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| UTC TA31002 LINEAR INTEGRATED CIRCUIT TELEPHONE TONE RINGER DESCRIPTION The UTC TA31002 is a bipolar integrated circuit designed for telephone bell replacement. It can also be used as alarms or other alerting devices. FEATURES *Current consumption is small. (at no-load) *Package is compaction. (DIP-8 pin) *Oscillation frequency is variable. *Built-in threshold circuits prevent false triggering due to power noise as well as "chirps" due to rotary dial. *Few external componens. DIP-8 PIN CONFIGURATIONS Vcc 1 2 3 4 8 7 6 5 Output High Freq. Time Constant High Freq. Time Constant GND RSL Low Freq. Time Constant Low Freq. Time Constant ABSOLUTE MAXIMUM RATINGS (Ta=25C ) PARAMETER Power Supply Voltage Power Dissipation Operating Temperature Storage Temperature SYMBOL Vcc Pd Topr Tstg VALUE 30 800 -40 to 85 -55 to 150 UNIT V mW C C UTC UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R108-004,A UTC TA31002 BLOCK DIAGRAM LINEAR INTEGRATED CIRCUIT R1 C2 R2 4 7 6 3 C1 LOW OSC HIGH OSC AMP 8 OUTPUT 1 POWER SUPPLY (WITH HYSTERESIS) 5 2 Note:R1,R2,C1 and C2 are parts externally mounted ELECTRICAL CHARACTERISTICS( Ta=25C ) (All voltage referenced to GND unless otherwise specified) PARAMETER Operating Voltage Initiation Supply Voltage Sustaining Supply Voltage Initiation Current Consumption Sustaining Current Consumption Oscillation Frequency (not3) Output Voltage " H" Level Output Voltage "L" Level SYMBOL Vopr Vsi Vsus Isi Isus fL fH1 fH2 VOH VOL TEST CONDITIONS (note 1) (note 2) No-Load C1=0.47F,R1=165k C2=6800pF,R2=191k Vcc=24V,VOH=-10mA PIN7=GND Vcc=24V,VOL=10mA PIN7=7V MIN 17 10.5 1.4 0.7 9 461 576 20.0 0.7 TYP 19 12 3.3 1.4 10 512 640 21.5 1.0 MAX 29 21 4.2 2.5 11 563 703 22.5 2.0 UNIT V V V mA mA Hz Hz Hz V V *NOTE : 1. Initiation supply voltage (Vsi) is a supply voltage required to start oscillation of the tone ringer. 2. Sustaining supply voltage (Vsus) is a supply voltage required to maintain oscillation of the tone ringer. 3. Oscillation frequency is determined by the following equations 1,2,and 3. (1) fL=1/1.234*R1*C1 (Hz) ; (2)fH1=1/1.515*R2*C2 (Hz); (3)fH2=1.24 fH1(Hz) UTC UNISONIC TECHNOLOGIES CO., LTD. 2 QW-R108-004,A UTC TA31002 APPLICATION NOTE LINEAR INTEGRATED CIRCUIT In the TA31002 the initiation current consumption (Isi) can be changed by using the RSL terminal. The resistor RSL is connected to GND from PIN2 as shown in fig.1. Further, the initation current consumption(Isi) can be changed by changing the value of RSL. Fig.2 show the graph of Vs-Is characteristic at the time when RSL has been changed to three values. The Vs-Is characteristic in TA31002 at the time when RSL=6.8k coincides with that at the time when PIN2 of the TA31001 has been used at an open state. Vs LS 1 2 TA31002 RSL 5 GND FIG.1 CURRENT CONSUMPTION (mA) Is 5 4 RSL=3.3k 3 RSL=6.8k 2 RSL=13k 1 Vsus Vsi 30 Vs SUPPLY VOLTAGE (V) FIG.2 10 20 UTC UNISONIC TECHNOLOGIES CO., LTD. 3 QW-R108-004,A UTC TA31002 APPLICATION CIRCUIT LINEAR INTEGRATED CIRCUIT TIP 2K 1 F/250V 104B42 0.22 F 1 RSL 8 2 RING D5Z27 7 61 R2 3 R1 4 UTC TA31002 6 C2 5 C4 15 F/35V + - SP C1 15k 1300:8 fL=1/1.234R1*C1 fH1=1/1.515R2*C2 fH2=1.24fH1 when: R1=165K R2=191K C1=0.47F/16V C2=0.0068F/16V fL10Hz fH1500Hz fH2630Hz UTC UNISONIC TECHNOLOGIES CO. LTD 4 |
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