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onsemi 74LVQ14SJX
- Part No.:
- 74LVQ14SJX
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
74LVQ14SJX.pdf
- Description:
- IC INVERT SCHMITT 6CH 1INP 14SOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,267
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Product details
Overview
74LVQ14SJX from Fairchild Semiconductor is a low-voltage hex inverter IC with Schmitt-trigger inputs, designed for noise-immune signal conditioning in 3.3V digital systems. It provides six independent inverters, each featuring 1.0V typical hysteresis, 13.5ns max propagation delay at 3.3V, and guaranteed incident-wave switching into 75Ω transmission lines - used in clock buffering, waveform shaping, and interface level translation.
For engineers reviewing the 74LVQ14SJX datasheet, pinout, applications, or equivalent options, key selection criteria include Schmitt-trigger hysteresis (0.3–1.2V), VCC range (2.0–3.6V), output drive (±12mA), AC skew performance (≤1.5ns), and SOP-14 package compatibility with JEDEC-standard PCB footprints.
Technical Context
The 74LVQ14SJX implements six independent CMOS inverter stages, each with internally biased Schmitt-trigger input circuitry that establishes distinct positive-going (Vt+ = 2.2V typ) and negative-going (Vt− = 0.5V typ) thresholds. This architecture enables clean edge regeneration of slow-rising or noisy signals without external RC components.
Its AC performance is characterized by tightly controlled propagation delays (tPLH/tPHL ≤15.0ns at 3.3V, CL = 50pF) and output-to-output skew ≤1.5ns, ensuring deterministic timing across all six channels under simultaneous switching conditions - critical for synchronized signal routing in industrial control and data acquisition interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0V to 3.6V - supports direct interfacing with 3.3V LVTTL and LVCMOS logic families without level shifters |
| Hysteresis (Vh) | 0.3V min / 1.2V max - ensures ≥1.0V noise margin against ground bounce and crosstalk on shared PCB traces |
| Propagation Delay | 15.0ns max (tPHL/tPLH, VCC = 3.3V, CL = 50pF) - enables reliable operation up to ~33MHz fundamental frequency |
| Output Drive | ±12mA - sufficient to drive 50pF loads or terminate 75Ω transmission lines without external buffers |
| Input Thresholds | Vt+ = 2.2V typ, Vt− = 0.5V typ - defines precise switching windows for analog-like signal digitization |
| Quiescent ICC | 20.0µA max - maintains ultra-low static power in battery-backed or always-on monitoring circuits |
Pinout & Package
74LVQ14SJX is housed in a 14-lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm wide (Package Number M14D), with standard 1.27mm pitch and gull-wing leads compatible with reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 3, 5, 9, 11, 13 | Inverter Input (In) | Accepts Schmitt-triggered logic signals; each drives one inverter stage |
| 2, 4, 6, 10, 12, 14 | Inverter Output (On) | Provides inverted, jitter-free digital output with rail-to-rail swing |
| 7 | GND | Ground reference for all internal circuitry and I/O |
| 14 | VCC | Positive supply rail (2.0–3.6V); decoupling capacitor required per best practice |
Key Features
| Feature | Design Value |
|---|---|
| Schmitt-trigger input hysteresis | Internally fixed 0.3–1.2V window eliminates need for external feedback resistors in noise-prone environments |
| Guaranteed incident-wave switching | Validated into 75Ω transmission lines - enables direct connection to coaxial or controlled-impedance PCB traces |
| Simultaneous switching noise immunity | Specified dynamic threshold behavior ensures stable operation even when all six outputs switch concurrently |
| Pin-to-pin skew control | ≤1.5ns output-to-output skew allows use in time-critical multi-channel synchronization without external deskew |
Applications
| Industrial Sensor Interface | RS-485/422 Line Receiver Conditioning |
|---|---|
Use Scenario: Converting slow-rising analog comparator outputs or mechanical switch bounce into clean digital logic levels in PLC I/O modules. IC Role / Device Role / Timing Role: Signal conditioner and edge sharpener - transforms noisy or sluggish transitions into monotonic, jitter-free TTL-compatible waveforms. Use Value: Eliminates need for external RC filters or debounce firmware; reduces system latency by >20ns vs. standard inverters due to guaranteed skew and fast propagation. | Use Scenario: Post-processing differential receiver outputs before feeding into UART or FPGA logic in industrial fieldbus nodes. IC Role / Device Role / Timing Role: Digital waveform shaper - converts potentially undershoot/overshoot-laden RS-485 receiver outputs into robust single-ended logic with defined thresholds. Use Value: Prevents false triggering caused by line reflections or EMI-induced threshold crossings; hysteresis rejects transients up to 1.2V peak amplitude. |
| Low-Power Clock Buffering | Microcontroller Reset Signal Conditioning |
Use Scenario: Distributing and cleaning crystal oscillator or PLL-derived clock signals across multiple peripherals in portable instrumentation. IC Role / Device Role / Timing Role: Low-skew clock inverter buffer - preserves edge integrity and phase alignment across six downstream clock domains. Use Value: Enables synchronous sampling across ADCs, DACs, and timers with <1.5ns inter-channel timing error - critical for coherent multi-channel acquisition. | Use Scenario: Debouncing and stabilizing manual reset buttons or power-fail detection signals before asserting microcontroller RESET# input. IC Role / Device Role / Timing Role: Power-up/reset signal conditioner - ensures monotonic, glitch-free assertion/deassertion of active-low reset lines. Use Value: Guarantees minimum reset pulse width compliance (≥100ns) even with sub-millisecond button press jitter; quiescent current <20µA extends battery life in sleep-mode applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar hex inverter with Schmitt-trigger input applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LV14APW | TI part; same VCC range (2.0–5.5V), but wider hysteresis (0.4–1.6V typ), higher ICC (40µA max), and SOIC-14 only | Supports 5V-tolerant inputs; less suitable for strict 3.3V-only designs requiring minimal ICC | Choose if 5V interface compatibility or TI ecosystem alignment is required |
| 74LVC14AD,118 | Nexperia part; identical SOP-14 package, lower propagation delay (10.5ns max), but narrower hysteresis (0.2–0.9V) and no guaranteed 75Ω incident-wave switching | Better speed for high-frequency clock distribution, but reduced noise immunity in EMI-heavy environments | Choose for timing-critical applications where jitter suppression is secondary to propagation delay |
Compared with SN74LV14APW and 74LVC14AD,118, the 74LVQ14SJX uniquely guarantees incident-wave switching into 75Ω lines and offers tighter skew control (≤1.5ns), making it preferred for high-integrity signal conditioning in industrial communications and sensor front-ends where transmission-line effects dominate.
