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MC145010ED

P1-P3P4-P6P7-P9P10-P12
MC145010
Rev 7.0, 05/2006
Freescale Semiconductor
Technical Data
© Freescale Semiconductor, Inc., 2006. All rights reserved.
Photoelectric Smoke
Detector IC with I/O
The CMOS MC145010 is an advanced smoke detector component containing
sophisticated very-low-power analog and digital circuitry. The IC is used with an
infrared photoelectric chamber. Detection is accomplished by sensing scattered
light from minute smoke particles or other aerosols. When detection occurs, a
pulsating alarm is sounded via on-chip push-pull drivers and an external
piezoelectric transducer.
The variable-gain photo amplifier allows direct interface to IR detectors
(photodiodes). Two external capacitors, C1 and C2, C1 being the larger, determine
the gain settings. Low gain is selected by the IC during most of the standby state.
Medium gain is selected during a local-smoke condition. High gain is used during
push button test. During standby, the special monitor circuit which periodically
checks for degraded chamber sensitivity uses high gain, also.
The I/O pin, in combination with V
SS
, can be used to interconnect up to 40 units
for common signaling. An on-chip current sink provides noise immunity when the I/
O is an input. A local-smoke condition activates the short-circuit-protected I/O
driver, thereby signaling remote smoke to the interconnected units. Additionally, the
I/O pin can be used to activate escape lights, enable auxiliary or remote alarms,
and/or initiate auto-dialers.
While in standby, the low-supply detection circuitry conducts periodic checks
using a pulsed load current from the LED pin. The trip point is set using two external
resistors. The supply for the MC145010 can be a 9 V battery.
A visible LED flash accompanying a pulsating audible alarm indicates a local-
smoke condition. A pulsating audible alarm with no LED flash indicates a remote-
smoke condition. A beep or chirp occurring virtually simultaneously with an LED
flash indicates a low-supply condition. A beep occurring half-way between LED
flashes indicates degraded chamber sensitivity. A low-supply condition does not
affect the smoke detection capability if V
DD
≥ 6 V. Therefore, the low-supply
condition and degraded chamber sensitivity can be further distinguished by
performing a push button (chamber) test.
Features
• Circuit is designed to operate in smoke detector systems that comply with
UL217 and UL268 Specifications
• Operating Voltage Range: 6 to 12 V
• Operating Temperature Range: - 10 to 60°C
• Average Supply Current: 12 µA
• Power-On Reset Places IC in Standby Mode (Non-Alarm State)
• Electrostatic Discharge (ESD) and Latch Up Protection Circuitry on All Pins
• Chip Complexity: 2000 FETs, 12 NPNs, 16 Resistors, and 10 Capacitors
• Ideal for battery powered applications.
ORDERING INFORMATION
Device Temp. Range Case No. Package
MC145010P
-55 to +125°C
648-08 16 Lead Plastic Dip
MC145010ED
MC145010DW
751G-04 16 Lead SOICW
MCZ145010EG/EGR2
MC145010
PHOTOELECTRIC SMOKE
DETECTOR IC WITH I/O
P SUFFIX
ED SUFFIX (PB-FREE)
PLASTIC DIP
CASE 648-08
DW SUFFIX
EG SUFFIX (PB-FREE)
SOICW
CASE 751G-04
Figure 1. Pin Connections
C1
C2
Detect
Strobe
V
DD
IRED
I/O
Brass
Test
Low-Supply
Trip
V
SS
R1
OSC
LED
Feedback
Silver
1
2
3
4
5
7
6
89
10
11
12
13
14
15
16
Sensors
2 Freescale Semiconductor
MC145010
Figure 2. Block Diagram
Table 1. Maximum Ratings
(1)
(Voltages referenced to V
SS
)
1. Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the limits
in the Electrical Characteristics tables.
