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Analog Devices Inc./Maxim Integrated MAX3379EEUD+
- Part No.:
- MAX3379EEUD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
MAX3379EEUD+.pdf
- Description:
- IC TRANSLATOR UNIDIR 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:771
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Product details
Overview
MAX3379EEUD+ 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 engineers reviewing the MAX3379EEUD+ datasheet, MAX3379EEUD+ pinout, MAX3379EEUD+ application, or MAX3379EEUD+ equivalent, key selection criteria include its unidirectional VL→VCC translation direction, 14-pin TSSOP package compatibility, slew-rate-limited 8Mbps timing performance, thermal short-circuit protection, and support for mixed-voltage SPI/I²C interfaces without level-shifting discretes.
Technical Context
The MAX3379EEUD+ 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 active rise-time acceleration on both VL and VCC sides, enabling up to 16Mbps operation under specific voltage conditions (+1.8V ≤ VL ≤ VCC ≤ +2.5V or +2.5V ≤ VL ≤ VCC ≤ +3.3V). Three-state control is VL-referenced, and thermal shutdown activates at TJ = +152°C to force high-impedance output state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Translation Direction | Unidirectional VL → VCC only; prevents back-driving and simplifies signal routing in master-slave interfaces. |
| Max Data Rate | 8Mbps guaranteed over full VL/VCC range (+1.2V to +5.5V); 16Mbps achievable in +1.8V/+2.5V or +2.5V/+3.3V domains. |
| ESD Protection | ±15kV Human Body Model on VCC-side I/O pins; eliminates need for external TVS diodes in handheld device designs. |
| Supply Current | 130µA typical from VCC, 16µA typical from VL; enables battery-powered operation with minimal quiescent drain. |
| Three-State Current | <1µA total supply current when THREE-STATE pin pulled low; supports multidrop bus architectures. |
| Operating Temp | −40°C to +85°C industrial range; validated for embedded portable electronics and telecom equipment. |
| Propagation Delay | 4ns to 30ns (typ) depending on voltage domain and load; ensures timing compliance in 8MHz SPI and fast I²C systems. |
Pinout & Package
The MAX3379EEUD+ is housed in a 14-pin TSSOP package (4.4mm × 5mm, 0.65mm pitch) with exposed pad for thermal enhancement. Pin 1 is marked by a dot; EP must be soldered to GND for optimal thermal performance and EMI suppression.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VL) | Low-voltage logic supply | Reference for VL-side I/O thresholds and THREE-STATE logic; must be ≥ +1.2V and ≤ (VCC + 0.3V). |
| 2 (I/O VL1) | VL-side bidirectional data terminal | Input when driving VL→VCC; high-impedance when THREE-STATE active; max voltage = VL + 0.3V. |
| 3 (I/O VL2) | VL-side bidirectional data terminal | Same electrical behavior as Pin 2; supports independent channel-level control in quad configuration. |
| 4 (I/O VL3) | VL-side bidirectional data terminal | Third VL-referenced I/O; enables simultaneous translation of four low-voltage signals. |
| 5 (I/O VL4) | VL-side bidirectional data terminal | Fourth VL-referenced I/O; allows full quad-channel interface without external multiplexing. |
| 6 (GND) | Ground reference | Common return for VL, VCC, and all I/O paths; must be low-impedance connection to minimize ground bounce. |
| 7 (THREE-STATE) | Output enable control | Pull low (≤ 0.15V) to enter high-Z mode; pull to VL for normal operation; VL-referenced logic threshold. |
| 8 (I/O VCC1) | VCC-side unidirectional output | Driven high/low by internal pass gate; output voltage swing = 0.67×VCC (high) / ≤0.4V (low) at 1mA sink. |
| 9 (I/O VCC2) | VCC-side unidirectional output | Second VCC-referenced output; electrically isolated from other channels; supports parallel bus expansion. |
| 10 (I/O VCC3) | VCC-side unidirectional output | Third VCC-referenced output; maintains same VOH/VOL specs as Pins 8–9 under identical load conditions. |
| 11 (I/O VCC4) | VCC-side unidirectional output | Fourth VCC-referenced output; enables full 4-bit data path translation without external buffers. |
| 12 (N.C.) | No connection | Not internally bonded; must remain floating or tied to GND per layout best practices. |
| 13 (VCC) | High-voltage logic supply | Reference for VCC-side I/O thresholds; range +1.65V to +5.5V; requires local 1µF decoupling to GND. |
| 14 (N.C.) | No connection | Not internally bonded; no electrical function; leave unconnected. |
Key Features
| Feature | Design Value |
|---|---|
| Quad unidirectional translation | Four independent VL→VCC channels in single 14-pin TSSOP; reduces board space vs. discrete solutions. |
| Rise-time acceleration | Internal one-shot circuitry cuts tRVCC/tRVL by >50% at 8Mbps, enabling clean edges into 15pF loads without external termination. |
| Thermal short-circuit protection | Automatic entry into three-state mode at TJ = +152°C; prevents latch-up and enables self-recovery after fault clearance. |
| ±15kV HBM ESD on VCC I/Os | Validated protection level eliminates need for external ESD components on host-facing signal lines. |
| 1μA three-state supply current | Enables true bus isolation in shared-data-path systems (e.g., multi-peripheral I²C buses) with negligible standby power penalty. |
Applications
| SPI Level Translation | I²C Level Translation |
|---|---|
Use Scenario: Interfacing a +1.8V FPGA SPI controller to a +3.3V ADC or flash memory. IC Role / Device Role / Timing Role: Unidirectional level shifter for SCLK, MOSI, and chip-select signals; preserves setup/hold timing with sub-30ns propagation delay. Use Value: Eliminates risk of overvoltage damage to low-Vt FPGA outputs while maintaining full 8Mbps SPI throughput. | Use Scenario: Connecting a +1.2V microcontroller to +3.3V temperature sensor or EEPROM on shared I²C bus. IC Role / Device Role / Timing Role: Bidirectional-capable translator (via external pull-ups) supporting open-drain I²C signaling with 500kbps capability. Use Value: Enables mixed-voltage I²C without bus contention; leverages internal slew-rate limiting to meet I²C EMI requirements. |
