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RE46C112 Datasheet

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R&E International
RE46C112
Ionization Smoke Detector IC
Product Specification
General Description
The RE46C112 is an ionization type smoke detector IC.
It is intended for applications using ionization type
chambers to detect smoke. When enabled, VOUT is ¼
of either the DETECT input or VDD depending on the
status of the SELECT input. When the Select input is
allowed to float the circuit is in the low current mode
with only the guard amplifier enabled.
Utilizing low power CMOS technology the RE46C112
was designed for use in smoke detectors that comply
with Underwriters Laboratory Specification UL217.
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Supply Voltage
Supply Voltage
Detect Input Voltage Range
SELECT Input Voltage Range
Operating Temperature
Storage Temperature
Maximum Junction Temperature
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
Page 1 of 5
This datasheet contains PROPRIETARY and CONFIDENTIAL information.
Features
Guard Outputs for Ion Detector Input
± 0.75pA Detect Input Current
Microprocessor A/D Compatible Analog Output
Low Quiescent Current Consumption (<10uA)
Available in 8L PDIP or 8L N SOIC
2000V ESD Protection (HBM)
Available in Standard Packaging or RoHS
Compliant Pb Free Packaging
Pin Configuration
1
VDD
VCC
SELECT
VSS
SYMBOL
VALUE
V
12.5
DD
V
CC
V
V
INDET
DD
V
V
INSEL
CC
T
-10 to 60
A
T
-55 to 125
STG
T
150
J
Facsimile 610.992.0734
8
G 2
DETECT
G 1
VO UT
UNITS
V
6
V
+.3
V
+.3
V
°C
°C
°C
E-mail: rande@randeint.com
DS-RE46C112-011207

Summary of Contents

Page 1

... RE46C112 Ionization Smoke Detector IC Product Specification General Description The RE46C112 is an ionization type smoke detector IC intended for applications using ionization type chambers to detect smoke. When enabled, VOUT is ¼ of either the DETECT input or VDD depending on the status of the SELECT input. When the Select input is allowed to float the circuit is in the low current mode with only the guard amplifier enabled ...

Page 2

... DETECT VDD-.5V, SELECTVCC, RL10K 5 Facsimile 610.992.0734 R&E International Limits Min Typ Max Units 2 2. 0.4 V -0.75 0.75 pA -1.5 1 .25V DD 20mV 20mV V - .25V DETECT V 20mV 20mV E-mail: rande@randeint.com DS-RE46C112-011207 ...

Page 3

... PIN 7 (DETECT) - This input is typically interfaced to an ionization chamber to sense the presence of smoke. Input leakage is less than ±.75pA on this input. Telephone 610.992.0727 Page This datasheet contains PROPRIETARY and CONFIDENTIAL information. PIN DESCRIPTIONS Facsimile 610.992.0734 R&E International E-mail: rande@randeint.com DS-RE46C112-011207 ...

Page 4

... RE46C112 Ionization Smoke Detector IC Product Specification Telephone 610.992.0727 Page This datasheet contains PROPRIETARY and CONFIDENTIAL information. Functional Block Diagram Figure 1 Facsimile 610.992.0734 R&E International E-mail: rande@randeint.com DS-RE46C112-011207 ...

Page 5

... A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system affect its safety or effectiveness. Telephone 610.992.0727 Page This datasheet contains PROPRIETARY and CONFIDENTIAL information. Typical Application Figure 2 Facsimile 610.992.0734 R&E International E-mail: rande@randeint.com DS-RE46C112-011207 ...

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