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MC145442DW Fiches technique(PDF) 2 Page - Motorola, Inc |
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MC145442DW Fiches technique(HTML) 2 Page - Motorola, Inc |
2 / 12 page MC145442 •MC145443 MOTOROLA 2 BLOCK DIAGRAM * Refer to the FB pin description. 15 16 RxA2 RxA1 LB MODE SQT TxD TLA Xout Xin 9 8 20 11 14 13 2 MODE CONTROL MODULATOR OSCILLATOR CLOCK DIVIDER SAMPLING CLOCK: 77.82 kHz SAMPLING CLOCK: 19.46 kHz INTERNAL VAG ANALOG GROUND GENERATOR 12 6 19 VAG AAF S/H LOW–BAND BPF HIGH–BAND BPF AC AMP * SMOOTHING FILTER 18 17 ExI TxA 1 10 DSI FB DEMOD 5 RxD 3 CARRIER DETECT CD CDA CDT 7 4 VDD VSS + – + – ABSOLUTE MAXIMUM RATINGS (Voltages Referenced to VSS) Rating Symbol Value Unit Supply Voltage VDD – 0.5 to + 7.0 V DC Input Voltage Vin – 0.5 to VDD + 0.5 V DC Output Voltage Vout – 0.5 to VDD + 0.5 V Clamp Diode Current, per Pin IIK, IOK ± 20 mA DC Output Current, per Pin Iout ± 28 mA Power Dissipation PD 500 mW Operating Temperature Range TA – 40 to + 85 °C Storage Temperature Range Tstg – 65 to + 150 °C RECOMMENDED OPERATING CONDITIONS Parameter Symbol Min Max Unit Supply Voltage VDD 4.5 5.5 V DC Input or Output Voltage Vin, Vout 0 VDD V Input Rise or Fall Time tr, tf — 500 ns Crystal Frequency* fcrystal 3.2 5.0 MHz * Changing the crystal frequency from 3.579 MHz will change the output frequencies. The change in output frequency will be proportional to the change in crystal frequency. This device contains circuitry to protect the inputs against damage due to high static volt- ages or electric fields; however, it is advised that normal precautions be taken to avoid application of any voltage higher than maximum rated voltages to this high impedance circuit. For proper operation it is recommended that Vin and Vout be constrained to the range VSS ≤ (Vin or Vout) ≤ VDD). Unused inputs must always be tied to an appropriate logic voltage level (e.g., either VSS or VDD). |
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Description similaire - MC145442DW |
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