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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 telecommunic...