Analog Devices Inc./Maxim Integrated MAX3371ELT+T

Overview

MAX3371ELT+T from Maxim Integrated is a bidirectional logic-level translator IC enabling voltage translation between 1.6V–5.5V VL and 2.5V–5.5V VCC domains, supporting up to 2Mbps push-pull and 500kbps open-drain data rates, with <1µA shutdown current and high-impedance I/O during shutdown - used in SPI, I²C, and smart card reader interfaces.

For engineers reviewing the MAX3371ELT+T datasheet, MAX3371ELT+T pinout, MAX3371ELT+T application, or MAX3371ELT+T equivalent, this page delivers verified electrical parameters, µDFN-6 package details, shutdown behavior, timing under defined load conditions, and real-world interface use cases without generic assumptions.

Technical Context

The MAX3371ELT+T implements a dual-rail bidirectional level-shifting architecture with internal 10kΩ pull-up resistors on both I/O VL and I/O VCC pins, enabling compatibility with open-drain drivers like I²C. Its speed-up circuit reduces low-to-high propagation delay by activating transient pull-up switches for 320ns.

SHDN is an active-low control input referenced to VL; pulling SHDN low disconnects internal pull-ups and places both I/Os in high-impedance state while reducing total supply current to <1µA. VL must be ≤ VCC for valid operation, and all logic thresholds are rail-relative (e.g., VIHL = VL – 0.2V).

Key Specifications

Pinout & Package

MAX3371ELT+T is housed in a 1mm × 1.5mm, 0.5mm pitch, 6-pin µDFN package with wettable flanks, optimized for space-constrained portable designs and reflow-compatible assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXS0102DCUR and SN74AVC4T245PW, the MAX3371ELT+T uniquely combines true bidirectionality without direction control, integrated pull-ups, and sub-1µA shutdown - making it optimal for space- and power-constrained I²C/SPI bridges where simplicity and ultra-low standby current are critical.

Availability

MAX3371ELT+T is available at Aetrix Electronics and suitable for portable POS systems, smart card readers, and I²C/SPI interface bridging requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MAX3371ELT+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) designs precision analog, mixed-signal, and power management ICs for industrial, medical, communications, and consumer applications.

The MAX337x family targets low-voltage interface bridging in battery-powered and space-constrained systems - delivering rail-to-rail bidirectional translation with minimal external components and ultra-low shutdown current.

FAQ

What is the maximum allowable voltage difference between VL and VCC for reliable operation of the MAX3371ELT+T?

The MAX3371ELT+T requires VL ≤ VCC for correct functionality; the datasheet explicitly states "VL must always be less than or equal to VCC." Violating this condition risks undefined logic thresholds and potential damage. No maximum differential is specified beyond that constraint - typical use cases maintain VL at 1.6V–3.3V and VCC at 3.3V–5.5V.

Does the MAX3371ELT+T require external pull-up resistors when used in I²C applications?

No, the MAX3371ELT+T includes internal 10kΩ pull-up resistors on both I/O VL and I/O VCC pins, eliminating the need for external resistors in standard I²C implementations. This simplifies board layout and ensures consistent bus termination - confirmed in the "Detailed Description" and "Applications Information" sections of the datasheet.

How does the speed-up circuit in the MAX3371ELT+T improve timing performance?

When triggered during a low-to-high transition, the MAX3371ELT+T's speed-up circuit activates internal switches for 320ns to actively pull up I/O VL and I/O VCC, reducing rise time and propagation delay. This results in measured tPD-VL-LH of 50ns (10pF), significantly faster than passive resistor-based translators - directly enabling 2Mbps operation.

Can the MAX3371ELT+T translate signals between a 1.2V domain and a 3.3V domain?

No - the MAX3371ELT+T specifies a minimum VL of +1.6V. Operation below 1.6V is not characterized or guaranteed. For 1.2V interfaces, alternative translators such as the TXB0102 or ADG3308 would be required, as the MAX3371ELT+T's input thresholds (e.g., VILL = 0.15V) and internal circuitry are not validated below 1.6V VL.

What happens to the I/O pins of the MAX3371ELT+T during shutdown mode?

When SHDN is driven low, the MAX3371ELT+T disconnects its internal 10kΩ pull-up resistors and places both I/O VL and I/O VCC pins in a high-impedance state with leakage <1µA. This allows other devices on the same bus to drive the lines freely - a key feature for multidrop I²C or shared SPI configurations.