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Analog Devices Inc./Maxim Integrated MAX3379EETD+
- Part No.:
- MAX3379EETD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
MAX3379EETD+.pdf
- Description:
- IC TRANSLATOR UNIDIR 14TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,481
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Product details
Overview
The MAX3379EETD+ 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, delivers ±15kV HBM ESD protection on VCC-side I/Os, operates with 130µA typical supply current, and features three-state output mode reducing current to <1µA - used in portable POS systems and smart card readers for reliable signal integrity.
For engineers reviewing the MAX3379EETD+ datasheet, MAX3379EETD+ pinout, MAX3379EETD+ application, or MAX3379EETD+ equivalent, this page provides verified electrical specifications, package mapping to 14-pin TDFN (3mm × 3mm), confirmed unidirectional VL → VCC translation capability, thermal short-circuit protection behavior, and real-world timing performance at 8/10/16Mbps under defined voltage domains.
Technical Context
The MAX3379EETD+ implements unidirectional level translation (VL → VCC only) using MOSFET-based pass-gate architecture with integrated speed-up circuitry. Its input thresholds are referenced to VL (VIHL = VL − 0.2V, VILL = 0.15V) and VCC (VIHC = VCC − 0.4V, VILC = 0.15V), ensuring robust noise immunity across operating voltages.
It incorporates rise-time accelerators on both VL and VCC sides, enabling 16Mbps operation when VL and VCC satisfy +1.8V ≤ VL ≤ VCC ≤ +2.5V or +2.5V ≤ VL ≤ VCC ≤ +3.3V. Thermal shutdown activates at TJ = +152°C and recovers at +142°C, while THREE-STATE pin (logic-referenced to VL) forces high-impedance I/O states and sub-1µA quiescent draw.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range (VL) | +1.2V to +5.5V - enables interface with 1.2V ASICs, 1.8V FPGAs, and 3.3V microcontrollers without external level-shifting components. |
| Supply Voltage Range (VCC) | +1.65V to +5.5V - supports legacy 5V logic, industrial 3.3V buses, and modern 1.8V–2.5V mixed-signal subsystems. |
| Guaranteed Data Rate | 8Mbps over full voltage range - ensures reliable SPI/MICROWIRE communication in battery-powered devices with capacitive loads ≤15pF. |
| ESD Protection (I/O VCC) | ±15kV HBM - eliminates need for external TVS diodes on VCC-side signal lines in handheld and field-deployed equipment. |
| Three-State Supply Current | <1µA - allows integration into low-power sleep modes of portable electronics without compromising system standby current budget. |
| Propagation Delay | 4ns to 30ns (typ.) - meets timing closure for 8Mbps SPI clock-to-data paths with ≤25pF load and driver impedance ≤50Ω. |
| Channel-to-Channel Skew | 20ns max - maintains signal alignment across all four channels in synchronous interfaces like quad-SPI or parallel sensor buses. |
Pinout & Package
MAX3379EETD+ is packaged in a 14-pin TDFN (3mm × 3mm) with exposed pad, optimized for space-constrained portable designs. Pin functions are electrically isolated per channel and support independent enable control via shared THREE-STATE input.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 14) | High-side supply input | Power rail for VCC-referenced I/Os; must be ≥1.65V and ≤5.5V; decoupling capacitor required for ESD robustness. |
| VL (Pin 3) | Low-side supply input | Reference for VL-side logic thresholds and I/O drive strength; must satisfy VL ≤ VCC + 0.3V during operation. |
| THREE-STATE (Pin 8) | Output disable control | Pull low (≤0.15V) to place all I/Os in high-Z state; logic-high threshold is VL − 0.2V - requires VL-referenced driver. |
| GND (Pin 7) | Common reference | Return path for both supply domains; exposed pad must be soldered to PCB ground plane for thermal and EMI performance. |
| I/O VL1–VL4 (Pins 2,4,5,6) | Low-voltage bidirectional data terminals | Input-only in unidirectional mode (MAX3379E); accept 1.2V–5.5V logic; sink/source 20µA for VOHL/VOLL specs. |
