HT7500 datasheet(1/8 Pages) HOLTEK

Part #	HT7500

Description	Clinical Thermometer

PDF	8 Pages

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Manufacturer	HOLTEK [Holtek Semiconductor Inc]

Direct Link	http://www.holtek.com

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HT7500

Clinical Thermometer

Block Diagram

1

August 8, 2000

Features

·

Single-chip CMOS construction

·

Single 1.5V battery operation

·

Measurement range: +32.0~+42.0°C

(+90.0~+108.0°F)

Measurement accuracy: ±0.1°C(±0.2°F)

Resolution: 0.1°C (0.1°F)

·

Bonding option for Centigrade/Fahrenheit

measurement

·

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 HT7500 is a CMOS digital clinical ther-

mometer IC for measuring body temperature in

Centigrade (°C) or Fahrenheit (°F) mode by its

bonding option. It also provides alarm and auto

power off functions. The other electronic com-

ponents are LCD display, thermister, 1.5V bat-

tery, ON/OFF switch, buzzer, resistors and

capacitors.

S yst e m

OS C

C o unt er and

C o m p a r at or

TI M E R

C ont r o l

Ci r c u i t

S ens or

OS C

Pu l s e

G ene r a t o r

Vo l t a g e

D o ubl e r

C oun t e r ,

C o m p a r at or a n d

Lat c h

Pu l s e

Ta b l e

LCD Dr i v e r

OS C I

OS C O

T EST 2

PS W

CLF H

RF

RS

SC

VD D

VS S

CO M 1 ~ 3

SA 1 ~ S D 1

C 512

CA P

VE E

LOW C

BZ 1

BZ 2

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HT7500 Datasheet(PDF) 1 Page - Holtek Semiconductor Inc

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