HT1611C datasheet(1/13 Pages) HOLTEK

No de pièce	HT1611C

Description	Timer with Dialer Interface

PDF	13 Pages

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Fabricant	HOLTEK [Holtek Semiconductor Inc]

Site Internet	http://www.holtek.com

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HT1611C

Timer with Dialer Interface

Block Diagram

Rev. 1.10

1

August 17, 2001

General Description

The HT1611C is a CMOS chip designed for dialer inter-

faces driving 8 or 10-digit LCDs. Various functions, such

as real time clock, dialing number and conversation time

display are provided.

The real time is displayed by default. When answering a

telephone call, the timer is activated to tell users how

long the conversation has taken. After the telephone is

hung up, the total conversation time is shown for about 5

seconds and then the real time is displayed again.

When making a phone call, the HT1611C receives the

dialing data from the dialer and displays the phone num-

ber from left to right on the LCD. However, if there is no

dialing action within 10 seconds, it restarts the timer

again. By adding a TIMER key, the HT1611C can pro-

vide a stopwatch function and timer reset/hold functions

(for details, refer to the functional description).

Features

· Operating voltage: 1.2V~1.7V

· Low operating current: 3mA (typ.)

· Dialing number and conversation time display

· Conversation timer (59 mins and 59 secs max.)

· 8 or 10-digit LCD display driver; 3V,1/2 bias, 1/3 duty

(8-digit hand-held calculator LCD used for 8-digit ap-

plications)

· Real time clock with stopwatch

· Built-in dialer interface

· 12-hour or 24-hour format

· Two-button sequential operation for real time clock

setting

· Uses 32768Hz crystal

Applications

· Timers, clocks, watches

· LCD display drivers

· Telephone display interface

· Instrument display

Patent Number: 84545 (R.O.C.)

Patent Pending: 08/214, 079 (U.S.A.)

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