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Nexperia USA Inc. 74LVT126DB,112
- Part No.:
- 74LVT126DB,112
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 14-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74LVT126DB,112.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,782
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Product details
Overview
74LVT126DB,112 from Nexperia is a 3.3 V quad non-inverting buffer with 3-state outputs, designed for bus interface and level translation in mixed-voltage systems. It features bus-hold inputs (eliminating external pull-ups), IOFF partial power-down protection, ±32 mA/±64 mA output drive, and operates from -40 °C to +85 °C. Used in backplane data routing and FPGA I/O expansion where TTL-compatible 3.3 V logic buffering is required.
For engineers reviewing the 74LVT126DB,112 datasheet, 74LVT126DB,112 pinout, 74LVT126DB,112 application, or 74LVT126DB,112 equivalent, key selection criteria include 3-state timing (tPZH ≤ 5.4 ns at 3.3 V), overvoltage-tolerant 5.5 V inputs, bus-hold current specs (IBHL = 75–150 μA), and SO14 package compatibility with legacy PCB footprints.
Technical Context
The 74LVT126DB,112 implements four independent BiCMOS buffer channels, each with dedicated active-low output enable (nOE) control. Its IOFF circuit disables outputs during power-down, blocking backflow current when VCC = 0 V while inputs/outputs remain at up to 4.5 V.
Bus-hold circuitry maintains stable logic states on unused inputs without external resistors, with defined IBHL (75–150 μA LOW) and IBHH (-75 to -150 μA HIGH) currents. Input voltage tolerance extends to 5.5 V, enabling direct interfacing with 5 V systems while powered from 2.7–3.6 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 3.6 V - Ensures stable operation across industrial-grade 3.3 V rails with ±0.3 V margin. |
| Input Voltage Range | 0 V to 5.5 V - Allows direct connection to 5 V TTL buses without level shifters. |
| Output Drive | +64 mA / -32 mA - Supports driving heavy capacitive loads (e.g., >50 pF) and multiple CMOS/TTL inputs. |
| Propagation Delay | tPLH/tPHL ≤ 3.9 ns at 3.3 V - Enables reliable operation in high-speed digital interfaces up to ~100 MHz. |
| IOFF Leakage | ±100 μA at VCC = 0 V - Prevents damaging back-current during hot-swap or partial power-down sequences. |
| Bus-Hold Current | IBHL = 75–150 μA at VI = 0.8 V - Holds floating inputs at valid LOW without external components. |
| Operating Temperature | -40 °C to +85 °C - Qualified for industrial ambient environments without derating. |
Pinout & Package
74LVT126DB,112 is supplied in SO14 (SOT108-1) package: plastic small outline, 14-lead, 3.9 mm body width, 1.27 mm lead pitch. Pin 1 index located at top-left corner with beveled edge.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | nOE (active-low output enable) | Independent per-channel control: LOW enables output; HIGH forces high-impedance state. |
| 2, 5, 9, 12 | nA (data input) | Non-inverting input for corresponding buffer channel; accepts 0–5.5 V logic levels. |
| 3, 6, 8, 11 | nY (data output) | Buffered non-inverting output; drives loads up to +64 mA (sink) or -32 mA (source). |
| 7 | GND | Ground reference for all internal circuitry and I/O; must be low-impedance connection. |
| 14 | VCC | Primary supply rail (2.7–3.6 V); powers all buffers and IOFF protection circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Bus-hold inputs | Eliminates need for 10 kΩ external pull-up/pull-down resistors on unused inputs, reducing BOM count and board space. |
| IOFF partial power-down | Disables outputs and blocks back-current when VCC = 0 V, enabling safe live insertion/extraction in modular systems. |
| Overvoltage-tolerant inputs | Withstands 5.5 V input signals while powered from 3.3 V, enabling seamless 5 V ↔ 3.3 V domain bridging. |
| BiCMOS output stage | Delivers TTL-compatible drive strength (+64 mA sink, -32 mA source) with CMOS-level static power consumption. |
| Power-up 3-state | Outputs remain in high-impedance state until VCC stabilizes, preventing bus contention during power sequencing. |
Applications
| Backplane Data Routing | FPGA I/O Expansion |
|---|---|
|
Use Scenario: Isolating and buffering address/data lines between CPU and peripheral cards in modular industrial backplanes. IC Role / Device Role / Timing Role: Quad buffer providing direction-controlled signal isolation with 3-state control per lane to prevent bus conflicts. Use Value: Eliminates need for discrete pull-ups on unterminated slots and ensures clean signal integrity across 15 cm traces at 50 MHz. |
Use Scenario: Extending FPGA GPIO banks to drive off-board peripherals such as displays, sensors, and communication modules. IC Role / Device Role / Timing Role: Level-translating buffer translating 3.3 V FPGA outputs to 5 V-tolerant loads while maintaining sub-4 ns propagation delay. Use Value: Enables direct connection to 5 V UART transceivers and LCD controllers without external level shifters or resistive dividers. |
| Legacy System Interface | Hot-Swappable Module Control |
