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U3810BM Datasheet(PDF) 24 Page - TEMIC Semiconductors

No. de pieza U3810BM
Descripción Electrónicos  Multi Standard Feature Phone Integrated Circuit
PDF  31 Pages
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Fabricante Electrónico  TEMIC [TEMIC Semiconductors]
Página de inicio  http://www.temic.de
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U3810BM Datasheet(HTML) 24 Page - TEMIC Semiconductors

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TELEFUNKEN Semiconductors
U3810BM
Rev. A1: 19.01.1996
24 (31)
Power-on-reset and reset pin
The system (U3810BM + microcontroller) is woken up by
an initial condition:
– line voltage
(VL)
– ringer
(THA)
– external supply
(ESI)
To avoid undefined states of the system when it is powered
on, an internal reset clears the internal registers, and
maintains pin RESET low during trt.
1.) Power on in speed-up condition (VDD < VSON)
LINE
LVIO
SHUTDOWN
VDD
CO
RESETN
937609
Figure 11
2.) Power on without speed-up (VDD > VSON)
LINE
LVIO
SHUTDOWN
VDD
CO
RESETN
937610
Figure 12



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