AMS  AS2540  Audio Control, Telephone, 3.6V to 5V, 2 Wire, Serial, SOIC, 28 Pins, -15 °C

AMS AS2540
Technical Data Sheet (248.48KB) EN See all Technical Docs

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Product Overview

The AS2540 is a remote-controlled single-chip telephone CMOS Integrated Circuit that incorporates a speech circuit, MF dialer, ring frequency detector, ring melody generator and a two wire serial interface. It is a/b-line-powered device in order to interface a main-powered CPU to the analogue telephone line. It can operate in a so-called mainpower mode and in a backup mode. During mainpower mode, a watchdog timer is running on this, which has to be reset via the serial interface, which is connected to the CPU through opto-couplers.
  • Programmable via 2-wire serial interface
  • Watch dog timer for backup mode
  • Additional input for modem transmit path
  • Additional output for modem receive path
  • Low noise (maximum -72dBm)
  • Soft clipping for handset operation to avoid harsh distortion
  • Line loss compensation selectable by pin option
  • Real and complex impedance selectable by external
  • Side tone adaption selectable by external components
  • Ring frequency discrimination


Product Information

Audio Control Type:
Supply Voltage Range:
3.6V to 5V
Control Interface:
2 Wire, Serial
Audio IC Case Style:
No. of Pins:
Operating Temperature Min:
Operating Temperature Max:
Product Range:
Automotive Qualifications Standard:
MSL 3 - 168 hours
No SVHC (20-Jun-2016)

Find similar products  grouped by common attribute


  • Consumer Electronics;
  • Computers & Computer Peripherals;
  • Industrial

Legislation and Environmental

Moisture Sensitivity Level:
MSL 3 - 168 hours
RoHS Compliant:
Authorized Distributor

Associated Products

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