RE46C162E MICROCHIP [Microchip Technology], RE46C162E Datasheet - Page 9

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

2.0
The descriptions of the pins are listed in
TABLE 2-1:
 2010 Microchip Technology Inc.
RE46C162/163
PDIP, SOIC
10
12
13
14
15
16
11
1
2
3
4
5
6
7
8
9
PIN DESCRIPTIONS
PIN FUNCTION TABLE
TSTROBE
GUARD1
GUARD2
DETECT
TSTART
OSCAP
RBIAS
Name
TONE
FEED
VSEN
LED
V
V
I/O
HB
HS
DD
SS
This input is used to invoke the push-to-test alarm, alarm memory indication,
and the timer mode. This input has an internal pull-down.
This bidirectional pin provides the capability to interconnect many detectors in a
single system. This pin has an internal pull-down.
This pin selects the NFPA72 horn tone (high) or the 2/3 duty cycle continuous
tone (low).
This pin is strobed on with the internal clock in timer mode. A resistor
connected to this pin is used to modify the detector sensitivity for the timer
period.
Open drain NMOS output used to drive a visible LED.
Connect to the positive supply voltage.
A resistor connected between this pin and V
Usually connected to the feedback electrode through a current limiting resistor.
If not used, this pin must be connected to V
Connect to the negative supply voltage.
This pin is connected to the metal electrode of a piezoelectric transducer.
HS is a complementary output to HB and connects to the ceramic electrode of
the piezoelectric transducer.
A capacitor connected between this pin and V
This pin can be used to modify the set point for the smoke comparator by use of
external resistors to V
Output of the guard amplifier.
Connect to the collector electrode (CEV) of the ion smoke chamber.
Output of the guard amplifier.
Table
2-1.
DD
or V
SS
.
Description
RE46C162/163
DD
DD
SS
or V
sets the internal bias current.
sets the oscillator timing.
SS
.
DS22245A-page 9