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Nexperia USA Inc. NXB0108BQX
- Part No.:
- NXB0108BQX
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
NXB0108BQX.pdf
- Description:
- IC TRANSLATOR BIDIR 20DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,823
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Product details
Overview
NXB0108BQX from Nexperia is an 8-bit dual-supply bidirectional voltage-level translating transceiver with auto-direction sensing and 3-state output control. It enables seamless interfacing between 1.2 V–3.6 V (A-side) and 1.65 V–5.5 V (B-side) domains, supports partial power-down via IOFF, and operates across −40 °C to +125 °C. Used in mixed-voltage SoC-to-peripheral communication where automatic direction detection eliminates external control logic.
For engineers reviewing the NXB0108BQX datasheet, NXB0108BQX pinout, NXB0108BQX application, or NXB0108BQX equivalent, key selection criteria include its dual-rail supply flexibility, guaranteed 40 Mbps data rate at 3.3 V/5.0 V, IOFF-enabled safe power sequencing, and DHVQFN20 package thermal performance for space-constrained industrial controllers.
Technical Context
The NXB0108BQX implements edge-triggered auto-direction sensing using internal one-shot circuits per channel-rising edges activate PMOS drivers, falling edges activate NMOS drivers-to accelerate transitions without external direction control. Its I/O architecture features weak static drive (70 Ω typical at 1.2–1.8 V, 40 Ω at 3.3–5.0 V) enabling bus contention tolerance during direction reversal.
IOFF circuitry actively disables outputs when either VCC(A) or VCC(B) drops to GND, limiting backflow current to ±2 μA over full temperature range. Input thresholds track VCCI/2 (0.35VCCI to 0.65VCCI), supporting reliable operation across all supported supply combinations while maintaining <1.0 μs enable/disable timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC(A) Range | 1.2 V to 3.6 V - powers A-side I/Os and OE; sets low-voltage domain compatibility (e.g., 1.2 V FPGA core, 1.8 V memory) |
| VCC(B) Range | 1.65 V to 5.5 V - powers B-side I/Os; enables interface to 3.3 V microcontrollers or 5 V legacy peripherals |
| Data Rate | Up to 110 Mbps - verified at 3.3 V/5.0 V, 25 °C; supports high-speed serial links like SPI or parallel GPIO expansion |
| Propagation Delay | 0.8 ns (min) to 6.5 ns (max) - ensures sub-nanosecond timing margin for 100+ MHz clock domains |
| IOFF Leakage | ±2 μA max at −40 °C to +125 °C - prevents damaging back-current during asymmetric power-down in battery-backed systems |
| ESD Robustness | HBM 15 kV on B-port, 2.5 kV on A-port - sustains handling and board-level ESD events without latch-up |
| Operating Temp | −40 °C to +125 °C - qualified for under-hood automotive ECUs and industrial motor drives |
Pinout & Package
DHVQFN20 (SOT764-1) package: 2.5 × 4.5 × 0.85 mm body, 20-terminal no-lead construction with exposed thermal pad (GND-connected recommended for thermal performance).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A8 | A-side bidirectional I/O | Referenced to VCC(A); accept inputs up to 5.5 V; drive outputs compliant with VCC(A) logic levels |
| B1–B8 | B-side bidirectional I/O | Referenced to VCC(B); tolerate 5.5 V inputs; output swing defined by VCC(B) |
| OE | Output enable (active HIGH) | Active-HIGH control referenced to VCC(A); forces all I/Os into high-impedance state when LOW |
| VCC(A) | A-side supply | Powers A-port logic and OE input; must be ≤ VCC(B) during active operation |
| VCC(B) | B-side supply | Powers B-port logic; enables translation to higher-voltage domains including 5 V |
| GND | Ground reference | Common return for both supplies; thermal pad must be soldered and connected to PCB ground plane |
Key Features
| Feature | Design Value |
|---|---|
| Auto-direction sensing | Eliminates need for external direction-control signal, reducing PCB routing and MCU GPIO count in bidirectional buses |
| Dual independent supply rails | Enables simultaneous connection to disparate voltage domains (e.g., 1.8 V sensor hub ↔ 3.3 V host MCU) without level-shifter ICs |
| IOFF partial power-down | Prevents destructive back-current when one supply is off-critical for hot-swap and battery-save modes |
| High-speed 3-state control | Enable/disable times ≤14.5 ns (OE→A) and ≤8.7 ns (OE→B) support glitch-free bus arbitration in real-time systems |
| Thermally enhanced DHVQFN | 0.85 mm profile with exposed pad delivers 12.9 mW/K derating above 111 °C-suited for sealed industrial enclosures |
Applications
| Industrial PLC I/O Modules | Automotive Body Control Units |
|---|---|
Use Scenario: Interfacing 1.2 V FPGA-based motion controller with 24 V digital I/O expansion cards via isolated 3.3 V logic rails. IC Role / Device Role / Timing Role: Bidirectional voltage translator bridging FPGA I/O banks (1.2 V) and isolated level-shifted GPIO (3.3 V), with auto-direction eliminating FPGA pin overhead. Use Value: Reduces component count by replacing two discrete unidirectional translators; IOFF prevents backfeed during module hot-plug. | Use Scenario: Connecting 1.8 V infotainment SoC to 5 V CAN transceiver and LIN physical layer drivers in vehicle door modules. IC Role / Device Role / Timing Role: Dual-rail transceiver enabling shared data bus between low-power SoC and legacy 5 V automotive peripherals without direction control lines. Use Value: Supports 110 Mbps burst transfers for firmware updates; HBM 15 kV B-port rating withstands automotive ESD pulses. |
| Medical Imaging Sensor Interfaces | Server Baseboard Management Controllers |
