Single-chip CMOS construction Single 1.5V battery operation Measuremen

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

Single-chip CMOS construction Single 1.5V battery operation Measuremen

Datasheet Thumbnail

Top Searches for this datasheet

HT7500 Clinical Thermometer
Single-chip CMOS construction Single 1.5V battery operation Measurement range: +32.0~+42.0°C Alarm warning fever Highest temperature hold Auto power after One-key input switch ON/OFF Displays last time measured temperature
(+90.0~+108.0°F) Measurement accuracy: ±0.1°C (±0.2°F) Resolution: 0.1°C (0.1°F)
Bonding option Centigrade/Fahrenheit measure-
ment
General Description
HT7500 CMOS digital clinical thermometer measuring body temperature Centigrade (°C) Fahrenheit (°F) mode bonding option. also provides alarm auto power functions. other electronic components display, thermister, 1.5V battery, ON/OFF switch, buzzer, resistors capacitors.
Block Diagram
Rev. 1.20
September 2007
HT7500
Assignment
substrate should connected layout artwork.
Chip size: (mil)2
Coordinates
-929.875 -885.969 -885.970 -885.970 -885.970 -929.549 -929.635 -868.914 -769.896 -670.794 -571.776 -245.230 -63.255 104.027 371.023 859.556 936.575 234.628 70.023 -46.627 -242.787 -347.652 -503.467 -617.438 -858.957 -858.957 -858.957 -858.957 -858.919 -858.919 -858.982 -858.982 -827.747 -119.962 936.575 936.575 936.575 936.575 936.575 936.575 936.575 671.959 568.970 469.260 368.401 92.064 -19.960 -226.930 -366.670 -646.030
Unit:
-16.322 109.908 213.548 339.779 443.417 569.648 673.287 859.023 859.023 859.048 859.023 859.023 859.023 859.023 859.023 859.023
Rev. 1.20
September 2007
HT7500
Description
14~16 17~19 20~22 23~25 Name LOWC TEST2 CLFH OSCI OSCO COM1~COM3 SA1~SA3 SB1~SB3 SC1~SC3 C512 TEST1 TS816 Function supply voltage detector, open when use. Negative power supply, Common point, NMOS open drain Connect reference resistor, PMOS open drain Connect sensor resistor, PMOS open drain Positive power supply Pull-low input pin, push switch turn power Pull-low test pin, production test, floating displays real time value, when connected VDD, displays highest value. Floating connect system oscillator system oscillator Buzzer output Buzzer output backplane drive, 3-level voltage segment drive segment drive segment drive segment drive Generate negative voltage (-1.5V) negative voltage, NMOS output negative voltage, inverter output Test Test Test Test
Absolute Maximum Ratings
Supply voltage.0V 2.0V Input voltage .VSS-0.5V VDD+0.5V Operation Temperature.-2.0°C +75°C Storage Temperature .-55°C +125°C
Note: These stress ratings only. Stresses exceeding range specified under Maximum cause substantial damage device. Functional operation this device other conditions beyond those listed specification implied prolonged exposure extreme conditions affect device reliability.
Rev. 1.20
September 2007
HT7500
Electrical Characteristics
Symbol ISTB fOSC Parameter Operating Voltage Operating Current Standby Current Oscillating Frequency Temperature Measurement Accuracy Range 35°C~39°C Temperature Measurement Accuracy Range 95°F~102°F Test Conditions 1.5V 1.5V 1.5V Conditions load ROSC=820kW Min. 25.6 -0.1 -0.2 Typ. Max. 1.65 38.4 Ta=25°C Unit
Electrode Pattern
COM1 COM2 COM3
Note: duty, bias (LCD uses
Function Description
Power push switch power power off. When power push switch, then will generate
sound 0.125 sec. First displays segments sec. After described above, then shows last time measured temperature sec. After shows 0.75 sec. After displays measured temperature, then mark will flash speed 1Hz. temperature 32°C 90°F), display shows °F). temperature 42°C 108°F display shows display always shows higher temperature during temperature measurement. measured temperature does change more than sec., measurement over mark flash stops.
