AS2525 SINGLE CHIP PHONE

AUDIO

AS2525 SINGLE CHIP PHONE

Single-Chip Speakerphone IC with a Serial Interface to a EEPROM

The AS2525 is a single-chip IC for feature phones, answering machines and fax machines. It contains an analog line interface and speech circuit for a/b terminals, loudhearing, handsfree, enhanced LD/MF dialler, tone ringer with DC-DC converter and serial interface to EEPROM. The circuit is fully line powered and uses an external EEPROM for a 32 digit last number redial storage and memories for 28 numbers each containing up to 24 digits/data.

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KEY FEATURES

  • Line/Speakerphone circuit, LD/MF repertory dialler, and tone ringer on one 44 pin CMOS chip
  • All significant parameters programmable with external EEPROM
  • Handsfree function with enhanced voice switching
  • Serial interface for EEPROM and LCD driver
  • Operating range from 15mA to 100mA (down to 5mA with reduced performance)

KEY BENEFITS

  • The programming of all parameters through an external EEPROM allows easy adaptation to various PTT requirements worldwide
  • Unique EMC performance
  • No external power supply (line powered)

AS2525 APPLICATIONS

Enhanced handsfree feature phones, answering machines and fax machines.

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AS2525 PRODUCT FACTS

Supply voltage [V]3.0 to 5.0
Operating range [mA]15 to 150
Temperature range [°C]-25 to 70
Last number + memory dialing
29
Tone ringer
Handsfree function
Package
TQFP-44,die on foil