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W91550DNF-1 Datasheet(PDF) 4 Page - Winbond |
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W91550DNF-1 Datasheet(HTML) 4 Page - Winbond |
4 / 32 page W91550DN SERIES - 4 - Pin Description, continued SYMBOL PIN I/O FUNCTION DTMF 35 O In pulse mode, this pin remains in low state at all times. In tone mode, it will output a dual or single tone. A detailed timing diagram for tone mode is shown in Figure 2(a), 2(b), 2(c) 2(d). Specified Actual Error % Output Frequency R1 R2 R3 R4 C1 C2 C3 697 770 852 941 1209 1336 1477 699 766 848 948 1216 1332 1472 +0.28 -0.52 -0.47 +0.74 +0.57 -0.30 -0.34 VDD, VSS 38, 34 I Power input pins. B/M 36 I Make: Break ratio select pin. If B/M = VDD, the M/B ratio is 40:60. If B/M = VSS, the M/B ratio is 33.3:66.7. B/M pin is pulled to VDD by internal resistor. S/ M 26 I Save and mercury select pin. If S/ M = VDD, the save function is selected. If S/ M = VSS, the mercury function is selected. S/ M pin is pulled to VDD by internal resistor. ATS 41 I If ATS = VDD, the auto timer function is enabled. If ATS = VSS, the auto timer function is disabled. ATS pin is pulled to VDD by internal resistor. |
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