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IL2533 Datasheet(PDF) 4 Page - Integral Corp. |
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IL2533 Datasheet(HTML) 4 Page - Integral Corp. |
4 / 27 page IL2533 Table 1 continued Pin No Pin letter symbol Function 17 R4 18 R3 19 R2 20 R1 Keyboard line. (see keyboard scheme at figure 3) 21 FCI Frequency comparator input. Schmitt flip-flop input for ring frequency determination 22 LED LED output driver. Output for LED control, blinking in “Program / Mute ”state 23 24 M1 M2 Microphone outputs Differential inputs for microphone (electret type) 25 CS Input of current shunting control. Given N-channel output with open drain controls outer shunting high capacity transistor for modulation of line voltage and for line shorting during period of pulse number dialing 26 VSS Negative supply connection 27 LI Line input. Input is used for power abstraction and (adjusting) of line current 28 RI Receipt input. Input for signal received *Note – LD – pulse number dialing; *MF – frequency number dialing; *DTMF – two-frequency dialing (often case of frequence dialing) Function selection (general table) Function Straight memory (single key) 4 Indirect memory (two key) 10 Redialing yes LNR key yes Insert by LNR pause key yes Pause key PS yes Р/М key or МТ Р/М Tone/Pulse key (Т/Р) yes Temporary MF key " ∗" yes Automatic setup key (А – D) yes Volumes keys (VOL, "-/+") yes Volume reset by off-hook yes Tone ring programming yes Pause duration “flash” R3 600m 4 |
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