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Analog Devices Inc./Maxim Integrated MAX3391EEUD+T
- Part No.:
- MAX3391EEUD+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
MAX3391EEUD+T.pdf
- Description:
- IC TRANSLATOR UNIDIR 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,915
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Product details
Overview
The MAX3391EEUD+T from Maxim Integrated is a quad unidirectional logic-level translator enabling voltage-domain bridging between low-voltage (VL = +1.2V to +5.5V) and higher-voltage (VCC = +1.65V to +5.5V) digital systems. It supports guaranteed 8Mbps data rate across full voltage range, features ±15kV HBM ESD protection on VCC-side I/Os, 1μA three-state supply current, and operates from -40°C to +85°C. It is used in SPI/I²C interfaces between 1.8V microcontrollers and 3.3V peripherals.
For engineers reviewing the MAX3391EEUD+T datasheet, MAX3391EEUD+T pinout, MAX3391EEUD+T application, or MAX3391EEUD+T equivalent, key selection criteria include bidirectional vs. unidirectional topology, guaranteed 8Mbps timing under 15pF load, VL/VCC supply independence, thermal short-circuit protection, and TSSOP-14 package compatibility with high-density PCB layouts.
Technical Context
The MAX3391EEUD+T implements unidirectional level translation (VL → VCC only) using MOSFET-based pass-gate architecture with integrated speed-up circuitry. It employs edge- and level-sensitive rise-time accelerators on both VL and VCC sides to achieve ≤25ns rise/fall times at +3.3V/+1.8V, enabling 16Mbps operation within constrained voltage domains (+1.8V ≤ VL ≤ VCC ≤ +2.5V or +2.5V ≤ VL ≤ VCC ≤ +3.3V).
Its three-state control input (referenced to VL) disables internal 10kΩ pullups and forces all I/Os into high-impedance mode, reducing total supply current to <1μA. Thermal shutdown activates at +152°C junction temperature and recovers autonomously at +142°C, ensuring robustness during sustained bus contention or short-circuit events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Unidirectional (VL → VCC only); no reverse-path translation capability |
| Data Rate | Guaranteed 8Mbps over full VL/VCC range (+1.2V to +5.5V); up to 16Mbps in +1.8V/+2.5V or +2.5V/+3.3V domains |
| ESD Protection | ±15kV Human Body Model on VCC-side I/O pins; enables direct connection to external connectors without external TVS |
| Supply Current | 130µA typical quiescent (VCC), 16µA typical (VL); drops to <1µA in three-state mode |
| Logic Thresholds | VIHL = VL − 0.2V (VL-side input high), VIHC = VCC − 0.4V (VCC-side input high) |
| Output Drive | VOHL = 0.67×VL (VL-side high), VOHC = 0.67×VCC (VCC-side high); VOL = 0.4V max for both sides at 1mA sink |
| Operating Temp | -40°C to +85°C ambient; validated for industrial and portable equipment environments |
Pinout & Package
The MAX3391EEUD+T is housed in a 14-pin TSSOP package (4.4mm × 5mm, 0.65mm pitch) with exposed thermal pad (EP) connected to GND. Pin 1 is located at top-left corner when notch faces upward.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VL) | Low-voltage supply input | Sets logic thresholds for VL-side I/Os; must be ≥+1.2V and ≤(VCC + 0.3V) |
| 2 (I/O VL1) | VL-referenced data input/output | Unidirectional input from low-voltage source; drives VCC-side output when active |
| 3 (I/O VL2) | VL-referenced data input/output | Second independent VL→VCC channel; electrically isolated from other channels |
| 4 (I/O VL3) | VL-referenced data input/output | Third VL→VCC channel; shares no internal resources with Pins 2 or 3 |
| 5 (I/O VL4) | VL-referenced data input/output | Fourth VL→VCC channel; fully independent; supports 4-channel isolation |
| 6 (GND) | Ground reference | Common return for VL, VCC, and I/O paths; EP must be soldered to this net |
| 7 (THREE-STATE) | Enable control for high-impedance mode | Pull low (≤0.15V) to disable all outputs; referenced to VL logic levels |
| 8 (I/O VCC1) | VCC-referenced data output | Level-shifted output corresponding to Pin 2; sinks/sourced relative to VCC |
| 9 (I/O VCC2) | VCC-referenced data output | Level-shifted output corresponding to Pin 3; no cross-talk with Pin 8 |
| 10 (I/O VCC3) | VCC-referenced data output | Level-shifted output corresponding to Pin 4; maintains timing independence |
