HCF4020B is a monolithic integrated circuit
fabricatedinMetalOxideSemiconductor
technology available in DIP and SOP packages.
HCF4020B is a ripple carry binary counter. All
counter stages are master-slav e flip-flops. T he
state of a c ount er advances one count on the
DD
= 10V
DIPSOP
ORDER CODES
PACKAGETUBET & R
DIPHCF4020BEY
SOPHCF4020BM1HCF4020M013TR
negative trans ition of each input pulse; ahigh level
on the RESET line resets the counter to its all
zeros stage. Schmitt trigger action on the input
pulse line permits unlimited clock r ise and fall
times.
All inputs and outputs are buffered.
PIN CONNECTION
1/11March 2004
Page 2
HCF4020B
IINPUT EQ UIVALENT CIRCUITPIN DESCRIPTION
PIN N°SYMBOLNAME AND FUNCTION
9, 7, 5, 4, 6,
13, 12, 14,
15, 1, 2, 3
11RESETReset Input
10ΦInput Pulses
8
16
FUNCTIONAL DIAGRAM
Q1, Q4 to
Q14
V
V
SS
DD
14 BufferedOutputs
Negative Supply Voltage
Positive Supply Voltage
TRUTH TABLE
ΦRESETOUTPUT STATE
XHALLOUTPUTS="L"
X : Don’tCare
LOGIC DIAGRAM
2/11
LNOCHANGE
LADVANCE TO NEXT STATE
Page 3
HCF4020B
ABSOLUTE MAXIMUM RATINGS
SymbolParameterValueUnit
V
V
P
T
T
stg
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied.
All voltage valuesarereferredto V
RECOMMENDED OPERATING CONDITIONS
SymbolParameterValueUnit
V
V
T
Supply Voltage
DD
DC Input Voltage-0.5 to VDD+0.5
I
DC Input Current
I
I
Power Dissipation per Package200mW
D
-0.5 to +22V
± 10mA
Power Dissipation per Output Transistor100mW
Operating Temperature
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