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| Communication ICs Tone ringer IC for telephone set BA8206 / BA8206F The BA8206 and BA8206F are tone ringer ICs which produce a bell sound from a ringing signal. The frequency of the bell sound can be varied by changing the constants of the external resistance and capacitors. The operation initiation current dissipation can be changed at the RSL pin. Also, the output load can be selected, as a piezoelectric buzzer, a transformer coupled speaker, or other similar devices. FApplications Telephones, multi-function telephones, telephone answering machines, facsimiles, equipment involving telephones FFeatures 1) Low current dissipation. 2) Withstands up to 40V. 3) Operation initiation current dissipation can be changed using RSL pin. FBlock diagram 4) Pin layout is compatible with the BA8205, BA6565A, and ML8205. 252 Communication ICs FAbsolute maximum ratings (Ta = 25_C) BA8206 / BA8206F FRecommended operating conditions (Ta = 25_C) FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 24V) 253 Communication ICs FPin descriptions BA8206 / BA8206F FMeasurement circuit 254 Communication ICs BA8206 / BA8206F FCircuit operation Using the RSL pin With the BA8206 and BA8206F, the RSL pin can be used to change the initial supply current (Isi). As shown in Figure 4, resistor RSL is connected from the RSL pin (Pin 2) to the GND. The operation initiation current consumption can be changed by changing the value of the resistor RSL. Figure 5 shows the supply voltage (VCC) - supply current (ICC) characteristics when the value of the resistor RSL is changed. 255 Communication ICs BA8206 / BA8206F FApplication example FElectrical characteristic curves 256 Communication ICs FExternal dimensions (Units: mm) BA8206 / BA8206F 257 |
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