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NXP Semiconductors 74ALVC125D,118
- Part No.:
- 74ALVC125D,118
- Manufacturer:
- NXP Semiconductors
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74ALVC125D,118.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,240
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Product details
Overview
74ALVC125D,118 from Nexperia is a quad non-inverting 3-state buffer/line driver in SO14 (SOT108-1) package, operating from 1.65 V to 3.6 V supply. It features Schmitt-trigger inputs for noise immunity, IOFF partial power-down protection, and guaranteed operation from –40 °C to +125 °C. Used in bus interface isolation, level translation, and data routing in industrial control and instrumentation systems.
For engineers reviewing the 74ALVC125D,118 datasheet, 74ALVC125D,118 pinout, 74ALVC125D,118 application, or 74ALVC125D,118 equivalent, key selection criteria include propagation delay (≤3.2 ns at 3.6 V), 3-state enable/disable timing (≤4.0 ns), IOFF leakage (<±80 μA at VCC = 0 V), and input overvoltage tolerance up to 3.6 V.
Technical Context
The device implements four independent non-inverting buffers, each with active-low 3-state output enable (nOE). Each buffer accepts TTL-compatible inputs and delivers CMOS-level outputs across its full 1.65–3.6 V VCC range. Schmitt-trigger input thresholds provide hysteresis (≈0.3 V typical) to suppress noise on slow-rising/falling signals.
IOFF circuitry actively disables outputs when VCC = 0 V, blocking backflow current during partial power-down - critical for hot-swap and multi-rail system designs. Input clamping diodes and ESD protection (HBM >2000 V, CDM >1000 V) support robust board-level reliability without external protection components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 1.65 V to 3.6 V - enables direct interfacing between 1.8 V, 2.5 V, and 3.3 V logic domains without level shifters. |
| Propagation delay (tpd) | 1.1–3.2 ns at VCC = 3.0–3.6 V - supports high-speed data routing in ≤100 MHz digital buses. |
| Enable time (ten) | 1.0–4.0 ns - ensures fast bus arbitration and low-latency peripheral enable/disable control. |
| IOFF leakage current | <±80 μA at VCC = 0 V - prevents damaging back-current during power sequencing or hot-plug events. |
| Input hysteresis | ≈0.3 V (Schmitt-trigger) - rejects noise on long traces or unshielded cables in industrial environments. |
| ESD rating (HBM) | >2000 V - meets IEC 61000-4-2 Level 2 requirements without external TVS diodes. |
| Operating temperature | –40 °C to +125 °C - qualified for under-hood automotive modules and industrial motor drives. |
Pinout & Package
74ALVC125D,118 uses the SO14 plastic small outline package (SOT108-1), 14-pin, 3.9 mm body width, with gull-wing leads and pin 1 index marker. Pin 1 is 1OE (active-low enable for Buffer 1); pin 7 is GND; pin 14 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | nOE (1OE–4OE) | Active-low enable inputs - drive corresponding buffer outputs into high-impedance state when HIGH. |
| 2, 5, 9, 12 | nA (1A–4A) | Data inputs - accept 0–3.6 V logic levels with Schmitt-trigger hysteresis for noise margin. |
| 3, 6, 8, 11 | nY (1Y–4Y) | Non-inverting buffered outputs - drive loads up to ±24 mA with VOH ≥2.2 V and VOL ≤0.55 V at 3.0 V. |
| 7 | GND | Ground reference - must be connected to system 0 V plane; decoupling capacitor recommended adjacent to pin. |
| 14 | VCC | Supply rail - requires local 100 nF ceramic decoupling; supports 1.65–3.6 V with monotonic operation. |
Key Features
| Feature | Design Value |
|---|---|
| IOFF partial power-down | Blocks backflow current when VCC = 0 V - eliminates need for external isolation switches in multi-supply systems. |
| Schmitt-trigger inputs | Hysteresis ≈0.3 V - allows reliable operation with slow-edge clocks or noisy sensor signals without external RC filtering. |
| Overvoltage-tolerant inputs | Withstand VI up to 3.6 V regardless of VCC - enables safe interfacing with 3.3 V peripherals even when powered from 1.8 V. |
| JEDEC-compliant voltage ranges | Validated per JESD8-7 (1.65–1.95 V), JESD8-5 (2.3–2.7 V), JESD8C/JESD36 (2.7–3.6 V) - ensures interoperability across legacy and modern logic families. |
| Latch-up immunity | >250 mA per JESD78 Class II.A - withstands transient overcurrent events without destructive latch-up. |
Applications
| Industrial Bus Isolation | Multi-Voltage Logic Interface |
|---|---|
Use Scenario: Isolating CAN or RS-485 transceiver data lines from microcontroller GPIOs during firmware updates or fault recovery. IC Role / Device Role / Timing Role: Quad buffer provides direction-controlled signal pass-through with 3-state disable to prevent bus contention during reset. Use Value: IOFF protection prevents backfeed from powered transceivers into unpowered MCU I/O banks, eliminating risk of damage during partial power cycles. | Use Scenario: Interfacing a 1.8 V FPGA I/O bank with 3.3 V ADC and DAC peripherals in a mixed-signal data acquisition module. IC Role / Device Role / Timing Role: Non-inverting buffer translates logic levels bidirectionally while maintaining signal integrity and timing margins. Use Value: Overvoltage-tolerant inputs accept 3.3 V signals at 1.8 V VCC; propagation delay ≤3.2 ns preserves setup/hold timing for 100 MSPS sampling. |
| Hot-Swap Backplane Driver | Programmable Logic Output Stage |
