FEATURES
Two BCD inputs to select the priority Strobe to trigger the alarm Three priority encoded alarms, HIGH, MEDIUM, LOW and also a general purpose alarm. Inbuilt high performance audio power amplifier Drives 8Ω speaker directly. No other external components required Operates on single 5V supply Low standby current Simple modified polarized 28-pin DIP footprint 3. Ordering information Type number Package DESCRIPTION
Version Packing information 25 pcs. ALC109 28-pin DIPMP Hybrid carrier, 18 leads 1.9 1 Product data sheet ALC109 Apex MediTech 4. Block diagram 5. Pinning information 2 Product data sheet ALC109 Apex MediTech 6. Pin description Symbol VDD Pin 1 2-4 10-12 VSS 13 14 STROBE 15 Type Supply NC * NC * Supply NC * I DESCRIPTION
VDD No connection No connection VSS No connection Strobe to trigger the alarm set by the A, B and C inputs No connection Input B Input A 16 B A 17 18 NC * I I I = Input, O = Output, NC = No connection * No connection pins should be left unconnected 7. Logic table A 0 1 0 1 B 0 0 1 1 Priority HIGH MEDIUM LOW GENERAL 3 Product data sheet ALC109 Apex MediTech 8.
