RE46C162E MICROCHIP [Microchip Technology], RE46C162E Datasheet

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RE46C162E

Manufacturer Part Number
RE46C162E
Description
CMOS Ionization Smoke Detector ASIC with Interconnect, Timer Mode and Alarm Memory
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.RE46C162E.pdf (22 pages)
Features
• Pin Selectable Horn Patterns
• Alarm Memory
• Sensitivity Control Timer:
• >1500V ESD Protection (HBM) on All Pins
• Guard Outputs for Ion Detector Input
• ±0.75 pA Detect Input Current
• Internal Reverse Battery Protection
• Low Quiescent Current Consumption (<6.5 µA)
• I/O Filter and Charge Dump
• Internal Low Battery Detection
• Power-up Low Battery Test
• Interconnect up to 66 Detectors
• RoHS Compliant, Lead Free Packaging
 2010 Microchip Technology Inc.
- 8 minute Timer for RE46C162
- 1 minute Timer for RE46C163
CMOS Ionization Smoke Detector ASIC with Interconnect,
Timer Mode and Alarm Memory
RE46C162/163
Description
The RE46C162/163 devices are low-power, CMOS
ionization type, smoke detector ICs. With few external
components, these circuits will provide all the required
features for an ionization type smoke detector.
An internal oscillator strobes power to the smoke
detection circuitry for 10.5 ms every 1.67 seconds to
keep standby current to a minimum. A check for a low
battery condition is performed every 40 seconds when
in standby. The temporal horn pattern supports the
NFPA 72 emergency evacuation signal.
An interconnect pin allows multiple detectors to be
connected so when one unit alarms, all units will sound.
A charge dump feature will quickly discharge the inter-
connect line when exiting a local alarm. The intercon-
nect input is also digitally filtered.
An internal timer allows for a single button, push-to-test
to be used for a reduced sensitivity mode.
An alarm memory feature allows the user to determine
if the unit has previously entered a local alarm
condition.
Utilizing
RE46C162/163 devices are designed for use in smoke
detectors that comply with Underwriters Laboratory
Specification UL217 and UL268.
Package Types
TSTROBE
TSTART
RBIAS
TONE
FEED
LED
V
low-power
IO
DD
1
2
3
4
5
6
7
8
RE46C162/163
PDIP
CMOS
16
15
14
13
12
11
10
9
technology,
DS22245A-page 1
GUARD2
DETECT
GUARD1
OSCAP
VSEN
HS
HB
V
SS
the

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RE46C162E Summary of contents

Page 1

CMOS Ionization Smoke Detector ASIC with Interconnect, Timer Mode and Alarm Memory Features • Pin Selectable Horn Patterns • Alarm Memory • Sensitivity Control Timer minute Timer for RE46C162 - 1 minute Timer for RE46C163 • >1500V ESD ...

Page 2

RE46C162/163 Functional Block Diagram TONE (3) Reference V ( 760K - R3 340K TSTART (1) VSEN (13) R4 1100K GUARD1 (14) DETECT (15 GUARD2 (16) V (9) SS Guard Amp DS22245A-page 2 Low Battery Comparator ...

Page 3

Typical Applications RE46C162 Typical Application – Temporal Horn Pattern To Other R7 Units 100 Dled R8 1.5K R2 390 + µF 8.2M Battery C2 - Note 1: Select R5 and R6 for the correct level to test ...

Page 4

RE46C162/163 RE46C162 Typical Application – 2/3 Duty Cycle Continuous Tone Horn Pattern To Other R7 Units 100 Dled R2 390 + µF 8.2M Battery - C2 Note 1: Select R5 and R6 for the correct level to ...

Page 5

ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings† V ....................................................................................15V DD Input Voltage Range Except FEED, I/O ........... V FEED Input Voltage Range .................... V INFD I/O Input Voltage Range................................V Reverse Battery Time ...............................................T Input Current except FEED ................................... I Operating Temperature ...

