Description

The NLC322522T-180K-PF is a Dual ProSLIC® IC that combines the SLIC (Subscriber Line Interface Circuit) and CODEC (Coder-Decoder) functionality into a single low-voltage CMOS device. It is designed to provide a complete two-channel analog telephone interface according to LSSGR, ITU, and ETSI standards. With the inclusion of a linefeed IC (LFIC), it offers a comprehensive solution for telecom applications.

Specifications and features

• Performs all BORSCHT (Battery, Overvoltage Protection, Ringing, Signaling, Coding, Hybrid, and Testing) functions

• Suitable for short or long-loop applications

• Supports internal balanced or unbalanced ringing

• Low power consumption

• Software-programmable parameters:

  ◦ Ringing frequency, amplitude, cadence, and waveshape

  ◦ Two-wire ac impedance

  ◦ Transhybrid balance

  ◦ DC current loop feed (10–45 mA)

  ◦ Loop closure and ring trip thresholds

  ◦ Ground key detect threshold

• Integrated dc-dc controller

• Wideband CODEC (Si3227)

• Low-power sleep mode

• On-hook transmission

• Loop or ground start operation

• Smooth polarity reversal

• DTMF (Dual-Tone Multi-Frequency) generator/decoder

• A-Law/µ-Law companding, linear PCM (Pulse Code Modulation)

• PCM and SPI bus digital interfaces with programmable interrupts

• GCI/IOM-2 mode support

• 3.3 V operation

• GR-909 loop diagnostics

• Audio diagnostics with loopback

• Pb-free/RoHS-compliant packaging

Application Scenarios

• Customer Premises Equipment (CPE)

• Optical Network Terminals (ONT)

• Private Branch Exchange (PBX)

• Cable EMTAs, ATAs, VoIP Gateways

Comparison

- Integration of SLIC and CODEC functionality for a complete telephone interface

- Support for various programmable parameters, offering flexibility in different applications

- Low power consumption for energy efficiency

- Wideband CODEC and smooth polarity reversal for high-quality audio transmission

- Compatibility with different telecom standards and diagnostic features for easy implementation and troubleshooting

- Requires additional linefeed IC (LFIC) for a complete two-channel interface