MAX3891ECB+D

Serializers, Deserializers Overview

The MAX3891ECB+D is a 16:1 serializer designed for ATM and SDH/SONET applications. It converts 155Mbps parallel data to 2.5Gbps serial data using single-ended LVPECL inputs and differential LVPECL outputs. An internal PLL synthesizes a 2.5Gbps clock from reference rates of 155.52MHz, 77.76MHz, 51.84MHz, or 38.88MHz. The device operates on a single +3.3V supply with typical power consumption of 495mW. It features a CML loopback output for diagnostics and is housed in a 64-pin TQFP exposed pad package.

Serializers, Deserializers Feature Summary

• Converts 16-bit wide parallel data to high-speed serial streams
• Integrates a fully synthesized PLL for clock generation
• Provides differential LVPECL outputs and single-ended PECL inputs
• Includes CML loopback outputs for system diagnostic testing

Serializers, Deserializers Applications

• 2.5Gbps SDH/SONET transmission systems
• 2.5Gbps access nodes
• Add/drop multiplexers
• Digital cross-connects
• ATM backplanes

Serializers, Deserializers Procurement Notes

Verify the component matches the exact part number MAX3891ECB+D. Confirm the manufacturer is Analog Devices Inc./Maxim Integrated. Ensure the package is a 64-pin TQFP with an exposed pad. Check that the temperature range is -40°C to +85°C. Validate RoHS compliance status through official documentation.

Serializers, Deserializers Selection Notes

Select this component when interfacing high-speed digital circuitry requires converting 16-bit parallel data to a 2.5Gbps serial stream. It is suitable for designs needing integrated clock synthesis from standard reference frequencies. Consider the 64-pin TQFP EP package constraints and thermal requirements for proper heat dissipation.

Serializers, Deserializers Part Context

This device belongs to the MAX3891 family of serializers manufactured by Maxim Integrated. It is specifically engineered for telecommunications infrastructure requiring precise timing and high-speed data serialization. The EC suffix indicates the extended temperature range variant.

Serializers, Deserializers Replacement Considerations

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

Serializers, Deserializers FAQ

What reference clock frequencies does the MAX3891 support?

The MAX3891 accepts differential LVPECL reference clock rates of 155.52MHz, 77.76MHz, 51.84MHz, or 38.88MHz.

How is the system loopback feature enabled?

The CML loopback outputs (SLBO) are enabled by applying a TTL logic-high signal to the SOS input pin.

What is the function of the CLKSET pin?

The CLKSET pin programs the reference clock rate. Connecting it to VCC sets 155.52MHz, leaving it open sets 77.76MHz, connecting to GND via 20kΩ sets 51.84MHz, and connecting directly to GND sets 38.88MHz.