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AF102 Datasheet Dial Tone Reject Filter

Manufacturer: National Semiconductor (now Texas Instruments)

Overview: o,N... u. ~National

General Description

The AF102 is a fourth order elliptic highpass filter designed to reject frequencies below 650Hz.

This filter rejects the 350Hz and 440Hz dial tone frequencies present on a telephone line.

The unit is fully tuned and requires no external components - only input, output and power supply connections.

Key Features

  • Fully tuned.
  • High input impedance.
  • Low output impedance.
  • Wide power supply range ±5V to ±18V ~ IZI k1UTPUT!-INZ LPZ LPI -INI HPZ 111 111 @±l NC 13124 23 22 21 20 19 18 17 16 15114 4th OROER HIGH PASS.