AF121 - DTMF Bandpass Filters

Product Overview

National Semiconductor

Part number	AF121
Manufacturer	National Semiconductor
File Size	128.64 KB
Description	DTMF Bandpass Filters
Datasheet	AF121 Datasheet
Additional preview pages of the AF121 datasheet.

The AF121 and AF122 are 6th order elliptic bandpass filters designed for use with digital DTMF detectors.

These filters are compatible with tone detector circuits such as the Rockwell CRC8030 and the Mostek MK5102 DTMF digital receivers.

Compatible with Rockwell CRC8030 and Mostek MK5102.
Gain o±0.5 dB.
Ripple 2 dB peak to peak.
Input Impedance 175 kn min.
Power Supply ±5V to ±18V Connection Diagram Dual-In-Line Package INPUT VTOP VIEW GND Unspecified pins are for internal use only and should not be used for external connection. Order Number AF121-1CJ, AF121-2CJ AF122-1CJ, AF122-2CJ 14-40 Absolute Maximum Ra.

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Published: Sep 25, 2017 |