DS2188S

Specialized ICS Overview

The DS2188S is a T1/CEPT jitter attenuator integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It utilizes a 128 x 2-bit buffer and an external crystal to reduce clock and data jitter in T1 or CEPT lines, meeting specifications such as TR62411, G.735, and G.742. The device operates on a single +5V supply with a typical current of 2 mA. It features selectable buffer depths (128 or 32 bits) via the BDS pin and allows for easy disabling of jitter attenuation. The component is housed in a 16-pin SOIC package and supports commercial temperature ranges from 0°C to +70°C.

Specialized ICS Feature Summary

• Attenuates jitter in T1 (1.544 MHz) and CEPT (2.048 MHz) signals using a DPLL-driven FIFO buffer.
• Requires only one external crystal: 6.176 MHz for T1 or 8.192 MHz for CEPT.
• Selectable buffer depth of 128 bits (handles up to 120 UIpp jitter) or 32 bits (handles up to 28 UIpp).
• Jitter attenuation function can be disabled by pulling the DJA pin high.

Specialized ICS Applications

• T1/CEPT receive line interface applications.
• T1/CEPT transmit line interface synchronization.
• Network interface units requiring jitter reduction.

Specialized ICS Procurement Notes

Verify the specific suffix 'S' confirms the 16-pin SOIC package and commercial temperature range (0°C to +70°C). Ensure the design includes the required external crystal (6.176 MHz for T1 or 8.192 MHz for CEPT) as the device does not contain an internal oscillator. Confirm that the application logic correctly handles the Buffer Limit (BL) pin status if operating near jitter limits.

Specialized ICS Selection Notes

Select the DS2188S when surface-mount packaging is required for commercial temperature environments. Choose the DS2188SN variant if industrial temperature operation (-40°C to +85°C) is necessary. Consider the DS2188 or DS2188N if through-hole DIP packaging is preferred. Ensure the system design accommodates the 16-pin SOIC footprint and the external crystal requirements specified in the datasheet.

Specialized ICS Part Context

The DS2188S belongs to the DS2188 family of T1/CEPT jitter attenuators. It serves as a companion to other line interface components such as the DS2186 (Transmit Line Interface), DS2187 (Receive Line Interface), and DS2180A/DS2181A transceivers. The 'S' suffix specifically denotes the 16-pin SOIC package version within this product line.

Specialized ICS Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.