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Freescale Semiconductor Electronic Components Datasheet



MC145017

Low-Power CMOS Ionization Smoke Detector IC



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MC145017 pdf
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Technical Data
MC145017
Rev. 6.0, 3/2007
Low-Power CMOS
Ionization Smoke Detector IC
with Temporal Pattern Horn Driver
The MC145017, when used with an ionization chamber and a small number
of external components, will detect smoke. When smoke is sensed, an alarm is
sounded via an external piezoelectric transducer and internal drivers. This circuit
is designed to operate in smoke detector systems that comply with UL217 and
UL268 specifications.
Features
• Ionization Type with On-Chip FET Input Comparator
• Piezoelectric Horn Driver
• Guard Outputs on Both Sides of Detect Input
• Input-Production Diodes on the Detect Input
• Low-Battery Trip Point, Internally Set, can be Altered Via External Resistor
• Detect Threshold, Internally Set, can be Altered Via External Resistor
• Pulse Testing for Low Battery Uses LED for Battery Loading
• Comparator Outputs for Detect and Low Battery
• Internal Reverse Battery Protection
• Supports NFPA 72, ANSi 53.41, and ISO 8201 Audible Emergency
Evacuation Signals
• Pb-Free Packaging Designated by Suffix Code ED and EG
ORDERING INFORMATION
Device
Case No.
Package
MC145017P
MC145017ED
648-08
Plastic Dip
MCZ145017EG/R2 751G-04
SOICW
MC145017
LOW-POWER CMOS IONIZATION
SMOKE DETECTOR IC WITH
TEMPORAL PATTERN
HORN DRIVER
P SUFFIX
ED SUFFIX
(PB-FREE)
PLASTIC DIP
CASE 648-08
EG SUFFIX
(PB-FREE)
16-LEAD
SOICW
CASE 751G-04
DETECT COMP.
OUT
N/C
LOW V SET
LOW V COMP.
OUT
LED
VDD
TIMING
RESISTOR
FEEDBACK
1
2
3
4
5
6
7
8
16 GUARD Hi-Z
15 DETECT INPUT
14 GUARD LO-Z
13 SENSITIVITY SET
12 OSC CAPACITOR
11 SILVER
10 BRASS
9 VSS
DETECT
COMP. OUT
N/C
LOW V SET
LOW V
COMP. OUT
LED
VDD
TIMING
RESISTOR
FEEDBACK
1
2
3
4
5
6
7
8
16 GUARD HI-Z
15
DETECT
INPUT
14 GUARD LO-Z
13
SENSITIVITY
SET
12
OSC
CAPACITOR
11 SILVER
10 BRASS
9 VSS
Figure 1. . Pin Connections
Freescale Semiconductor, Inc. reserves the right to change the detail specifications, as may be required, to
permit improvements in the design of its products.
© Freescale Semiconductor, Inc., 2007. All rights reserved.



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MC145017 pdf
VDD
VDD
80 K
3
-
+
1045 K
13
1125 K
VDD
+
-
15
+
-
4
Low Battery Comp.
Latch
7
Oscillator
12
Latch
1
Detect Input
14 Lo-Z
Active
Guard
VDD
Piezoelectric
Horn Driver
8
11
10
VDD
5
6
9
LED Driver
16 HI-Z
Figure 2. Block Diagram
Table 1. Maximum Ratings(1)
(Voltages referenced to VSS)
Rating
Symbol
Value
Unit
DC Supply Voltage
Input Voltage, All Inputs Except Pin 8
DC Current Drain per Input Pin, Except Pin 15 = 1 mA
VDD
-0.5 to + 15
V
VIN
-0.25 to VDD +0.25
V
I 10 mA
DC Current Drain per Output Pin
I 30 mA
Operating Temperature Range
Storage Temperature Range
Reverse Battery Time
TA
TSTG
TRB
-10 to +60
-55 to +125
5.0
°C
°C
s
1. Maximum Ratings are those values beyond which damage to the device may occur.
This device contains circuitry to protect the inputs against damage due to high static voltages or electric fields; however, it is advised that
normal precautions be taken to avoid application of any voltage higher than maximum rated voltages to this high impedance circuit. For
proper operation it is recommended that VIN and VOUT be constrained to the range VSS (VIN or VOUT) VDD.
Table 2. Recommended Operating Conditions
(Voltages referenced to VSS)
Parameter
Supply Voltage
Timing Capacitor
Timing Resistor
Battery Load (Resistor or LED)
Symbol
VDD
Value
9.0
0.1
8.2
10
Unit
V
µF
M
mA
MC145017
2
Sensors
Freescale Semiconductor



Part Number MC145017
Description Low-Power CMOS Ionization Smoke Detector IC
Maker Freescale Semiconductor - Freescale Semiconductor
Total Page 10 Pages
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