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EM91210 Datasheet(PDF) 9 Page - ELAN Microelectronics Corp |
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EM91210 Datasheet(HTML) 9 Page - ELAN Microelectronics Corp |
9 / 19 page EM91210 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE 9 * This specification are subject to be changed without notice. 10.1.1997 Keyboard debounce time Tdb - 20 - ms Key tone signal: frequency Fkt - 600 - Hz present duration Tkt - 30 - ms Pause time and pulse to tone Tp - 3.6 - sec. COL2=NR Tpt - 2 - sec. COL2=R-Vss Flash time Tf - 600 - Row3, Row4=NR, NR - 100 - ms Row3, Row4=NR, R-Vss - 80 - Row3, Row4=R-Vss, NR - 300 - Row3, Row4=R-Vss,R-Vss Flash pause time Tfp - 300 - ms Pulse rate PSR - 20 - pps Row1 = R-Vdd - 10 - Row1 = R-Vss Make/Break ratio MBR - 40:60 - % Row2 = NR - 33:66 - Row2 = R-Vss Inter-digit pause time Tidp - 800 - ms PSR = 10 pps - 500 - PSR = 20 pps DTMF pin: sink current IoL -0.2 - - mA Vdtmf = 0.5 V DTMF signal DC level Vdc 0.5 - 0.75 Vdd Vdd = 2.0V ~ 5.5V DTMF signal: ac level Vdtmf 142 160 180 mVrms Row group pre-emphase Twist 1 2 3 dB Column - Row distortion THD - -30 -23 dB RL = 5 K Ω load resistance ZL 5 - - K Ω THD <−23dB 96 98 100 Minimum tone duration T D 88 90 92 ms Memory dialing 81 83 85 96 98 100 Minimum inter-tone pause Titp 88 90 92 ms Memory dialing 81 83 85 SDO every bit time Tbit 3.8 3.9 4.1 ms Parameter Sym. Min. Typ. Max. Unit Condition ELECTRICAL CHARACTERISTIC (Ambient temperature is 25 °C, V DD=2.5V unless otherwise noted, all voltages referenced to Vss,Fosc=3.579545 MHz) DTMF output frequency (fosc = 3.579545 MHz) Keyboard scan pin CCITT standard (Hz) Actual output (Hz) Deviation (%) ROW1 (f1) 697 699.1 0.30 ROW2 (f2) 770 766.2 0.49 ROW3 (f3) 852 847.4 -0.53 ROW4 (f4) 941 947.9 0.73 COL1 (f5) 1209 1215.8 0.56 COL2 (f6) 1336 1331.6 -0.32 COL3 (f7) 1477 1471.8 -0.35 |
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