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M75012 Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers

Part No. M75012
Description  PHOTOELECTRIC SMOKE DETECTOR WITH INTERCONNECT
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M75012 Datasheet(HTML) 1 Page - List of Unclassifed Manufacturers

 
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2006-10-05
PHOTOELECTRIC SMOKE DETECTOR
WITH INTERCONNECT
SMOKE DETECTOR
M75012
一華半導體股份有限公司
MOSDESIGN SEMICONDUCTOR CORP.
GENERAL DESCRIPTION
The M75012 is a very low-power IC providing all of the required features for a photoelectric type smoke detector.
This device can be used in conjunction with an infrared photoelectric chamber to sense scattered light from smoke particles.
A variable-gain photo amplifier can be directly interfaced to an infrared emitter / detector pair. The amplifier gain levels are
determined by two external capacitors that are then internally selected depending on the operating mode. Low gain is selected
during standby and timer modes. During a local alarm this low gain is increased ( internally ) by ~ 10% to reduce false triggering.
High gain is used during the push-button test and during standby to periodically monitor the chamber sensitivity.
FEATURES
‧ Interconnect up to 50 detectors.
‧ Piezoelectric horn driver.
‧ Power-on reset.
‧ Built-in circuits to reduce false triggering.
‧ 6V to 12V operating voltage range.
‧ ESD-Protection circuitry on all pins.
‧ Temporal horn pattern.
APPLICATIONS
‧ Smoke detector.
PIN ASSIGNMENT
C1
C2
DETECT
STROBE
VDD
IRED
I/O
TEST
HORN2
LED
HORN1
VSS
OSCR
TRIP
FEEDBACK
OSCC
116
89
M75012P


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