| 11 (I/O VCC4) | VCC-referenced data output | Level-shifted output corresponding to Pin 5; supports simultaneous 4-line translation |
| 12 (N.C.) | No connection | Internally unconnected; must remain floating or tied to GND per layout best practice |
| 13 (VCC) | High-voltage supply input | Sets logic thresholds and drive strength for VCC-side I/Os; range +1.65V to +5.5V |
| 14 (EP) | Exposed thermal pad | Must be soldered to solid GND plane for thermal dissipation and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Quad unidirectional channels | Four independent VL→VCC translators in single TSSOP-14; eliminates need for multiple dual-channel ICs |
| Rise-time acceleration | Internal one-shot circuit reduces tR/tF to ≤25ns at +3.3V/+1.8V, enabling 16Mbps in narrow voltage windows |
| Thermal short-circuit protection | Auto-engages three-state mode at +152°C junction temp; resumes operation at +142°C without reset |
| ±15kV HBM ESD on VCC I/Os | Eliminates need for external ESD diodes on host-facing lines (e.g., USB, card slots, external headers) |
| Three-state output control | Single VL-referenced enable pin places all eight I/Os (4 VL + 4 VCC) into high-Z simultaneously |
Applications
| SPI Level Translation | I²C Bus Bridging |
|---|---|
Use Scenario: Interfacing a 1.8V FPGA master to a 3.3V SPI flash memory. IC Role / Device Role / Timing Role: Translates SCLK, MOSI, and MISO signals unidirectionally from 1.8V domain to 3.3V domain while maintaining setup/hold timing integrity. Use Value: Enables direct connection without external level-shifting resistors or discrete MOSFETs; supports 8Mbps clock rates required for fast read operations. | Use Scenario: Connecting a 1.2V sensor node MCU to a 3.3V system management controller via I²C. IC Role / Device Role / Timing Role: Translates SDA and SCL bidirectionally (using two channels per line in push-pull configuration) while preserving open-drain behavior and rise-time compliance. Use Value: Maintains I²C timing budgets (≤300ns fall time at 400kHz) without pull-up resistor recalculations; ±15kV ESD protects exposed board edges. |
| Smart Card Interface | Portable POS Terminal |
Use Scenario: Level-shifting contact interface signals (C6, C7, C8) between 3.3V smart card reader ASIC and 1.8V secure element. IC Role / Device Role / Timing Role: Provides four independent unidirectional paths for VPP, CLK, I/O, and RST signals with precise voltage threshold alignment. Use Value: Guarantees reliable power-on reset sequencing and clock synchronization across voltage domains; thermal protection prevents latch-up during hot-insertion events. | Use Scenario: Bridging 1.8V payment processor SoC to 5V display driver and 3.3V wireless module in handheld terminal. IC Role / Device Role / Timing Role: Translates UART, GPIO, and interrupt lines across three distinct voltage rails using dedicated channel pairs. Use Value: Reduces BOM count by consolidating four voltage-domain crossings into one footprint; 1μA three-state current extends battery life during idle periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TXB0104RUTR | Auto-direction sensing; supports bidirectional translation; 1.2V–3.6V I/O range; no ±15kV ESD rating | Requires no direction-control signal but lacks ESD hardening for external-facing ports | Select when bidirectional operation is needed and ESD protection is handled externally |
| SN74AVC4T245PWR | Configurable VCCA/VCCB supplies; 1.2V–3.6V; 3.5mA IOH/IOL; no integrated thermal protection or ESD beyond standard HBM | Higher drive strength suits capacitive buses but requires external ESD and thermal design margin | Select when driving >20pF loads or needing stronger output drive than MAX3391EEUD+T's 1mA sink |
Compared with TXB0104RUTR and SN74AVC4T245PWR, the MAX3391EEUD+T delivers superior system-level robustness through integrated ±15kV ESD and autonomous thermal shutdown-critical for consumer-facing ports-while trading off auto-direction sensing and higher output current for lower quiescent power and guaranteed 8Mbps timing stability.
Availability
The MAX3391EEUD+T is available at Aetrix Electronics and suitable for SPI/I²C level translation, smart card readers, and portable POS terminals requiring stable component supply, long-term lifecycle support, and guaranteed parametric performance across industrial temperature ranges.
