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HT9201B

Holtek Semiconductor
Part Number HT9201B
Manufacturer Holtek Semiconductor
Description (HT9201A/B) Simple Tone Dialer
Published Feb 14, 2007
Detailed Description www.DataSheet4U.com HT9201A/B Simple Tone Dialer Features • • • Patent Number: 113235(R.O.C.), 5424740(U.S.A.) • • Op...
Datasheet PDF File HT9201B PDF File

HT9201B
HT9201B

Overview
www.
DataSheet4U.
com 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 provide good performance for regular DTMF dialing with low distortion output and minimal external components.
Selection Table Function Item HT9201A HT9201B √ — √ √ F1,F2,F3,F4 MUT E XM UT E Fla sh T im e (m s) — 600/ 300/ 200/ 90 A,B,C,D DT M FO utput √ — Package 16 DIP 16 DIP Pin Assignment 1 3rd Dec ’97 HT9201A/B Keyboard Information Block Diagram Pin Description Pin Name I/O Internal Connection Description These pins form a 4×4 keyboard matrix which can perform keyboard input detection and dialing specification setting funct...


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