HT7501

HT7501 Clinical Thermometer Features Single-chip CMOS construction Single 1.5V battery operation Measurement range: +32.00°C~+43.00°C Measurement accuracy: ±0.1°C Resolution: 0.01°C Auto self-test Alarm warning for fever Highest temperature hold Auto power off after 8 min 40 sec One-key input switch for ON/OFF Displays last time measured temperature General Description The HT7501 is a CMOS digital clinical thermometer IC for measuring body temperature from 32.00°C~43.00°C. It also provides alarm, self-test, auto power off and last time measured temperature functions. The other electronic components are LCD display, thermister, 1.5V battery, ON/OFF switch, buzzer, resistors and capacitors. Block Diagram 1 8th Feb ’99 HT7501 Pad Assignment Chip size: 121 × 124 (mil)2 * The IC substrate should be connected to VDD in the PCB layout artwork. Pad Coordinates Pad No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 X –54.78 –54.78 –54.78 –54.78 –54.78 –54.78 –54.78 –54.78 –54.78 –54.78 –52.53 –44.46 –37.10 –29.88 –22.82 –5.31 5.40 13.64 Y 54.10 46.45 39.10 31.45 24.10 16.45 9.10 1.45 –5.91 –13.56 –56.53 –56.53 –56.53 –56.53 –56.53 –56.53 –56.53 –56.53 2 Unit: mil Pad No. 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 X 20.27 54.78 54.78 54.78 54.78 54.78 54.02 54.02 54.02 51.13 44.50 37.87 31.24 18.02 1.95 –17.34 –23.97 –40.97 Y –56.53 –56.53 –49.30 –37.99 –25.58 –1.02 8.50 15.13 27.11 55.85 55.85 55.85 55.85 56.61 56.61 56.61 56.61 56.61 8th Feb ...