| I/O VCC1–VCC4 (Pins 1,12,11,10) | High-voltage bidirectional data terminals | Output-only in unidirectional mode (MAX3379E); drive 0.67×VCC high / 0.4V low into 1mA load; tolerate up to VCC + 0.3V. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional VL→VCC translation | Eliminates backfeed risk in asymmetric voltage systems - critical for interfacing 1.2V SoCs to 3.3V peripherals without bus contention. |
| Rise-time acceleration circuitry | Reduces tR/tF to ≤25ns at 8Mbps (CL=15pF), enabling clean signal edges without external RC networks or slew-rate controllers. |
| Thermal short-circuit protection | Auto-recovers from overload faults without firmware intervention - enhances reliability in hot-plug or cable-fault scenarios in POS terminals. |
| Sub-1µA three-state mode | Enables dynamic power gating of level-shifter banks in multi-peripheral systems, reducing idle current by >99% versus active operation. |
| 100% production-tested timing | Guarantees 8Mbps operation at TA = +25°C; design-limited 16Mbps achievable in narrow voltage windows (+1.8V–+2.5V or +2.5V–+3.3V). |
Applications
| Smart Card Readers | Portable POS Systems |
|---|---|
Use Scenario: Translating contactless smart card interface signals (ISO/IEC 14443 Type A/B) between 1.8V secure element and 3.3V host MCU. IC Role / Device Role / Timing Role: Unidirectional level shifter converting 1.8V card responses to 3.3V logic levels with <30ns propagation delay to meet ISO timing budgets. Use Value: Enables direct connection without discrete resistors or additional buffers, reducing BOM count and PCB area in compact reader modules. | Use Scenario: Bridging 1.2V barcode scanner IC outputs to 3.3V payment processor UART lines in handheld retail terminals. IC Role / Device Role / Timing Role: Four-channel VL→VCC translator handling simultaneous RS232-level UART, GPIO, and LED control signals. Use Value: Single-chip solution replaces four discrete MOSFET translators, cutting assembly cost and improving ESD resilience on exposed I/O connectors. |
| Cell Phone Cradles | GPS Modules |
Use Scenario: Level-shifting USB UART debug signals from 1.8V baseband processor to 5V cradle host controller during firmware updates. IC Role / Device Role / Timing Role: High-speed unidirectional translator supporting 8Mbps UART bursts with <20ns skew across TX/RX/CTS/RTS lines. Use Value: Maintains full UART throughput without protocol overhead or flow-control latency, accelerating field service diagnostics. | Use Scenario: Interfacing 1.8V GPS baseband IC serial outputs (NMEA 0183) to 3.3V navigation MCU in automotive telematics units. IC Role / Device Role / Timing Role: Quad translator handling GPS PPS, UART TX/RX, and external interrupt lines with synchronized edge timing. Use Value: Ensures precise 1PPS timing alignment (<10ns jitter) and noise-immune NMEA frame reception in electrically noisy vehicle environments. |
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; 3.6V max VCC; no built-in ESD protection beyond 2kV HBM | Requires external ESD diodes for IEC 61000-4-2 compliance; unsuitable for direct board-edge routing | Select when automatic bidirectional detection is needed and system-level ESD protection is already implemented. |
| SN74AVC4T245PW | Bus-hold inputs; 3.6V max VCC; 24mA drive strength; no thermal protection | Higher drive capability but lacks thermal shutdown and ±15kV ESD - demands careful thermal design in enclosed enclosures | Select for high-current 3.3V↔1.8V translation where local heating is managed and ESD is handled at connector level. |
Compared with TXB0104RUTR and SN74AVC4T245PW, the MAX3379EETD+ uniquely combines guaranteed 8Mbps unidirectional translation, ±15kV HBM ESD on VCC I/Os, thermal fault recovery, and sub-1µA three-state current - making it optimal for space- and reliability-critical portable interfaces where external protection or thermal monitoring is impractical.
Availability
MAX3379EETD+ is available at Aetrix Electronics and suitable for portable POS systems, smart card readers, cell phone cradles, and GPS modules requiring stable component supply across extended product lifecycles.
