A5358CA

Series: -
Function: -
Sensor Type: -
Sensing Temperature: -
Accuracy: -
Topology: -
Output Alarm: -
Output Fan: -
Voltage - Supply: -
Operating Temperature: -
Mounting Type: Through Hole
Packaging: Tube
Output Type: Voltage
Type: Smoke Detector
Interface: -
Package / Case: 16-DIP (0.300", 7.62mm)
Input Type: Photoelectric
Manufacturer: Allegro Microsystems Inc
Current - Supply: 12µA
Supplier Device Package: 16-DIP


Features:

·Interconnect Up to 50 Detectors
·Piezoelectric Horn Driver
·All Internal Low-Battery Detection
·Power-ON Reset
·Internal Timer & Control for Reduced Sensitivity
·Built-In Circuits to Reduce False Triggering
·6 V to 12 V Operating Voltage Range
·ESD-Protection Circuitry on All Pins


Pinout




Specifications

Supply Voltage Range,
V_DD ...................................... -0.5 V to +15 V
Input Voltage Range,
V_IN .............................. -0.3 V to V_DD + 0.3 V
Input Current, I_IN ............................... 10 mA
Operating Temperature Range,
T_A ..................................... -25°C to +75°C
Storage Temperature Range,
T_S ................................... -55°C to +125°C
CAUTION: CMOS devices have input static protection but are susceptible to damage if exposed to extremely high static electrical charges.


Description

The A5358CA is a low-current BiCMOS circuit providing all of the required features for a photoelectric type smoke detector. This device can be used in conjunction with an infrared photoelectric chamber to sense scattered light from smoke particles. Special features are incorporated in the design to facilitate calibration and testing of the finished detector. The device is designed to comply with Underwriters Laboratories Specification UL217 and British Standard BS 5446, Part 1.

A variable-gain photo amplifier can be directly interfaced to an infrared emitter/detector pair. The amplifier gain levels are determined by two external capacitors that are then internally selected depending on the operating mode. Low gain is selected during standby and timer modes. During a local alarm this low gain is increased (internally) by ~10% to reduce false triggering. High gain is used during the pushbutton test and during standby to periodically monitor the chamber sensitivity.

The internal oscillator and timing circuitry keeps standby power to a minimum by sensing for smoke every 10 seconds in a 10 s window. A special three-stage speedup sensing scheme is incorporated to minimize the time to an audible alarm and also to reduce false triggering. Also, two consecutive cycles of degraded chamber sensitivity are required for a warning signal to occur.

The A5358CA is supplied in a low-cost 16-pin dual in-line plastic package. It is rated for continuous operation over the temperature range of -25°C to +75°C. The Pb (lead) free version has 100% matte tin leadframe plating.

Parameters:

Technical/Catalog Information	A5358CA
Vendor	Allegro Microsystems Inc
Category	Integrated Circuits (ICs)
Package / Case	16-DIP
Packaging	Tube
Type	Smoke Detector
Interface	CMOS
Supply Voltage	6 V ~ 12 V
Current - Supply	12mA
Input Type	Voltage
Output Type	Voltage
Lead Free Status	Contains Lead
RoHS Status	RoHS Non-Compliant
Other Names	A5358CA A5358CA