ZL50020GAG2

Overview

The ZL50020GAG2 is a digital bus switch IC manufactured by Microchip Technology, designed for telecommunications applications. It functions as an enhanced 2K digital switch featuring a 2048 channel x 2048 channel non-blocking architecture. The device supports Time Division Multiplex (TDM) switching at data rates of 8.192 Mbps and 16.384 Mbps, or mixed rates including 2.048, 4.096, 8.192, and 16.384 Mbps. It integrates 32 serial TDM input streams and 32 serial TDM output streams, with configurable bidirectional outputs for backplane connections. The component operates within a supply voltage range of 1.71V to 1.89V, drawing up to 120mA of supply current. It is housed in a 256-LQFP package (28x28 mm) and is rated for industrial temperatures from -40°C to +85°C.

Feature Summary

• Provides high-density non-blocking switching capability with 2048 channels on both input and output sides.
• Supports flexible per-stream input and output data rate conversion across multiple standard telecommunication speeds.
• Includes exceptional input clock cycle-to-cycle variation tolerance to ensure signal integrity.
• Features per-stream high impedance control outputs for specific output stream management.

Applications

• Telecommunications network infrastructure requiring TDM switching
• Backplane interconnection systems utilizing bidirectional output configurations
• Digital cross-connect systems handling mixed-rate TDM streams

Procurement Notes

The ZL50020GAG2 is identified as an End-of-Life (EOL) product by the manufacturer. Verification of availability should focus on remaining stock from authorized distributors or secondary market suppliers. Buyers must confirm the authenticity of components sourced outside official channels due to the discontinuation status. Compliance with RoHS directives should be verified against specific batch documentation, as legacy EOL parts may have varying environmental compliance records depending on their production date.

Selection Notes

Engineers selecting this component should verify compatibility with existing system voltages, specifically the 1.71V to 1.89V supply requirement. The 256-LQFP package dimensions and pinout must match the PCB layout constraints. Since the device supports mixed data rates, design validation should include testing for jitter attenuation and holdover performance under varying load conditions. Alternative solutions should be evaluated if long-term supply stability is a critical project requirement.

Part Context

This part belongs to the ZL50020 family of enhanced digital switches from Microchip Technology. It shares core architectural features with other members like the ZL50020QCG1 but differs in packaging and potentially speed grades. The family is characterized by its ability to handle large-scale TDM switching with integrated DPLL capabilities for clock recovery and synchronization in telecom environments.

Replacement Considerations

As the ZL50020GAG2 is discontinued, direct replacements are limited. Potential substitutes include other Microchip ZL500xx series devices with compatible channel counts and interface types, such as the ZL50010 or ZL50012 families, though pinouts and feature sets will differ significantly. System redesign may be necessary to accommodate alternative components.