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MC14541 Datasheet

  • MC14541

  • ON Semiconductor [Programmable Timer]

  • ONSEMI

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MC14541B
Programmable Timer
The MC14541B programmable timer consists of a 16鈥搒tage binary
counter, an integrated oscillator for use with an external capacitor and
two resistors, an automatic power鈥搊n reset circuit, and output control
logic.
Timing is initialized by turning on power, whereupon the power鈥搊n
reset is enabled and initializes the counter, within the specified V
DD
range. With the power already on, an external reset pulse can be
applied. Upon release of the initial reset command, the oscillator will
oscillate with a frequency determined by the external RC network. The
16鈥搒tage counter divides the oscillator frequency (f
osc
) with the n
th
stage frequency being f
osc
/2
n
.
鈥?/div>
Available Outputs 2
8
, 2
10
, 2
13
or 2
16
鈥?/div>
Increments on Positive Edge Clock Transitions
鈥?/div>
Built鈥搃n Low Power RC Oscillator (鹵 2% accuracy over temperature
range and
鹵
20% supply and
鹵
3% over processing at < 10 kHz)
鈥?/div>
Oscillator May Be Bypassed if External Clock Is Available (Apply
external clock to Pin 3)
鈥?/div>
External Master Reset Totally Independent of Automatic Reset
Operation
鈥?/div>
Operates as 2
n
Frequency Divider or Single Transition Timer
鈥?/div>
Q/Q Select Provides Output Logic Level Flexibility
鈥?/div>
Reset (auto or master) Disables Oscillator During Resetting to
Provide No Active Power Dissipation
鈥?/div>
Clock Conditioning Circuit Permits Operation with Very Slow Clock
Rise and Fall Times
鈥?/div>
Automatic Reset Initializes All Counters On Power Up
鈥?/div>
Supply Voltage Range = 3.0 Vdc to 18 Vdc with Auto Reset
Supply Voltage Range =
Disabled (Pin 5 = V
DD
)
Supply Voltage Range
= 8.5 Vdc to 18 Vdc with Auto Reset
Supply Voltage Range =
Enabled (Pin 5 = V
SS
)
MAXIMUM RATINGS
(Voltages Referenced to V
SS
) (Note 2.)
Symbol
V
DD
V
in
, V
out
I
in
I
out
P
D
T
A
T
stg
T
L
Parameter
DC Supply Voltage Range
Input or Output Voltage Range
(DC or Transient)
Input Current (DC or Transient)
Output Current (DC or Transient)
Power Dissipation,
per Package (Note 3.)
Ambient Temperature Range
Storage Temperature Range
Lead Temperature
(8鈥揝econd Soldering)
Value
鈥?0.5 to +18.0
鈥?0.5 to V
DD
+ 0.5
鹵
10 (per Pin)
鹵
45 (per Pin)
500
鈥?55 to +125
鈥?65 to +150
260
Unit
V
MC14541BDTR2
V
MC14541BF
mA
mA
mW
擄C
擄C
擄C
MC14541BFEL
SOEIAJ鈥?4
SOEIAJ鈥?4
See Note 1.
See Note 1.
TSSOP鈥?4 2500/Tape & Reel
http://onsemi.com
MARKING
DIAGRAMS
MC14541BCP
AWLYYWW
1
14
14541B
AWLYWW
1
14
TSSOP鈥?4
DT SUFFIX
CASE 948G
14
SOEIAJ鈥?4
F SUFFIX
CASE 965
1
MC14541B
AWLYWW
14
541B
ALYW
PDIP鈥?4
P SUFFIX
CASE 646
SOIC鈥?4
D SUFFIX
CASE 751A
14
1
A
= Assembly Location
WL or L = Wafer Lot
YY or Y = Year
WW or W = Work Week
ORDERING INFORMATION
Device
MC14541BCP
MC14541BD
MC14541BDR2
MC14541BDT
Package
PDIP鈥?4
SOIC鈥?4
SOIC鈥?4
TSSOP鈥?4
Shipping
2000/Box
55/Rail
2500/Tape & Reel
96/Rail
1. For ordering information on the EIAJ version of
the SOIC packages, please contact your local
ON Semiconductor representative.
This device contains protection circuitry to guard
against damage due to high static voltages or electric
fields. However, precautions must be taken to avoid ap-
plications of any voltage higher than maximum rated
voltages to this high鈥搃mpedance circuit. For proper
operation, V
in
and V
out
should be constrained to the
range V
SS
(V
in
or V
out
)
V
DD
.
Unused inputs must always be tied to an appropriate
logic voltage level (e.g., either V
SS
or V
DD
). Unused out-
puts must be left open.
2. Maximum Ratings are those values beyond which damage to the device
may occur.
3. Temperature Derating:
Plastic 鈥淧 and D/DW鈥?Packages: 鈥?7.0 mW/
_
C From 65
_
C To 125
_
C
漏
Semiconductor Components Industries, LLC, 2000
v
v
1
March, 2000 鈥?Rev. 6
Publication Order Number:
MC14541B/D

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