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CD22202 Scheda tecnica(PDF) 6 Page - Intersil Corporation |
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CD22202 Scheda tecnica(HTML) 6 Page - Intersil Corporation |
6 / 6 page 4-250 All Intersil semiconductor products are manufactured, assembled and tested under ISO9000 quality systems certification. Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see web site http://www.intersil.com CD22202, CD22203 FIGURE 6. CD22203 DTMF RECEIVER WITH GUARD TIME CIRCUIT TO PROVIDE EXCEPTIONAL TALK-OFF PERFORMANCE D1 EN IN1633 XEN ANALOG IN D2 D4 D8 CLRDV DV ATB XIN XOUT VDD VSS VSS HEX/B28 ED 9 8 7 6 5 4 3 2 1 10 11 12 13 14 15 16 17 18 +5V 10 µF R2 ≈240K (55ms) IN4148 C2 0.15 µF R5 1.8M R6 100K ENABLE INPUT 1/3 CD74HC04 (BUFFERS OPTIONAL) DV OUT R4 33K R3 ≈390K C1 4700pF R1 1M 3.58 MHz AUDIO IN D8 HEX DATA OUT D4 D2 D1 Handling All inputs and outputs of CMOS devices have a network for electrostatic protection during handling. Recommended han- dling practices for CMOS devices are described in ICAN-6525 “Guide to Better Handling and Operation of CMOS Integrated Circuits”. Operating Operating Voltage During operation near the maximum supply voltage limit, care should be taken to avoid or suppress power supply turn-on and turnoff transients, power supply ripple, or ground noise; any of these conditions must not cause VDD - VSS to exceed the absolute maximum rating. Input Signals To prevent damage to the input protection circuit, input sig- nals should never be greater than VDD nor less than VSS. Input currents must not exceed 20mA even when the power supply is off. Unused Inputs A connection must be provided at every input terminal. All unused input terminals must be connected to either VDD or VSS, whichever is appropriate. Output Short Circuits Shorting of outputs to VDD or VSS may damage CMOS devices by exceeding the maximum device dissipation. Operating and Handling Considerations |
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Descrizione simile - CD22202 |
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