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AS2533RF Datasheet(PDF) 3 Page - ams AG |
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AS2533RF Datasheet(HTML) 3 Page - ams AG |
3 / 25 page Data Sheet AS2533-36 austriamicrosystems Pin # Symbol Function 17 18 19 20 R4 R3 R2 R1 Keyboard Rows (see key arrangements in Figure 2, Figure 3 and Figure 4) 21 FCI Frequency Comparator Input This is a Schmitt trigger input for ring frequency discrimination. Disabled during off-hook. 22 LED LED Output Driver Output for driving an LED that will be flashing when in Program/Mute state. 23 24 M1 M2 Microphone Inputs Differential inputs for the microphone (electret). 25 CS Current Shunt Control Output This N-channel open drain output controls the external high power shunt transistor for the modulation of the line voltage and for shorting the line during make period of pulse dialing. 26 VSS Negative Power Supply 27 LI Line Input This input is used for power extraction and line current sensing. 28 RI Receive Input This is the input for the receive signal. 1 LS Line Current Sense Input This is the input for sensing the line current. 2 MFL MF Level Setting A voltage divider connected from this pin to AGND and VSS can be used to set the DTMF level. 3 RO Receive Output This is the output for driving a dynamic earpiece with an impedance of 150 to 300 Ω. Selection Overview Function AS2533 AS2534/34R AS2535 AS2536 Direct memories (one-key) 4 0 12 4 Indirect memories (two-key) 10 0 0 10 Repeat dialing yes yes no yes LNR key yes yes yes yes Pause insertion by LNR key yes yes yes yes Pause (PS) key yes yes no yes P/M or MT key P/M P/M P/M P/M Tone/Pulse (T/P) key yes yes no yes Temporary MF by * key yes yes yes yes Centrex (A - D) keys yes yes no yes Volume (VOL, –/+) keys yes yes yes yes Volume reset by off-hook yes no yes no Programming of tone ringer yes AS2534:yes AS2534R: no yes yes R3 Flash duration 600 ms 600 ms 600 ms 600 ms The corresponding product (AS2533-36) can be selected via bond-options (see chapter “Bond options” for details). Revision 8.8 Page 3 of 25 |
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