When measurement over, temperature 37.5°C 99.5°F) buzzer alarms sec, follows:
temperature 37.5°C 99.5°F), buzzer alarms sec, follows:
will automatically turn power when
measurement over secretary.
Rev. 1.20
September 2007
HT7500
When measurement over, temperature rises within sec, mark will flash again (repeat from step 2-d), starts count again. When beep sound sec, temperature measured.
When power off: standby current 1mA. frequency buzzer 5.3kHz Bonding option Measurement degree either Sensor 503ET Reference resistor value (sensor 37.0°C) When battery voltage low, battery mark
flashes speed measurement accurate. voltage detect: 1.35V 0.05V. During process mass production, order adjust reference resistance (RF), test floating, measured temperature will actual temperature measured environment. down, always higher one.
Flow Chart
Rev. 1.20
September 2007
HT7500
Application Circuits
Note: Substrate connect VEE, CAP, C512 externally connected capacitors stabilizing (=-1.5V). connected external buzzer generate sounds. LOWC connected external resistor adjusting detector level voltage detector. Open when use. OSCI, OSCO connected external resistor, form oscillator with built-in capacitor SYSTEM clock (=32kHz) constitute alternating oscillator, which allows oscillator, namely active time. (reference resistor) resistor value equal 503ET, sensor value 37.0 98.6 SENSOR thermistor.
Rev. 1.20
September 2007
HT7500
Holtek Semiconductor Inc. (Headquarters) No.3, Creation Science Park, Hsinchu, Taiwan Tel: 886-3-563-1999 Fax: 886-3-563-1189 http://www.holtek.com.tw Holtek Semiconductor Inc. (Taipei Sales Office) 4F-2, 3-2, YuanQu St., Nankang Software Park, Taipei 115, Taiwan Tel: 886-2-2655-7070 Fax: 886-2-2655-7373 Fax: 886-2-2655-7383 (International sales hotline) Holtek Semiconductor Inc. (Shanghai Sales Office) Floor, Building No.889, Shan Rd., Shanghai, China 200233 Tel: 86-21-6485-5560 Fax: 86-21-6485-0313 http://www.holtek.com.cn Holtek Semiconductor Inc. (Shenzhen Sales Office) 5/F, Unit Productivity Building, Cross Science Road Gaoxin Road, Science Park, Nanshan District, Shenzhen, China 518057 Tel: 86-755-8616-9908, 86-755-8616-9308 Fax: 86-755-8616-9722 Holtek Semiconductor Inc. (Beijing Sales Office) Suite 1721, Jinyu Tower, A129 West Xuan Street, Xicheng District, Beijing, China 100031 Tel: 86-10-6641-0030, 86-10-6641-7751, 86-10-6641-7752 Fax: 86-10-6641-0125 Holtek Semiconductor Inc. (Chengdu Sales Office) 709, Building Champagne Plaza, No.97 Dongda Street, Chengdu, Sichuan, China 610016 Tel: 86-28-6653-6590 Fax: 86-28-6653-6591 Holtek Semiconductor (USA), Inc. (North America Sales Office) 46729 Fremont Blvd., Fremont, 94538 Tel: 1-510-252-9880 Fax: 1-510-252-9885 http://www.holtek.com
Copyright 2007 HOLTEK SEMICONDUCTOR INC. information appearing this Data Sheet believed accurate time publication. However, Holtek assumes responsibility arising from specifications described. applications mentioned herein used solely purpose illustration Holtek makes warranty representation that such applications will suitable without further modification, recommends products application that present risk human life malfunction otherwise. products authorized critical components life support devices systems. Holtek reserves right alter products without prior notification. most up-to-date information, please visit site http://www.holtek.com.tw.
Rev. 1.20
September 2007

Single-chip CMOS construction Single 1.5V battery operation Measuremen

Top Searches for this datasheet

Other recent searches