Use Scenario: Driving address/data lines on a modular PLC backplane where cards may be inserted or removed while main power remains active. IC Role / Device Role / Timing Role: 3-state outputs isolate card-local buses from shared backplane during insertion/removal sequences. Use Value: Schmitt-trigger inputs reject contact bounce noise; IOFF blocks current flow if VCC is not yet established, meeting IEC 61000-4-5 surge immunity requirements. | Use Scenario: Providing configurable output drive for FPGA configuration pins (e.g., INIT_B, PROGRAM_B) that must drive multiple loads with precise timing. IC Role / Device Role / Timing Role: Single buffer channel used as programmable output stage with controlled enable timing and low-output impedance. Use Value: VOL ≤0.55 V at 24 mA ensures solid LOW assertion across PCB trace capacitance; ten ≤4.0 ns guarantees synchronous deassertion with FPGA configuration clocks. |
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 | TI part; identical pinout and function but rated only to +85 °C; no IOFF specification in datasheet. | Not suitable for automotive under-hood or industrial high-temp environments requiring +125 °C operation. | Select only if ambient temperature stays ≤85 °C and IOFF is not required for power sequencing. |
| 74LVC125AD,118 | Nexperia's LVC variant; same SO14 package but lacks Schmitt-trigger inputs and IOFF circuitry. | Higher susceptibility to input noise; cannot safely operate in partial power-down configurations. | Choose only for cost-sensitive, room-temperature applications with clean signal sources and single-rail power architecture. |
Compared with SN74LVC125APWR and 74LVC125AD,118, the 74ALVC125D,118 uniquely combines +125 °C qualification, IOFF, and Schmitt-trigger inputs - making it the only option for thermally demanding, multi-rail, noise-prone industrial interfaces.
Availability
74ALVC125D,118 is available at Aetrix Electronics and suitable for industrial bus isolation, multi-voltage logic interfacing, and hot-swap backplane driver applications requiring stable component supply across extended temperature and mixed-supply environments.
Supply support for 74ALVC125D,118 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, discrete, and MOSFET solutions, serving automotive, industrial, and consumer markets with ISO/TS 16949-certified manufacturing.
The ALVC logic family targets high-speed, low-power, mixed-voltage digital interface applications - specifically engineered for robustness in partial power-down, noise-immune, and wide-temperature industrial systems.
FAQ
Can 74ALVC125D,118 operate with VCC = 1.65 V while accepting 3.3 V inputs?
Yes. Its inputs are overvoltage tolerant up to 3.6 V regardless of VCC level. At VCC = 1.65 V, VIH is 0.65 × VCC ≈ 1.07 V and VIL is 0.35 × VCC ≈ 0.58 V, so a 3.3 V input is recognized as HIGH with ample margin. This enables safe level translation from higher-voltage peripherals.
What is the maximum capacitive load the outputs can drive while maintaining specified timing?
The datasheet specifies dynamic characteristics with CL = 30 pF (for VCC ≤2.7 V) and CL = 50 pF (for VCC ≥3.0 V). Propagation delay increases linearly with load capacitance; for reliable 3.2 ns max tpd at 3.6 V, keep total load (trace + IC input + probe) ≤50 pF. Exceeding this degrades timing margin and may cause setup/hold violations.
Does the IOFF feature require external pull-down resistors on outputs during power-down?
No. IOFF internally disables the output FETs when VCC = 0 V, forcing high-impedance state regardless of nOE or nA logic states. External pull resistors are unnecessary and may compromise isolation - the feature is self-contained and requires no additional components or layout changes.
How does Schmitt-trigger input behavior affect signal integrity on long PCB traces?
Schmitt-trigger inputs provide ≈0.3 V hysteresis, rejecting noise spikes <0.3 V and preventing false toggling caused by reflections or crosstalk on unterminated traces up to ~15 cm at 10 MHz. This eliminates need for series termination or RC filters in space-constrained industrial modules where trace lengths exceed λ/10.
74ALVC125D,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ALVC
- Package/Case:
- 14-SOIC (0.154", 3.90mm 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
74ALVC125D,118 FAQ
1.How can I place an order for 74ALVC125D,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ALVC125D,118 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 74ALVC125D,118 reliable?
The price and inventory of 74ALVC125D,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVC125D,118 is usually 5 days.
3.What payment methods are accepted for 74ALVC125D,118?
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4.How is shipping managed for 74ALVC125D,118?
74ALVC125D,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ALVC125D,118 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 74ALVC125D,118?
For technical support, including 74ALVC125D,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVC125D,118 requirements.
6.How does Aetrix verify that 74ALVC125D,118 is sourced from the original manufacturer or authorized distributors?
All 74ALVC125D,118 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 74ALVC125D,118 meets industry standards.
7.What is the process for return or replacement of 74ALVC125D,118?
All 74ALVC125D,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVC125D,118, 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 74ALVC125D,118 part is unused and in its original packaging.
Return procedure for 74ALVC125D,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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