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HT1612 数据表(PDF) 1 Page - Holtek Semiconductor Inc

部件名 HT1612
功能描述  Timer with Dialer Interface
Download  14 Pages
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制造商  HOLTEK [Holtek Semiconductor Inc]
网页  http://www.holtek.com
标志 HOLTEK - Holtek Semiconductor Inc

HT1612 数据表(HTML) 1 Page - Holtek Semiconductor Inc

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HT1612
Timer with Dialer Interface
Features
Operating voltage: 1.2V~1.7V
Dialing number and conversation time display
Conversation timer (Max. to 59 mins and 59
secs)
Operation current: 10
µA (Typ.)
32768Hz crystal
8 or 10 digits LCD display driver, 3V, 1/2
bias, 1/3 duty (8 digits hand-held calculator
LCD is used for 8 digits application)
Built-in dialer interface
General Description
The HT1612 is a CMOS chip designed for dialer
interface which drives 8 or 10 digits LCD. Vari-
ous functions, such as displaying dialing num-
ber and conversation time, are provided.
It normally shows blanks. The timer is started
to tell users how long the conversation time has
been taken when answering a telephone call.
After hanging up the telephone, it returns to
show blanks immediately. Whenever makeing a
phone call, the HT1612 receives dialing data
from the dialer and displays the phone number
from left to right on the LCD. However, if there
is no dialing action within 10 seconds, it re-
starts the timer again. By adding a TIMER key,
the HT1612 can provide the timer reset/hold
functions (refer to functional description for
more details).
Applications
Timers
LCD display drivers
Telephone display interface
Instrument display
1
5th July ’95


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