Networked Smoke Detector Master : HT68F50 + HT71D02(3.3V) / 04(5V) Slave : HT45F23 + HT71D02(3.3V) / 04(5V) Characteristics Power Line Data Transceiver Master Flash program memory High maximum input voltage : 30V Includes internal 5V regulator Supports half-duplex communication for single to multiple devices Full data transmission on power lines Supports ICP Slave Smoke detection Temperature detection Flash Program Memory Integrated operational amplifier and comparator -- reduced need for external components Non-polarised power connector Supports ICP Application Areas Wide Range of Interconnecting System Applications Application Circuit Master Circuit J1 SW1 DC-18V POW Vin F1 C5 FUSE 220uF HT71D04_8SOP U1 D1 1N4148 R1 51 4 VIN . R2 C1 C2 100K 100uF 103 LDO 3.3/5.0V Q1 VDD 5 VDD . VCC RPU1 VDLY LED1 POW_White VDD R5 C7 6.8K 510K 0.1uF 0.1uF CX J2 RES 3 CN . 2 CP/TD . R6 100 2 1 PA2 PA0 Line + RPU2 Q4 VPT CON7 Vin R7 200 VIN C9 0.1uF 10uF VOUT R8 200 15 3 LCM1 2 C10 C11 0.1uF 10uF R9 15K 1 C8 GND HT7550-1 U3 2 R10 2K U4 2 C13 22uF 4 3 C2 C2X 1 HT7660 FB/SD VCC CAP+ Q1 8050 7 OSC VO LCD MODULE D0 D1 D2 D3 VSS BK2(-) R16 5 VOUT C14 22uF 11 12 13 14 4 5 6 6 5 4 3 11 10 9 7 8 9 10 25 24 23 22 21 20 19 16 15 5.6K S2 SW S3 SW 18 PB1/OSC1 PC4/[PINT] PB2/OSC2 PB3/XT1 PC5/TP0_1/PCK/[INT1] PB4/XT2 PC7/[SCK/SCL]/SCOM3 PC0/[SDI/SDA]/SCOM0 VDD PC1/[SDO]/SCOM1 17 VDD 7 R11 100K PA4/INT1/TCK1 PA5/C1X/SDO PA6/SDI/SDA PA7/SCK/SCL PB5/SCS PC2/PCK/C1+ PC3/PINT/C1PD0/[TCK2]/TP3_1//SCS PD1/[TP2_0]/[SDO]/[SCK/SCL] 1 28 27 26 PA0 S1 SW HT68F50_28SOP U2 D4 D5 D6 D7 RS R/W E VDD PA2 JP1 JUMPER 8 . LCM/PC1602 6 VREF CAPGND 8 TG VREF BK1(+) DOT MATRIX 3 16 1 Protection circuit 1 VSS/TS . for Programming . VDD Q3 C1 6 + J3 - 1 2 3 4 5 6 7 47uF C6 LDO 7.5/9.0V R4 C4 0.1uF CDLY 7 . Q2 R3 47 C3 8 PB0/RES R12 300 RES C12 0.1uF 2 VSS PA0/C0X/TP0_0 PA1/TP1A PD2/[TCK0]/[SDI/SDA] PA2/TCK0/C0+ PD3/[TCK1]/TP3_0/[SDO] PA3/INT0/C0PC6/[SCS]/SCOM2 LED2 IND LED3 Green RED R13 220 R14 330 BZ1 BUZZER Alarm R15 330 14 13 12 S4 SW Slave Circuit D1 1N4148 J1 D4 D6 1N4004 1N4004 Vin R1 51 R2 24K 2 1 HT71D04_8SOP U1 4 VIN . C3 100uF/25V LDO 3.3/5.0V VDD . VCC Q1 C4 103 VDLY D7 1N4004 1N4004 C1 0.1uF RPU1 Q2 R3 24 R4 510K C5 0.1uF LDO 7.5/9.0V C6 0.1uF CX + Q3 C1 RPU2 Protection circuit Q4 VPT C2 C2X 1 VSS/TS . VDD VDD 1 R5 10K 16 PA2 PA0 CON7 for Programming PC2/OSC3 PA0/CNP PC1/AN5/OSC2 C10 20p 20p PA2 R10 2M C11 103 D3 IRTX VDD C13 22uF C8 20P R11 2M R12 15K R14 10 C9 R13 Q1 8050 PA7/A2E 10 . . 11 . 13 . D2 IRRX PA6/A2N . PA4/A1E 14 . 15 C7 PA5/A2P 12 PA3/A1N R9 100K PB3/AN0/SCS PC0/AN4/OSC1 PA2/A1P - RES PA1/C1OUT VSS + 1 2 3 4 5 6 7 PC3/OSC4 VDD VDD R8 100K 8 VDD HT45F23_16NSOP U2 - 7 VDD . VREF + 5 6 J3 TG PB6/AN3/RES U3 NTC_10K 6 + - 2 CP/TD . . VDD - 3 CN . C2 47uF/25V CDLY 7 . Line D5 VDD 5 R15 20P 120K 1K 4 R7 10K 2 8 RES 3 PA0 9 SW1 TS1 SW2 TS1