a5358 Allegro MicroSystems, Inc., a5358 Datasheet
a5358
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a5358 Summary of contents
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... Chamber sensitivity is periodically monitored and two consecutive cycles of degraded sensitivity are required for a warning signal (chirp) to occur. The A5358 is supplied in a 16-pin dual in-line plastic package (suffix A), and for surface mount, a 16-pin SOICW (suffix LW). The lead (Pb) free versions (suffix –T) have 100% matte- tin leadframe plating. The devices are rated for continuous operation over the temperature range of – ...
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... A5358 Selection Guide Part Number Pb-free A5358CA – A5358CA-T Yes A5358CLWTR-T Yes Absolute Maximum Ratings* Characteristic Supply Voltage Range Input Voltage Range Input Current Operating Ambient Temperature Range Maximum Junction Temperature Storage Temperature Range *CAUTION: CMOS devices have input static protection but are susceptible to damage if exposed to extremely high static electrical charges. ...
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... A5358 +Supply VDD Band-gap Reference Low Battery DETECT C1 C2 STROBE VDD IRED Photoelectric Smoke Detector with Interconnect and Timer Functional Block Diagram I/O VDD Logic Photoamp + _ Oscillator and Timing HUSH TEST FEEDBACK HORN2 HORN1 LED Power-On Reset TIMING RES OSC CAP VSS – ...
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... A5358 DC ELECTRICAL CHARACTERISTICS Characteristic Symbol Supply Voltage Range V DD Operating Supply Current I DD Low-Level Input Voltage V IL High-Level Input Voltage V IH Input Leakage High I IH Input Leakage Low I IL Input Pull-Down Current I IN Low-Level Output Voltage V OL High-Level Output Voltage V OH ...
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... A5358 DC ELECTRICAL CHARACTERISTICS (continued) Characteristic Symbol Line Regulation ΔV IRED(ΔVDD) IRED Temperature Coefficient α IRED High-Level Output Current I OH OFF Leakage Current High I OZ OFF Leakage Current Low I OZ Low-Battery Alarm Threshold V DD(th) Common Mode Voltage V IC Smoke Comparator V REF Reference Voltage Limits over the operating temperature range are based on characterization data. Characteristics are production tested at 25° ...
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... A5358 AC ELECTRICAL CHARACTERISTICS (continued) Characteristic Symbol t ired1 t ired2 t ired3 IRED Pulse Period t ired4 t ired5 t ired6 IRED Pulse Width t w(ired) IRED Rise Time t r(ired) IRED Fall Time t f(ired) I/O to Active Delay t d(io) Rising Edge on I/O to Alarm t r(io) Horn Warning Pulse Period t horn Horn Warning Pulse Width ...
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... A5358 C1 Pin A capacitor connected to this pin determines the gain, A the photoamplifier during the push-to-test mode and during the chamber monitor test. A typical capacitor value for this high- gain (supervisory) mode is 0.047 μF, but it should be selected based on the photochamber background reflections reaching the detector and the desired level of sensitivity ...
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... A5358 OSC CAP (Oscillator Capacitor) Pin A capacitor between this pin and VDD, along with a parallel resistor, forms part of a two-terminal oscillator and sets the inter- nal clock low time. With component values shown, this nominal time is 10.4 ms and essentially the oscillator period. The internal ...
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... A5358 increased to one pulse every OSC CAP cycle and the STROBE pin is always active. To exit this mode, the TEST pin should be floated, or returned for at least one OSC CAP cycle. SS Alarm Indications Alarm conditions include: local smoke detection, a remote alarm, low battery, or degraded chamber sensitivity. These are indicated by a combination of horn and LED signals, which continue until the alarm condition is resolved ...
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... A5358 Standby Mode OSC CAP Pin Internal Clock Photo Sample Low-Battery Test Chamber Test t w(st) STROBE Pin IRED Pin LED Pin Low Battery Condition VDD Pin Low-Battery Test Failed “test period” Horn Enable LED Pin Chirps occur at the end of a failed “test period,” and are nearly coincident with LED flashes ...
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... A5358 Local Smoke Detection Alarm Condition 1st strobe with smoke IRED Pin t st2,ired2 STROBE Pin t w(led) LED Pin Horn Enable I/O Pin Remote Alarm Condition STROBE Pin LED Pin t on(horn) Horn Enable t r(io) I/O Pin Test Alarm Mode STROBE Pin t w(st) LED Pin t w(led) TEST Pin ...
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... A5358 .005 [1.27] All dimensions nominal, not for tooling use Dimensions in millimeters (reference JEDEC MS-013 AA) Dimensions exclusive of mold flash, gate burrs, and dambar protrusions Exact case and lead configuration at supplier discretion within limits shown A Terminal #1 mark area Photoelectric Smoke Detector with Interconnect and Timer Package A, 16-Pin DIP ...
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... A5358 Allegro MicroSystems offers an industry-leading range of ionization and photoelectric smoke detector ICs. For a current listing, please visit our website at: Copyright ©2001-2007, Allegro MicroSystems, Inc. The products described herein are manufactured under one or more of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283; 5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719; 5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents pending. ...