Use Scenario: Linking 2.5 V CMOS image sensor array to 3.3 V FPGA image processor in portable ultrasound devices. IC Role / Device Role / Timing Role: High-speed bidirectional translator handling pixel clock-aligned parallel video streams with sub-ns skew control. Use Value: 0.5 ns max output skew ensures pixel data integrity; 125 °C rating supports fanless thermal design. | Use Scenario: Enabling BMC (1.8 V ARM core) to communicate with 5 V SMBus-compatible power management ICs and thermal sensors on server motherboards. IC Role / Device Role / Timing Role: Voltage translator for SMBus sideband signaling, leveraging auto-direction to avoid BMC GPIO allocation for direction control. Use Value: IOFF protection prevents current leakage during BMC sleep states; 5.5 V-tolerant B-port handles SMBus open-drain pull-ups safely. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional voltage translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TXS0108E | Lower max data rate (60 Mbps), no IOFF, 1.65–3.6 V VCCA/VCCB range only | Not suitable for 5 V B-side interfaces or asymmetric power-down scenarios | Select when cost sensitivity outweighs 5 V support and IOFF safety requirements |
| NXS0108 | Open-drain compatible, supports I²C/1-Wire, lower drive strength, 1.65–5.5 V VCCB only | Designed for multi-master open-drain buses; lacks auto-direction edge acceleration | Choose only for I²C/SMBus applications requiring true open-drain behavior |
Compared with TXS0108E and NXS0108, NXB0108BQX uniquely combines 5 V B-port tolerance, IOFF-enabled safe power sequencing, and edge-accelerated auto-direction-making it the sole option for high-speed, mixed-voltage, hot-pluggable industrial and automotive bus interfaces.
Availability
NXB0108BQX is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, medical imaging sensor interfaces, and server baseboard management controllers requiring stable component supply across extended temperature ranges and mixed-voltage interoperability.
Supply support for NXB0108BQX 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
Nexperia is a global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in high-volume applications.
The NXB series targets high-speed bidirectional voltage translation in thermally demanding environments, emphasizing IOFF safety, wide supply flexibility, and minimal board space-designed specifically for next-generation industrial automation and automotive domain controllers.
FAQ
What is the maximum allowable voltage difference between VCC(A) and VCC(B)?
VCC(A) must not exceed VCC(B) during normal operation per datasheet Section 8, but transient overshoot up to VCC(B) + 0.5 V is tolerated. The absolute maximum ratings allow both supplies to reach +6.5 V independently, though functional operation requires VCC(A) ≤ VCC(B) to ensure correct I/O threshold referencing and prevent forward-biasing of internal protection diodes.
Can NXB0108BQX be used in I²C applications?
No-NXB0108BQX is not suitable for I²C due to its push-pull output architecture and minimum 50 kΩ pull-up/pull-down requirement (Section 11.6). Its strong drive conflicts with I²C's open-drain topology and causes bus contention. For I²C, Nexperia specifies NXS0108, which provides true open-drain compatibility and slew-rate control.
How does the auto-direction sensing behave during signal transitions?
Each channel uses independent one-shot circuits that detect rising/falling edges on either A or B ports. A rising edge activates PMOS drivers for fast low-to-high transition; a falling edge activates NMOS drivers for fast high-to-low transition. This occurs within nanoseconds and requires no external clock or control-enabling transparent bidirectional flow even during dynamic bus arbitration.
Is the thermal pad on the DHVQFN20 package electrically connected?
Yes-the exposed thermal pad (terminal 1 index area) is internally connected to GND and must be soldered to a PCB ground plane for optimal thermal performance and EMI suppression. Datasheet Note (1) clarifies that if soldered, the pad must remain floating or connected to GND-Nexperia recommends direct GND connection to achieve the specified 12.9 mW/K derating above 111 °C.
NXB0108BQX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 8
- Voltage - VCCA:
- 1.2 V ~ 3.6 V
- Voltage - VCCB:
- 1.65 V ~ 5.5 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Tri-State
- Data Rate:
- 110Mbps
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-VFQFN Exposed Pad
NXB0108BQX FAQ
1.How can I place an order for NXB0108BQX through Aetrix?
Please submit a Request for Quotation (RFQ) for NXB0108BQX 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 NXB0108BQX reliable?
The price and inventory of NXB0108BQX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NXB0108BQX is usually 5 days.
3.What payment methods are accepted for NXB0108BQX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NXB0108BQX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NXB0108BQX?
NXB0108BQX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NXB0108BQX 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 NXB0108BQX?
For technical support, including NXB0108BQX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NXB0108BQX requirements.
6.How does Aetrix verify that NXB0108BQX is sourced from the original manufacturer or authorized distributors?
All NXB0108BQX 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 NXB0108BQX meets industry standards.
7.What is the process for return or replacement of NXB0108BQX?
All NXB0108BQX units undergo pre-shipment inspection (PSI). If there is an issue with NXB0108BQX, 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 NXB0108BQX part is unused and in its original packaging.
Return procedure for NXB0108BQX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
NXB0108BQX Tags
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