor Electronic Components Datasheet

CD4541BC Datasheet

Programmable Timer

No Preview Available !

Absolute Maximum Ratings (Notes 1 2)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage (VDD)
Input Voltage (VIN)
Storage Temperature Range (TS)
Power Dissipation (PD)
Dual-In-Line
Small Outline
b0 5V to a18V
b0 5V to VDD a0 5V
b65 C to a150 C
700 mW
500 mW
Lead Temperature (TL) (soldering 10 sec )
260 C
Recommended Operating
Conditions (Note 2)
Supply Voltage (VDD)
3V to 15V
Input Voltage (VIN)
0 to VDD
Operating Temperature Range
CD4541BM
CD4541BC
b55 C to a125 C
b40 C to a85 C
DC Electrical Characteristics (Note 2) CD4541BM
Symbol
Parameter
Conditions
b55 C
a25 C
a125 C
Units
Min Max Min Typ Max Min Max
IDD
VOL
VOH
VIL
VIH
IOL
IOH
IIN
Quiescent Device Current VDD e 5V VIN e VDD or VSS
VDD e 10V VIN e VDD or VSS
VDD e 15V VIN e VDD or VSS
5 0 005 5 150
10 0 010 10 300
20 0 015 20 600
Low Level Output Voltage VDD e 5V
l lVDD e 10V IO k 1 mA
VDD e 15V
0 05
0 05
0 05
0 0 05
0 0 05
0 0 05
0 05
0 05
0 05
High Level Output Voltage VDD e 5V
l lVDD e 10V IO k 1 mA
VDD e 15V
4 95
9 95
14 95
4 95
9 95
14 95
5
10
15
4 95
9 95
14 95
Low Level 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
30
40
2 15
4 30
6 40
15
30
40
High Level Input Voltage
VDD e 5V VO e 0 5V or 4 5V
35
VDD e 10V VO e 1 0V or 9 0V 7 0
VDD e 15V VO e 1 5V or 13 5V 11 0
35 3
70 6
11 0 9
35
70
11 0
Low Level Output Current VDD e 5V VO e 0 4V
(Note 3)
VDD e 10V VO e 0 5V
VDD e 15V VO e 1 5V
2 85
4 96
19 3
2 27 3 6
40 90
15 6 34 0
16
28
10 9
High Level Output Current VDD e 5V VO e 2 5V
(Note 3)
VDD e 10V VO e 9 5V
VDD e 15V VO e 3 5V
7 96
4 19
16 3
6 42 13 0
3 38 8 0
13 2 30 0
4 49
2 37
9 24
Input Current
VDD e 15V VIN e 0V
VDD e 15V VIN e 15V
b0 10
0 10
b10b5 b0 10
10b5 0 10
b1 0
10
mA
mA
mA
V
V
V
V
V
V
V
V
V
V
V
V
mA
mA
mA
mA
mA
mA
mA
mA
DC Electrical Characteristics (Note 2) CD4541BC
Symbol
Parameter
Conditions
b40 C
a25 C
a85 C Units
Min Max Min Typ Max Min Max
IDD
VOL
VOH
VIL
Quiescent Device Current
Low Level Output Voltage
High Level Output Voltage
Low Level Input Voltage
VDD e 5V VIN e VDD or VSS
VDD e 10V VIN e VDD or VSS
VDD e 15V VIN e VDD or VSS
VDD e 5V
l lVDD e 10V IO k 1mA
VDD e 15V
VDD e 5V
l lVDD e 10V IO k 1 mA
VDD e 15V
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
4 95
9 95
14 95
20
40
80
0 05
0 05
0 05
15
30
40
4 95
9 95
14 95
0 005
0 010
0 015
0
0
0
5
10
15
2
4
6
20
40
80
0 05
0 05
0 05
15
30
40
4 95
9 95
14 95
150
300
600
0 05
0 05
0 05
15
30
40
mA
mA
mA
V
V
V
V
V
V
V
V
V
2


Part Number CD4541BC
Description Programmable Timer
Maker National Semiconductor
PDF Download

CD4541BC Datasheet PDF






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