MOTOROLA MC145018P Lonization smoke detector ic with interconnect and temporal horn driver Datasheet

MOTOROLA
Freescale Semiconductor, Inc.
Order this document
by MC145018/D
SEMICONDUCTOR TECHNICAL DATA
MC145018
Low–Power CMOS
Freescale Semiconductor, Inc...
Ionization Smoke Detector IC
with Interconnect and
Temporal Horn Driver
16
1
P SUFFIX
PLASTIC DIP
CASE 648–08
The MC145018, 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.
• Ionization Type with On–Chip FET Input Comparator
ORDERING INFORMATION
MC145018P PLASTIC DIP
• Piezoelectric Horn Driver
• Guard Outputs on Both Sides of Detect Input
• Input–Protection Diodes on the Detect Input
PIN ASSIGNMENT
(16 PIN DIP)
• Low–Battery Trip Point, Internally Set, can be Altered Via External Resistor
• Detect Threshold, Internally Set, can be Altered Via External Resistor
Detect
Comp. Out
1
16
Guard Hi–Z
I/O
2
15
Detect Input
• Internal Reverse Battery Protection
Low V Set
3
14
Guard Lo–Z
• Strobe Output for External Trim Resistors
Strobe Out
4
13
Sensitivity Set
LED
5
12
Osc Capacitor
• Pulse Testing for Low Battery Uses LED for Battery Loading
• Comparator Output for Detect
• I/O Pin Allows Up to 40 Units to be Connected for Common Signaling
• Supports NFPA 72, ANSi 53.41, and ISO 8201
Audible Emergency Evacuation Signals
• Power–On Reset Places IC in Standby Mode
VDD
6
11
Silver
Timing
Resistor
7
10
Brass
Feedback
8
9
VSS
MAXIMUM RATINGS* (Voltages referenced to VSS)
Rating
Symbol
Value
*0.5 to + 15
Unit
DC Supply Voltage
VDD
Input Voltage, All Inputs Except Pin 8
Vin
*0.25 to VDD + 0.25
DC Current Drain per Input Pin, Except Pin 15 = 1 mA
I
10
mA
DC Current Drain per Output Pin
I
30
mA
Operating Temperature Range
TA
Storage Temperature Range
Tstg
*10 to + 60
*55 to + 125
Reverse Battery Time
tRB
5.0
V
V
°C
°C
s
* 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.
v
v
REV 3
Motorola
Sensor Device Data
 Motorola,
Inc. 2000
For More Information On This Product,
Go to: www.freescale.com
1
Freescale Semiconductor, Inc.
MC145018
RECOMMENDED OPERATING CONDITIONS (Voltages referenced to VSS)
Symbol
Value
Unit
VDD
9.0
V
Timing Capacitor
—
0.1
µF
Timing Resistor
—
8.2
MΩ
Battery Load (Resistor or LED)
—
10
mA
Parameter
Supply Voltage
ELECTRICAL CHARACTERISTICS (Voltages referenced to VSS, TA = 25°C)
Symbol
VDD
Vdc
Min
Typ
Max
Unit
Operating Voltage
VDD
—
6.0
—
12
V
Output Voltage
Piezoelectric Horn Drivers (IOH = 16 mA)
Comparators (IOH = 30 µA)
Piezoelectric Horn Drivers (IOL = + 16 mA)
Comparators (IOL = +30 µA)
VOH
7.2
9.0
7.2
9.0
6.3
8.5
—
—
—
8.8
—
0.1
—
—
0.9
0.5
Output Voltage — LED Driver, IOL = 10 mA
VOL
7.2
—
—
3.0
V
Output Impedance, Active Guard
Pin 14
Pin 16
Lo–Z
Hi–Z
9.0
9.0
—
—
—
—
10
1000
kΩ
Operating Current (Rbias = 8.2 MΩ)
IDD
9.0
12.0
—
—
5.0
—
9.0
12.0
µA
Input Current — Detect (40% R.H.)
Iin
9.0
—
—
Input Current, Pin 8
Iin
9.0
—
—
Input Current @ 50°C, Pin 15
Iin
—
—
Internal Set Voltage
Low Battery
Sensitivity
Vlow
Vset
9.0
—
Hysteresis
vhys
Offset Voltage (measured at Vin = VDD/2)
Active Guard
Detect Comparator
VOS
Freescale Semiconductor, Inc...
