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HT1616C Datasheet

  • HT1616C

  • Timer with Dialer Interface

  • 13頁(yè)

  • HOLTEK

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HT1616C
Timer with Dialer Interface
Features
路
Operating voltage: 1.2V~1.7V
路
Low operating current: 4mA typ.
路
Dialing number and conversation time display
路
Conversation timer (59 mins and 59 secs max.)
路
12 or 16 digits LCD display driver; 3V, 1/2 bias, 1/3
Patent Number: 84545 (R.O.C.)
Patent Pending: 08/214, 079 (U.S.A.)
路
Stop watch
路
Built-in dialer interface
路
12-hour or 24-hour format
路
Two-button sequential operation for real
time clock setting
duty
路
Uses 32768Hz crystal
路
Real time clock
Applications
路
Timers, clocks and watches
路
LCD display drivers
路
Telephone display interface
路
Instrument display
General Description
The HT1616C is a CMOS chip designed for dialer inter-
faces driving 12 or 16-digit LCDs. Various functions,
such as real time clock, dialing number and conversa-
tion time display are provided.
For HT1616C 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 the real time is dis-
played again. When making a phone call, the HT1616C
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 restarts
the timer again. By adding a TIMER key, the IC can pro-
vide stopwatch and timer reset/hold functions. Refer to
the functional description for details.
Block Diagram
X 1
X 2
T 1
T 2
T im e r
D I
S K
S 2
S h ift
R e g is te r
D e c o d e r
&
M U X
S E G 1
S e g m e n t
L a tc h
&
S e le c t
S c a n
C K T
S E G 4 8
V o lta g e
D o u b le r
T im e
B a s e
C o m m o n
C ir c u it
IN T
C O M 1
C O M 2
C O M 3
V A
V B
V C
S ta te
C o n tro l
T IM E R
1 2 /2 4
S 1
H K
C o n tro l
C ir c u it
R E S
Rev. 1.10
1
September 13, 2001

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