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Diodes Incorporated LXS0104LEX
- Part No.:
- LXS0104LEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
LXS0104LEX.pdf
- Description:
- LOGIC ULS TSSOP-14 T&R 2.5K
- Quantity:
- Payment:
- Shipping:
Inventory:2,490
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Product details
Overview
LXS0104LEX from Diodes Incorporated is a 4-bit bidirectional auto-sensing level shifter with dual supply rails (VCCA: 1.65–3.6 V, VCCB: 2.3–5.5 V), 24 Mbps push-pull data rate, integrated 10 kΩ pull-up resistors, and no direction-control pin - used for I²C/SMBus voltage translation between low-voltage ASICs and higher-voltage peripherals in mobile and portable electronics.
For engineers reviewing the LXS0104LEX datasheet, LXS0104LEX pinout, LXS0104LEX application, or LXS0104LEX equivalent, key selection criteria include its automatic bidirectional sensing architecture, ultra-low propagation skew (<0.7 ns), OE-controlled 3-state operation, and support for mixed-voltage I/O domains without external biasing or control logic.
Technical Context
The LXS0104LEX implements an NMOS-based bidirectional translation cell per channel, with integrated one-shot rising-edge detectors to accelerate low-to-high transitions on both A and B ports. Its auto-sensing operation eliminates need for direction-control signals by detecting signal flow dynamically via internal voltage comparators.
VCCA must be ≤ VCCB, and power-up sequencing is non-preferential - enabling robust integration into systems with asynchronous rail activation. Each I/O line includes ESD protection (2500 V HBM) and supports open-drain (2 Mbps) or push-pull (up to 24 Mbps) driving modes with configurable rise/fall times dependent on load and supply conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate (Push-Pull) | 24 Mbps max - enables high-speed I²C Fast Mode Plus and MDIO applications |
| A-port Voltage Range | 1.65 V to 3.6 V - compatible with 1.8 V/2.5 V/3.3 V logic domains |
| B-port Voltage Range | 2.3 V to 5.5 V - supports 2.5 V/3.3 V/5 V microcontrollers and peripherals |
| Propagation Skew | <0.7 ns - ensures timing integrity across all 4 channels in parallel bus translation |
| Integrated Pull-ups | 10 kΩ per I/O - eliminates external resistors for I²C/SMBus open-drain termination |
| OE Control Reference | VCCA-referenced - simplifies enable logic when A-side is system controller domain |
| ESD Protection | 2500 V HBM on both A and B ports - meets industrial handling requirements without added protection circuitry |
Pinout & Package
Package: 14-pin TSSOP (L), 3.5 mm × 4.4 mm body, 0.65 mm pitch, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA | Power Supply | A-port reference voltage (1.65–3.6 V); powers internal logic and defines A-side I/O thresholds |
| VCCB | Power Supply | B-port reference voltage (2.3–5.5 V); must be ≥ VCCA; sets B-side output swing and input thresholds |
| A1–A4 | I/O Bidirectional | 4-channel A-side signals referenced to VCCA; auto-sense direction and translate to B-port levels |
| B1–B4 | I/O Bidirectional | 4-channel B-side signals referenced to VCCB; electrically isolated from A-side except during active translation |
| OE | Digital Input | Active-high output enable (VCCA-referenced); drives all I/Os to high-impedance when low |
| GND | Ground Reference | Common return path for both supply domains; required for proper ESD and noise immunity |
| NC | No Connection | Pins 6 and 9 in TSSOP package - must remain unconnected; no internal bonding or function |
Key Features
| Feature | Design Value |
|---|---|
| No direction-control pin required | Reduces PCB routing complexity and eliminates timing-critical control signal synchronization |
| Auto-sensing bidirectional translation | Enables seamless I²C clock/data arbitration without master-side protocol intervention |
| Non-preferential power-up sequencing | Allows independent ramp-up of VCCA and VCCB rails - critical for multi-rail SoC power management |
| Integrated 10 kΩ pull-up resistors | Saves board space and BOM count in I²C/SMBus designs; eliminates external resistor network tuning |
| Low bit-to-bit skew (<0.7 ns) | Maintains signal alignment across 4-bit parallel interfaces like GPIO expanders or sensor buses |
Applications
| I²C Bus Level Translation | SMBus Host-to-Device Interface |
|---|---|
Use Scenario: Interfacing a 1.8 V microcontroller I²C master to a 3.3 V temperature sensor or EEPROM in a smartphone mainboard. IC Role / Device Role / Timing Role: Bidirectional voltage translator ensuring signal integrity across mixed-supply I²C SDA/SCL lines with automatic direction detection. Use Value: Eliminates need for discrete MOSFET translators or direction-control logic, reducing layout area and design validation effort. | Use Scenario: Connecting a 2.5 V baseband processor SMBus controller to 5 V power-management ICs in a tablet platform. IC Role / Device Role / Timing Role: Dual-supply level shifter supporting SMBus 100 kHz/400 kHz timing with guaranteed setup/hold margins at both voltage domains. Use Value: Maintains SMBus compliance while enabling direct communication without level-shifting firmware overhead or external components. |
| MDIO Interface Translation | Low-Voltage ASIC-to-Peripheral Bridge |
