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 8 RSL 2 7 High Freq. Time Constant 3 6 High Freq. Time Constant 4 5 Low Freq. Time Constant Low Freq. Time Constant Output GND ABSOLUTE MAXIMUM RATINGS (Ta=25°C ) PARAMETER Power Supply Voltage Power Dissipation Operating Temperature Storage Temperature UTC SYMBOL VALUE UNIT Vcc Pd Topr Tstg 30 800 -40 to 85 -55 to 150 V mW °C °C UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R108-004,A UTC TA31002 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM R1 4 3 C1 R2 C2 7 HIGH OSC LOW OSC 1 6 8 AMP OUTPUT POWER SUPPLY (WITH HYSTERESIS) 5 2 Note:R1,R2,C1 and C2 are partsexternally mounted ELECTRICAL CHARACTERISTICS( Ta=25°C ) (All voltage referenced to GND unless otherwise specified) PARAMETER Operating Voltage Initiation Supply Voltage Sustaining Supply Voltage Initiation Current Consumption Sustaining Current Consumption SYMBOL Output Voltage “ H” Level Vopr Vsi Vsus Isi Isus fL fH1 fH2 VOH Output Voltage “L” Level VOL Oscillation Frequency (not3) TEST CONDITIONS (note 1) (note 2) No-Load C1=0.47µF,R1=165kΩ C2=6800pF,R2=191kΩ Vcc=24V,VOH=-10mA PIN7=GND Vcc=24V,VOL=10mA PIN7=7V MIN TYP MAX UNIT 17 10.5 1.4 0.7 9 461 576 20.0 19 12 3.3 1.4 10 512 640 21.5 29 21 4.2 2.5 11 563 703 22.5 V V V mA mA Hz Hz Hz V 0.7 1.0 2.0 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 LINEAR INTEGRATED CIRCUIT APPLICATION NOTE 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=6.8kΩ 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=3.3kΩ 3 RSL=6.8kΩ 2 RSL=13kΩ 1 Vsus Vsi 10 20 30 Vs SUPPLY VOLTAGE (V) FIG.2 UTC UNISONIC TECHNOLOGIES CO., LTD. 3 QW-R108-004,A UTC TA31002 LINEAR INTEGRATED CIRCUIT APPLICATION CIRCUIT TIP 2KΩ 1 µF/250V 104B42 0.22 µF 1 8 2 7 D5Z27 RSL RING C4 15 µF/35V + 3 UTC TA31002 61Ω R2 6 C2 SP R1 - 4 C1 5 15kΩ 1300:8Ω fL=1/1.234R1*C1 fH1=1/1.515R2*C2 fH2=1.24fH1 when: R1=165KΩ R2=191KΩ C1=0.47µF/16V C2=0.0068µF/16V fL≅10Hz fH1≅500Hz fH2≅630Hz UTC UNISONIC TECHNOLOGIES CO. LTD 4