MC14541B

Manufacturer Part NumberMC14541B
DescriptionProgrammable Timer
ManufacturerON Semiconductor
MC14541B datasheet
 
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MC14541B
Programmable Timer
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
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
n
stage frequency being f
/2
.
osc
8
10
13
16
Available Outputs 2
, 2
, 2
or 2
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)
External Master Reset Totally Independent of Automatic Reset
Operation
n
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
Clock Conditioning Circuit Permits Operation with Very Slow Clock
Rise and Fall Times
Automatic Reset Initializes All Counters On Power Up
Supply Voltage Range = 3.0 Vdc to 18 Vdc with Auto Reset
Supply Voltage Range =
Disabled (Pin 5 = V
Supply Voltage Range
= 8.5 Vdc to 18 Vdc with Auto Reset
Supply Voltage Range =
Enabled (Pin 5 = V
MAXIMUM RATINGS
(Voltages Referenced to V
Symbol
Parameter
V
DC Supply Voltage Range
DD
V
, V
Input or Output Voltage Range
in
out
(DC or Transient)
I
Input Current (DC or Transient)
in
I
Output Current (DC or Transient)
out
P
Power Dissipation,
D
per Package (Note 3.)
T
Ambient Temperature Range
A
T
Storage Temperature Range
stg
T
Lead Temperature
L
(8–Second Soldering)
2. Maximum Ratings are those values beyond which damage to the device
may occur.
3. Temperature Derating:
Plastic “P and D/DW” Packages: – 7.0 mW/ _ C From 65 _ C To 125 _ C
Semiconductor Components Industries, LLC, 2000
March, 2000 – Rev. 6
DD
th
) with the n
osc
Device
)
DD
MC14541BCP
)
SS
MC14541BD
) (Note 2.)
MC14541BDR2
SS
Value
Unit
MC14541BDT
– 0.5 to +18.0
V
MC14541BDTR2
– 0.5 to V
+ 0.5
V
DD
MC14541BF
10 (per Pin)
mA
MC14541BFEL
45 (per Pin)
mA
1. For ordering information on the EIAJ version of
the SOIC packages, please contact your local
500
mW
ON Semiconductor representative.
This device contains protection circuitry to guard
– 55 to +125
C
against damage due to high static voltages or electric
fields. However, precautions must be taken to avoid ap-
– 65 to +150
C
plications of any voltage higher than maximum rated
260
C
voltages to this high–impedance circuit. For proper
operation, V
range V
SS
Unused inputs must always be tied to an appropriate
logic voltage level (e.g., either V
puts must be left open.
1
http://onsemi.com
MARKING
DIAGRAMS
14
PDIP–14
MC14541BCP
P SUFFIX
AWLYYWW
CASE 646
1
14
SOIC–14
14541B
D SUFFIX
AWLYWW
CASE 751A
1
14
TSSOP–14
14
DT SUFFIX
541B
CASE 948G
ALYW
1
14
SOEIAJ–14
MC14541B
F SUFFIX
AWLYWW
CASE 965
1
A
= Assembly Location
WL or L = Wafer Lot
YY or Y = Year
WW or W = Work Week
ORDERING INFORMATION
Package
Shipping
PDIP–14
2000/Box
SOIC–14
55/Rail
SOIC–14
2500/Tape & Reel
TSSOP–14
96/Rail
TSSOP–14 2500/Tape & Reel
SOEIAJ–14
See Note 1.
SOEIAJ–14
See Note 1.
and V
should be constrained to the
v
v
in
out
(V
or V
)
V
.
in
out
DD
or V
). Unused out-
SS
DD
Publication Order Number:
MC14541B/D

MC14541B Summary of contents

  • Page 1

    ... MC14541B Programmable Timer 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 reset is enabled and initializes the counter, within the specified V range ...

  • Page 2

    ... The formulas given are for the typical characteristics only When using the on chip oscillator the total supply current (in Adc) becomes Volts DC, and f in kHz. (see Fig. 3) Dissipation during power–on with automatic reset enabled is typically MC14541B PIN ASSIGNMENT ...

  • Page 3

    ... PULSE R S GENERATOR AR Q/Q SELECT MODE AND C OUTPUTS ARE LEFT OPEN 90% 50% 10% 50% DUTY CYCLE Figure 1. Power Dissipation Test Circuit and Waveform MC14541B = pF Symbol TLH t 5.0 THL PLH t 5.0 PHL PHL t 5 ...

  • Page 4

    ... Count Counter Stages 65536 3 INTERNAL RESET R S Figure 3. Oscillator Circuit Using RC Configuration MC14541B MUX 8–STAGE COUNTER RESET 10 MODE Pin n 2 Auto Reset, 5 Auto Reset 8192 Operating 1024 Master Reset, 6 ...

  • Page 5

    ... When A is “1” selected for both states of B. However INPUT MC14541B 100 5 FUNCTION 2 1 120 0.5 0 0.1 75 ...

  • Page 6

    ... K D SEATING 14 PL PLANE 0.25 (0.010 MC14541B PACKAGE DIMENSIONS P SUFFIX PLASTIC DIP PACKAGE CASE 646–06 ISSUE M NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI 2. CONTROLLING DIMENSION: INCH. 3. DIMENSION L TO CENTER OF LEADS WHEN B 4. DIMENSION B DOES NOT INCLUDE MOLD FLASH. ...

  • Page 7

    ... L PIN 1 IDENT 0.15 (0.006 –V– C 0.10 (0.004) –T– SEATING G D PLANE MC14541B PACKAGE DIMENSIONS DT SUFFIX PLASTIC TSSOP PACKAGE CASE 948G–01 ISSUE 0.25 (0.010 –U– F DETAIL Ç Ç Ç ...

  • Page 8

    ... A 0.05 0.20 0.002 0.008 1 b 0.35 0.50 0.014 0.020 c 0.18 0.27 0.007 0.011 D 9.90 10.50 0.390 0.413 E 5.10 5.45 0.201 0.215 e 1.27 BSC 0.050 BSC H 7.40 8.20 0.291 0.323 E 0.50 0.50 0.85 0.020 0.033 L 1.10 1.50 0.043 0.059 0.70 0.90 0.028 0.035 1 Z ––– 1.42 ––– 0.056 MC14541B/D ...