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Diodes Incorporated 74LVCE1G126W5-7
- Part No.:
- 74LVCE1G126W5-7
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
74LVCE1G126W5-7.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V SOT25
- Quantity:
- Payment:
- Shipping:
Inventory:8,604
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Product details
Overview
74LVCE1G126W5-7 from Diodes Incorporated is a single non-inverting buffer gate with 3-state output, designed for voltage-level shifting and bus driving in mixed-voltage systems. It operates across 1.4V–5.5V supply, tolerates 5.5V inputs, delivers ±24mA at 3.3V, and supports partial power-down via IOFF. Used in notebook I/O expansion and peripheral interface isolation.
For engineers reviewing the 74LVCE1G126W5-7 datasheet, 74LVCE1G126W5-7 pinout, 74LVCE1G126W5-7 application, or 74LVCE1G126W5-7 equivalent, key selection criteria include 3-state enable timing (tEN/tDIS ≤ 4.3ns at 3.3V), IOFF leakage (<10μA), 1.5V switching capability, and SOT25 thermal resistance (θJA = 204°C/W).
Technical Context
This device implements a CMOS-based non-inverting buffer with active-high output enable (OE), enabling bidirectional bus control in low-voltage embedded interfaces. Its IOFF circuit blocks current backflow during power-down, satisfying JEDEC JESD78 Class II latch-up immunity (>100mA) and supporting hot-swap-capable system architectures.
The logic function is strictly combinational: Y = A when OE = HIGH; Y = high-impedance when OE = LOW. Propagation delay (tpd) is characterized down to 1.5V (max 6.9ns at CL=15pF), and input transition rate tolerance (20 ns/V at 1.4–3V) ensures robustness against slow-rising signals in mixed-signal domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.4V to 5.5V - enables direct interfacing between 1.8V, 2.5V, 3.3V, and 5V logic domains without level shifters. |
| Output Drive Strength | ±24mA at VCC = 3.3V - sufficient to drive 15pF loads with <3ns propagation delay, supporting high-speed USB or PCIe auxiliary signaling. |
| IOFF Leakage Current | <±10μA at VI/VO = 5.5V - prevents damaging back-current during partial power-down, critical for battery-backed subsystems. |
| Input Voltage Tolerance | Up to 5.5V independent of VCC - allows safe connection to 5V buses while powered from 1.8V, eliminating external clamping diodes. |
| Propagation Delay (tpd) | 0.4ns to 3.0ns (VCC = 3.3V, CL = 15pF) - meets setup/hold timing for 33MHz parallel buses and low-latency sensor readout paths. |
| ESD Protection | 2000V HBM, 200V MM - exceeds industrial IEC 61000-4-2 Level 2 requirements for board-level ESD robustness. |
Pinout & Package
SOT25 (5-pin SC-74A) package: compact surface-mount outline with exposed pad not present; JEDEC-compliant footprint; thermal resistance θJA = 204°C/W on standard FR-4 with 2oz copper.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - A | Data Input | Non-inverting logic input; accepts 0–5.5V regardless of VCC; internally terminated with CMOS gate structure. |
| 2 - OE | Output Enable (active high) | Asynchronous control: HIGH enables Y = A; LOW forces Y into high-impedance state; no internal pull-up/down. |
| 3 - Y | Buffered Output | 3-state CMOS output; drives loads up to ±24mA; transitions fully rail-to-rail under specified VCC conditions. |
| 4 - VCC | Positive Supply | Primary power rail; supplies core logic and output drivers; must be decoupled locally per high-speed digital layout practice. |
| 5 - GND | Ground Reference | Signal and power return path; connects to PCB ground plane; critical for noise immunity and IOFF functionality. |
Key Features
| Feature | Design Value |
|---|---|
| Extended supply range (1.4V–5.5V) | Enables single-component voltage translation across legacy and modern logic families without external regulators. |
| IOFF partial power-down support | Prevents reverse current flow when VCC = 0V but bus lines remain energized - essential for PCIe hot-plug and USB-C port controllers. |
| 30% speed improvement over LVC at 1.8V | Reduces propagation delay to ≤4.8ns (vs. ~7ns for LVC), improving timing margin in 1.8V FPGA I/O banks. |
| 5.5V-tolerant inputs | Eliminates need for external voltage translators when interfacing 5V sensors or legacy peripherals to low-voltage MCUs. |
| Green packaging & RoHS compliance | SOT25 uses bromine/antimony-free molding compound and lead-free finish - compliant with EU Directive 2002/95/EC. |
Applications
| USB Peripheral Isolation | Low-Voltage FPGA I/O Buffering |
|---|---|
|
Use Scenario: Isolating USB 2.0 D+/D− lines during host controller power sequencing to prevent backfeed into unpowered sections. IC Role / Device Role / Timing Role: 3-state buffer controlled by power-good signal; provides clean break in signal path during VCC ramp-up/down. Use Value: IOFF leakage <10μA prevents >100μA parasitic current paths, ensuring reliable USB enumeration after cold boot. |
Use Scenario: Driving off-chip memory or display interface from 1.8V FPGA I/O banks where load capacitance exceeds driver capability. IC Role / Device Role / Timing Role: Non-inverting buffer with sub-5ns tpd; matches FPGA output timing while boosting drive strength to ±24mA. Use Value: Enables 33MHz parallel interface operation without timing closure issues, verified at 1.8V supply. |
| Industrial Sensor Hub Interface | Notebook Embedded Controller Bus |
|
