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CF8223A Datasheet(PDF) 3 Page - Nippon Precision Circuits Inc |
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CF8223A Datasheet(HTML) 3 Page - Nippon Precision Circuits Inc |
3 / 15 page SM8223A NIPPON PRECISION CIRCUITS—3 PIN DESCRIPTION Number Name I/O Function P ad dimensions ( µm) XY 1 TIP I Tip input. Connected to the telephone line through a protection circuit 1046 2934 2 RING I Ring input. Connected to the telephone line through a protection circuit 6 3 8 2934 3G S O Input-stage amplifier gain-select output. Used to adjust the gain of the input- stage amplifier. 176 2665 4 A G N D O Analog ground output. Internal reference voltage (VDD /2) output level 1 7 6 1954 5 RDIN I Ring detector input. Used for line reversal and ring signal detection. Connected for ring detection of attenuated ring signals. 176 1534 6 RDRC I/O Ring detector RC terminal. Connected to an RC network which sets the ring detector delay time. 176 492 7 RDET O Ring detector output. RDRC -input Schmitt-trigger buffer output. L OW -level output when ring signal is detected. 596 226 8P D W N I P ow er-down control input. L OW -level for normal operation. HIGH-level for p ow er-down state. In the pow er-down state, pins AG N D , OSCOUT, DOUT, and D V are HIGH. 1063 226 9 G N D – Ground. Connected to the system ground potential. 1634 226 1 0 OSCOUT O Cr ystal oscillator output. The cr ystal oscillator element is connected between this pin and OSCIN. 2053 226 1 1 OSCIN I Cr ystal oscillator input. The cr ystal oscillator element is connected between this pin and OSCOUT. 2634 506 1 2 IC I Test input. Tied LOW for normal operation. 2634 1550 13 FSK/ DTMF O FSK/DTMF discr iminator output. HIGH-level output when receiving FSK signal, and LOW -level output when receiving DTMF signal. 2634 1942 1 4 DOUT O Demodulator output. Demodulated FSK or DTMF signal output. HIGH-level output in pow er-down state. 2634 2623 15 D V O Data trigger output. Data is output on DOUT when this pin goes LOW . 2211 2934 1 6 V D D – Supply 1612 2934 |
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Similar Description - CF8223A |
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