HT9201A/B
Simple Tone Dialer
Features
•
•
•
Patent Number: 113235(R.O.C.), 5424740(U.S.A.)
•
•
Operating voltage: 2.0V~5.5V
Low standby current
4
×
4 keyboard matrix
3.58MHz crystal or ceramic resonator
Four flash key times selectable for the
HT9201B
General Description
The HT9201A/B tone dialers are CMOS LSIs
designed for telecommunication systems. The
HT9201A is for mute output whereas the
HT9201B is for flash output. Both dialers pro-
vide good performance for regular DTMF dial-
ing with low distortion output and minimal ex-
ternal components.
Selection Table
Function
Item
HT9201A
HT9201B
√
—
√
√
F1,F2,F3,F4
MUT E
XM E
UT
Fla T im (m
sh
e s)
—
600/
300/
200/
90
A,B,C,D
DT M O
F utput
√
—
Package
16 DIP
16 DIP
Pin Assignment
1
3rd Dec ’97
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
