Datasheet

RE46C122
CMOS Ionization Smoke Detector ASIC with R&E International
Interconnect and Timer Mode
A Subsidiary of Microchip Technology Inc.
Product Specification
© 2009 Microchip Technology Inc. DS22173B-page 3
DC Electrical Characteristics – Continued
Limits
Parameter Symbol
Test
Pin Test Conditions
Min Typ Max Units
VG
OS1
14,15
Guard Amplifier
-50 50 mV
VG
OS2
15,16
Guard Amplifier
-50 50 mV
Offset Voltage
VG
OS3
13,15
Smoke Comparator
-50 50 mV
V
CM1
14,15
Guard Amplifier, Note 2
2
V
DD
-.5
V
Common Mode Voltage
V
CM2
13,15
Smoke Comparator, Note 2 .5 V
DD
-2
V
Output Impedance
Z
OUT
14,16
Guard Amplifier Outputs, Note 2
10
kΩ
Hysteresis
V
HYS
13
No Alarm to Alarm Condition
90 130 170 mV
Note 1: Sample test only.
Note 2: Not 100% production tested.
Note 3: Production test at room with temperature guardbanded limits.
AC Electrical Characteristics at TA = 25°C, VDD=9V, OSCAP=.1uF, RBIAS=8.2MΩ, VSS=0V (unless
otherwise noted)
Limits
Parameter Symbol
Test
Pin Test Conditions
Min Typ Max Units
T
PER1
12
No Alarm Condition
1.34 1.67 2 S
Oscillator Period
T
PER2
12
Alarm Condition
37.5 41.5 45.8 mS
Oscillator Pulse Width
T
PW
5
Operating
9.4 10.5 12.9 mS
LED On Time
T
LON
5
Operating
9.4 10.5 12.9 mS
T
LOF1
5
Standby, No Alarm
32 40 48 S
T
LOF2
5
Alarm Condition
.8 1 1.2 S
LED Off Time
T
LOF3
5
Timer Mode, No Alarm
8 10 12 S
T
HON1
10,11
Operating, Alarm Condition, Note 4
450 500 550 mS
Horn On Time
T
HON2
10,11
Low Battery, No Alarm
9.4 10.5 12.9 mS
T
HOF1
10,11
Operating, Alarm Condition, Note 4
450 500 550 mS
T
HOF2
10,11
Operating, Alarm Condition, Note 4
1.35 1.5 1.65 S
Horn Off Time
T
HOF3
10,11
Low Battery, No Alarm
32 40 48 S
IO Charge Dump Duration
T
IODMP
2
At Conclusion of Local Alarm or Test
1.34 1.67 2.0 S
IO Delay
T
IODLY1
2
From Start of Local Alarm to IO Active
3 S
IO Filter
T
IOFILT
2
IO pulse width guaranteed to be filtered.
IO as Input, No Local Alarm
450 mS
Remote Alarm Delay
T
IODLY2
2
No Local Alarm, IO as input, From IO
active to Horn Active
.450 2.2 S
Timer Period
T
TPER
4
No Alarm
8 10 12 Min
Note 4 – See timing diagram for horn temporal pattern.
All timing except for T
PER
and T
PW
are guaranteed by functional tests.