ta31002a Unisonic Technologies, ta31002a Datasheet

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... UTC TA31002A LINEAR INTEGRATED CIRCUIT TELEPHONE TONE RINGER DESCRIPTION The UTC TA31002A is a bipolar integrated circuit designed for telephone bell replacement. It can also be used as alarms or other alerting devices. FEATURES *Designed for telephone bell replacement. *Low current drain for multiple extension of lines. ...

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... UTC TA31002A LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM R2 LOW 3 OSC C2 1 Note:R2,R3,C2 and C3 are parts externally mounted ELECTRICAL CHARACTERISTICS PARAMETER SYMBOL Operating Supply Voltage Vcc Initiation Supply Voltage (note 1) Vsi Initiation Supply Current (note 1) Isi Sustaining Voltage (note 2) Vsus Sustaining Current (note 2) ...

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... F =1/1.504 R3*C3 and F H1 1/1.203 R3*C3. Pin 2 of the UTC TA31002A allows connection of external resistor RSL, which is used to program the slope of the supply current vs. supply voltage characteristics (see Fig.3), and hence the supply current up to the initiation voltage (Vsi). This initiation voltage remains constant independent of RSL ...

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... UTC TA31002A LINEAR INTEGRATED CIRCUIT Circuit Current-Supply Voltage (No Load) 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0 Vcc(V),Supply voltage Fig.2 APPLICATION CIRCUIT TIP C1 R1 0.9 F 560 RING C4 22 F/35V D1 29V UTC UNISONIC TECHNOLOGIES CO., LTD. Supply Current Vs. Supply Voltage (No Load) 8.5 7.5 6.5 5.5 A:R =5K 4.5 SL B:R =6.8K 3.5 SL C:R =13K SL 2.5 1.5 0.5 30 ...