Analog Devices Inc./Maxim Integrated MAX3371EXT+TG071

Overview

MAX3371EXT+TG071 from Maxim Integrated is a bidirectional logic-level translator IC designed for voltage domain bridging between low-voltage ASICs (down to +1.6V) and higher-voltage systems (+2.5V to +5.5V). It supports 2Mbps push-pull data transfer with 10pF load, features active shutdown (<1µA supply current), and places I/O pins in high-impedance state during shutdown - enabling use in multidrop I²C or SPI bus applications.

For engineers reviewing the MAX3371EXT+TG071 datasheet, MAX3371EXT+TG071 pinout, MAX3371EXT+TG071 application, or MAX3371EXT+TG071 equivalent, key selection criteria include verified bidirectional operation, shutdown control timing, VL/VCC supply range compatibility, and SC70-6 package footprint constraints.

Technical Context

The MAX3371EXT+TG071 implements a dual-rail, passive-bias bidirectional level-shifting architecture with internal 10kΩ pull-up resistors on both I/O VL and I/O VCC terminals. It requires no external direction-control signal and operates across independent VL (+1.6V to +5.5V) and VCC (+2.5V to +5.5V) supplies, with VL ≤ VCC enforced for correct threshold referencing.

Its speed-up circuitry reduces low-to-high propagation delay by activating transient pull-up switches for 320ns, improving rise time and duty cycle fidelity at 2Mbps. Shutdown is asserted via SHDN pin referenced to VL, disabling internal pull-ups and isolating I/O lines while drawing <1µA total supply current.

Key Specifications

Pinout & Package

MAX3371EXT+TG071 is housed in a 6-pin SC70 package (2.0mm × 1.25mm, 0.65mm pitch), optimized for space-constrained portable designs. The package is RoHS-compliant and lead(Pb)-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXS0102DCUR and SN74AVC4T245RTER, MAX3371EXT+TG071 uniquely combines guaranteed <1µA shutdown, integrated pull-ups, and SC70-6 size - making it optimal for space- and power-constrained portable I²C/SPI bridges where pin count and quiescent current are decisive.

Availability

MAX3371EXT+TG071 is available at Aetrix Electronics and suitable for portable POS systems, smart card readers, and cell phone hands-free kits requiring stable component supply across extended production lifecycles.

Supply support for MAX3371EXT+TG071 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 precision analog, mixed-signal, and high-reliability ICs for industrial, communications, and consumer applications.

The MAX3370/MAX3371 product line was designed specifically for low-voltage bidirectional level translation in battery-powered portable electronics - prioritizing ultra-low shutdown current, minimal footprint, and seamless integration with I²C and SPI buses.

FAQ

What is the maximum allowable voltage difference between VL and VCC for reliable operation of the MAX3371EXT+TG071?

The MAX3371EXT+TG071 requires VL ≤ VCC for correct internal threshold referencing. While VL may equal VCC (e.g., both at 3.3V), VL must never exceed VCC. Absolute maximum ratings allow VCC up to +5.5V and VL up to +5.5V, but functional operation mandates VL ≤ VCC - violation risks incorrect logic-level interpretation and potential data corruption.

Does the MAX3371EXT+TG071 require external pull-up resistors when used in I²C applications?

No. The MAX3371EXT+TG071 integrates 10kΩ pull-up resistors on both I/O VL and I/O VCC pins, eliminating the need for external pull-ups in standard I²C implementations. This reduces BOM count and PCB area - particularly valuable in space-constrained portable designs using the SC70-6 package.

How does the shutdown function of the MAX3371EXT+TG071 affect I/O pin states?

When SHDN is driven low, the MAX3371EXT+TG071 disables its internal 10kΩ pull-up resistors and places both I/O VL and I/O VCC pins in a high-impedance state with ≤1µA leakage current. This allows safe multidrop bus sharing and prevents contention during system sleep - a key advantage over non-shutdown translators like the MAX3370.

Can the MAX3371EXT+TG071 translate signals between 1.8V and 5V logic domains?

Yes. The MAX3371EXT+TG071 supports VL as low as +1.6V (e.g., 1.8V nominal) and VCC as high as +5.5V (e.g., 5V nominal), provided VL ≤ VCC. It has been validated for 1.8V ↔ 3.3V and 1.8V ↔ 5V translation in push-pull mode at up to 2Mbps with 10pF load - meeting timing requirements for SPI and fast-mode-plus I²C.

What is the purpose of the speed-up circuit in the MAX3371EXT+TG071?

The speed-up circuit in the MAX3371EXT+TG071 is a 320ns one-shot that temporarily activates internal pull-up switches during low-to-high transitions on either I/O VL or I/O VCC. This reduces rise time and propagation delay - improving signal fidelity and duty cycle accuracy at 2Mbps, especially under capacitive loading conditions where passive pull-ups alone would degrade performance.