Page 6

RE46C162/163 DC ELECTRICAL CHARACTERISTICS (CONTINUED) DC Electrical Characteristics: Unless otherwise indicated, all parameters apply at T OSCAP = .1 µF, RBIAS = 8.2 M Parameter Symbol Output Low Voltage V OL1 V OL2 V OL3 Output Current I ...

Page 7

AC ELECTRICAL CHARACTERISTICS (CONTINUED) AC Electrical Characteristics: Unless otherwise indicated, all parameters apply at T OSCAP = .1 µF, RBIAS = 8.2 M Parameter Symbol Horn On Time T HON1 T HON2 T HON3 Horn Off Time T ...

Page 8

RE46C162/163 NOTES: DS22245A-page 8  2010 Microchip Technology Inc. ...

Page 9

PIN DESCRIPTIONS The descriptions of the pins are listed in TABLE 2-1: PIN FUNCTION TABLE RE46C162/163 Name PDIP, SOIC 1 TSTART 2 I/O 3 TONE 4 TSTROBE 5 LED RBIAS 8 FEED ...

Page 10

RE46C162/163 NOTES: DS22245A-page 10  2010 Microchip Technology Inc. ...

Page 11

DEVICE DESCRIPTION 3.1 Internal Timing With external components as indicated on the application drawing, the period of the oscillator is nominally 1.67 seconds in standby. 1.67 seconds, the detection circuitry is powered up for 10.5 ms and the status ...

Page 12

RE46C162/163 3.8 Alarm Memory If a detector has entered a local alarm, once it exits the local alarm, the alarm memory latch is set. Initially the LED can be used to visually identify any unit that had previously been in ...

Page 13

Oscillator T PW Internal Clock TSTART T LOF3 LED Outputs High Z TSTROBE FIGURE 3-2: Timing Diagram –Timer Mode. Alarm, No Low Battery Memory; No Alarm; No Low Battery LED LON HB TSTART ...

Page 14

RE46C162/163 NOTES: DS22245A-page 14  2010 Microchip Technology Inc. ...

Page 15

PACKAGING INFORMATION 4.1 Package Marking Information 16-Lead PDIP XXXXXXXXXXXXXX XXXXXXXXXXXXXX YYWWNNN Legend: XX...X Customer-specific information Y Year code (last digit of calendar year) YY Year code (last 2 digits of calendar year) WW Week code (week of January 1 ...

Page 16

RE46C162/163 /HDG 3ODVWLF 'XDO ,Q /LQH 3 ± 1RWH 1RWHV DS22245A-page 16 PLO %RG\ >3',3@  2010 Microchip Technology Inc. ...

Page 17

APPENDIX A: REVISION HISTORY Revision A (March 2010) • Original Release of this Document.  2010 Microchip Technology Inc. RE46C162/163 DS22245A-page 17 ...

Page 18

RE46C162/163 NOTES: DS22245A-page 18  2010 Microchip Technology Inc. ...

Page 19

... PART NO. /X Device Number Package of Pins Device RE46C162: CMOS Ionization Smoke Detector RE46C163: CMOS Ionization Smoke Detector Package E = Plastic Dual In-Line, 300 mil. Body, 16-Lead (PDIP)  2010 Microchip Technology Inc. RE46C162/163 . Examples: a) RE46C162E16F: 16LD PDIP Package. b) RE46C163E16F: 16LD PDIP Package. DS22245A-page 19 ...

Page 20

RE46C162/163 NOTES: DS22245A-page 20  2010 Microchip Technology Inc. ...

Page 21

Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families ...

Page 22

W ORLDWIDE AMERICAS ASIA/PACIFIC Corporate Office Asia Pacific Office 2355 West Chandler Blvd. Suites 3707-14, 37th Floor Chandler, AZ 85224-6199 Tower 6, The Gateway Tel: 480-792-7200 Harbour City, Kowloon Fax: 480-792-7277 Hong Kong Technical Support: Tel: 852-2401-1200 http://support.microchip.com Fax: 852-2401-3431 ...

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