Supply support for MAX3379EETD+ 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 and mixed-signal ICs for industrial, communications, and consumer applications, with emphasis on power efficiency and ruggedness.
The MAX3372E–MAX3379E family was engineered specifically for multivoltage digital interfacing in battery-powered portable electronics, delivering high-speed level translation with integrated ESD hardening and ultra-low-power states.
FAQ
What is the maximum data rate supported by the MAX3379EETD+ under standard operating conditions?
The MAX3379EETD+ guarantees 8Mbps operation across its full specified voltage range (+1.2V ≤ VL ≤ VCC ≤ +5.5V) with CL = 15pF and driver output impedance ≤50Ω. At narrower voltage windows - specifically +1.8V ≤ VL ≤ VCC ≤ +2.5V or +2.5V ≤ VL ≤ VCC ≤ +3.3V - it achieves up to 16Mbps, as confirmed in the Timing Characteristics table of the official datasheet. The MAX3379EETD+ does not support 230kbps mode (reserved for MAX3372E/MAX3377E variants).
Does the MAX3379EETD+ support bidirectional level translation?
No, the MAX3379EETD+ is a unidirectional level translator configured for VL → VCC translation only. Its internal architecture lacks the transmission-gate design used in bidirectional variants like MAX3377E/MAX3378E. Attempting reverse signal flow (VCC → VL) will not produce valid logic levels and may violate absolute maximum ratings if I/O VL pins exceed VL + 0.3V.
How does the THREE-STATE pin function on the MAX3379EETD+?
The THREE-STATE pin on the MAX3379EETD+ is referenced to VL, not VCC. Pulling it low (≤0.15V) places all eight I/O terminals (I/O VL1–VL4 and I/O VCC1–VCC4) into high-impedance state and reduces total supply current to <1µA. For normal operation, connect THREE-STATE to VL (logic-high), not VCC - applying VCC-level voltage risks exceeding the pin's absolute maximum rating of VL + 0.3V.
What package type is used for the MAX3379EETD+ and what are its key mechanical features?
The MAX3379EETD+ uses a 14-pin TDFN package measuring 3mm × 3mm with an exposed thermal pad. This package supports reflow soldering at +260°C and has a lead temperature rating of +300°C for 10 seconds. The exposed pad must be soldered to a PCB ground plane to ensure proper thermal dissipation and EMI suppression - omission degrades both thermal short-circuit protection response and ±15kV ESD performance.
Can the MAX3379EETD+ operate with VL = 1.2V and VCC = 5.5V simultaneously?
Yes, the MAX3379EETD+ supports VL as low as +1.2V and VCC as high as +5.5V simultaneously, provided VL ≤ VCC + 0.3V (which holds true here). At this extreme combination, output high-level voltage on I/O VCC pins is guaranteed to be ≥0.67 × VCC = 3.685V, and output low-level is ≤0.4V - meeting standard 5V TTL logic thresholds. Input thresholds remain VIHC = VCC − 0.4V = 5.1V and VILC = 0.15V, ensuring noise margin in noisy 5V environments.
MAX3379EETD+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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-WFDFN Exposed Pad
MAX3379EETD+ FAQ
1.How can I place an order for MAX3379EETD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX3379EETD+ 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 MAX3379EETD+ reliable?
The price and inventory of MAX3379EETD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX3379EETD+ is usually 5 days.
3.What payment methods are accepted for MAX3379EETD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX3379EETD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX3379EETD+?
MAX3379EETD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX3379EETD+ 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 MAX3379EETD+?
For technical support, including MAX3379EETD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX3379EETD+ requirements.
6.How does Aetrix verify that MAX3379EETD+ is sourced from the original manufacturer or authorized distributors?
All MAX3379EETD+ 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 MAX3379EETD+ meets industry standards.
7.What is the process for return or replacement of MAX3379EETD+?
All MAX3379EETD+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX3379EETD+, 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 MAX3379EETD+ part is unused and in its original packaging.
Return procedure for MAX3379EETD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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