MC145010EG Freescale Semiconductor, MC145010EG Datasheet - Page 6

• Manufacturer Part Number: MC145010EG
• Description: IC SMOKE DETECT PHOTOELEC 16SOIC
• Manufacturer: Freescale Semiconductor
• Type: Smoke Detectorr

Specifications of MC145010EG

• Input Type: Logic
• Output Type: Logic
• Current - Supply: 12µA
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Interface: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

MC145010
6
Table 4. Pin Description
Pin
16
Symbol
TEST
This input has an on-chip pull-down device and is used to manually invoke a test mode. The Push Button Test mode is
initiated by a high level at pin 16 (usually depression of a S.P.S.T. normally-open push button switch to V
oscillator cycle, IRED pulses approximately every 336 ms, regardless of the presence of smoke. Additionally, the amplifier
gain is increased by automatic selection of C1. Therefore, the background reflections in the smoke chamber may be
interpreted as smoke, generating a simulated-smoke condition. After the second IRED pulse, a successful test activates
the horn-driver and I/O circuits. The active I/O allows remote signaling for system testing. When the Push Button Test
switch is released, the Test input returns to V
gain returns to normal, thereby removing the simulated-smoke condition. After two additional IRED pulses, less than a
second, the IC exits the alarm mode and returns to standby timing.
1.04
1.02
1.00
0.98
0.96
1.03
1.02
1.01
1.00
0.99
0.98
1.02
1.01
1.00
0.99
0.98
-10
6.0
-10
(Continued)
0
0
7.0
Figure 5. RC Component Variation Overtemperature
V
V
T
10
DD
10
T
A
DD
A
Figure 4. AC Characteristics vs. Temperature
, Ambient Temperature (°C)
8.0
, Ambient Temperature (°C)
= 9.0 V
, Power Supply Voltage (V)
Figure 3. AC Characteristics vs. Supply
20
20
9.0
30
30
10.0
40
SS
40
due to the on-chip pull-down device. After one oscillator cycle, the amplifier
11.0
50
50
Description
12.0
60
60
10 MΩ Carbon composition
100 kΩ Metal Film
1500 pF Dipped MICA
Pulse width of IRED
Period or pulse width
of other parameters
Pulse width of IRED
Period or pulse width
of other parameters
Note: These components were used to generate
Figure 3.
Freescale Semiconductor
DD
). After one
Sensors