Characteristic
*
*
VOL
V
V
µA
—
"1.0
"0.1
"6.0
7.2
47
—
50
7.8
53
V
%VDD
9.0
75
100
150
mV
—
—
—
—
"100
"50
mV
9.0
9.0
*10
pA
Input Voltage Range, Pin 8
Vin
—
—
VDD + 10
V
Input Capacitance
Cin
—
—
5.0
—
pF
Common Mode Voltage Range, Pin 15
Vcm
—
0.6
—
I/O Current, Pin 2
Input, VIH = VDD 2
Output, VOH = VDD 2
IIH
IOH
—
—
*4.0
25
—
—
*
*
VSS
pA
VDD
*2
100
*16
V
µA
mA
# Data labelled “Typ’’ is not to be used for design purposes but is intended as an indication of the IC’s potential performance.
2
For More Information On This Product,
Go to: www.freescale.com
Motorola Sensor Device Data
Freescale Semiconductor, Inc.
MC145018
TIMING PARAMETERS (C = 0.1 µF, Rbias = 8.2 MΩ, VDD = 9.0 V, TA = 25°C, See Figure 6)
Characteristics
Oscillator Period
Symbol
Min
Max
Units
tCI
1.46
37.5
1.85
45.8
s
ms
No Smoke
Smoke
Freescale Semiconductor, Inc...
Oscillator Rise Time
tr
10.1
12.3
ms
Horn Output
(During Smoke)
On Time
Off Time
PWon
PWoff
450
450
550
550
ms
ms
LED Output
Pulses
Between
On Time
tLED
PWon
35.0
10.1
44.5
12.3
s
ms
Horn Output
(During Low Battery)
Pulses
On Time
Between
ton
toff
10.1
35.0
12.3
44.5
ms
s
TO OTHER UNITS
VDD
VDD
I/O
2
FEEDBACK
8
45 K
LOW BATTERY
COMPARATOR
+
LOW V SET 3
–
10
DETECT 1
COMP. OUT
280 K
SENSITIVITY 13
SET
BRASS
+
–
4
SILVER
ALARM
LOGIC
DETECT
COMPARATOR
325 K
STROBE OUT
11
15
GUARD
AMP
+
–
POWER–ON
RESET
DETECT
INPUT
LO–Z
VDD
14
HI–Z
16
OSC
AND
TIMING
5
LED
VDD = PIN 6
VSS = PIN 9
12
7
VDD
Figure 1. Block Diagram
Motorola Sensor Device Data
For More Information On This Product,
Go to: www.freescale.com
3
Freescale Semiconductor, Inc.
MC145018
100.0
10.0
TA = 25°C
TA = 25°C
ID , DRAIN CURRENT (mA)
ID , DRAIN CURRENT (mA)
VDD = 9.0 Vdc
10.0
VDD = 7.2 Vdc
1.0
0.1
VDD = 9.0 Vdc or 7.2 Vdc
1.0
0.1
P–CH SOURCE
AND N–CH
SINK CURRENT
0.01
0
1
2
3
4
5
6
7
8
9
10
0
1
2
3
4
5
6
8
9
10
9
10
Figure 3. Typical Comparator Output
I–V Characteristic
1000.0
1000.0
TA = 25°C
ID , DRAIN CURRENT (mA)
TA = 25°C
VDD = 9.0 Vdc
100.0
VDD = 9.0 Vdc
100.0
VDD = 7.2 Vdc
10.0
VDD = 7.2 Vdc
10.0
P–CH SOURCE CURRENT
1.0
0
7
VDS, DRAIN TO SOURCE VOLTAGE (Vdc)
Figure 2. Typical LED Output
I–V Characteristic
ID , DRAIN CURRENT (mA)
Freescale Semiconductor, Inc...
VDS, DRAIN TO SOURCE VOLTAGE (Vdc)
1
2
3
4
5
6
7
VDS, DRAIN TO SOURCE VOLTAGE (Vdc)
N–CH SINK CURRENT
8
9
10
1.0
0
1
2
3
4
5
6
7
8
VDS, DRAIN TO SOURCE VOLTAGE (Vdc)
Figure 4. Typical P Horn Driver Output
I–V Characteristic
4
For More Information On This Product,
Go to: www.freescale.com
Motorola Sensor Device Data
Freescale Semiconductor, Inc.
