Analog Devices Inc./Maxim Integrated MAX3378EEBC+T

Overview

MAX3378EEBC+T from Maxim Integrated is a quad bidirectional ±15kV ESD-protected logic-level translator enabling voltage translation between 1.2V–5.5V (VL) and 1.65V–5.5V (VCC) domains. It supports guaranteed 8Mbps data rate across full voltage range, offers 1μA three-state supply current, and uses transmission-gate architecture for true bidirectional operation on each of four independent I/O channels - deployed in portable POS systems and smart card readers.

For engineers reviewing the MAX3378EEBC+T datasheet, MAX3378EEBC+T pinout, MAX3378EEBC+T application, or MAX3378EEBC+T equivalent, key selection criteria include bidirectional channel count, guaranteed 8Mbps timing under 15pF load, VL/VCC supply flexibility, ±15kV HBM ESD rating on VCC-side I/Os, and TDFN-14 (3mm × 3mm) package compatibility with high-density PCB layouts.

Technical Context

The MAX3378EEBC+T implements a transmission-gate-based bidirectional level-shifting architecture per channel, allowing seamless signal flow in either direction (VL ↔ VCC) without direction-control pins. Its internal speed-up circuitry - featuring one-shot-triggered pull-up MOSFETs (PU1/PU2) - reduces rise time and propagation delay for low-to-high transitions.

It integrates thermal short-circuit protection that forces automatic entry into three-state mode at +152°C junction temperature and resumes normal operation at +142°C. The device maintains ±15kV Human Body Model ESD protection on all I/O VCC pins under all operating states - powered, three-state, or unpowered - with no latch-up after ESD events.

Key Specifications

Pinout & Package

MAX3378EEBC+T is housed in a 14-pin TDFN-EP (3mm × 3mm) package with exposed pad for thermal management. Pin functions are referenced to VL or VCC supplies and support independent bidirectional translation per channel.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXS0104E and SN74AVC4T245, the MAX3378EEBC+T delivers superior system-level robustness via integrated ±15kV HBM ESD and autonomous thermal shutdown - reducing qualification risk in consumer and industrial portable equipment without sacrificing 8Mbps throughput or quad-channel density.

Availability

MAX3378EEBC+T is available at Aetrix Electronics and suitable for portable POS systems, smart card readers, and cell-phone cradles requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MAX3378EEBC+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, communications, and consumer applications.

The MAX3372E–MAX3379E family was engineered specifically for robust, low-power bidirectional voltage translation in battery-operated and ESD-exposed portable electronics - prioritizing supply flexibility, integrated protection, and timing predictability over raw speed.

FAQ

What is the maximum data rate supported by the MAX3378EEBC+T under typical conditions?

The MAX3378EEBC+T guarantees 8Mbps operation across its full specified VL/VCC voltage range (1.2V ≤ VL ≤ VCC ≤ 5.5V) with 15pF capacitive load. Within narrower voltage windows - such as +1.8V ≤ VL ≤ VCC ≤ +2.5V or +2.5V ≤ VL ≤ VCC ≤ +3.3V - it achieves up to 16Mbps. These higher rates are validated in the Timing Characteristics table and require proper layout and termination to maintain signal integrity. The MAX3378EEBC+T does not guarantee 16Mbps across the entire voltage range.

Does the MAX3378EEBC+T require external direction-control signals?

No, the MAX3378EEBC+T uses a transmission-gate architecture that enables true bidirectional translation on each of its four independent I/O channels without any direction-control pins. Signal flow adapts automatically based on relative voltage levels and edge transitions between VL and VCC domains. This eliminates timing-critical control logic and simplifies PCB routing - a key advantage over transceivers like SN74AVC4T245 which require explicit DIR pin management.

How does the three-state mode function on the MAX3378EEBC+T?

The MAX3378EEBC+T enters three-state mode when the THREE-STATE pin is pulled low (logic low referenced to VL). In this mode, all eight I/O lines (I/O VL1–I/O VL4 and I/O VCC1–I/O VCC4) become high-impedance, and total supply current drops below 1μA. This allows safe multidrop bus configurations and ultra-low-power standby. The internal 10kΩ pull-up resistors on I/O lines are disconnected, so external biasing may be needed depending on system topology. The MAX3378EEBC+T remains fully functional upon exit from three-state mode with no reset sequence required.

What ESD protection levels does the MAX3378EEBC+T provide, and on which pins?

The MAX3378EEBC+T provides ±15kV Human Body Model (HBM) ESD protection on all I/O VCC pins (I/O VCC1–I/O VCC4), verified per JEDEC JS-001. It also meets ±8kV IEC 61000-4-2 contact discharge and ±10kV air-gap discharge requirements. Protection is active in all operational states - normal, three-state, and unpowered - and prevents latch-up. I/O VL pins are rated for ±8kV HBM. No external ESD components are required for I/O VCC lines in most portable end-equipment designs.

Can the MAX3378EEBC+T translate between 1.2V and 5V logic domains?

Yes, the MAX3378EEBC+T supports VL from +1.2V to +5.5V and VCC from +1.65V to +5.5V, with the constraint that VL must not exceed (VCC + 0.3V) during steady-state operation. During power-up, VL may transiently exceed VCC by up to 0.3V without damage. This makes the MAX3378EEBC+T suitable for interfacing 1.2V FPGA I/O banks with 5V peripherals - provided VCC is set to ≥1.65V and VL is kept within the allowable offset window. The MAX3378EEBC+T maintains guaranteed 8Mbps timing even at these extreme voltage combinations when load capacitance is ≤15pF.