Use Scenario: Level-shifting analog sensor outputs (5V) to 3.3V microcontroller ADC inputs while maintaining signal integrity. IC Role / Device Role / Timing Role: Input-tolerant buffer isolating sensor domain from MCU domain; OE tied HIGH for transparent operation. Use Value: 5.5V input tolerance eliminates external resistive dividers, reducing BOM count and thermal drift error. |
Use Scenario: Expanding LPC or SMbus I/O from embedded controller to keyboard, touchpad, and thermal monitor ICs. IC Role / Device Role / Timing Role: Bus repeater with 3-state control synchronized to EC clock domain; enables multi-drop topology. Use Value: Propagation delay variation <1ns across VCC range ensures deterministic bus arbitration timing across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar non-inverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G126DBVR | Wider VCC range (1.65V–5.5V); lower drive (±24mA only at 3.3V); no 1.5V characterization. | Lacks guaranteed 1.5V operation; unsuitable for ultra-low-power wake-up circuits requiring sub-1.65V startup. | Select if design uses ≥1.65V rails and prioritizes TI's long-term availability over 1.5V margin. |
| 74AUP1G126GW,125 | NXP variant: lower ICC (1μA typical), slower max tpd (7.5ns at 3.3V), same 1.4V–3.6V range. | Better static power efficiency but insufficient speed for 33MHz bus repeater use cases. | Choose for always-on sensor nodes where quiescent current dominates power budget, not speed-critical paths. |
Compared with SN74LVC1G126DBVR and 74AUP1G126GW,125, the 74LVCE1G126W5-7 uniquely combines 1.5V operation, 3.3V ±24mA drive, and 5.5V input tolerance - making it optimal for mixed-voltage portable systems requiring both low-voltage startup and legacy interface compatibility.
Availability
74LVCE1G126W5-7 is available at Aetrix Electronics and suitable for USB peripheral isolation, low-voltage FPGA I/O buffering, and industrial sensor hub interface applications requiring stable component supply across automotive infotainment, medical diagnostics, and industrial automation programs.
Supply support for 74LVCE1G126W5-7 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 components for power management, signal integrity, and protection applications.
The 74LVCE1G126 belongs to Diodes' LVCE logic family, engineered specifically for ultra-low-voltage operation and mixed-signal interoperability in portable and energy-sensitive embedded systems.
FAQ
What is the minimum operating voltage for guaranteed logic operation?
The 74LVCE1G126W5-7 is fully specified from 1.4V to 5.5V, with switching performance characterized down to 1.5V (tpd ≤ 6.9ns). At 1.4V, DC parameters including VOH and VOL remain valid per datasheet Table 4, though AC specs are not guaranteed below 1.5V.
Can OE be left floating in a system design?
No. OE must be actively driven HIGH or LOW; floating OE violates recommended operating conditions and may cause undefined output states or increased ICC. Unused OE pins should be tied to VCC (for enabled default) or GND (for disabled default) using a 10kΩ resistor.
Does this device support hot-swap insertion into a live 5V bus?
Yes - its 5.5V-tolerant inputs and IOFF circuitry allow safe insertion while VCC is unpowered, provided OE is held LOW during insertion. Back-current is limited to <10μA, preventing damage to upstream 5V sources per JESD78 Class II compliance.
How does thermal performance differ between SOT25 and DFN1410 packages?
SOT25 has θJA = 204°C/W; DFN1410 has θJA = 430°C/W - meaning the SOT25 dissipates heat more effectively on standard FR-4. For continuous ±24mA output at 3.3V, SOT25 junction rise is ~12°C vs. ~25°C for DFN1410 under identical layout, impacting long-term reliability in sealed enclosures.
74LVCE1G126W5-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- 74LVCE
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 32mA, 32mA
- Voltage - Supply:
- 1.4V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-25
74LVCE1G126W5-7 FAQ
1.How can I place an order for 74LVCE1G126W5-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVCE1G126W5-7 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 74LVCE1G126W5-7 reliable?
The price and inventory of 74LVCE1G126W5-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVCE1G126W5-7 is usually 5 days.
3.What payment methods are accepted for 74LVCE1G126W5-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVCE1G126W5-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVCE1G126W5-7?
74LVCE1G126W5-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVCE1G126W5-7 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 74LVCE1G126W5-7?
For technical support, including 74LVCE1G126W5-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVCE1G126W5-7 requirements.
6.How does Aetrix verify that 74LVCE1G126W5-7 is sourced from the original manufacturer or authorized distributors?
All 74LVCE1G126W5-7 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 74LVCE1G126W5-7 meets industry standards.
7.What is the process for return or replacement of 74LVCE1G126W5-7?
All 74LVCE1G126W5-7 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVCE1G126W5-7, 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 74LVCE1G126W5-7 part is unused and in its original packaging.
Return procedure for 74LVCE1G126W5-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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