MC145018
DEVICE OPERATION
Freescale Semiconductor, Inc...
TIMING
The internal oscillator of the MC145018 operates with a
period of 1.65 seconds during no–smoke conditions. Each
1.65 seconds, internal power is applied to the entire IC and a
check is made for smoke, except during LED pulse, Low Battery Alarm Chirp, or Horn Modulation (in smoke). Every 24
clock cycles a check is made for low battery by comparing
VDD to an internal zener voltage. Since very small currents
are used in the oscillator, the oscillator capacitor should be of
a low leakage type.
DETECT CIRCUITRY
If smoke is detected, the oscillator period becomes
41.67 ms and the piezoelectric horn oscillator circuit is
enabled. The horn output is modulated 500 ms on, 500 ms
off. During the off time, smoke is again checked and will
inhibit further horn output if no smoke is sensed. During local
smoke conditions the low battery alarm is inhibited, but the
LED pulses at a 1.0 Hz rate. In remote smoke, the LED is
inhibited as well.
An active guard is provided on both pins adjacent to the
detect input. The voltage at these pins will be within 100 mV
of the input signal. This will keep surface leakage currents to
a minimum and provide a method of measuring the input voltage without loading the ionization chamber. The active guard
op amp is not power strobed and thus gives constant protection from surface leakage currents. Pin 15 (the Detect input)
has internal diode protection against static damage.
INTERCONNECT
The I/O (Pin 2), in combination with VSS, is used to interconnect up to 40 remote units for common signaling. A Local
Smoke condition activates a current limited output driver,
thereby signaling Remote Smoke to interconnected units. A
small current sink improves noise immunity during non–
smoke conditions. Remote units at lower voltages do not
draw excessive current from a sending unit at a higher voltage. The I/O is disabled for three oscillator cycles after power
up, to eliminate false alarming of remote units when the battery is changed.
SENSITIVITY/LOW BATTERY THRESHOLDS
Both the sensitivity threshold and the low battery voltage
levels are set internally by a common voltage divider (see
Figure 1) connected between VDD and VSS. These voltages
can be altered by external resistors connected from pins 3 or
13 to either VDD or VSS. There will be a slight interaction here
due to the common voltage divider network. The sensitivity
threshold can also be set by adjusting the smoke chamber
ionization source.
TEST MODE
Since the internal op amps and comparators are power
strobed, adjustments for sensitivity or low battery level could
be difficult and/or time–consuming. By forcing Pin 12 to VSS,
the power strobing is bypassed and the output, Pin 1,
constantly shows smoke/no smoke. Pin 1 = VDD for smoke.
In this mode and during the 10 ms power strobe, chip current
rises to approximately 50 µA.
LED PULSE
The 9–volt battery level is checked every 40 seconds during the LED pulse. The battery is loaded via a 10 mA pulse
for 11.6 ms. If the LED is not used, it should be replaced with
an equivalent resistor such that the battery loading remains
at 10 mA.
HYSTERESIS
When smoke is detected, the resistor/divider network that
sets sensitivity is altered to increase sensitivity. This yields
approximately 100 mV of hysteresis and reduces false
triggering.
1M
1
1M
TEST
16
MC145018
TO
OTHER
UNITS
330 Ω
0.1 µF
+
2
15
3
14
4
13
5
12
6
11
7
10
8
9
0.1 µF
8.2 MΩ
9V
1.5 MΩ*
0.001 µF
*NOTE: Component values may
change depending on type of
piezoelectric horn used.
220 kΩ*
Figure 5. Typical Application as Ionization Smoke Detector
Motorola Sensor Device Data
For More Information On This Product,
Go to: www.freescale.com
5
Freescale Semiconductor, Inc.
MC145018
OSC
PIN 12
1
2
3
4
5
6
7
8
9
23
24 1
6
12
18
24
SMOKE – N
–Y
SMOKE – N
–Y
NO SMOKE, LOW BATTERY
LATCH ALARM CONDITION
%([100 mV LEVEL SHIFT)
HYST
PIN 13
Freescale Semiconductor, Inc...
