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SC9102C Datasheet(PDF) 9 Page - Silan Microelectronics Joint-stock |
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SC9102C Datasheet(HTML) 9 Page - Silan Microelectronics Joint-stock |
9 / 16 page Silan Semiconductors SC9102C/D HANGZHOU SILAN MICROELECTRONICS CO.,LTD. Rev: 2.0 2001-11-02 9 TEST CIRCUIT A HKS VSS MODE VDD DP DP DT keyboard Operation current 1 2 Standby current V+ Tone output voltage 3 Tone distortion 4 keyboard HKS VSS TONE VDD V+ keyboard counter and AC meter 10K Ω HKS VSS TONE VDD V+ Spectrum analyzer V 10K Ω A HKS VDD VSS V+ HKS VSS R* VDD Keypad input current (row group) 7 V+ C* ROW MODE A Pulse output sink current (open drain structure) 5 6 Pulse output sink current (inverter structure) 8 HKS VSS R* VDD V+ C* COLUMN MODE A PO Flash key HKS VSS VDD V+ V VEXT A PO VSS VDD V+ HKS V VEXT A keypad input current (column group) Note: 1. Dist. (dB)=20log {[V 1 2+V 2 2+V 3 2+…V n 2)1/2 ]/[(V L 2+V H 2)1/2 ]} a. V1…Vn are extraneous frequencies (ie, inter modulation and harmonic), components in the 500Hz to 3400Hz band. b. V L,VH are the individual frequency components of DTMF signal. c. Whether keyboard is pushed refer to the TONE mode time diagram. 2. Sink current Isink=I/(1-Duty Cycle), I is the net DC current measured from ampere meter. |
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