unisonic technologies co., ltd ta31002 linear integrated circuit www.unisonic.com.tw 1 of 4 copyright ? 2005 unisonic technologies co., ltd qw-r108-004.b 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 components. dip-8 *pb-free plating product number: ta31002l ordering information ordering number normal lead free plating package packing ta31002-d08-t TA31002L-D08-T dip-8 tube TA31002L-D08-T (1)packing type (3)lead plating (2)package type (1) t: tube (2) d08: dip-8 (3) lead free plating, blank: pb/sn
ta31002 linear integrated circuit unisonic technologies co., ltd 2 of 6 www.unisonic.com.tw qw-r108-004.b pin configurations 1 2 3 4 8 7 6 5 vcc rsl low freq. time constant low freq. time costant output high freq. time constant high freq. time constant gnd
ta31002 linear integrated circuit unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw qw-r108-004.b block diagram low osc high osc amp power supply (with hysteresis) 8 6 7 4 1 5 2 output r2 r1 c2 c1 note:r1,r2,c1 and c2 are parts externally mounted 3
ta31002 linear integrated circuit unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw qw-r108-004.b absolute maximum ratings (ta=25 c) parameter symbol ratings unit power supply voltage v cc 30 v power dissipation p d 800 mw operating temperature t opr -40 ~ +85 c storage temperature t stg -55 ~ +150 c note: absolute maximum ratings are those values beyond which the device c ould be permanently damaged. absolute maximum ratings are stress ratings onl y and functional device oper ation is not implied. electrical characteristics (ta=25 c) (all voltage referenced to gnd unless otherwise specified) parameter symbol test conditions min typ max unit operating voltage v opr 29 v initiation supply voltage vsi (note 1) 17 19 21 v sustaining supply voltage vs us (note 2) 10.5 12 - v initiation current consumpt ion isi 1.4 3.3 4.2 ma sustaining current consumption isus no-load 0.7 1.4 2.5 ma fl c1=0.47 f, r1=165k ? 9 10 11 hz fh1 461 512 563 hz oscillation frequency (not3) fh2 c2=6800pf, r2=191k ? 576 640 703 hz output voltage ?h? level v oh vcc=24v, v oh =-10ma pin7=gnd 20.0 21.5 22.5 v output voltage ?l? level v ol vcc=24v, v ol =10ma pin7=7v 0.7 1.0 2.0 v *note : 1. initiation supply voltage (vsi) is a supply voltage required to start o scillation of the tone ringer. 2. sustaining supply voltage (vsus) is a suppl y voltage required to maintain oscillation of the tone ringer. 3. oscillation frequency is deter mined 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)
ta31002 linear integrated circuit unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw qw-r108-004.b application note in the utc 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 fi g.1. further, the initation current consumption (isi) can be changed by changing the value of rsl. fig.2 show the graph of vs-is char acteristic at the time when rsl has b een changed to three values. the vs-is characteristic in utc 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. utc ta31002 1 5 2 gnd vs ls rsl fig.1 10 20 30 1 2 3 4 5 vsus vsi supply voltage (v) r sl =3.3k ? r sl =6.8k ? r sl =13k ? current consumption (ma) is vs fig.2
ta31002 linear integrated circuit unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw qw-r108-004.b application circuit tip ring 1 f/250v sp 2 1 3 4 8 7 6 5 2k $ c4 15 0 f/35v r1 c1 r sl r2 c2 1300:8 $ 0.22 0 f utc ta31002 104b42 + - + d5z27 61 $ 15k $ fl=1/1.234r1*c1 fh1=1/1.515r2*c2 fh2=1.24fh1 when: r1=165k ? r2=191k ? c1=0.47 f/16v c2=0.0068 f/16v fl ? 10hz fh1 ? 500hz fh2 ? 630hz utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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