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MC146012ED Folha de dados(PDF) 11 Page - Freescale Semiconductor, Inc

Nome de Peças MC146012ED
Descrição Electrónicos  Low Power CMOS Photoelectric Smoke Detector IC
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Fabricante Electrônico  FREESCALE [Freescale Semiconductor, Inc]
Página de início  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC146012ED Folha de dados(HTML) 11 Page - Freescale Semiconductor, Inc

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MC146012
Table 4. MC146012 Test Mode Logic Table
Pin
Function
Type
Logic
Description
Pin 16, TEST
Test Mode 1 Trigger
Input
None
Set a –Ve voltage to the pin and source 100
µA from
the pin to start Test Mode 1.
Pin 12, OSC CAP
Clock Input
Input
0
Internal clock low
1
Internal clock high
Pin 5, VDD
Chip Power
Pin 14, VSS
Chip Ground
Pin 11, LED
Built-in-Test for HUSH
Timer
Output
Output pulse active low for 8 Clocks every 128
Clocks.
Pin 4, STROBE
Analog Ground
Output
Output low when pin 12 is low.
Pin 6, IRED
IRED
Output
0
Output low when pin 12 is low.
1
Output high (3.0 V) when pin 12 is high.
Pin 3, DETECT
Smoke Sensing Input
Input
NO SMK: VDD-2.5 V – (1/Hi Gain)
SMK: VDD-2.5 V –(1/Low Gain)
HI SMK: VDD-2.5 V – (2/Low Gain)
Pin 8, BRASS
Smoke Latch Indicator
Output
0
Output low when smoke latch not set.
1
Output high when smoke latch set.
Pin 9, SILVER
Photo-Comparator
Indicator
Output
0
Output low when photo comparator not set.
1
Output high when photo comparator set.
Pin 7, I/O
Photo-Amp Routing
Enable
Input
0
Disable the function of Pin 1, 2, 10 and 15 in Test
Mode 1.
1
Enable photoamplifier output routed to the pins and
enable pins 1, 2, 10 and 15 in test Mode 1.
Pin 15, LOW_BATT
Low Battery Trip Point
Input
Control photo amp. Gain and output routing
Pin 10, FEEDBACK
Feedback
Input
Control hysteresis


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