R&E International
RE46C160
CMOS Alarm ASIC
Preliminary Product Specification
General Description
The RE46C160 is a low power CMOS general purpose
alarm detector IC which provides an interface to a
piezoelectric horn and LED for signaling and
notification. With a few external components this IC can
provide many features for a variety of alarm
applications. In addition low standby current makes this
circuit ideal in battery powered applications.
Typical applications include personal, home and auto
anti-theft type alarms and liquid level or temperature
sensing alarms.
An internal oscillator strobes power to the detection
circuitry for 10.5mS every 1.66 seconds to keep
standby current to a minimum. A check for a low
battery condition is performed every 40 seconds when
in standby.
Features
•
•
•
•
•
•
•
•
Guard Outputs for Detect Input
Low leakage MOSFET input comparator
Internal Reverse Battery Protection
Internal Low Battery Detection
Low Quiescent Current Consumption (<6uA)
Available in 16L PDIP or 16L N SOIC
ESD Protection on all Pins
Compatible with MC14600
Pin Configuration
DETCOMP
N/C
LBADJ
LBCOMP
LED
VDD
RBIAS
FEED
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
GUARD2
ALARM
GUARD1
VSEN
OSCAP
HS
HB
VSS
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Supply Voltage
Input Voltage Range Except FEED
FEED Input Voltage Range
Reverse Battery Time
Input Current except FEED
Operating Temperature
Storage Temperature
Maximum Junction Temperature
SYMBOL
V
DD
V
in
V
infd
T
RB
I
in
T
A
T
STG
T
J
VALUE
15
-.3 to V
dd
+.3
-10 to +22
5
10
-40 to 85
-55 to 125
150
UNITS
V
V
V
S
mA
°C
°C
°C
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are
stress ratings only and operation at these conditions for extended periods may affect device reliability.
This product utilizes CMOS technology with static protection; however proper ESD prevention procedures should be used
when handling this product. Damage can occur when exposed to extremely high static electrical charge
Telephone 610.992.0727
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E-mail: rande@randeint.com
DS-RE46C160-070904
This datasheet contains PROPRIETARY and CONFIDENTIAL information.
Facsimile 610.992.0734
RE46C160
CMOS Alarm ASIC
Preliminary Product Specification
R&E International
DC Electrical Characteristics at TA = 25°C, VDD=9V, VSS=0V (unless otherwise noted)
Test
Pin
6
6
6
8
8
15
8
15
8
5
10,11
1,4
10,11
1,4
5
6
3
14,15
15,16
13,15
14,15
13,15
6,8
Guard Amplifier
Guard Amplifier
Alarm Comparator
Guard Amplifier, Note 2
Alarm Comparator, Note 2
Guard Amplifier Outputs, Note 2
Parameter
Supply Voltage
Supply Current
Symbol
V
DD
I
DD1
I
DD2
V
IH
V
IL
IL
DET1
IL
FD
IH
DET1
IH
FD
I
OHZ
V
OH1
V
OH2
V
OL1
V
OL2
V
OL3
Test Conditions
Operating
RBIAS=8.2MΩ, OSCAP=.1uF
RBIAS=8.2MΩ, OSCAP=.1uF;Vdd=12V
Min
6
Limits
Typ
Max
12
4.5
6
9
Units
V
uA
uA
V
V
nA
uA
nA
uA
uA
V
V
Input Voltage High
Input Voltage Low
Input Leakage Low
FEED input
FEED input
VDD=9V, ALARM=VSS
FEED=-10V
VDD=9V, DETECT=VDD, 0-40% RH
FEED=22V
LED Off
IOH=-16mA, VDD=7.2V
IOH=-30ua
IOL=16mA, VDD=7.2V
IOL=30ua
IOL=10mA, VDD=7.2V
T
A
=-10 to 60ºC, Note 3
6.2
2.7
-100
-50
100
50
1
6.3
8.5
.9
.5
3
7.2
-50
-50
-50
2
.5
10
7.5
65.5
50
50
50
V
DD
-.5
V
DD
-2
7.8
Input Leakage High
Output Off Leakage High
Output Voltage High
Output Voltage Low
V
V
V
V
%V
DD
mV
mV
mV
V
V
kΩ
Low Battery Voltage
Internal Sensitivity Set Voltage
Offset Voltage
V
LB
V
SET2
VG
OS1
VG
OS2
VG
OS3
Common Mode Voltage
V
CM1
V
CM2
Z
OUT
Output Impedance
Note 2: Not 100% production tested
Note 3: Production test at room with temperature guardbanded limits.
