IDT82V1054A

The IDT82V1054A is a feature rich, single-chip, programmable 4- channel PCM CODEC with on-chip filters. Besides the µ-Law/A-Law companding and linear coding/decoding (14 effective bits + 2 extra sign bits), the IDT82V1054A also provides 2 programmable tone generators per channel (which can generate ring signals) and 2 programmable chopper clocks for SLICs.

The digital filters in the IDT82V1054A provide necessary transmit and receive filtering for voice telephone circuits to interface with timedivision multiplexed systems. An integrated programmable DSP realizes AC impedance matching, transhybrid balance, frequency response correction and gain adjustment functions. The IDT82V1054A supports 2 PCM buses with programmable sampling edge, which allows an extra delay of up to 7 clocks. Once the delay is determined, it is effective to all four channels of the IDT82V1054A. The device also provides 7 signaling pins per channel for SLICs.

The IDT82V1054A is programmed via a Microprocessor Interface (MPI). Two PCM buses are provided to transfer the compressed or linear PCM data.

IDT82V1054A offers strong test capability with several analog/digital loopbacks and level metering function. It brings convenience to system maintenance and diagnosis.

A unique feature of "Hardware Ring Trip" is implemented in the IDT82V1054A. When an off-hook signal is detected, the IDT82V1054A will reverse an output pin to stop the ringing signal immediately.

The IDT82V1054A can be used in digital telecommunication applications such as Central Office Switch, PBX, DLC and Integrated Access Devices (IADs), i.e. VoIP and VoDSL.