|
Use Scenario: Interfacing modern microcontrollers with legacy 5 V TTL peripherals like EPROM programmers and parallel port devices. IC Role / Device Role / Timing Role: Bidirectional voltage-tolerant buffer allowing 3.3 V MCU to safely drive and read 5 V logic signals. Use Value: Prevents damage from 5 V inputs during MCU reset and eliminates risk of latch-up due to input overvoltage. |
Use Scenario: Enabling safe insertion/removal of daughterboards in telecom line cards without powering down the main chassis. IC Role / Device Role / Timing Role: IOFF-enabled buffer isolating module I/O from backplane during insertion, suppressing backfeed current. Use Value: Reduces insertion surge current by >95% compared to standard buffers, meeting GR-63-CORE hot-swap requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC126APWR | Lower drive (±24 mA), narrower VCC range (1.65–3.6 V), no bus-hold or IOFF. | Suitable only for low-capacitance, fully powered systems; not for hot-swap or 5 V-tolerant use. | Select if cost-sensitive and 5 V tolerance/IOFF are unnecessary. |
| 74ALVC126PW,118 | Same SO14 package; identical 5.5 V input tolerance but lacks bus-hold; IOFF present. | Requires external pull-ups on unused inputs; otherwise matches timing and drive specs closely. | Choose when bus-hold is not needed and legacy footprint reuse is critical. |
Compared with SN74LVC126APWR, 74LVT126DB,112 delivers higher drive strength and robust 5 V tolerance; versus 74ALVC126PW,118, it adds bus-hold functionality-reducing external components and improving noise immunity on unterminated lines.
Availability
74LVT126DB,112 is available at Aetrix Electronics and suitable for industrial backplane routing, FPGA I/O expansion, legacy system interfacing, and hot-swappable module control requiring stable component supply across extended temperature ranges.
Supply support for 74LVT126DB,112 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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions for industrial, automotive, and computing markets.
The 74LVT series targets high-speed, mixed-voltage bus interface applications where 3.3 V operation, 5 V tolerance, and robust power-down behavior are essential.
FAQ
What is the maximum input voltage the 74LVT126DB,112 can tolerate?
The 74LVT126DB,112 supports input voltages up to +5.5 V regardless of VCC level, verified per Table 4 limiting values. This allows direct interfacing with 5 V TTL systems while operating from a 3.3 V supply, without external clamping or level-shifting circuitry.
Does the 74LVT126DB,112 require external pull-up resistors on unused inputs?
No. The device integrates bus-hold circuitry on all data inputs (1A–4A), providing active LOW and HIGH hold currents (IBHL = 75–150 μA, IBHH = −75 to −150 μA). This maintains valid logic states on floating inputs without external components, reducing BOM and layout complexity.
Can the 74LVT126DB,112 be used during live insertion of a board?
Yes. Its IOFF circuitry actively disables outputs and limits power-off leakage to ±100 μA when VCC = 0 V, preventing damaging back-current flow from live backplane traces into the unpowered IC. This meets requirements for safe hot-swap in modular systems.
What is the typical propagation delay for the 74LVT126DB,112 at 3.3 V?
At VCC = 3.3 V and Tamb = 25 °C, typical propagation delays are tPLH = 2.3 ns and tPHL = 2.4 ns (input-to-output), and tPZH = 3.6 ns (enable-to-HIGH). These values are confirmed in Table 7 and support reliable operation in digital systems with clock periods ≥ 8 ns.
74LVT126DB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LVT
- Package/Case:
- 14-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SSOP
74LVT126DB,112 FAQ
1.How can I place an order for 74LVT126DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVT126DB,112 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 74LVT126DB,112 reliable?
The price and inventory of 74LVT126DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT126DB,112 is usually 5 days.
3.What payment methods are accepted for 74LVT126DB,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT126DB,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVT126DB,112?
74LVT126DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVT126DB,112 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 74LVT126DB,112?
For technical support, including 74LVT126DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT126DB,112 requirements.
6.How does Aetrix verify that 74LVT126DB,112 is sourced from the original manufacturer or authorized distributors?
All 74LVT126DB,112 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 74LVT126DB,112 meets industry standards.
7.What is the process for return or replacement of 74LVT126DB,112?
All 74LVT126DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT126DB,112, 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 74LVT126DB,112 part is unused and in its original packaging.
Return procedure for 74LVT126DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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