DS2187

Telecom Overview

The DS2187 is a T1/CEPT Receive Line Interface chip designed to interface user equipment with North American (T1 1.544 MHz) and European (CEPT 2.048 MHz) primary rate communication networks. It extracts clock and data from twisted pair or coax transmission media, eliminating the need for discrete components and manual tuning. The device features a precision on-chip PLL that removes external crystal requirements. It decodes AMI, B8ZS, and HDB3 coded signals and is optimized for short loop applications like terminal equipment to DSX-1. It operates on a single 5V supply using low-power CMOS technology.

Telecom Feature Summary

• Extracts clock and data directly from twisted pair or coax transmission media without requiring external crystals or LC tanks due to an integrated precision PLL.
• Decodes AMI, B8ZS, and HDB3 coded signals while reporting alarm and error events for network monitoring.
• Designed specifically for short loop applications such as connecting terminal equipment to DSX-1 interfaces.

Telecom Applications

• Digital Access Carrier Systems (DACS)
• Channel Service Units (CSU)
• Customer Premises Equipment (CPE)
• Channel banks
• PABX-to-computer interfaces including DMI and CPI

Telecom Part Context

The DS2187 serves as the receive counterpart in Maxim Integrated's T1/CEPT line interface family. It is functionally paired with the DS2186 transmit line interface and the DS2188 jitter attenuator. It maintains compatibility with other devices in the series, such as the DS2180A, DS2181A, DS2141A, and DS2143 controllers, facilitating complete system integration for primary rate network termination.

Telecom Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should verify pinout and electrical compatibility if considering alternative vendors for T1/CEPT receive line interface functions.