Rating Symbol Value Unit
DC Supply Voltage V
DD
-0.5 to +15 V
DC Input Voltage
C1, C2, Detect
OSC, Low-Supply Trip
I/O
Feedback
Test
V
IN
-0.25 to V
DD
+0.25
-0.25 to V
DD
+0.25
-0.25 to V
DD
+10
-15 to +25
-1.0 to V
DD
+0.25
V
DC Input Current per Pin I
IN
±10 mA
DC Output Current per Pin I
OUT
±25 mA
DC Supply Current, VDD and VSS Pins I
DD
+25 / -150 mA
Power Dissipation in Still Air
5 Seconds
Continuous
P
D
1200
(2)
350
(3)
2. Derating: -12 mW/°C from 25° to 60°C.
3. Derating -3.5 mW/°C from 25° to 60°C.
This device contains circuitry to protect the inputs against damage due to high static voltages or electric fields; however, it is advised 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 V
IN
and V
OUT
be constrained to the range V
SS
≤ (V
IN
or V
OUT
) ≤ V
DD
.
mW
Storage Temperature Range T
STG
-55 to +125 °C
Lead Temperature, 1 mm From Case for 10 Seconds T
L
5.0 °C
+
-
+
-
Detect
OSC
R1
Test
Strobe
Low-supply
Trip
3
12
13
16
4
15
21
C1 C2
AMP
Comp
Comp
Alarm
Logic
Horn Modulator
And Driver
V
DD
- 5.0
VREF
Timing
Logic
V
DD
- 3.5 V
REF
Zero
Gain
Low Supply
Smoke
Gate
On/off
On/off
8
9
10
6
11
7
PIN 5 = V
DD
PIN 14 = V
SS
IRED
Feedback
Silver
Brass
I/O
Gate
OSC
LED
Sensors
Freescale Semiconductor 3
MC145010
Table 2. Electrical Characteristics
(T
A
= -10 to 60°C unless otherwise indicated. Voltages referenced to V
SS
.)
Characteristics Symbol
V
DD
/V
DC
Min Typ Max Unit
Operating Voltage V
DD
— 6.0 — 12.0 V
Supply Threshold voltage, Low-Supply Alarm
Low-Supply Trip: VIN = VDD/3
V
TH
— 6.5 — 7.8
V
Average Operating Supply Current (per Package)
Standby Configured per Figure 8
I
DD
12.0 — — 12.0 µA
Peak Supply Current (per Package)
During Strobe ON, IRED OFF Configured per Figure 8
During Strobe ON, IRED ON Configured per Figure 8
i
DD
12.0
12.0
—
—
—
—
2.0
3.0
mA
Low-Level Input Voltage
I/O
Feedback
Test
V
IL
9.0
9.0
9.0
—
—
—
—
—
—
1.5
2.7
7.0
V
High-Level Input Voltage
I/O
Feedback
Test
V
IH
9.0
9.0
9.0
3.2
6.3
8.5
—
—
—
—
—
—
V
Input Current
OSC, Detect – V
IN
= V
SS
or V
DD
Low-Supply Trip – V
IN
= V
SS
or V
DD
Feedback – V
IN
= V
SS
or V
DD
I
IN
12.0
12.0
12.0
—
—
—
—
—
—
±100
±100
±100
nA
Low -Level Input Current
Test – V
IN
= V
SS
or V
DD
I
IL
12.0 — — -1.0 µA
Pull-Down Current
Test – V
IN
= V
DD
I/O – No Local Smoke, V
IN
= V
DD
I/O – No Local Smoke, V
IN
= 17 V
I
IH
9.0
9.0
12.0
0.5
25.0
—
—
—
—
10
100
140
µA
Low-Level Output Voltage
LED – I
OUT
= 10 mA
Silver, Brass – I
OUT
= 16 mA
V
OL
6.5
6.5
—
—
—
—
0.6
1.0
V
High-Level Output Voltage
Silver, Brass – I
OUT
= 16 mA
V
OH
6.5 5.5 — —
V
Output Voltage (For Line Regulations, See Pin Descriptions)
Strobe – Inactive, I
OUT
= -1 µA
Active, I
OUT
=
100
µA to 500 µA (Load Regulation)
IRED – Inactive, I
OUT
= 1 µA
Active, I
OUT
= 6
µA (Load Regulation)
V
OUT
—
9.0
—
9.0
V
DD
– 0.1
V
DD
– 4.40
—
2.25
(1)
1. T
A
= 25°C only.
—
V
DD
– 5.30
0.1
3.75
1
V
High-Level Output Current
I/O – Local Smoke, V
OUT
= 4.5 V
I/O – Local Smoke, V
OUT
= V
SS
(Short Circuit Current)
I
OH
6.5
12.0
-4
—
—
-16
mA
Off-State Output Leakage Current
LED – V
OUT
= V
SS
or V
DD
I
OZ
12.0 — — ±1.0
ΧA
Common Mode
C1, C2, Detect, Voltage Range – Local Smoke, Push Button
Test, or Chamber Sensitivity Test
V
IC
— V
DD
– 4 — V
DD
– 2
V
Smoke Comparator
Internal Reference Voltage – Local Smoke, Push Button
Test, or Chamber Sensitivity Test
V
REF
— V
DD
– 3.08 — V
DD
– 3.92
V
P1-P3P4-P6P7-P9P10-P12

MC145010ED

Mfr. #:
Buy MC145010ED
Manufacturer:
NXP Semiconductors
Description:
IC SMOKE DETECT PHOTOELEC 16-DIP
Lifecycle:
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