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HCF4020
14 STAGE RIPPLE-CARRY BINARY COUNTER/DIVIDERS
1/11March 2004 MEDIUM SPEED OPERATION:
16MHz (Typ.)at VDD= 10V FULLY STATIC OPERATION COMMON RESET BUFFERED INPUTS AND OUTPUTS STANDARDIZED SYMMETRICAL OUTPUT
CHARACTERISTICS QUIESCENT CURRENT SPECIFIED UP TO
20V 5V, 10V AND 15V PARAMETRIC RATINGS INPUT LEAKAGE CURRENT= 100nA (MAX)AT VDD =18VTA= 25°C 100% TESTED FOR QUIESCENT CURRENT
DESCRIPTIONHCF4020B isa monolithic integrated circuit
fabricated in Metal Oxide Semiconductor
technology availablein DIP and SOP packages.
HCF4020Bisa ripple carry binary counter. All
counter stages are master-slave flip-flops. The
stateofa counter advances one count on the
negative transitionof each input pulse;a high level the RESET line resets the countertoits all
zeros stage. Schmitt trigger action on the input
pulse line permits unlimited clock rise and fall
times.
All inputs and outputs are buffered.
HCF4020BRIPPLE-CARRY BINARY COUNTER/DIVIDERS 14 STAGE
PIN CONNECTION
ORDER CODES
HCF4020B2/11
IINPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
FUNCTIONAL DIAGRAM
TRUTH TABLE: Don’t Care
LOGIC DIAGRAM
HCF4020B3/11
ABSOLUTE MAXIMUM RATINGSAbsoluteMaximum Ratingsare those values beyond which damagetothe device mayoccur.Functional operation under these conditionsis
not implied.
All voltage valuesare referredto VSSpin voltage.
RECOMMENDED OPERATING CONDITIONS
HCF4020B4/11
SPECIFICATIONSThe Noise Marginfor both"1"and"0" levelis:1V min. with VDD=5V,2V min. with VDD=10V, 2.5V min. with VDD=15V
HCF4020B5/11
DYNAMIC ELECTRICAL CHARACTERISTICS(T amb= 25°C,CL= 50pF,RL= 200KΩ,tr=tf =20ns)
(*) Typical temperature coefficientforall VDD valueis 0.3%/°C.
HCF4020B6/11
TEST CIRCUIT= 50pFor equivalent (includesjig and probe capacitance) =200KΩ =ZOUTof pulse generator (typically 50Ω)
WAVEFORM1: MINIMUM PULSE WIDTH (RESET) AND REMOVAL TIME (RESET TOΦ) (f=1MHz;
50% duty cycle)