Use Scenario: Translating MDIO clock and data between a 1.65 V Ethernet PHY register interface and a 3.3 V MAC controller in a networking SoC module. IC Role / Device Role / Timing Role: High-speed bidirectional translator meeting IEEE 802.3 clause 22 timing requirements with sub-5 ns propagation delay. Use Value: Enables direct MDIO access without PHY-side level-shifting circuitry, preserving signal fidelity and reducing jitter accumulation. | Use Scenario: Bridging a 2.5 V FPGA I/O bank to 5 V industrial sensors or displays in a portable diagnostic device. IC Role / Device Role / Timing Role: Configurable 4-bit translator with OE-controlled isolation, allowing dynamic power gating of peripheral interfaces. Use Value: Provides safe, glitch-free voltage domain separation during hot-plug events or sleep/wake transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TXS0104 | TI part with similar 4-bit auto-sensing architecture but requires minimum 1.65 V on both sides; no integrated pull-ups | Needs external 10 kΩ pull-ups for I²C; less suitable for space-constrained mobile designs | Select if existing TI ecosystem mandates compatibility and board area allows external resistors |
| PCA9306 | Requires external direction-control signal; no auto-sensing; supports only 1.2–3.6 V on both sides | Not usable for true bidirectional protocols like I²C without additional control logic | Choose only for unidirectional or direction-stable applications where control pin availability is guaranteed |
Compared with TXS0104 and PCA9306, the LXS0104LEX delivers fully autonomous bidirectional operation with integrated pull-ups and wider B-port voltage range (up to 5.5 V), making it uniquely suited for mixed-voltage I²C, SMBus, and MDIO bridges in compact portable electronics.
Availability
LXS0104LEX is available at Aetrix Electronics and suitable for I²C bus translation, SMBus host-device interfacing, MDIO communication, and low-voltage ASIC-to-peripheral bridging requiring stable component supply and long-term production continuity.
Supply support for LXS0104LEX 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
Diodes Incorporated is a global semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and connectivity applications.
The LXS0104LEX belongs to Diodes' high-speed level translation product line, designed specifically for space-constrained, low-power portable electronics requiring reliable mixed-voltage I/O interoperability without external control or biasing components.
FAQ
What is the maximum allowable voltage difference between VCCA and VCCB?
VCCA must be less than or equal to VCCB per datasheet specification; no maximum differential voltage is defined, but absolute maximum ratings limit VCCA to ≤4.6 V and VCCB to ≤6.5 V. Operation outside the recommended ranges (1.65–3.6 V for VCCA, 2.3–5.5 V for VCCB) may cause functional failure or reliability degradation.
Can LXS0104LEX be used for SPI communication?
No - LXS0104LEX is not recommended for SPI due to its auto-sensing architecture optimized for open-drain bidirectional protocols like I²C and SMBus. SPI's unidirectional, push-pull nature with separate clock/MOSI/MISO lines risks metastability and undefined state transitions on the translator's bidirectional channels.
Does the OE pin support partial power-down operation?
Yes - asserting OE low places all A/B port I/Os in high-impedance state and disables internal pull-up resistors, reducing total supply current to ≤2 µA. This enables safe isolation during system sleep modes while maintaining power to other subsystems without back-driving risk.
Are the integrated pull-up resistors enabled when OE is low?
No - the integrated 10 kΩ pull-up resistors are disabled when OE is low, ensuring no unintended weak pull-up on isolated I/O lines. This prevents contention or leakage paths during 3-state operation, critical for reliable hot-swap and power-gating scenarios.
LXS0104LEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- -
- Voltage - VCCA:
- 1.65 V ~ 3.6 V
- Voltage - VCCB:
- 2.3 V ~ 5.5 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Open Drain, Push-Pull
- Data Rate:
- 24Mbps
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP (0.173", 4.40mm Width)
LXS0104LEX FAQ
1.How can I place an order for LXS0104LEX through Aetrix?
Please submit a Request for Quotation (RFQ) for LXS0104LEX 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 LXS0104LEX reliable?
The price and inventory of LXS0104LEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LXS0104LEX is usually 5 days.
3.What payment methods are accepted for LXS0104LEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LXS0104LEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LXS0104LEX?
LXS0104LEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LXS0104LEX 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 LXS0104LEX?
For technical support, including LXS0104LEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LXS0104LEX requirements.
6.How does Aetrix verify that LXS0104LEX is sourced from the original manufacturer or authorized distributors?
All LXS0104LEX 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 LXS0104LEX meets industry standards.
7.What is the process for return or replacement of LXS0104LEX?
All LXS0104LEX units undergo pre-shipment inspection (PSI). If there is an issue with LXS0104LEX, 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 LXS0104LEX part is unused and in its original packaging.
Return procedure for LXS0104LEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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