The MC14541B programmable timer consists of a 16–stage binary
counter, an integrated oscillator for use with an external capacitor and
two resistors, an automatic power–on reset circuit, and output control
logic.
Timing is initialized by turning on power, whereupon the power–on
http://onsemi.com
MARKING
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
DIAGRAMS
14
oscillate with a frequency determined by the external RC network. The
PDIP–14
P SUFFIX
CASE 646
MC14541BCP
AWLYYWW
th
16–stage counter divides the oscillator frequency (f ) with the n
osc
n
stage frequency being f /2 .
osc
8
1
10 13
16
• Available Outputs 2 , 2 , 2 or 2
14
SOIC–14
D SUFFIX
CASE 751A
14541B
AWLYWW
• Increments on Positive Edge Clock Transitions
• Built–in Low Power RC Oscillator (± 2% accuracy over temperature
range and ± 20% supply and ± 3% over processing at < 10 kHz)
• Oscillator May Be Bypassed if External Clock Is Available (Apply
external clock to Pin 3)
1
14
TSSOP–14
DT SUFFIX
CASE 948G
14
541B
ALYW
• External Master Reset Totally Independent of Automatic Reset
Operation
1
14
1
SOEIAJ–14
F SUFFIX
CASE 965
n
MC14541B
AWLYWW
• Operates as 2 Frequency Divider or Single Transition Timer
• Q/Q Select Provides Output Logic Level Flexibility
• Reset (auto or master) Disables Oscillator During Resetting to
Provide No Active Power Dissipation
A
= Assembly Location
WL or L = Wafer Lot
YY or Y = Year
WW or W = Work Week
• Clock Conditioning Circuit Permits Operation with Very Slow Clock
Rise and Fall Times
• Automatic Reset Initializes All Counters On Power Up
ORDERING INFORMATION
• Supply Voltage Range = 3.0 Vdc to 18 Vdc with Auto Reset
Device
Package
PDIP–14
SOIC–14
Shipping
Supply Voltage Range = Disabled (Pin 5 = V
)
DD
MC14541BCP
MC14541BD
2000/Box
55/Rail
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 ) (Note 2.)
SS
MC14541BDR2
SOIC–14 2500/Tape & Reel
TSSOP–14 96/Rail
Symbol
Parameter
Value
Unit
V
MC14541BDT
V
DD
DC Supply Voltage Range
–0.5 to +18.0
MC14541BDTR2 TSSOP–14 2500/Tape & Reel
V , V
in out
Input or Output Voltage Range
(DC or Transient)
–0.5 to V + 0.5
V
DD
MC14541BF
SOEIAJ–14
SOEIAJ–14
See Note 1.
See Note 1.
I
Input Current (DC or Transient)
Output Current (DC or Transient)
±10 (per Pin)
±45 (per Pin)
500
mA
mA
mW
in
MC14541BFEL
I
out
1. For ordering information on the EIAJ version of
the SOIC packages, please contact your local
ON Semiconductor representative.
P
Power Dissipation,
D
per Package (Note 3.)
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–impedance circuit. For proper
T
Ambient Temperature Range
Storage Temperature Range
–55 to +125
–65 to +150
260
°C
°C
°C
A
T
stg
T
Lead Temperature
(8–Second Soldering)
L
operation, V and V should be constrained to the
in
out
range V
(V or V
)
V
.
SS
in
out
DD
2. Maximum Ratings are those values beyond which damage to the device
may occur.
3. Temperature Derating:
Unused inputs must always be tied to an appropriate
logicvoltagelevel(e.g., eitherV orV ). Unusedout-
puts must be left open.
SS
DD
Plastic “P and D/DW” Packages: – 7.0 mW/ C From 65 C To 125 C
Semiconductor Components Industries, LLC, 2000
1
Publication Order Number:
March, 2000 – Rev. 6
MC14541B/D
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