HCF4541B
PROGRAMMABLE TIMER
ss
s
s
s
ss
s
s
s
ss
s
16 STAGE BINARY COUNTER
LOW SYMMETR. OUTPUT RESISTANCE, TYPICALLY 100Ω at VDD = 15V
OSCILLATOR FREQUENCY RANGE :DC to 100KHz
AUTO OR MASTER RESET DISABLES
OSCILLATOR DURING RESET TO REDUCE POWER DISSIPATION
OPERATES WITH VERY SLOW CLOCK RISE AND FALL TIMES
BUILT-IN LOW-POWER RC OSCILLATOREXTERNAL CLOCK (applied to pin 3) CAN BE USED INSTEAD OF OSCILLATOR
OPERATES AS 2n FREQUENCY DIVIDER OR AS A SINGLE-TRANSITION TIMERQ/Q SELECT PROVIDES OUTPUT LOGIC LEVEL FLEXIBILITY
CAPABLE OF DRIVING SIX LOW POWER TTL LOADS, THREE LOW POWER
SCHOTTKY LOADS, OR SIX HTL LOADS OVER THE RATED TEMP. RANGE
5V, 10V AND 15V PARAMETRIC RATINGS100% TESTED FOR QUIESCENT CURRENT AT 20V
MEETS ALL REQUIREMENTS OF JEDEC JESD13B \" STANDARD SPECIFICATIONS FOR DESCRIPTION OF B SERIES CMOS DEVICES\"
DIPSOPORDER CODES
PACKAGEDIPSOP
TUBEHCF4541BEYHCF4541BM1
T & RHCF4541M013TR
DESCRIPTION
The HCF4541B is a monolithic integrated circuitfabricated in Metal Oxide Semiconductortechnology available in DIP and SOP packages. This device is composed of a 16-stages binarycounter, an oscillator controlled by 2 externalresistors and a capacitor, an output control logicand an automatic power-on reset circuit. Thecounter varies on positive-edge clock transitionand it can be cleared by the MASTER RESETinput. The output from this timer is the Q or Qoutput from the 8th, 13th, or 16th counter stage.The choice of the stage depends on the time
PIN CONNECTIONSeptember 20021/10
HCF4541B
select inputs A or B (see frequency selectiontable). The output is available in one of the twomodes that can be selected via the MODE inputpin 10 (see truth table). The output turns out as acontinuos square wave, with a frequency equal tothe oscillator frequency divided by 2N when thisMODE input is a logic \"1\". When it is a logic \"0\"and after a MASTER RESET is started, and Qoutput has been selected, the output goes up to ahigh state after 2 N-1 counts. It remains in thatstate till another MASTER RESET pulse is applyor the mode input is a logic \"1\". The process startsby setting the AUTO RESET input (pin 5) to logicINPUT EQUIVALENT CIRCUIT
\"0\" and switching power on. If pin 5 is set to logic\"1\counting cannot start till a positive MASTERRESET pulse is applied, returning to a low level.The AUTO RESET consumes a remarkableamount of power and should not be used if lowpower operation is wanted. The frequency of theoscillator depends on the RC network. It can becalculated using the following formula : f = 1 / 2.3 RTC CTC
where f is between 1KHz and 100KHz and RS >10 KΩ and ≈2 RTC PIN DESCRIPTION
PIN No12, 134, 111, 23561098714
SYMBOLA, BNCRTC, CTC
RSARMRMODEQ/Q SELECT
QVSSVDD
NAME AND FUNCTIONTime Select InputNot Connected
External Resistor, Capaci-tor Connection
External Resistor Con-nection or External Clock Input
Auto Reset InputMaster Reset InputMode Select InputOutput SelectorOutput
Negative Supply VoltagePositive Supply Voltage
RC OSCILLATOR CIRCUIT
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HCF4541B
FUNCTIONAL DIAGRAM
FREQUENCY SELECTION TABLE
ALLHH
BLHLH
N. of Stages N
1310816
Count 2N8192102425665536
TRUTH TABLE
PIN56910
STATE
L
Auto Reset OnMaster Reset OffOutput Initially Low After Reset (Q)Single Transition Mode
H
Auto Reset DisableMaster Reset OnOutput Initially High After Reset (Q)Recycle Mode
LOGIC DIAGRAM
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HCF4541B
ABSOLUTE MAXIMUM RATINGS
SymbolVDDVIIIPDTopTstg
Supply VoltageDC Input VoltageDC Input Current
Power Dissipation per Package
Power Dissipation per Output TransistorOperating TemperatureStorage Temperature
Parameter
Value-0.5 to +22-0.5 to VDD + 0.5
± 10200100-55 to +125-65 to +150
UnitVVmAmWmW°C°C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied.
