MAX9390EHJ+T

Overview

The MAX9390EHJ+T is a dual 2 x 2 crosspoint switch manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single 3.0V to 3.6V supply voltage and supports frequencies up to 1.5GHz. The device accepts LVDS or HSTL differential inputs and provides LVDS outputs compliant with the TIA/EIA-644 standard. It features independent enable controls for each output pair, fail-safe circuitry for undriven inputs, and ultra-low jitter performance with a maximum of 82ps peak-to-peak deterministic jitter. The component is housed in a 32-pin TQFP package and functions within an extended temperature range from -40°C to +85°C.

Feature Summary

• Configurable routing modes including 2x2 crosspoint switching, 2:1 multiplexing, 1:2 splitting, and dual repeater buffering
• High-level input fail-safe detection specifically designed for LVDS and HSTL signaling standards
• Ultra-low jitter characteristics ensuring reliable signal integrity for high-speed data links
• Independent channel enable logic allowing precise control over individual differential output pairs

Applications

• Protection switching in fault-tolerant systems
• Loopback switching for diagnostic testing
• Fanout buffering for clock and data distribution networks
• Signal regeneration in high-speed communication equipment

Procurement Notes

Verify the specific suffix EHJ+T against official manufacturer documentation to confirm lead-free status and package type. Confirm current availability status as distribution channels may indicate limited stock or discontinuation. Ensure compatibility with existing board layouts regarding the 32-pin TQFP footprint and thermal requirements before finalizing procurement decisions.

Selection Notes

Select this component when designing systems requiring flexible signal routing between multiple differential sources and destinations. It is suitable for applications needing low-noise signal distribution with independent channel control. Consider the MAX9391 variant if the design utilizes LVPECL or CML inputs instead of LVDS or HSTL signals.

Part Context

This part belongs to the MAX9390/MAX9391 series of analog and digital crosspoint switches. These devices are engineered for high-speed, low-power signal distribution in telecommunications and datacom environments. The series offers configurable topologies to support various system architectures without requiring external switching components.

Replacement Considerations

The MAX9391EHJ+T serves as a functional substitute for designs utilizing LVPECL or CML inputs rather than LVDS/HSTL. Verify pinout compatibility and electrical specifications against the target application requirements before implementing any replacement.

FAQ

What input signaling standards does the MAX9390EHJ+T support?

The MAX9390EHJ+T accepts LVDS and HSTL differential input signals.

How does the device handle undriven inputs?

Fail-safe circuitry forces the outputs to a differential low condition when inputs are undriven or when the common-mode voltage exceeds the specified range.

What is the maximum operating frequency of the switch?

The device guarantees operation at frequencies up to 1.5GHz.