MAX3391EEUD+T

Translators, Level Shifters Overview

The MAX3391EEUD+T is a quad, unidirectional low-voltage level translator manufactured by Analog Devices (Maxim Integrated). It operates with VCC supply voltages from +1.65V to +5.5V and VL supply voltages from +1.2V to +5.5V. The device supports data rates up to 8Mbps across the full voltage range, reaching 10Mbps within specific domains (+1.2V ≤ VL ≤ VCC ≤ +3.3V) and 16Mbps in tighter ranges (+1.8V ≤ VL ≤ VCC ≤ +2.5V or +2.5V ≤ VL ≤ VCC ≤ +3.3V). It features ±15kV ESD protection on I/O VCC lines, thermal short-circuit protection, and a three-state output mode reducing quiescent current to less than 1μA. Packaged in a 14-pin TSSOP.

Translators, Level Shifters Feature Summary

• Provides unidirectional level shifting between low-voltage logic systems and higher-voltage systems using externally applied VCC and VL voltages.
• Includes internal rise-time accelerators that reduce propagation delay and enable high-speed operation up to 16Mbps depending on voltage domains.
• Features a three-state output mode that disconnects internal pullup resistors to achieve ultra-low standby current for multidrop network applications.
• Incorporates robust protection mechanisms including ±15kV ESD tolerance on VCC lines and thermal shutdown circuitry to prevent damage during fault conditions.

Translators, Level Shifters Applications

• SPI, MICROWIRE, and I2C Level Translation
• Low-Voltage ASIC Level Translation
• Smart Card Readers
• Portable POS Systems

Translators, Level Shifters Procurement Notes

Verify the exact part number against official manufacturer documentation to ensure compatibility with the specified 14-pin TSSOP package and electrical characteristics. Confirm that the unidirectional functionality aligns with system requirements, as bidirectional variants exist within the same family. Check for any specific ordering suffixes that may indicate different packaging or temperature grades. Ensure design margins account for the specified operating temperature range of -40°C to +85°C.

Translators, Level Shifters Selection Notes

Select this component when interfacing between disparate voltage domains such as 1.2V/1.8V logic and 3.3V/5V systems. The quad configuration allows translation of four independent data lines simultaneously. Consider the guaranteed data rate requirements; while 8Mbps is standard, higher speeds are achievable in lower voltage ranges. The unidirectional nature simplifies design compared to bidirectional translators if signal flow is strictly one-way. Evaluate the need for three-state control if bus sharing is required.

Translators, Level Shifters Part Context

This device belongs to the MAX3372E–MAX3379E and MAX3390E–MAX3393E family of ESD-protected level translators. It shares core architectural features with other members, such as the MAX3390E and MAX3393E, differing primarily in channel count and directionality. The MAX3391E specifically denotes the quad, unidirectional variant designed for high-density board layouts requiring multiple simultaneous translations.

Translators, Level Shifters Replacement Considerations

The MAX3390EEUD+T and MAX3393EEUD+T are related parts within the same family offering similar voltage translation capabilities. Verify pinout compatibility and functional directionality (unidirectional vs. bidirectional) before substitution. Other family members like the MAX3377E offer bidirectional options but may have different speed characteristics or package constraints.