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Diodes Incorporated 74LVC126AS14-13
- Part No.:
- 74LVC126AS14-13
- Manufacturer:
- Diodes Incorporated
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74LVC126AS14-13.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,396
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Product details
Overview
74LVC126AS14-13 from Diodes Incorporated is a quadruple 3-state buffer IC with independent active-high output enable (OE) control per channel, operating across 1.65V–5.5V supply range, sinking up to 24mA at 3.3V, and supporting 5.5V-tolerant inputs for mixed-voltage level shifting in logic interface circuits.
For engineers reviewing the 74LVC126AS14-13 datasheet, 74LVC126AS14-13 pinout, 74LVC126AS14-13 application, or 74LVC126AS14-13 equivalent, key selection criteria include IOFF-enabled partial power-down isolation, propagation delay ≤4.5ns at 3.3V, SO-14 package thermal resistance (θJA), and voltage translation capability between 1.8V/3.3V/5V domains.
Technical Context
This device implements four non-inverting CMOS buffers, each with dedicated OE input enabling high-impedance (Z) output state when low. Its IOFF circuitry actively disables outputs during VCC = 0V, preventing backflow current in partial-power-down systems.
Input tolerance to 5.5V while powered from as low as 1.65V enables bidirectional voltage translation - e.g., 3.3V microcontroller driving 5V peripherals or 1.8V FPGA interfacing with 3.3V I/O banks - without external level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65V to 5.5V - supports single-rail operation across 1.8V, 2.5V, 3.3V, and 5V logic families |
| Output Drive Strength | 24mA sink at VCC = 3.3V - sufficient to drive standard TTL loads or multiple CMOS inputs |
| Propagation Delay (tpd) | 4.5ns max at VCC = 3.3V - ensures timing-critical signal buffering with minimal latency |
| IOFF Leakage Current | ≤20μA at VCC = 0V - guarantees safe bus isolation during power sequencing or standby |
| Input Voltage Tolerance | Up to 5.5V regardless of VCC - enables robust interfacing with higher-voltage signals without clamping diodes |
| ESD Protection | 2kV HBM, 1kV CDM, 200V MM - exceeds JEDEC standards for handling and board-level reliability |
Pinout & Package
74LVC126AS14-13 is housed in a 14-pin SOIC (SO-14) package with standard 1.27mm pitch, 8.6mm × 3.9mm body, and 1.73mm max height. Thermal resistance θJA is not specified in datasheet but typical for SO-14 on FR-4 with minimum pad layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | 1OE, 2OE, 3OE, 4OE | Active-high output enable - drives corresponding Y output to high-Z when low |
| 2, 5, 9, 12 | 1A, 2A, 3A, 4A | Non-inverting data inputs - accept 0–5.5V regardless of VCC |
| 3, 6, 8, 11 | 1Y, 2Y, 3Y, 4Y | Buffered non-inverting outputs - three-state capable with rail-to-rail swing |
| 7 | GND | Ground reference - must be connected to system common ground plane |
| 14 | VCC | Power supply - supplies internal logic and output drivers; decoupling capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| IOFF Partial Power-Down Support | Enables safe hot-plug and power-gating scenarios by disabling outputs when VCC = 0V |
| 5.5V-Tolerant Inputs | Allows direct connection to 5V signals while operating from 1.8V or 3.3V rails - eliminates discrete level shifters |
| Low Dynamic Power Consumption | ICC ≤ 40μA at 3.6V - reduces quiescent load in battery-powered or thermally constrained designs |
| High ESD Robustness | 2kV HBM rating - improves manufacturing yield and field reliability in handling-sensitive environments |
| CMOS Input Thresholds | VIH = 0.65×VCC min, VIL = 0.35×VCC max - ensures noise margin compatibility across supply voltages |
Applications
| Industrial PLC I/O Modules | Embedded Microcontroller Bus Isolation |
|---|---|
|
Use Scenario: Isolating 3.3V ARM Cortex-M GPIOs from 24V industrial fieldbus transceivers during firmware updates. IC Role / Device Role / Timing Role: Bidirectional 3-state buffer providing controlled signal gating and voltage translation between logic and interface layers. Use Value: IOFF prevents backfeed into unpowered MCU sections; 5.5V-tolerant inputs withstand transient surges on isolated bus lines. |
Use Scenario: Enabling/disabling SPI flash memory access during secure boot sequence in automotive infotainment head units. IC Role / Device Role / Timing Role: Active-high OE-controlled buffer isolating flash data lines from SoC during cryptographic verification phase. Use Value: Propagation delay <4.5ns ensures no timing violation in 20MHz+ SPI clocks; low ICC minimizes boot-time power draw. |
| Server Memory Subsystem Interfacing | Test Equipment Signal Conditioning |
|
Use Scenario: Level-shifting DDR3 address/control signals between 1.5V memory controller and 3.3V PMIC monitoring logic. IC Role / Device Role / Timing Role: Non-inverting voltage translator with rail-compatible output swing and fast enable/disable timing. Use Value: tEN ≤5.5ns and tDIS ≤6.0ns at 3.3V allow precise windowing of memory command windows without skew. |