| Smart Card Reader Interface | Portable POS System |
Use Scenario: Translating ISO 7816-3 compliant +5V smart card signals to +3.3V or +1.8V secure MCU. IC Role / Device Role / Timing Role: High-reliability level shifter with ±15kV ESD protection on card-facing VCC I/Os to survive insertion/removal events. Use Value: Meets EN 61000-4-2 Level 4 contact discharge requirement without added protection circuitry. | Use Scenario: Integrating +1.2V barcode scanner ASIC with +5V display driver and USB PHY in handheld payment terminal. IC Role / Device Role / Timing Role: Quad-channel translator handling four independent data paths (e.g., UART, GPIO, reset, interrupt) across voltage domains. Use Value: Reduces BOM count by replacing four discrete translators; supports hot-plug detection via THREE-STATE pin control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TXB0104PWR | Auto-direction sensing; 4-channel bidirectional; 1.2V–3.6V VL/VCC range; no thermal shutdown. | Preferred for I²C/SMBus where bidirectionality is mandatory; unsuitable for high-ESD environments due to lower ±4kV HBM rating. | Select when automatic direction control is required and ESD stress is below ±8kV; verify timing margins for 8Mbps SPI. |
| SN74AVCH4T245PW | 4-bit bus transceiver with configurable direction control; 1.2V–3.6V; 3.5mA drive strength; no integrated ESD beyond standard HBM. | Better suited for high-drive applications (e.g., driving long traces); lacks ±15kV protection and thermal shutdown. | Choose for high-current digital buses where external ESD protection is already implemented and thermal fault tolerance is not critical. |
Compared with TXB0104PWR and SN74AVCH4T245PW, the MAX3379EEUD+ provides superior ESD robustness and thermal safety for portable consumer devices, while trading off auto-direction sensing and higher drive strength - making it optimal for fixed-direction, high-reliability interfaces.
Availability
MAX3379EEUD+ is available at Aetrix Electronics and suitable for portable POS systems, smart card readers, and handheld communication devices requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX3379EEUD+ 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, automotive, and communications markets.
The MAX3372E–MAX3379E family targets multivoltage system interoperability, delivering robust, ESD-hardened level translation for portable and battery-powered electronics where reliability and low quiescent power are critical.
FAQ
What voltage ranges does the MAX3379EEUD+ support on VL and VCC supplies?
The MAX3379EEUD+ accepts VL from +1.2V to +5.5V and VCC from +1.65V to +5.5V. Operation requires VL ≤ (VCC + 0.3V); during power-up, VL may temporarily exceed this limit without damage. The MAX3379EEUD+ is specified for full functionality across this range, including 8Mbps data rate and ±15kV ESD protection.
Is the MAX3379EEUD+ bidirectional or unidirectional?
The MAX3379EEUD+ is unidirectional: it translates signals from the VL side to the VCC side only (VL → VCC). It does not support reverse translation. This is confirmed in the General Description and Pin Configurations section, which identifies MAX3379E as part of the unidirectional group (alongside MAX3374E/MAX3375E/MAX3376E).
How does the three-state mode function on the MAX3379EEUD+?
Pulling the THREE-STATE pin low (≤ 0.15V) places all I/O VCC_ and I/O VL_ pins in high-impedance state and reduces total supply current to <1µA. The pin is VL-referenced, so it must be driven relative to VL - not VCC or GND alone. In three-state mode, I/O lines float but remain within safe voltage limits (≤ VL + 0.3V on VL side, ≤ VCC + 0.3V on VCC side).
What is the maximum data rate achievable with the MAX3379EEUD+?
The MAX3379EEUD+ guarantees 8Mbps over its full VL/VCC operating range (+1.2V to +5.5V). At narrower voltage combinations - specifically +1.8V ≤ VL ≤ VCC ≤ +2.5V or +2.5V ≤ VL ≤ VCC ≤ +3.3V - it supports up to 16Mbps, as verified in the Timing Characteristics table. Performance depends on capacitive load, driver impedance, and supply voltage stability.
Does the MAX3379EEUD+ include thermal protection?
Yes, the MAX3379EEUD+ integrates thermal short-circuit protection. When junction temperature reaches +152°C, it automatically enters three-state output mode to reduce power dissipation. Normal operation resumes once the die cools to +142°C. This feature is documented in the Thermal Short-Circuit Protection section and applies across all operating conditions.
MAX3379EEUD+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- Packaging:
- Tube
- 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)
MAX3379EEUD+ FAQ
1.How can I place an order for MAX3379EEUD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX3379EEUD+ 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 MAX3379EEUD+ reliable?
The price and inventory of MAX3379EEUD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX3379EEUD+ is usually 5 days.
3.What payment methods are accepted for MAX3379EEUD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX3379EEUD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX3379EEUD+?
MAX3379EEUD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX3379EEUD+ 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 MAX3379EEUD+?
For technical support, including MAX3379EEUD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX3379EEUD+ requirements.
6.How does Aetrix verify that MAX3379EEUD+ is sourced from the original manufacturer or authorized distributors?
All MAX3379EEUD+ 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 MAX3379EEUD+ meets industry standards.
7.What is the process for return or replacement of MAX3379EEUD+?
All MAX3379EEUD+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX3379EEUD+, 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 MAX3379EEUD+ part is unused and in its original packaging.
Return procedure for MAX3379EEUD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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