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EM91440CK Datasheet(PDF) 13 Page - ELAN Microelectronics Corp |
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EM91440CK Datasheet(HTML) 13 Page - ELAN Microelectronics Corp |
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13 / 24 page  EM91440 SERIES TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE AND DUAL-TONE MELODY GENERATOR 13 * This specification are subject to be changed without notice. 10.1.1997 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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