Supply support for MAX3391EEUD+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 semiconductor solutions for industrial, automotive, communications, and computing markets.
The MAX3372E–MAX3379E/MAX3390E–MAX3393E product line targets multivoltage system interoperability, delivering ESD-hardened, low-power, high-speed level translation for portable, battery-powered, and space-constrained applications.
FAQ
What is the maximum guaranteed data rate for the MAX3391EEUD+T across its full operating voltage range?
The MAX3391EEUD+T guarantees 8Mbps operation for all combinations of VL (+1.2V to +5.5V) and VCC (+1.65V to +5.5V), verified with 15pF load and driver impedance ≤50Ω. Higher speeds-up to 16Mbps-are achievable only within specific voltage windows: +1.8V ≤ VL ≤ VCC ≤ +2.5V or +2.5V ≤ VL ≤ VCC ≤ +3.3V, as confirmed in the Timing Characteristics table of the MAX3391EEUD+T datasheet.
Does the MAX3391EEUD+T support bidirectional level translation like the MAX3377E?
No, the MAX3391EEUD+T is strictly unidirectional (VL → VCC only). Unlike the bidirectional MAX3377E, it does not support reverse-path translation (VCC → VL). Its pinout and internal architecture are optimized for single-direction signal flow, making it unsuitable for protocols like I²C without external pull-up configuration and careful timing validation.
How does the three-state function operate on the MAX3391EEUD+T, and what is its electrical impact?
The THREE-STATE pin on the MAX3391EEUD+T is VL-referenced: pulling it low (≤0.15V) disables internal 10kΩ pullups and places all eight I/Os (four VL-side and four VCC-side) into high-impedance state. This reduces total supply current to <1μA, enabling multidrop bus architectures and ultra-low-power sleep modes. The MAX3391EEUD+T datasheet specifies leakage currents ≤1μA in this mode at +25°C.
Can the MAX3391EEUD+T be used with VL = 1.2V and VCC = 5.5V simultaneously?
Yes, the MAX3391EEUD+T explicitly supports VL as low as +1.2V and VCC as high as +5.5V concurrently, provided VL ≤ (VCC + 0.3V)-a condition satisfied here. At this extreme combination, the device maintains 8Mbps timing with appropriate load capacitance (<15pF) and driver strength, though VOHL will be ~0.8V (0.67 × 1.2V) and VOHC ~3.7V (0.67 × 5.5V), requiring compatible receiver thresholds.
What thermal protection mechanism is implemented in the MAX3391EEUD+T, and how does it recover?
The MAX3391EEUD+T integrates thermal short-circuit protection that monitors junction temperature. When TJ reaches +152°C, it forces automatic entry into three-state mode, disabling all outputs. Recovery occurs autonomously when TJ cools to +142°C, restoring normal operation without external intervention or power cycle-confirmed in the MAX3391EEUD+T thermal characteristics section.
MAX3391EEUD+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Translator Type:
- Voltage Level
- Channel Type:
- Unidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 4
- Voltage - VCCA:
- 1.2 V ~ 5.5 V
- Voltage - VCCB:
- 1.65 V ~ 5.5 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Open Drain, Tri-State
- Data Rate:
- 16Mbps
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- Power Supply Decoupling, Thermal-Shutdown Protection
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP (0.173", 4.40mm Width)
MAX3391EEUD+T FAQ
1.How can I place an order for MAX3391EEUD+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX3391EEUD+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX3391EEUD+T reliable?
The price and inventory of MAX3391EEUD+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX3391EEUD+T is usually 5 days.
3.What payment methods are accepted for MAX3391EEUD+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX3391EEUD+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX3391EEUD+T?
MAX3391EEUD+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX3391EEUD+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX3391EEUD+T?
For technical support, including MAX3391EEUD+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX3391EEUD+T requirements.
6.How does Aetrix verify that MAX3391EEUD+T is sourced from the original manufacturer or authorized distributors?
All MAX3391EEUD+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX3391EEUD+T meets industry standards.
7.What is the process for return or replacement of MAX3391EEUD+T?
All MAX3391EEUD+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX3391EEUD+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX3391EEUD+T part is unused and in its original packaging.
Return procedure for MAX3391EEUD+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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