Analog Devices Inc./Maxim Integrated MAX3394EEBL+T

Overview

The MAX3394EEBL+T from Maxim Integrated is a dual-channel bidirectional level translator enabling voltage translation between 1.2V and 5.5V domains without direction control pins. It delivers 10mA sink / 15mA source drive strength per I/O, supports 6Mbps push-pull and 1Mbps open-drain data rates, features ±15kV HBM ESD protection on VCC-side I/Os, and operates across –40°C to +85°C for low-voltage ASIC-to-processor interfacing in portable electronics.

For engineers reviewing the MAX3394EEBL+T datasheet, MAX3394EEBL+T pinout, MAX3394EEBL+T application, or MAX3394EEBL+T equivalent, key selection criteria include guaranteed bidirectional operation with internal pullups, slew-rate enhancement for capacitive bus loads up to 400pF, tri-state enable control, thermal shutdown, and UCSP package compatibility with high-density PCB layouts.

Technical Context

The MAX3394EEBL+T uses transmission-gate architecture with gate-control logic and slew-rate enhancement circuitry to isolate I/O VL_ and I/O VCC_ during logic-high states while connecting them during logic-low transitions. This enables true bidirectional signal flow without external direction signals.

Its internal 10kΩ (typ) pullup resistors on both VL- and VCC-referenced I/O lines support direct interface with open-drain drivers, while MP1/MP2 (15mA source) and MN3/MN4 (10mA sink) MOSFETs accelerate edge transitions-enabling reliable 1Mbps operation even with 4.7kΩ external pullups and 400pF bus capacitance.

Key Specifications

Pinout & Package

The MAX3394EEBL+T is housed in a 9-bump UCSP (Ultra-Compact Silicon Package) measuring 1.5mm × 1.5mm × 0.5mm, with exposed pad connected to GND for thermal and EMI performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TXB0102DSGR and SN74AVC2T244RSWR, the MAX3394EEBL+T uniquely combines guaranteed 1Mbps I²C timing under 400pF load, ±15kV HBM ESD hardening, and thermal shutdown-making it the only option qualified for unbuffered, externally routed I/O in portable consumer electronics.

Availability

The MAX3394EEBL+T is available at Aetrix Electronics and suitable for smartphone baseband interfaces, I²C sensor networks, SPI flash subsystems, and low-power wearable designs requiring stable component supply across extended temperature and ESD-prone environments.

Supply support for MAX3394EEBL+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 high-reliability ICs for automotive, industrial, and communications markets.

The MAX3394E series targets multivoltage system interfacing-specifically enabling robust, low-pin-count level translation between next-generation low-voltage logic and legacy higher-voltage peripherals.

FAQ

What supply voltage ranges does the MAX3394EEBL+T support?

The MAX3394EEBL+T supports V_CC from +1.65V to +5.5V and V_L from +1.2V to V_CC. This allows direct interfacing between 1.2V/1.8V ASICs and 3.3V/5V microcontrollers or peripherals. No power-supply sequencing is required-the device tolerates floating V_L or V_CC during power-up/down without latch-up. The MAX3394EEBL+T maintains full functionality across this range while delivering guaranteed 6Mbps push-pull and 1Mbps open-drain data rates.

Does the MAX3394EEBL+T require external pullup resistors for I²C operation?

No, the MAX3394EEBL+T includes internal 10kΩ (typ) pullup resistors on both V_L- and V_CC-referenced I/O lines, enabling direct I²C interface with open-drain drivers without external components. For 1Mbps I²C with 400pF bus capacitance, external 4.7kΩ pullups may be added to improve rise time-but the MAX3394EEBL+T's slew-rate enhancement ensures timing compliance even without them. The MAX3394EEBL+T's internal pullups reduce BOM count and PCB area in space-constrained designs.

How does the tri-state enable (EN) pin function on the MAX3394EEBL+T?

The EN pin on the MAX3394EEBL+T controls output state: logic high enables bidirectional translation, while logic low forces all I/O lines into high-impedance mode and disables internal pullup resistors. In tri-state mode, V_CC supply current drops to 3μA (typ) and V_L current to 0.7μA (typ), enabling ultra-low-power sleep states. The MAX3394EEBL+T also prevents current flow between I/O domains in this mode-critical for multidrop bus isolation. EN accepts logic thresholds referenced to V_L (VIHE = 0.7×V_L, VILE = 0.3×V_L).

What is the significance of ±15kV ESD protection on the MAX3394EEBL+T?

The ±15kV Human Body Model (HBM) ESD protection on the MAX3394EEBL+T's V_CC-side I/Os meets IEC 61000-4-2 Level 4 requirements for system-level ESD immunity. This eliminates the need for discrete TVS diodes on externally routed signal lines-reducing component count, PCB area, and signal integrity degradation. Unlike competing translators, the MAX3394EEBL+T maintains functionality after ESD events without latch-up, avoiding mandatory power cycling. This robustness is critical for handheld and portable electronics where user-handling ESD is frequent.

Can the MAX3394EEBL+T interface with 1.2V logic while powered by 3.3V on V_CC?

Yes, the MAX3394EEBL+T explicitly supports V_L = +1.2V and V_CC = +3.3V simultaneously-enabling translation between ultra-low-voltage cores (e.g., 1.2V FPGA I/O banks) and 3.3V peripherals. Its input thresholds scale with supply voltages (VIHL = 0.7×V_L, VILL = 0.3×V_L), ensuring noise margins at 1.2V logic levels. The MAX3394EEBL+T guarantees 1Mbps open-drain and 6Mbps push-pull operation across this combination, with propagation delay <600ns and output low voltage <0.25V at 10mA sink-fully compliant with 1.2V logic families.