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HM9270D

ELAN Microelectronics Corp
Part Number HM9270D
Manufacturer ELAN Microelectronics Corp
Description DTMF RECEIVER
Published Mar 26, 2005
Detailed Description HM 9270C/D DTMF RECEIVER General Description The HM 9270C/D is a complete DTMF receiver integrating both the bandsplit ...
Datasheet PDF File HM9270D PDF File

HM9270D
HM9270D

Overview
HM 9270C/D DTMF RECEIVER General Description The HM 9270C/D is a complete DTMF receiver integrating both the bandsplit filter and digital decoder functions.
The filter section uses switched capacitor techniques for high- and low-group filters and dial-tone rejection.
Digital counting techniques are employed in the decoder to detect and decode all 16 DTMF tonepairs into a 4-bit code.
External component count is minimized by on-chip provision of a differential input amplifier, clock-oscillator and latched 3-state bus interface.
Features • • • • • • • • Complete receiver in an 18-pin package.
Excellent performance.
CMOS, single 5 volt operation.
Minimum board area.
Central office quality.
Low...


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