NO SMK
SMOKE
NO SMK
NO LOW BAT
LOW BAT – Y
–N
HORN – ON
– OFF
OSC
PIN 12
LOW BATTERY CHIRP
&
LED – OFF
– ON
NFPA MOD
&
LOW BAT – Y
–N
(NOTE 1)
HORN – ON
– OFF
LED – OFF
– ON
24 CLOCKS
24 CLOCKS
Figure 6. MC145018 Timing Diagram
NOTES:
1. Horn modulation is self–completing. When going from smoke to no smoke, the alarm condition will terminate only when horn is off.
2. Comparators are strobed once per cycle (1.65 sec for no smoke, 40 msec for smoke).
3. For timing under remote conditions, refer to MC14468 data sheet.
NFPA72: TEMPORAL HORN
MODULATION PATTERN
0.5 SEC
0.5 SEC
0.5 SEC
0.5 SEC
0.5 SEC
1.5 SEC
83 msec
167 msec
TRADITIONAL 4/6 HORN
MODULATION PATTERN
Figure 7. Horn Modulation
6
For More Information On This Product,
Go to: www.freescale.com
Motorola Sensor Device Data
Freescale Semiconductor, Inc.
MC145018
PACKAGE DIMENSIONS
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.
5. ROUNDED CORNERS OPTIONAL.
–A–
16
9
1
8
DIM
A
B
C
D
F
G
H
J
K
L
M
S
B
F
C
L
S
–T–
K
H
Freescale Semiconductor, Inc...
SEATING
PLANE
G
D
J
16 PL
0.25 (0.010)
M
T A
M
CASE 648–08
ISSUE R
Motorola Sensor Device Data
M
STYLE 1:
PIN 1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
For More Information On This Product,
Go to: www.freescale.com
INCHES
MIN
MAX
0.740
0.770
0.250
0.270
0.145
0.175
0.015
0.021
0.040
0.70
0.100 BSC
0.050 BSC
0.008
0.015
0.110
0.130
0.295
0.305
0_
10 _
0.020
0.040
CATHODE
CATHODE
CATHODE
CATHODE
CATHODE
CATHODE
CATHODE
CATHODE
ANODE
ANODE
ANODE
ANODE
ANODE
ANODE
ANODE
ANODE
MILLIMETERS
MIN
MAX
18.80
19.55
6.35
6.85
3.69
4.44
0.39
0.53
1.02
1.77
2.54 BSC
1.27 BSC
0.21
0.38
2.80
3.30
7.50
7.74
0_
10 _
0.51
1.01
STYLE 2:
PIN 1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
COMMON DRAIN
COMMON DRAIN
COMMON DRAIN
COMMON DRAIN
COMMON DRAIN
COMMON DRAIN
COMMON DRAIN
COMMON DRAIN
GATE
SOURCE
GATE
SOURCE
GATE
SOURCE
GATE
SOURCE
7
Freescale Semiconductor, Inc...
MC145018
Freescale Semiconductor, Inc.
Mfax is a trademark of Motorola, Inc.
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or
guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application
or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages.
“Typical” parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual
performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s
technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed,
intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support
or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death
may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and
hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses,
and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or
unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and
are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.
How to reach us:
USA/EUROPE/Locations Not Listed: Motorola Literature Distribution; P.O. Box 5405, Denver, Colorado 80217.
1–303–675–2140 or 1–800–441–2447
JAPAN: Motorola Japan Ltd.; SPS, Technical Information Center, 3–20–1, Minami–Azabu. Minato–ku, Tokyo 106–8573 Japan.
81–3–3440–3569
ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Centre, 2 Dai King Street, Tai Po Industrial Estate, Tai Po,
N.T., Hong Kong. 852–26668334
Customer Focus Center: 1–800–521–6274
Mfax: [email protected]
– TOUCHTONE 1–602–244–6609
Motorola Fax Back System
– US & Canada ONLY 1–800–774–1848
– http://sps.motorola.com/mfax/
HOME PAGE: http://motorola.com/sps/
8
◊
For More Information On This Product,
Go to: www.freescale.com
Motorola Sensor Device Data
MC145018/D