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Texas Instruments SN74LVC126ANS
- Part No.:
- SN74LVC126ANS
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74LVC126ANS.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:26,350
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Product details
Overview
SN74LVC126ANS from NXP Semiconductors is a quad non-inverting 3-state buffer/line driver with 5 V tolerant inputs and outputs, operating from 1.2 V to 3.6 V supply, supporting −40 °C to +125 °C ambient range, and delivering 24 mA output drive at 3.0 V - used for bidirectional bus interfacing between mixed-voltage logic domains in industrial control backplanes.
For engineers reviewing the SN74LVC126ANS datasheet, SN74LVC126ANS pinout, SN74LVC126ANS application, or SN74LVC126ANS equivalent, key selection criteria include 5 V tolerance on I/O pins, 3-state enable timing (ten ≤ 7.5 ns at 3.6 V), low ICC (≤40 µA), and SO14 package compatibility with legacy 74-series footprints.
Technical Context
This device implements four independent non-inverting buffers, each with active-HIGH output enable (nOE). Each channel transitions to high-impedance when nOE is LOW, enabling shared-bus operation without external pull-ups or direction control logic.
It supports mixed-voltage system interfacing: 3.3 V core logic can safely drive and read 5 V signals due to 5 V tolerant I/Os, while maintaining CMOS-level thresholds compliant with JEDEC JESD8-7A, JESD8-5A, and JESD8-C standards across 1.65–3.6 V supply ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 1.2 V to 3.6 V - enables direct integration into 1.8 V, 2.5 V, and 3.3 V systems without level shifters. |
| I/O voltage tolerance | Up to 5.5 V - allows safe connection to 5 V buses while powered from lower supply, eliminating external clamping diodes. |
| Output drive strength | ±24 mA at VCC = 3.0 V - sufficient to drive 50 Ω transmission lines or multiple TTL loads without buffering. |
| Propagation delay | 1.0–4.7 ns (VCC = 3.0–3.6 V) - supports >100 MHz data rates in point-to-point or lightly loaded bus configurations. |
| Enable/disable time | ten ≤ 7.5 ns, tdis ≤ 7.5 ns (VCC = 3.0–3.6 V) - ensures fast bus arbitration and minimal contention window during state transitions. |
| Operating temperature | −40 °C to +125 °C - qualified for under-hood automotive modules, industrial PLC I/O cards, and telecom line cards. |
| ESD protection | HBM >2000 V, CDM >1000 V - meets IEC 61000-4-2 Level 3 requirements for board-level ESD robustness. |
Pinout & Package
SN74LVC126ANS uses the SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, gull-wing leads, and standard JEDEC MS-012 footprint compatible with legacy 74-series layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | nOE (active-HIGH enable) | Independent per-channel 3-state control; LOW forces output to high-Z, enabling bus sharing. |
| 2, 5, 9, 12 | nA (input) | Non-inverting data input; accepts 0–5.5 V regardless of VCC, enabling mixed-voltage signal routing. |
| 3, 6, 8, 11 | nY (output) | Buffered non-inverting output; drives up to ±24 mA and tolerates 5.5 V when disabled. |
| 7 | GND | Ground reference for all logic and I/O; must be low-impedance to minimize ground bounce in multi-channel switching. |
| 14 | VCC | Core supply input; decoupling capacitor (100 nF) required within 10 mm for stable high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| 5 V tolerant I/Os | Enables direct interface between 3.3 V microcontrollers and 5 V peripherals without external level translators. |
| Wide VCC range (1.2–3.6 V) | Supports battery-powered devices down to 1.2 V and industrial systems up to 3.6 V with single-supply simplicity. |
| Low static current (≤40 µA) | Reduces quiescent power in always-on subsystems such as sensor hubs or watchdog interfaces. |
| JEDEC-compliant voltage thresholds | Guarantees interoperability with TTL, LVTTL, and other JEDEC-standard logic families across full temperature range. |
| High-speed enable timing | Sub-8 ns enable/disable ensures clean bus turnarounds in multiplexed memory or address/data bus applications. |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Isolating and buffering address/data lines between 3.3 V MCU and legacy 5 V peripheral ICs on a DIN-rail mounted controller. IC Role / Device Role / Timing Role: Quad non-inverting buffer with per-line 3-state control, enabling dynamic bus ownership handoff between master and slave devices. Use Value: Eliminates need for discrete level shifters and reduces BOM count by 4× compared to single-channel solutions. |
Use Scenario: Driving LIN transceiver enable lines and sensor multiplexer select signals in a 12 V vehicle environment with local 3.3 V regulation. IC Role / Device Role / Timing Role: Voltage-tolerant buffer ensuring reliable logic-level translation despite supply ripple and load dump transients. Use Value: Withstands 5.5 V on outputs during power-down, preventing backfeed into 3.3 V rails and avoiding latch-up risk. |
| Test Equipment Signal Routing | Medical Diagnostic Data Acquisition |
Use Scenario: Multiplexing digital test patterns from FPGA-based pattern generator to multiple DUT channels with independent gating. IC Role / Device Role / Timing Role: Low-skew (<1.5 ns) quad buffer providing synchronized enable-controlled signal distribution. Use Value: Propagation delay matching ensures <1 ns inter-channel skew, critical for parallel bit error rate testing. |
Use Scenario: Isolating ADC serial interface lines (SDO, SCLK) from noisy digital subsystems in portable ultrasound front-ends. IC Role / Device Role / Timing Role: 3-state buffer decoupling sensitive analog domain from digital noise sources during conversion cycles. Use Value: High-impedance OFF-state (IOZ ≤ ±5 µA) prevents loading of ADC output, preserving signal integrity and SNR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buffer/line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC125A | Active-LOW output enable (nOE̅), otherwise identical electrical specs and pinout. | Requires inverted enable logic; not drop-in if existing design uses active-HIGH OE control. | Select when system-level enable signals are active-LOW or when consolidating with other LVC125A-based designs. |
| 74AHC126 | Higher VCC range (2–5.5 V), no 1.2–1.8 V support; slightly higher propagation delay (min 2.5 ns at 5 V). | Better suited for pure 5 V systems; incompatible with sub-2 V logic domains. | Choose only for 5 V-only environments where extended voltage margin outweighs low-voltage flexibility. |
Compared with SN74LVC126ANS, SN74LVC125A offers identical performance but requires OE inversion in firmware/hardware, while 74AHC126 sacrifices low-voltage operation for higher noise immunity and 5 V native compatibility - making SN74LVC126ANS optimal for mixed-voltage, energy-sensitive designs.
