MAX3094EEUE+

Overview

The MAX3094EEUE+ is a low-power, quad RS-422/RS-485 receiver designed for harsh environments. It operates from a single +3.3V supply and supports data rates up to 10Mbps. The device features ±15kV ESD protection via the Human Body Model and IEC 1000-4-2 standards. Propagation delays are guaranteed within ±10ns tolerance. It includes a 1nA shutdown mode and a fail-safe feature ensuring a logic-high output when inputs are open. The component is housed in a 16-pin TSSOP package and functions as a pin-compatible upgrade to the '34C86.

Feature Summary

• Provides robust electrostatic discharge protection on all receiver inputs for reliable operation in electrically noisy environments.
• Ensures precise timing synchronization across multiple devices through tightly matched propagation-delay tolerances.
• Supports high-density bus configurations by presenting a quarter-unit-load input impedance.

Applications

• Telecommunications equipment
• Rugged RS-422/RS-485/RS-423 bus receivers
• Receivers for ESD-sensitive applications
• Level translators

Procurement Notes

Verify that the specific ordering suffix corresponds to the extended industrial temperature range (-40°C to +85°C) required for the application environment. Confirm the package type matches the PCB footprint design. Ensure the supply voltage aligns with the +3.3V specification rather than the +5V variant. Check for lead-free compliance if mandated by regional regulations.

Selection Notes

Select this component when a low-power RS-422/RS-485 receiver is needed for systems requiring strict propagation delay matching between multiple ICs. It is suitable for designs where power consumption must be minimized during idle states using the shutdown mode. Choose this part over the MAX3093E specifically when the system architecture relies exclusively on a +3.3V power rail.

Part Context

This device belongs to the MAX309xE family of rugged, low-power quad receivers. It serves as a direct pin-compatible replacement for the industry-standard '34C86 receiver. The MAX3094E variant is distinct from the MAX3093E primarily due to its optimized operation at +3.3V, whereas the MAX3093E operates at +5V.

Replacement Considerations

The MAX3094EEUE+ is a pin-compatible upgrade to the '34C86. Designers replacing legacy components should verify that the existing circuitry supports the lower +3.3V operating voltage requirement of this specific receiver model.

FAQ

How does the MAX3094EEUE+ handle an open-circuit input condition?

The device incorporates a fail-safe feature that guarantees a logic-high output state if the differential input voltage falls below the sensitivity threshold, such as when the inputs are left open.

What is the maximum number of receivers supported on a single bus?

Due to its quarter-unit-load input impedance, the MAX3094EEUE+ allows up to 128 receivers to be connected to a standard RS-485 bus.

What is the typical current consumption in shutdown mode?

When both enable inputs (ENAC and ENBD) are driven low, the device enters a low-power shutdown mode with a typical supply current of 1nA.