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Nexperia USA Inc. 74VHCT125BQ,115
- Part No.:
- 74VHCT125BQ,115
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 14-VFQFN Exposed Pad
- Datasheet:
-
74VHCT125BQ,115.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,069
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Product details
Overview
74VHCT125BQ,115 from Nexperia is a quad non-inverting 3-state buffer/line driver IC with TTL-compatible inputs, operating from 4.5 V to 5.5 V, featuring 3.0 ns typical propagation delay (VCC = 5 V, CL = 15 pF), ±8 mA output drive, and -40 °C to +125 °C temperature range - used for bus isolation and signal conditioning in industrial control backplanes.
For engineers reviewing the 74VHCT125BQ,115 datasheet, 74VHCT125BQ,115 pinout, 74VHCT125BQ,115 application, or 74VHCT125BQ,115 equivalent, key selection criteria include TTL-level input compatibility, 3-state enable timing (tEN ≤ 7.3 ns), DHVQFN14 thermal performance, and guaranteed operation across extended industrial temperature range.
Technical Context
The 74VHCT125BQ,115 implements four independent non-inverting buffers, each with active-low 3-state enable (nOE) controlling high-impedance output (Z). Its TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V) ensure direct interfacing with legacy LSTTL logic without level shifting.
It uses Si-gate CMOS technology compliant with JEDEC JESD7-A, delivering balanced tPLH/tPHL propagation delays and Schmitt-trigger input hysteresis on all pins - enabling robust noise immunity in electrically noisy industrial environments where signal integrity is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage (VCC) | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL systems and stable operation under rail tolerance. |
| Propagation Delay (tpd) | 3.0 ns (typ) at VCC = 5 V, CL = 15 pF - enables high-speed data routing in synchronous bus architectures up to ~150 MHz effective toggle rate. |
| Output Drive (IO) | ±8.0 mA - supports driving 50 pF loads with <9.5 ns max delay, sufficient for fan-out to ≥10 LSTTL inputs. |
| Enable Time (ten) | 4.9 ns (typ) at VCC = 5 V, CL = 50 pF - guarantees fast bus turnaround in bidirectional data transfer protocols. |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood industrial automation, motor drives, and power supply monitoring circuits. |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - matches TTL logic levels, eliminating need for external level translators. |
| ESD Protection | HBM >2000 V, CDM >1000 V - meets IEC 61000-4-2 system-level ESD robustness requirements for board-level integration. |
Pinout & Package
DHVQFN14 (SOT762-1) package: 2.5 × 3.0 × 0.85 mm body, no leads, exposed thermal pad, 14 terminals, terminal 1 index area marked, RoHS-compliant matte tin finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | nOE (active-low enable) | Four independent enable inputs - pulling any nOE HIGH forces corresponding output into high-Z state for bus contention avoidance. |
| 2, 5, 9, 12 | nA (data input) | Four buffered TTL-compatible inputs - accept VIH ≥2.0 V, VIL ≤0.8 V, with Schmitt-trigger hysteresis for noise rejection. |
| 3, 6, 8, 11 | nY (data output) | Four non-inverting 3-state outputs - deliver VOH ≥3.94 V (IO = −8 mA) and VOL ≤0.36 V (IO = 8 mA) at VCC = 4.5 V. |
| 7 | GND | Ground reference (0 V) - must be low-inductance connection; ties to exposed thermal pad for thermal dissipation. |
| 14 | VCC | Positive supply - decoupling capacitor (100 nF ceramic) required within 3 mm of pin for stable high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible input thresholds | VIH = 2.0 V min / VIL = 0.8 V max at VCC = 4.5–5.5 V - enables direct interface with legacy 5 V microcontrollers and FPGAs without level shifters. |
| Balanced propagation delays | tPLH and tPHL match within 0.3 ns (typ) - prevents duty cycle distortion in clock distribution or data strobe paths. |
| Schmitt-trigger inputs | Hysteresis ≥0.3 V - suppresses false triggering from slow-rising or noisy signals in industrial sensor interfaces. |
| Thermally enhanced DHVQFN | RθJA = 98 °C/W (typ), 9.6 mW/K derating above 98 °C - sustains full output drive at +125 °C ambient in enclosed enclosures. |
| Extended temperature qualification | Tested and guaranteed over −40 °C to +125 °C - validated for use in motor control modules and power conversion feedback loops. |
Applications
| Industrial Backplane Bus Isolation | Microcontroller GPIO Expansion |
|---|---|
|
Use Scenario: Isolating multiple 5 V peripheral modules (ADCs, DACs, sensors) on a shared parallel bus in programmable logic controllers. IC Role / Device Role / Timing Role: Acts as direction-controlled bus buffer; nOE lines synchronized to address decode to prevent contention during read/write cycles. Use Value: Enables hot-swap-capable modular I/O architecture with <7 ns enable/disable timing, reducing bus turnaround latency by 40% vs. discrete transistor arrays. |
Use Scenario: Expanding limited GPIO count of an ARM Cortex-M4 MCU to drive 16-bit parallel LCD interface and external SRAM. IC Role / Device Role / Timing Role: Provides level-shifted, slew-rate-controlled buffering between MCU's 3.3 V tolerant pins and 5 V display/SRAM bus. Use Value: Eliminates need for discrete level shifters while maintaining <9.5 ns max propagation delay - preserves timing margin for 20 MHz SRAM access. |
| Legacy TTL System Interfacing | Programmable Logic Output Conditioning |
|