Use Scenario: Buffering and enabling test pattern generators driving multiple DUT inputs in automated PCB functional testers. IC Role / Device Role / Timing Role: Quad-channel output gate controlling signal delivery to DUT under software-defined test sequences. Use Value: Independent OE pins permit per-channel activation; 24mA drive strength ensures clean edges into 50Ω coaxial loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC126APWR (TI) | Same logic function, identical pinout, but rated for –40°C to +125°C (vs. Diodes' –40°C to +125°C); slightly higher ICC (50μA max) | Identical use in voltage translation and bus isolation; TI part has broader automotive qualification history | Select if AEC-Q100 qualification documentation is mandatory for end equipment |
| 74LVC126AD,118 (Nexperia) | SO-14 package, same electrical specs, but IOFF leakage is 10μA max (vs. Diodes' 20μA); lower Cpd (13.5pF vs. 14.9pF at 3.3V) | Suitable for ultra-low-power portable devices where sub-μA standby leakage matters more than drive strength | Prefer when minimizing dynamic switching power dominates over peak current capability |
Compared with SN74LVC126APWR and 74LVC126AD,118, the 74LVC126AS14-13 offers tighter IOFF leakage control at elevated temperatures, superior 5.5V input tolerance margin, and optimized SO-14 thermal performance for continuous 24mA loading in industrial ambient conditions.
Availability
74LVC126AS14-13 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, embedded microcontroller bus isolation, and server memory subsystem interfacing requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LVC126AS14-13 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, low-power, and mixed-signal solutions for industrial, computing, and consumer markets.
The 74LVC logic family targets cost-sensitive, space-constrained applications requiring wide VCC range, voltage translation, and robust power-down behavior - especially in multi-rail embedded systems and infrastructure equipment.
FAQ
Can 74LVC126AS14-13 operate with VCC = 1.65V while receiving 3.3V inputs?
Yes. The device's inputs are explicitly rated for 0–5.5V regardless of VCC, including at the minimum 1.65V supply. This allows reliable 3.3V-to-1.65V level down-shifting without external components, provided VIH/VIL thresholds remain met per datasheet tables.
What happens to outputs when VCC = 0V and OE is high?
When VCC = 0V and OE is driven high, the IOFF circuit forces all outputs into high-impedance state with leakage ≤20μA. This prevents reverse current flow from powered downstream circuits into the unpowered IC, satisfying IEC 61000-4-2 and JEDEC JESD78 latch-up immunity requirements.
Is SO-14 footprint compatible with TSSOP-14 for drop-in replacement?
No. SO-14 and TSSOP-14 have different pad layouts, body dimensions (SO-14: 8.6×3.9mm; TSSOP-14: 5.1×4.5mm), and lead pitch (1.27mm vs. 0.65mm). PCB redesign is required to switch packages; refer to Diodes' suggested pad layouts for each.
Does 74LVC126AS14-13 support hot-swap insertion into live backplanes?
It supports controlled hot-swap via IOFF: when VCC ramps up, outputs remain disabled until OE is asserted after power stabilization. However, it lacks dedicated hot-swap controllers or slew-rate limiting; external RC networks on OE may be needed for sequenced enable timing in high-capacitance backplane environments.
74LVC126AS14-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 74LVC
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
74LVC126AS14-13 FAQ
1.How can I place an order for 74LVC126AS14-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC126AS14-13 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 74LVC126AS14-13 reliable?
The price and inventory of 74LVC126AS14-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC126AS14-13 is usually 5 days.
3.What payment methods are accepted for 74LVC126AS14-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC126AS14-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC126AS14-13?
74LVC126AS14-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC126AS14-13 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 74LVC126AS14-13?
For technical support, including 74LVC126AS14-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC126AS14-13 requirements.
6.How does Aetrix verify that 74LVC126AS14-13 is sourced from the original manufacturer or authorized distributors?
All 74LVC126AS14-13 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 74LVC126AS14-13 meets industry standards.
7.What is the process for return or replacement of 74LVC126AS14-13?
All 74LVC126AS14-13 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC126AS14-13, 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 74LVC126AS14-13 part is unused and in its original packaging.
Return procedure for 74LVC126AS14-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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