MC14541B
Programmable Timer
counter, an integrated oscillator for use with an external capacitor and
two resistors, an automatic power−on reset circuit, and output control
logic.
reset is enabled and initializes the counter, within the specified V
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−stage counter divides the oscillator frequency (f
stage frequency being f
Features
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© Semiconductor Components Industries, LLC, 2006
The MC14541B programmable timer consists of a 16−stage binary
Timing is initialized by turning on power, whereupon the power−on
range and ± 20% supply and ± 3% over processing at < 10 kHz)
(Apply external clock to Pin 3)
Operation
Provide No Active Power Dissipation
Rise and Fall Times
Supply Voltage Range =
Supply Voltage Range
Supply Voltage Range =
Available Outputs 2
Increments on Positive Edge Clock Transitions
Built−in Low Power RC Oscillator (± 2% accuracy over temperature
Oscillator May Be Bypassed if External Clock Is Available
External Master Reset Totally Independent of Automatic Reset
Operates as 2
Q/Q Select Provides Output Logic Level Flexibility
Reset (auto or master) Disables Oscillator During Resetting to
Clock Conditioning Circuit Permits Operation with Very Slow Clock
Automatic Reset Initializes All Counters On Power Up
Supply Voltage Range = 3.0 Vdc to 18 Vdc with Auto Reset
Pb−Free Packages are Available
n
Frequency Divider or Single Transition Timer
8
V
MR
osc
NC
, 2
R
C
AR
R
SS
PIN ASSIGNMENT
tc
tc
S
NC = NO CONNECTION
= 8.5 Vdc to 18 Vdc with Auto Reset
/2
10
Disabled (Pin 5 = V
Enabled (Pin 5 = V
n
, 2
1
2
3
4
5
6
7
.
13
or 2
16
14
13
12
11
10
9
8
V
B
A
NC
MODE
Q/Q SEL
Q
DD
SS
DD
)
)
osc
) with the n
1
DD
th
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
(Note: Microdot may be in either location)
ORDERING INFORMATION
A
WL, L
YY, Y
WW, W
G or G
CASE 751A
CASE 948G
SOEIAJ−14
DT SUFFIX
TSSOP−14
CASE 646
CASE 965
D SUFFIX
P SUFFIX
F SUFFIX
SOIC−14
PDIP−14
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
Publication Order Number:
14
1
14
14
1
1
DIAGRAMS
MC14541BCP
MARKING
AWLYYWWG
14
1
MC14541B
MC14541B/D
AWLYWW
ALYWG
14541BG
ALYWG
541B
14
G