Use Scenario: Interfacing modern FPGA I/O banks (3.3 V LVTTL) to legacy 5 V TTL instrumentation subsystems in test equipment. IC Role / Device Role / Timing Role: Serves as bidirectional voltage translator and bus driver; enables FPGA to safely source/sink 8 mA into 5 V loads. Use Value: Avoids risk of overvoltage damage to FPGA pins while meeting TTL VOH/VOL specs - certified for continuous 5 V output operation. |
Use Scenario: Driving high-capacitance PCB traces (>80 pF) from CPLD outputs in motor drive gate driver sequencers. IC Role / Device Role / Timing Role: Buffers and strengthens CPLD output signals before routing to multiple MOSFET gate drivers. Use Value: Reduces rise/fall time degradation by 65% compared to direct CPLD drive - ensures simultaneous turn-on of parallel IGBTs within 2 ns skew. |
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 |
|---|---|---|---|
| SN74LVC125APWR | CMOS-input (not TTL-compatible); VCC = 1.65–3.6 V only; lower drive (±24 mA but at 3.3 V). | Requires level translation when interfacing to 5 V TTL; unsuitable for direct replacement in existing 5 V designs. | Select only if migrating entire system to 3.3 V logic and needing higher drive current per channel. |
| 74ACT125SCX | Bipolar TTL process; faster (2.5 ns typ), but higher ICC (40 mA max), no Schmitt inputs, and narrower temp range (−40 °C to +85 °C). | Higher power consumption limits use in thermally constrained enclosures; lacks noise immunity for long trace runs. | Choose only for ultra-low-delay applications where thermal headroom exists and noise immunity is secondary. |
Compared with SN74LVC125APWR and 74ACT125SCX, the 74VHCT125BQ,115 uniquely combines TTL input compatibility, extended temperature operation, Schmitt-trigger noise immunity, and thermally optimized DHVQFN packaging - making it the sole drop-in solution for upgrading legacy 5 V industrial backplanes without redesigning signal conditioning.
Availability
74VHCT125BQ,115 is available at Aetrix Electronics and suitable for industrial automation, motor control, and embedded instrumentation requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 74VHCT125BQ,115 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 discrete components - serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The 74VHCT series targets industrial and legacy-system upgrades, delivering pin-compatible replacements for obsolete LSTTL devices with CMOS efficiency, extended temperature capability, and robust ESD performance.
FAQ
Is the 74VHCT125BQ,115 compatible with 3.3 V microcontroller outputs?
No - the 74VHCT125BQ,115 requires VCC = 4.5–5.5 V and has TTL input thresholds (VIH ≥2.0 V), so 3.3 V logic outputs may not reliably meet VIH under worst-case conditions. Use 74LVC125 for 3.3 V systems, or add a resistor divider if interfacing to 5 V-tolerant MCU pins.
Does the DHVQFN14 package require solder paste stencil adjustments versus SO14?
Yes - SOT762-1 uses a 0.4 mm pitch, 0.2 mm pad width, and exposed thermal pad requiring 50–60% aperture ratio on the stencil. Reflow profile must include 60 s above 220 °C to ensure void-free thermal pad wetting, unlike SO14 which needs no thermal pad profiling.
Can unused nOE inputs be left floating?
No - all nOE inputs must be tied to GND or VCC via ≤10 kΩ resistors. Floating nOE pins cause undefined output states due to CMOS input leakage, risking bus contention or excessive ICC. Tie unused enables LOW to keep outputs active or HIGH to force high-Z.
What is the maximum capacitive load this device can drive at 5 V while maintaining timing specs?
The datasheet specifies tpd ≤7.5 ns and ten ≤9.5 ns up to CL = 50 pF at VCC = 4.5–5.5 V. Driving >50 pF increases delay nonlinearly and may violate setup/hold margins; for 100 pF loads, add series termination or use dual-stage buffering.
74VHCT125BQ,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74VHCT
- Package/Case:
- 14-VFQFN Exposed Pad
- 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:
- 8mA, 8mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-DHVQFN (2.5x3)
74VHCT125BQ,115 FAQ
1.How can I place an order for 74VHCT125BQ,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VHCT125BQ,115 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 74VHCT125BQ,115 reliable?
The price and inventory of 74VHCT125BQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VHCT125BQ,115 is usually 5 days.
3.What payment methods are accepted for 74VHCT125BQ,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VHCT125BQ,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VHCT125BQ,115?
74VHCT125BQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VHCT125BQ,115 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 74VHCT125BQ,115?
For technical support, including 74VHCT125BQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VHCT125BQ,115 requirements.
6.How does Aetrix verify that 74VHCT125BQ,115 is sourced from the original manufacturer or authorized distributors?
All 74VHCT125BQ,115 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 74VHCT125BQ,115 meets industry standards.
7.What is the process for return or replacement of 74VHCT125BQ,115?
All 74VHCT125BQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74VHCT125BQ,115, 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 74VHCT125BQ,115 part is unused and in its original packaging.
Return procedure for 74VHCT125BQ,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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