CD4053 is a three two channel digital control analog switch with three independent digital control inputs a, B, C and inh. It has low on impedance and low cut-off leakage current. The digital signal with amplitude of 4.5 ~ 20V can control the digital signal from peak to peak to 20V. There are three groups of SPDT switches in CD4053. Which channel the three groups of switches connect to depends on the input address code ABC.



CD4053 pin diagram and pin function description

Typical application circuit diagram of CD4053

(1) 16 pin: symbol VDD, pin function is power supply+

(2) 8 pin: symbol VSS, pin function is digital signal ground terminal

(3) 7 pin: symbol Vee, pin function is analog signal ground terminal

(4) 6 pin: symbol INH, the pin function is that when the forbidden end is zero, the CMOS three groups of two-way analog switch cd4053be works, otherwise the CMOS three groups of two-way analog switch cd4053be is forbidden.

(5) 4 pin: symbol out / in CX or cy, pin function is common output / input CX or cy

(6) 15 pin: symbol out / in BX or by, pin function is common output / input BX or by

(7) 14 pin: symbol out / in ax or ay, pin function is common output / input ax or ay

(8) 9, 10, 11 pins: symbols C, B, a, the function of the pin is to control the end. When C, B, a are respectively 0 00, the “open” channels CX, BX, ax work. When CBA is 0.01, open channel CX, BX, ay when CBA is 0.10, open channel CX, by, ax when CBA is 0.11, open channel CX, by, ay when CBA is 1.00, open channel cy, BX, ax when CBA is 1.01, open channel cy, BX, ay when CBA is 1.01 When a is 1, 10 respectively, “open” channel cy, by, ax when C B A is 1, 11 respectively, “open” channel cy, by, ay (9) 1, 2, 3, 5, 12, 13 pins: symbol by, BX, CX, cy, ay, ax, pin function is by, BX, CX, cy, ay, ax input / output.

Typical application circuit diagram of CD4053

  1.Single chip microcomputer serial port multiplex circuit composed of CD4053It can only be used when two serial signals are not synchronized.

Typical application circuit diagram of CD4053
2. Design automatic conversion circuit with CD4053
Typical application circuit diagram of CD4053
3. CD4053 anti jitter circuit>>>>>>Analysis of anti jitter circuit based on analog switch CD4053
Typical application circuit diagram of CD4053

At the moment of power on, the input signal VI = 0, because the voltage on capacitor C can not change suddenly, so the voltage Va of analog switch G1 control terminal a = 0, therefore, the 0 output terminal s of analog switch G1 is on the input terminal VI = 0 potential, and the 1 output terminal R is connected to the voltage VDD through resistor R3. At this time, Sr = 01, QQ = QQ, that is, s — r bistable trigger is in the random state of QQ = 01 or QQ = 10. If the S-R bistable trigger is in the initial state of QQ = 01, the state of analog switch G1 and analog switch G2 will not change, and the S-R bistable trigger will stay in the initial state of QQ = 01. If the s — r bistable flip-flop is in the initial state of QQ = 10, the output voltage VQ = VDD of G2 switch will start to charge the capacitor C through resistor R1, and the analog switch type anti jitter circuit of G1 switch.

       4. The connection circuit between CD4053 and MCU>>>>>>>>Application of analog switch CD4053 in MCU

Typical application circuit diagram of CD4053

Input analog quantity A1 and input analog quantity A2 are input to ax and ay of CD4053 respectively, and output a of CD4053 is connected to a / D converter. At the same time, a of CD4053 is controlled by P1.1 control pin of MCU. According to the truth table of input and output status of CD4053, when P1.1 = a = 0, a = ax; when P1.1 = a = 1, a = ay. That is, when P1.1 = 0, the MCU gets the conversion data of input analog quantity A1; when P1.1 = 1, the MCU gets the conversion data of input analog quantity A2.

     

                 Application of analog switch CD4053 in DX transmitter

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