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MFG:MC/TC/CD D/C:DIP
Part Number: MC14568
MFG: MC/TC/CD
D/C: DIP
Description: The MC14568, when used with an ionization chamber and a small number of external components, will dete...
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MC14568
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DataSheet
General Description
MC14568 General Description
The MC14568, 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.
An internal oscillator with associated logic controls the overall functionality by powering down the device for 1.67 seconds and sensing smoke in a 10 ms window. In this way, standby current consumption is reduced to between 5.0 and 9.0 µA, thus providing longer battery life. In addition, a networking capability allows as many as 125 to be interconnected so that if any unit senses smoke, all units will sound an alarm.
The MC14568 is supplied in a 16-pin dual in-line plastic package and is designed to run on a power supply between 6 to 12 Volts.
MC14568 Maximum Ratings
|
Rating |
Symbol |
Value |
Unit |
| Supply Voltage Range |
VDD |
-0.5 to +15 |
V |
| Input Voltage Range |
VIN |
-0.3 to VDD +0.3 |
V |
| Maximum Current (Source/Sink) by Pins 6 (VDD) and Pin 9 (VSS) |
IDS |
30 |
mA |
| Maximum Current Input Pins |
IIN |
±10 |
mA |
| Maximum Current Output Pins (Pins 2, 4, 5, 10, 11) |
- |
±25 |
mA |
| Maximum Current (Pin 15) |
- |
±1.0 |
mA |
| Operating Temperature Range |
TA |
0 to +50 |
°C |
| Storage Temperature Range |
TSTG |
-55 to +125 |
°C |
| Human Body Model ESD Rating |
VESD |
1000 |
V |
MC14568 Features
• Speed-Up Sampling Rate of 40 ms of Internal Clock Period (Pin 12) After First Detection of Smoke
• Timer Function for Reduced Sensitivity for a Nominal Period of 6.43 Minutes (10 Minutes Max)
• High-Smoke Detection in the "Reduced Sensitivity" Mode
• Internal and External Low Battery Threshold
• Internal and External Smoke Reference Settings
• Guaranteed Power Up Without Random LED and Horn Chirps
• Reversed Battery Protection
• Low Leakage Detect Pin
• Metal Option to Add Double Chirp at End of Reduced Sensitivity Period; Default is No Chirp
• Pb-Free Packaging Designated by Suffix Code ED
• Timer Function for Reduced Sensitivity for a Nominal Period of 6.43 Minutes (10 Minutes Max)
• High-Smoke Detection in the "Reduced Sensitivity" Mode
• Internal and External Low Battery Threshold
• Internal and External Smoke Reference Settings
• Guaranteed Power Up Without Random LED and Horn Chirps
• Reversed Battery Protection
• Low Leakage Detect Pin
• Metal Option to Add Double Chirp at End of Reduced Sensitivity Period; Default is No Chirp
• Pb-Free Packaging Designated by Suffix Code ED
MC14568 Connection Diagram
MC14568B
PDF/DataSheet Download
- Datasheet: MC14568B
- File Size: 330846 KB
- Manufacturer:
- Click here to Download
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