Availability
74LVQ14SJX is available at Aetrix Electronics and suitable for industrial sensor interfaces, RS-485 receiver conditioning, low-power clock buffering, and microcontroller reset signal conditioning requiring stable component supply and long-term obsolescence management.
Supply support for 74LVQ14SJX 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
Fairchild Semiconductor was a U.S.-based designer and manufacturer of analog and mixed-signal semiconductors, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and automotive systems.
The 74LVQ14SJX belongs to Fairchild's LVQ low-voltage logic family, engineered specifically for robust noise immunity and transmission-line compatibility in 3.3V industrial control and instrumentation applications.
FAQ
What is the supply voltage range supported by the 74LVQ14SJX?
The 74LVQ14SJX operates over a VCC range of 2.0V to 3.6V, optimized for 3.3V systems. Operation outside this range is not guaranteed, and absolute maximum ratings limit VCC to −0.5V to +7.0V only for non-operational stress conditions. The 74LVQ14SJX must be powered within 2.0–3.6V to meet all AC and DC specifications including propagation delay, hysteresis, and output drive strength.
Does the 74LVQ14SJX have true Schmitt-trigger inputs, and what is the typical hysteresis value?
Yes, the 74LVQ14SJX features true Schmitt-trigger inputs with internally set thresholds. At VCC = 3.0V, the typical positive-going threshold (Vt+) is 2.2V and the negative-going threshold (Vt−) is 0.5V, yielding 1.7V nominal hysteresis - though the guaranteed range is 0.3V to 1.2V. This hysteresis is stable across temperature and supply voltage, enabling reliable noise rejection in electrically noisy environments.
Can the 74LVQ14SJX drive a 75Ω transmission line directly?
Yes, the 74LVQ14SJX is explicitly guaranteed for incident-wave switching into 75Ω transmission lines across the commercial temperature range, per datasheet Note 5. This capability allows direct connection to coaxial cables or controlled-impedance PCB traces without external series termination resistors - a key differentiator versus standard inverters like the 74LV14.
What is the maximum propagation delay for the 74LVQ14SJX at 3.3V?
The maximum propagation delay for the 74LVQ14SJX is 15.0ns for both tPLH and tPHL when VCC = 3.3V ± 0.3V, CL = 50pF, and TA = −40°C to +85°C. This value is measured under worst-case process, voltage, and temperature conditions and ensures timing predictability in real-world industrial deployments.
Is the 74LVQ14SJX pin-compatible with other 74-series hex inverters in SOP-14 packages?
The 74LVQ14SJX uses standard 14-pin SOP pinout (M14D) matching industry conventions for hex inverters: inputs on pins 1,3,5,9,11,13 and outputs on 2,4,6,10,12,14, with VCC on pin 14 and GND on pin 7. While functionally compatible with 74LV14 and 74LVC14 variants, the 74LVQ14SJX is not a drop-in replacement due to its unique Schmitt-trigger hysteresis profile and guaranteed 75Ω line driving - verify timing and noise requirements before substitution.
74LVQ14SJX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LVQ
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Inverter
- Number of Circuits:
- 6
- Number of Inputs:
- 1
- Features:
- Schmitt Trigger
- Voltage - Supply:
- 2V ~ 3.6V
- Current - Quiescent (Max):
- 2 µA
- Current - Output High, Low:
- 12mA, 12mA
- Input Logic Level - Low:
- 0.5V
- Input Logic Level - High:
- 2.2V
- Max Propagation Delay @ V, Max CL:
- 13.5ns @ 3.3V, 50pF
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOP
74LVQ14SJX FAQ
1.How can I place an order for 74LVQ14SJX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVQ14SJX 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 74LVQ14SJX reliable?
The price and inventory of 74LVQ14SJX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVQ14SJX is usually 5 days.
3.What payment methods are accepted for 74LVQ14SJX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVQ14SJX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVQ14SJX?
74LVQ14SJX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVQ14SJX 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 74LVQ14SJX?
For technical support, including 74LVQ14SJX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVQ14SJX requirements.
6.How does Aetrix verify that 74LVQ14SJX is sourced from the original manufacturer or authorized distributors?
All 74LVQ14SJX 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 74LVQ14SJX meets industry standards.
7.What is the process for return or replacement of 74LVQ14SJX?
All 74LVQ14SJX units undergo pre-shipment inspection (PSI). If there is an issue with 74LVQ14SJX, 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 74LVQ14SJX part is unused and in its original packaging.
Return procedure for 74LVQ14SJX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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