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RE46C145S16F Datasheet(PDF) 5 Page - Microchip Technology

Part # RE46C145S16F
Description  CMOS Photoelectric Smoke Detector ASIC with Interconnect and Timer Mode
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

RE46C145S16F Datasheet(HTML) 5 Page - Microchip Technology

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 2009-2012 Microchip Technology Inc.
DS22181C-page 5
RE46C145
AC ELECTRICAL CHARACTERISTICS
AC Electrical Characteristics:
Unless otherwise indicated, all parameters apply at TA = -25°C to +75°C, VDD =9V,
VSS = 0V, Component Values from Typical Application; R9 =100 K, R12 =10 M, C5 = 1.5 nF
Parameter
Symbol
Test
Pin
Min
Typ
Max
Units
Test Conditions
Oscillator Period
TPOSC
12
9.4
10.5
11.5
ms
No alarm condition
LED and STROBE
On Time
TON1
11,4
9.4
10.5
11.5
ms
Operating
LED Period
TPLED1
11
39
43
47
s
Standby, no alarm
TPLED2
11
.45
.5
.55
s
Local alarm condition
TPLED3
11
9.6
10.75
11.8
s
Timer mode, no local alarm
TPLED4
11
LED IS NOT ON
s
Remote alarm only
STROBE
and IRED Pulse
Period
TPER1
4,6
9.6
10.75
11.8
s
Standby, no alarm
TPER1A
4,6
1.8
2
2.2
s
Standby, after one valid smoke
sample
TPER1B
4,6
.9
1
1.1
s
Standby, after two consecutive
valid smoke samples
TPER2
4,6
.9
1
1.1
s
In Local Alarm (three consecu-
tive valid smoke samples)
TPER3
4,6
7.2
8
8.9
s
In Remote Alarm
TPER4
4,6
300
336
370
ms
Push-button test
TPER5
4,6
39
47
s
Chamber Test or Low Battery
Test, no alarms
IRED On Time
TON2
6
94
104
115
µs
Operating
Horn On Time
THON1
8,9
450
500
550
ms
Operating, alarm condition,
Note 1
THON2
8,9
9.5
10.5
11.5
ms
Low Battery or Failed Chamber
test , no alarm
Horn Off Time
THOF1
8,9
450
500
550
ms
Operating, alarm condition,
Note 1
THOF2
8,9
1.35
1.5
1.65
s
Operating, alarm condition,
Note 1
THOF3
8,9
39
43
47
s
Low Battery or Failed Chamber
test, no alarm
IO Charge
Dump Duration
TIODMP
7
.9
1.46
s
At the conclusion of the Local
Alarm or Test
IO Delay
TIODLY1
7
0
s
From start of Local Alarm to
IO Active
IO Filter
TIOFILT
7
600
mSs
IO pulse-width ensured to be
filtered. IO as input, no local
alarm
Remote
Alarm Delay
TIODLY2
7
1.05
2.0
s
No local alarm, from IO Active
to Horn Active
Timer Period
TTPER
7
8.5
10
Min
No alarm condition, Note 2
Note 1:
See timing diagram for Horn Temporal Pattern
2:
During the Timer mode, the LED period is 10.5 seconds. The LED period will return to 43 seconds at the
conclusion of the Timer mode.
3:
TPOSC and TON2 are 100% production tested. All other timing is ensured by functional testing.
4:
Typical values are for design information and are not ensured.


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