RE46C162E MICROCHIP [Microchip Technology], RE46C162E Datasheet - Page 4

• Manufacturer Part Number: RE46C162E
• Description: CMOS Ionization Smoke Detector ASIC with Interconnect, Timer Mode and Alarm Memory
• Manufacturer: MICROCHIP [Microchip Technology]

RE46C162/163
DS22245A-page 4
Battery
Note 1: Select R5 and R6 for the correct level to test the ion chamber. The voltage level on pin 1 (TSTART) must be
9V
+
2: Select R9 to reduce sensitivity during the timer mode.
3: R3, R4 and C1 are typical values and may be adjusted to maximize sound pressure.
4: C2 should be located as close as possible to the device power pins.
5: Route the pin 8 PC board trace away from pin 7 to avoid coupling.
-
RE46C162 Typical Application – 2/3 Duty Cycle Continuous Tone Horn Pattern
To Other
greater than the VIH level to initiate the timer. Pin 1 has an internal 180K nominal pull down which must be
considered.
Units
1 µF
C2
Dled
R2
390
100
R7
R1
8.2M
1
2
3
4
5
6
7
8
TSTART
IO
TONE
TSTROBE
LED
V
RBIAS
FEED
DD
100K
R5
GUARD2
DETECT
GUARD1
OSCAP
VSEN
V
HS
HB
SS
16
15
14
13
10
12
11
9
TEST and HUSH
R3
1.5M
R9
 2010 Microchip Technology Inc.
R4
220K
R6
68K
C1
.001 µF
.1 µF
C3