All voltage values are referred to VSS pin voltage.
RECOMMENDED OPERATING CONDITIONS
SymbolVDDVITop
Supply VoltageInput Voltage
Operating Temperature
Parameter
Value3 to 200 to VDD-55 to 125
UnitVV°C
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HCF4541B
DC SPECIFICATIONS
Test Condition
Symbol
Parameter
VI(V)0/50/100/150/200/50/100/155/010/015/0
0.5/4.51/91.5/13.54.5/0.59/113.5/1.52.54.69.513.50.40.51.5VO(V)
|IO|VDD(µA)(V)
5101520510155101551015510155510155101518
TA = 25°CMin.
Typ.0.040.040.040.08
4.959.9514.95
0.050.050.053.5711
1.534
-1.55-5-4-101.55410
-3.1-10-8-203.1820±10-55
-1.08-3-3.3-8.41.083.38.43.5711
1.534
-1.08-4.1-3.3-8.41.083.38.4
Max.51020100
4.959.9514.95
0.050.050.05
3.5711
1.534
Value-40 to 85°CMin.
Max.1503006003000
4.959.9514.95
0.050.050.05
-55 to 125°CMin.
Max.1503006003000
Unit
IL
Quiescent Current
µA
VOH
High Level Output Voltage
Low Level Output Voltage
High Level Input VoltageLow Level Input VoltageOutput Drive Current
VOL
VIH
VIL
IOH
IOL
Output Sink Current
Input Leakage Current
Input Capacitance
0/50/50/100/150/50/100/150/18
<1<1<1<1<1<1<1<1<1<1<1<1<1<1<1<1<1<1<1
V
V
V
V
mA
mA
II
Any InputAny Input
±0.17.5
±1±1µApF
CI
The Noise Margin for both \"1\" and \"0\" level is: 1V min. with VDD=5V, 2V min. with VDD=10V, 2.5V min. with VDD=15V
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HCF4541B
DYNAMIC ELECTRICAL CHARACTERISTICS (Tamb = 25°C, CL = 50pF, RL = 200KΩ, tr = tf = 20 ns)
Test Condition
Symbol
Parameter
VDD (V)51015510155101551015510155101551015
Min.
Value (*)Typ.3.51.250.963.52.510050401809065300100851.546Unlimited
Max.10.53.82.918107.520010080360180130
µsUnit
Propagation Delay Time (28)
tPHL tPLH(CLOCK to Q)
Propagation Delay Time (216)
tPHL tPLH(CLOCK to Q)tTHL
Transition Time
µs
ns
tTLH
Transition Time
ns
Master Reset, Clock Pulse Width
fCL
Maximum Clock Pulse Input FrequencyMaximum Clock Pulse Input Rise or Fall Time
900300225
ns
MHz
tr, tf
µs
(*) Typical temperature coefficient for all VDD value is 0.3 %/°C.
DIGITAL TIMER APPLICATION
A positive MASTER RESET pulse clears thecounter and latch. The Output goes high andkeeps up till the number of pulses, selected by Aand B , are counted. This circuit is retriggerableand is as accurate as the input frequency. If amore accurate circuit is desired, an external clockcan be used on pin 3. A set-up time equal to thewidth of the one shot output is requiredimmediately following initial power up, duringwhich time the output will be high
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HCF4541B
TEST CIRCUIT
CL = 50pF or equivalent (includes jig and probe capacitance)RL = 200KΩ
RT = ZOUT of pulse generator (typically 50Ω)
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HCF4541BPlastic DIP-14 MECHANICAL DATAmm.DIM.MIN.a1Bbb1DEee3FILZ1.273.38.52.5415.247.15.10.1300.511.390.50.25200.3350.1000.6000.2800.2011.65TYPMAX.MIN.0.0200.0550.0200.0100.7870.065TYP.MAX.inch 2.540.0500.100P001A8/10HCF4541BSO-14 MECHANICAL DATADIM.Aa1a2bb1Cc1DEee3FGLMS3.84.60.58.555.81.277.624.05.31.270.688˚ (max.)0.1490.1810.0198.756.20.350.190.545˚ (typ.)0.3360.2280.0500.3000.1570.2080.0500.0260.3440.2440.1mm.MIN.TYPMAX.1.750.21.650.460.250.0130.0070.0190.003MIN.inchTYP.MAX.0.0680.0070.00.0180.010PO13G9/10HCF4541B
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