Telephone 610.992.0727
Page 2 of 7
E-mail: rande@randeint.com
DS-RE46C160-070904
This datasheet contains PROPRIETARY and CONFIDENTIAL information.
Facsimile 610.992.0734
RE46C160
CMOS Alarm ASIC
Preliminary Product Specification
R&E International
AC Electrical Characteristics at TA = 25°C, VDD=9V, OSCAP=.1uF, RBIAS=8.2MΩ, VSS=0V (unless
otherwise noted)
Test
Pin
12
12
5
5
5
5
10,11
10,11
10,11
10,11
Parameter
Oscillator Period
Symbol
T
PER1
T
PER2
T
PW
T
LON
T
LOF1
T
LOF2
T
HON1
T
HON2
T
HOF1
T
HOF3
Test Conditions
No Alarm Condition
Alarm Condition
Operating
Operating
Standby, No Alarm
Alarm Condition
Operating, Alarm Condition
Low Battery, No Alarm
Operating, Alarm Condition
Low Battery, No Alarm
Min
1.34
37.5
9.1
9.1
32
.9
141
9.1
71
32
Limits
Typ
Max
1.67
41.5
10.5
10.5
40
1
166
10.5
83
40
2
45.8
12.5
12.5
48
1.1
190
12.5
95
48
Units
S
mS
mS
mS
S
S
mS
mS
mS
S
Oscillator Pulse Width
LED On Time
LED Off Time
Horn On Time
Horn Off Time
Functional Block Diagram
Figure 1
Telephone 610.992.0727
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E-mail: rande@randeint.com
DS-RE46C160-070904
This datasheet contains PROPRIETARY and CONFIDENTIAL information.
Facsimile 610.992.0734
RE46C160
CMOS Alarm ASIC
Preliminary Product Specification
R&E International
DEVICE DESCRIPTION and APPLICATION NOTES
Note: All timing references are nominal values. Refer to the electrical specifications for limits
Internal Timing – With external components as indicated on the application drawing the period of the
oscillator is 1.67 seconds in standby. Every 1.66 seconds the detection circuitry is powered up for
10.5mS and the status of the detect comparator is latched. In addition every 40 seconds the LED driver is
turned on for 10.5mS and the status of the low battery comparator is latched. The detect comparator
status is not checked during the low battery test, during the low battery horn warning chirp, or when the
horn is on due to an alarm condition.
If an alarm condition is detected the oscillator period increases to 41.5mS.
Due to the low currents used in the oscillator the capacitor on pin 12 should be a low leakage type.
Oscillator accuracy will depend mainly on the tolerance of the RBIAS resistor and OSCAP capacitor.
Alarm Circuit – The alarm comparator compares the alarm voltage to a voltage derived from a resistor
divider across VDD. . This divider voltage must be provided externally on pin 13 (VSEN). See the
application drawing (FIG 2). In an alarm condition the horn is turned on for 167mS and turned off for
87ms.
The guard amplifier and outputs are always active and will be within 50mV of the DETECT input. The
guard outputs also allow for measurement of the DETECT input without loading the sensing element.
Low Battery Detection – An internal reference is compared to the voltage divided VDD supply. The
battery can be checked under load via the LED low side driver output since low battery status is latched
at the end of the 10mS LED pulse. Pin 3 (LBADJ) can be used to modify the low battery set point by
placing a resistor to VDD or VSS.
LED Pulse – The LED is pulsed on for 10.5mS every 40S in standby. In alarm the LED is pulsed on for
10.5mS every 1S.
Testing – By holding pin 12 (OSCAP) low the internal power strobe is active and pins 1 (DETCOMP) and
4 (LBCOMP) can be used to check for alarm and low battery respectively. Please refer to the timing
diagrams.
Telephone 610.992.0727
Page 4 of 7
E-mail: rande@randeint.com
DS-RE46C160-070904
This datasheet contains PROPRIETARY and CONFIDENTIAL information.
Facsimile 610.992.0734
RE46C160
CMOS Alarm ASIC
Preliminary Product Specification
R&E International
Typical Application
Figure 2
Notes:
1) C2 should be located as close as possible to the device power pins.
2) The value of R2 should be selected to maintain proper battery loading during the low battery test.
Telephone 610.992.0727
Page 5 of 7
E-mail: rande@randeint.com
DS-RE46C160-070904
This datasheet contains PROPRIETARY and CONFIDENTIAL information.
Facsimile 610.992.0734
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