Analog Devices Inc./Maxim Integrated MAX3393EEUD+

Overview

The MAX3393EEUD+ from Maxim Integrated is a quad unidirectional logic-level translator enabling voltage-domain bridging between low-voltage (VL = +1.2V to +5.5V) and higher-voltage (VCC = +1.65V to +5.5V) digital systems. It supports guaranteed 8Mbps data rate across full voltage range, delivers ±15kV HBM ESD protection on VCC-side I/Os, features three-state output control, and operates with quiescent current as low as 130µA - ideal for interfacing 1.8V/2.5V microcontrollers with 3.3V/5V peripherals in portable communication devices.

For engineers reviewing the MAX3393EEUD+ datasheet, MAX3393EEUD+ pinout, MAX3393EEUD+ application, or MAX3393EEUD+ equivalent, key selection criteria include its unidirectional VL→VCC translation direction per channel, 14-pin TSSOP package compatibility, thermal short-circuit protection, slew-rate-limited 8Mbps timing performance under 15pF load, and support for mixed-voltage SPI/I²C signal routing without level-shifter biasing resistors.

Technical Context

The MAX3393EEUD+ implements four independent unidirectional level-shifting channels using MOSFET-based pass-gate architecture with integrated speed-up circuitry. Each channel translates signals strictly from VL-referenced inputs (I/O VL1–VL4) to VCC-referenced outputs (I/O VCC1–VCC4), with input thresholds defined as VIHL = VL − 0.2V and VILC = 0.15V.

It incorporates a dedicated THREE-STATE enable input referenced to VL that forces all I/O lines into high-impedance mode, reducing total supply current to <1µA. Thermal shutdown activates at TJ = +152°C and recovers at +142°C, while ESD protection meets ±15kV HBM on VCC-side pins without external components.

Key Specifications

Pinout & Package

The MAX3393EEUD+ is housed in a 14-pin TSSOP package (3.0mm × 4.4mm, 0.65mm pitch) with exposed pad grounded for thermal performance. Pin functions are electrically isolated per channel and require no shared reference beyond GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX3392EEUD+, the MAX3393EEUD+ offers identical electrical behavior but distinct traceability; versus TXS0104EJR, it trades auto-direction capability for superior ESD immunity and thermal fault protection - critical in externally routed signal paths.

Availability

MAX3393EEUD+ is available at Aetrix Electronics and suitable for portable communication devices, smart card readers, and SPI/I²C interface design requiring stable component supply, long-term lifecycle assurance, and compliance with industrial-grade reliability standards.

Supply support for MAX3393EEUD+ 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) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.

The MAX3393EEUD+ belongs to the MAX3372E–MAX3393E family of ESD-hardened level translators engineered specifically for reliable multivoltage interconnect in space-constrained portable electronics.

FAQ

What is the maximum data rate supported by the MAX3393EEUD+ under standard operating conditions?

The MAX3393EEUD+ guarantees 8Mbps operation across its full specified voltage range (+1.2V ≤ VL ≤ VCC ≤ +5.5V) with 15pF capacitive load and driver impedance ≤50Ω. Within narrower domains - such as +1.8V ≤ VL ≤ VCC ≤ +2.5V - it achieves up to 16Mbps, as confirmed in the Timing Characteristics table of the official datasheet. This performance is enabled by internal rise-time accelerators and validated with CLOAD = 15pF test conditions.

Does the MAX3393EEUD+ support bidirectional level translation?

No, the MAX3393EEUD+ is strictly a unidirectional level translator, configured for VL → VCC signal flow only on each of its four channels. Unlike the MAX3377E/MAX3378E in the same family, it does not implement transmission-gate topology for bidirectional operation. Its pinout and internal architecture assign I/O VLx as inputs and I/O VCCx as outputs - reversing signal direction requires external redesign or selecting a different part such as MAX3378E.

How does the THREE-STATE pin function on the MAX3393EEUD+?

The THREE-STATE pin on the MAX3393EEUD+ is an active-low control input referenced to VL. When pulled low, it disables all four translation channels and places both I/O VLx and I/O VCCx lines in high-impedance state, reducing total supply current to less than 1µA. During normal operation, it must be tied to VL (logic high). This feature enables multidrop bus configurations and low-power sleep modes without external isolation switches.

What ESD protection level does the MAX3393EEUD+ provide, and on which pins?

The MAX3393EEUD+ provides ±15kV Human Body Model (HBM) ESD protection on all VCC-referenced I/O pins (I/O VCC1 through I/O VCC4), as verified per JEDEC JS-001. Protection is also rated at ±8kV contact discharge and ±10kV air-gap discharge per IEC 1000-4-2. VL-side pins (I/O VL1–VL4) meet standard HBM requirements but lack the enhanced ±15kV rating. No external TVS diodes are required for basic ESD compliance in handheld interfaces.

Can the MAX3393EEUD+ operate with VL greater than VCC?

No - the MAX3393EEUD+ requires VL ≤ VCC + 0.3V for safe operation, as specified in Absolute Maximum Ratings and Electrical Characteristics. While transient VL > VCC during power-up will not damage the device (per Note 2), sustained violation risks latch-up or undefined logic thresholds. Designers must ensure proper power sequencing or use external supervision to prevent VL from exceeding VCC + 0.3V during active operation, especially in systems with independent voltage rails.