Analog Devices Inc./Maxim Integrated MAX3343EEBE-T

Overview

The MAX3343EEBE-T from Maxim Integrated is a ±15kV ESD-protected, bidirectional USB level translator IC that converts logic-level signals (1.8V–3.6V) to full-speed (12Mbps) or low-speed (1.5Mbps) USB differential signals and vice versa. It integrates a 1.5kΩ internal termination resistor, a 3.3V linear regulator (VTRM) capable of sourcing up to 15mA, and supports reenumeration with power applied. It is used in portable USB peripherals requiring robust ESD immunity and low-voltage system-side interfacing.

For engineers reviewing the MAX3343EEBE-T datasheet, MAX3343EEBE-T pinout, MAX3343EEBE-T application, or MAX3343EEBE-T equivalent, key selection criteria include its UCSP-16 package, suspend-mode current (<200µA), dual-mode (single-ended/differential) logic interface, and compliance with USB 1.1/2.0 physical layer specifications.

Technical Context

The MAX3343EEBE-T implements a dual-rail architecture with independent VCC (4V–5.5V, USB side) and VL (1.8V–3.6V, logic side), eliminating power-supply sequencing requirements. Its MODE pin selects between single-ended (MODE = 0) and differential (MODE = 1) logic-side input/output configurations, while SPEED controls USB speed selection (full-speed via D+ pullup, low-speed via D− pullup).

It features separate OE (output enable) and ENUMERATE control inputs - unlike the MAX3340E - enabling independent direction control and on-the-fly USB reenumeration by driving ENUMERATE low. The device maintains active receive capability (VP/VM/RCV) even in SUSP high suspend mode, with RCV forced low and D+/D− placed in high-impedance state.

Key Specifications

Pinout & Package

The MAX3343EEBE-T is housed in a 16-pin Ultra-Thin Chip-Scale Package (UCSP), measuring 4mm × 4mm × 0.5mm, with bottom-terminal ball grid array (BGA) layout optimized for space-constrained portable designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB level translation applications.

Compared with MAX3340EEBE-T and TPD6S300ARVCR, the MAX3343EEBE-T uniquely integrates level translation, USB termination, 3.3V regulation, and deterministic reenumeration in a single UCSP-16 package - reducing total solution size and enabling firmware-controlled USB configuration changes without host intervention.

Availability

The MAX3343EEBE-T is available at Aetrix Electronics and suitable for smartphone docking, industrial data cradles, USB audio adapters, and embedded HID peripherals requiring stable component supply and guaranteed long-term manufacturability.

Supply support for MAX3343EEBE-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.

The MAX3343E product line was designed specifically for space-constrained, low-power USB peripheral interfaces requiring integrated level translation, ESD protection, and flexible protocol reconfiguration - targeting portable and embedded USB endpoints.

FAQ

What is the primary function of the MAX3343EEBE-T in a USB interface design?

The MAX3343EEBE-T serves as a bidirectional USB level translator, converting 1.8V–3.6V logic signals to USB-compliant differential D+/D− signals (and vice versa) while integrating ESD protection, termination resistors, and a 3.3V regulator. It eliminates discrete level-shifting components and simplifies USB peripheral design in the MAX3343EEBE-T's target applications.

How does the MAX3343EEBE-T achieve USB reenumeration without power cycling?

The MAX3343EEBE-T achieves live reenumeration via its dedicated ENUMERATE pin: driving ENUMERATE low disconnects the internal 1.5kΩ pullup resistor from both D+ and D−, signaling the USB host to reenumerate the device. This allows firmware to change descriptors or configurations dynamically - a capability confirmed in the MAX3343EEBE-T datasheet's Applications Information section.

Can the MAX3343EEBE-T operate with a 1.8V logic supply (VL), and what is the impact on performance?

Yes, the MAX3343EEBE-T supports VL from 1.8V to 3.6V. At 1.8V, VOH remains ≥(2/3)×VL (≥1.2V) and VOL ≤0.4V per datasheet specs, ensuring reliable CMOS logic interfacing. Propagation delay increases slightly (e.g., ~7ns longer at VL = 1.8V vs. 3.3V), but remains within USB timing budgets for both full- and low-speed modes.

What external components are mandatory for proper operation of the MAX3343EEBE-T?

Mandatory external components for the MAX3343EEBE-T include: two 24.3Ω ±1% resistors (one in series with D+, one with D−), a 1µF ceramic capacitor from VTRM to GND, a 0.1µF ceramic capacitor from VL to GND, and dual bypass capacitors (0.1µF ceramic + 10µF electrolytic) from VCC to GND. These ensure USB signal integrity, regulator stability, and noise immunity.

Does the MAX3343EEBE-T support both full-speed and low-speed USB operation, and how is the mode selected?

Yes, the MAX3343EEBE-T supports both full-speed (12Mbps) and low-speed (1.5Mbps) USB operation. The SPEED pin selects the mode: driven high for full-speed (internal 1.5kΩ resistor connected to D+), driven low for low-speed (resistor connected to D−). This selection is explicitly defined in the MAX3343EEBE-T's Pin Description and Functional Diagram sections.