Availability
SN74LVC126ANS is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, and medical diagnostic data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC126ANS 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The SN74LVC126ANS belongs to NXP's LVC logic family, designed specifically for low-voltage, high-speed, mixed-signal interfacing in space-constrained and power-sensitive embedded systems.
FAQ
What is the maximum input voltage the SN74LVC126ANS can tolerate on its I/O pins?
The SN74LVC126ANS supports up to 5.5 V on all input and output pins - even when VCC is as low as 1.2 V. This 5 V tolerance allows safe interfacing with legacy 5 V logic without external protection components, and is explicitly guaranteed across the full −40 °C to +125 °C operating range per the NXP datasheet absolute maximum ratings table.
Does the SN74LVC126ANS support operation at 1.8 V supply voltage?
Yes, the SN74LVC126ANS is fully specified for 1.8 V operation: VIH is 0.65 × VCC (1.17 V min), VIL is 0.35 × VCC (0.63 V max), and output drive remains functional at ±8 mA. Static current stays below 10 µA, and propagation delay is 2.8–5.6 ns - confirming robust behavior in 1.8 V FPGA I/O banks and ultra-low-power microcontroller interfaces.
Can the SN74LVC126ANS replace older 74LS126 devices in existing designs?
The SN74LVC126ANS is pin-compatible with 74LS126 in SO14 packaging and provides identical 4-channel non-inverting 3-state functionality. However, it operates at lower voltage (1.2–3.6 V vs. 4.75–5.25 V), draws far less current (<40 µA vs. ~18 mA), and offers 5 V tolerant I/Os - enabling direct drop-in replacement only if the host system can supply ≥1.2 V and does not rely on LS-family current-sinking characteristics.
What is the thermal performance of the SN74LVC126ANS in SO14 package?
In SO14 (SOT108-1) package, the SN74LVC126ANS has a thermal resistance θJA of 110 K/W. At 125 °C ambient and 500 mW total power dissipation limit, junction temperature reaches 182.5 °C - exceeding safe silicon limits. Therefore, derating begins above 70 °C at 8 mW/K; sustained operation above 85 °C requires careful PCB copper area and airflow planning to maintain TJ < 125 °C.
How does the SN74LVC126ANS handle bus contention during enable transitions?
The SN74LVC126ANS minimizes bus contention via fast, matched enable/disable timing: ten and tdis are both ≤7.5 ns at 3.6 V, and output skew between channels is ≤1.5 ns. This tight timing alignment ensures that outputs enter and exit high-Z states synchronously, reducing overlap windows where opposing drivers could simultaneously drive the same net - critical for reliable shared-bus arbitration.
SN74LVC126ANS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
SN74LVC126ANS FAQ
1.How can I place an order for SN74LVC126ANS through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC126ANS 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 SN74LVC126ANS reliable?
The price and inventory of SN74LVC126ANS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC126ANS is usually 5 days.
3.What payment methods are accepted for SN74LVC126ANS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC126ANS transactions.
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4.How is shipping managed for SN74LVC126ANS?
SN74LVC126ANS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC126ANS 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 SN74LVC126ANS?
For technical support, including SN74LVC126ANS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC126ANS requirements.
6.How does Aetrix verify that SN74LVC126ANS is sourced from the original manufacturer or authorized distributors?
All SN74LVC126ANS 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 SN74LVC126ANS meets industry standards.
7.What is the process for return or replacement of SN74LVC126ANS?
All SN74LVC126ANS units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC126ANS, 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 SN74LVC126ANS part is unused and in its original packaging.
Return procedure for SN74LVC126ANS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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