BL59S10

www.DataSheet4U.com BL59A10/BL59S10 PHOTOELECTRIC SMOKE DETECTOR IC 1. Product description 1.1. Basic function: BL59A10/BL59S10 is a CMOS LSI used for smoke detection. Ultra-low power analog and digital circuits are contained in it. Combined with an IR photoelectric chamber, this IC is used to detect smoke through receiving light scattered by tiny smoke particles going into the chamber. When smoke is detected, A burst of alarm sounds are generated by an external piezoelectric buzzer driven by the push-pull output of this IC. 1.2. Applications: Smoke detection system. 2. Features: Power supply range: Average supply current: Operating temperature range: 6V ～ 12V 12uA -10 ～ 60℃ Ideal for battery powered applications. 3. Block diagram of this IC I/O 7 COMP ALARM LOGIC 8 9 10 BRASS SILVER FEEDBACK C1 C2 1 2 DETECT 3 AMP REF1 0SC R1 12 13 TIMING LOGIC REF2 6 11 IRED LED TEST 16 STROBE LOW-SUPPLY 7 15 COMP PIN5=Vdd PIN14=Vss 4. Pin assignment C1 C2 Detect Strobe Vdd IRED I/O Brass 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 Test Low-Supply Vss R1 Osc LED Feedback Silver http://www.belling.com.cn -1- 8/28/2006 Wrote by 2006 Total 8 Pages BL59A10/BL59S10 5.Pin description Pin Symbol No. 1,2 C1, C2 Input/output Functions External capacitor connection I Detecting input By connecting external capacitor, a voltage feedback amplifier is formed. The gain of it is determined by capacitor’s value. Connect a photodiode to supply a signal to the internal comparator. A strobe voltage...