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| SC91415CK |
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6 page 
Silan Semiconductors SC91415 SERIES HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD Rev: 2.0 2001-11-13 6 (continued) Parameter Symbol Test Conditions Min Typ Max Unit Row1=R-VDD -- 20 -- Pulse Rate PSR Row1=R-VSS -- 10 -- pps Row2=NR -- 40:60 -- Make/Break Ratio MBR Row2=R-VSS -- 33:66 -- % PSR=10pps -- 800 -- Inter-digit Pause Time Tidp PSR=20pps -- 500 -- ms DTMF pin: Sink Current IoL Vdtmf=0.5V -0.2 -- -- mA DTMF signal DC level Vdc VDD=2.0V~5.5V 0.5 -- 0.75 V AC Level Vdtmf Row group 142 160 180 mV Pre-emphase Twist Column – Row 1 2 3 dB Distortion THD RL=5k Ω -- -30 -23 dB DTMF signal Load Resistance ZL THD<-23db 5 -- -- k Ω Minimum tone duration Time Tp -- 96 98 100 ms Minimum Intertone Pause Time tITP Memory dialing 96 98 100 ms -- -23.3 -- Main Tone AC Level Vmtac VDD=2.0V~5.5V 48 53 58 (dBm) mV -- -25.3 -- Melody Output Signal Sub-tone Vstac VDD=2.0V~5.5V 37 42 47 (dBm) mV HD key release hold function debounce time Thdrdb -- -- 280 -- ms SDO every bit time Tbit -- 3.8 3.9 4.1 ms Off-Hook delay time Tdly -- -- 300 -- ms DTMF FREQUENCY OUTPUT (fosc=3.579545MHz) Keyboard Scanning Pin CCITT Standard(Hz) Actual Output 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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