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?2011 Microchip Technology Inc.
DS22275A-page 7
RE46C180
Low Battery
Low Battery Check
Period
T
PLB1

76
80
84
s
Standby, No Alarm,
No Low Battery
T
PLB2

304
320
336
s
Standby, No Alarm, Low
Battery
Horn Operation
Horn Delay
T
HDLY1
10, 11
475
500
525
ms
From Local Alarm to Horn
Active, temporal horn pattern
T
HDLY2
10, 11
380
400
420
ms
From Local Alarm to Horn
Active, continuous horn
pattern
Horn Period
T
HPER1
10, 11
38
40
42
s
Low Battery, No Alarm
T
HPER2
10, 11
38
40
42
s
Chamber Failure, No Alarm
T
HPER3
10, 11
237
250
263
ms
Alarm Memory Indication
upon PTT, AMHCEn=1
T
HPER4
10, 11
5.5
5.8
6.1
s
CO Alarm horn period
(Note 2)
Horn On Time
T
HON1
10, 11
9.5
10
10.5
ms
1.   Low Battery, No Alarm
2.   Chamber Failure
3.   Alarm Memory
Indication upon PTT,
AMHCEn = 1
T
HON2
10, 11
475
500
525
ms
Smoke Alarm, temporal horn
pattern (Note 3)
T
HON3
10, 11
332
350
368
ms
Smoke Alarm, continuous
horn pattern (Note 3)
T
HON4
10, 11
95
100
105
ms
CO Alarm, COEn = 1
Horn Off Time
T
HOF1
10, 11
475
500
525
ms
Smoke Alarm, temporal horn
pattern (Note 3)
T
HOF2
10, 11
1.43
1.5
1.58
s
Smoke Alarm, temporal horn
pattern (Note 3)
T
HOF3
10, 11
143
150
158
ms
Smoke Alarm, continuous
horn pattern (Note 3)
T
HOF4
10, 11
37
39
41
s
Chamber Fail horn off time
between pulse trains (3x)
T
HOF5
10, 11
465
490
515
ms
Chamber Fail horn off time
between pulses
T
HOF6
10, 11
95
100
105
ms
CO Alarm horn off time
between pulses,
COEn = 1 (Note 2)
T
HOF7
10, 11
4.8
5.1
5.4
s
CO alarm horn off time
between pulse trains,
COEn = 1 (Note 2)
AC ELECTRICAL CHARACTERISTICS (CONTINUED)
AC Electrical Characteristics: Unless otherwise indicated, all parameters apply at T
A
 = -10癈 to +60癈,
V
DD
= 9V, V
SS
= 0V.
Parameter
Symbol
Test
Pin
Min
Typ
Max
Units
Conditions
Note  1:   T
POSC
 is 100% production tested. All other timing is verified by functional testing.
2:   See timing diagram for CO alarm horn pattern.
3:   See timing diagram for smoke alarm temporal and non-temporal horn pattern.
4:   See timing diagram for horn synchronization and Auto Alarm Locate (AAL).
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