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RE46C165SW Scheda tecnica(PDF) 12 Page - Microchip Technology

Il numero della parte RE46C165SW
Spiegazioni elettronici  CMOS Photoelectric Smoke Detector ASIC with Interconnect, Timer Mode and Alarm Memory
PDF  30 Pages
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Produttore elettronici  MICROCHIP [Microchip Technology]
Homepage  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

RE46C165SW Scheda tecnica(HTML) 12 Page - Microchip Technology

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RE46C165/6/7/8
DS22251A-page 12
 2010 Microchip Technology Inc.
2.9
Horn Feedback Pin (FEED)
Usually this pin is connected to the feedback electrode
through a current limiting resistor. If not used, this pin
must be connected to VDD or VSS.
When the horn is enabled, FEED drives the buffered
output HS pin and the complementary output HB pin.
2.10
LED Driver Pin (LED)
This pin is an open drain NMOS output used to drive a
visible LED.
2.11
Oscillator Capacitor Input (COSC)
A capacitor connected to this pin, with a parallel
resistor, sets the internal clock low time, which is
approximately the clock period.
2.12
Oscillator Resistor Drive Low
(ROSC)
A resistor between this pin and COSC pin sets the
internal clock high time. This also sets the IRED pulse
width.
2.13
Hush Timer Sensitivity Pin (VSEN)
In Timer mode, this input pin can be used to set an
external smoke comparator reference.
2.14
TEST Pin
This input is used to invoke two test modes and the
Timer mode. This input has an internal pull-down.



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