sts the low-battery threshold B In standby, BLINK = VDD causes LED to blink, BLINK = V SS causes LED not to blink Photoelectric Smoke Detector with Interconnect, Timer, and Latching Alarm Indicator A5303 Selection Guide Part Number A5303SESTR-T A5303SLE-T A5303SLETR-T Pb-free and RoHS Yes Yes Yes Package 20-contact QFN 20-pin TSSOP (JEDEC MO-153AC) 20-pin TSSOP (JEDEC MO-153AC) Packing 1500 pieces / 7-in. reel 75 pieces / tube 4000 pieces / reel Absolute Maximum Ratings Characteristic Symbol Notes Rating Units -2.3 to 6 V Supply Voltage Range VDD Referenced to VSS DC Input Voltage Range VIN Referenced to VSS -0.3 to 6 V Operating Ambient Temperature Range TA Allegro Range S -20 to 85 C TJ(max) 150 C Tstg -55 to 150 C Maximum Junction Temperature Storage Temperature Range Thermal Characteristics Characteristic Symbol Package Thermal Resistance Test Conditions* RJA Value Units ES Package, 4-layer PCB, based on JEDEC standard 37 C/W LE Package, estimated, single-layer PCB, minimal exposed copper are

D or VSS adjusts the low-battery threshold B In standby, BLINK = VDD causes LED to blink, BLINK = V SS causes LED not to blink Photoelectric Smoke Detector with Interconnect, Timer, and Latching Alarm Indicator A5303 Selection Guide Part Number A5303SLE-T A5303SLETR-T Pb-free and RoHS Yes Yes Package 20-pin TSSOP (JEDEC MO-153AC) 20-pin TSSOP (JEDEC MO-153AC) Packing 75 pieces / tube 4000 pieces / reel Absolute Maximum Ratings Characteristic Symbol Notes Rating Units -2.3 to 6 V Supply Voltage Range VDD Referenced to VSS DC Input Voltage Range VIN Referenced to VSS -0.3 to 6 V Operating Ambient Temperature Range TA Allegro Range S -20 to 85 C TJ(max) 150 C Tstg -55 to 150 C Maximum Junction Temperature Storage Temperature Range Thermal Characteristics Characteristic Symbol Package Thermal Resistance RJA Test Conditions* Estimated, single-layer PCB, minimal exposed copper area Value Units 127 C/W *Additional thermal information available on Allegro website. Terminal List Pin-out Diagram SOUT1 1 20