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HT8870A Datasheet PDF

HTCSEMI HT8870A

The IC detects all sixteen standard DTMF signals and converts them into corresponding digital code. The signal received at the input of IC, is supplied to inverting input of operational amplifier VN, which gain ratio is set by external components (at typical application gain equals 1).
Part No. HT8870A
Datasheet HT8870A Download
Manufacturer
HTCSEMI
Description Dual Tone Multi Frequency
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HT8870A datasheet page 1 preview

DESCRIPTION

Operational amplifier non-inverting input Operational amplifier inverting input Operational amplifier output terminal Reference voltage output terminal “1633 Hz signal detection disable” input Power down mode input Clock oscillator input Clock oscillator output Common “Output enable” input Three-state data output Three-state data output Three-state data output Three-state data output Delay control output Early steering output Protection time control input/output Supply voltage input Rev. 00 HT8870A Symbol Parameter UCC Supply voltage UI Input voltage Value Unit Min. Max. - 0,3 6,0 V - 0,3 UCC + 0,3 V V Table 3 – Recommended operation conditions Symbol Parameter UCC Supply voltage ICC Consumption current TA Operating temperature range Value Unit Min. Max. 2,5 5,5 V - 7,0 mA - 20 75 oC Rev. 00 HT8870A Symbol Parameter ICC Consumption current ISTB Stand-by mode consumption current UIL Low level input voltage UIH High level input voltage IIL Low level input current IIH High lev...
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