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onsemi 74LVQ02SJX
- Part No.:
- 74LVQ02SJX
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
74LVQ02SJX.pdf
- Description:
- IC GATE NOR 4CH 2-INP 14SOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,388
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Product details
Overview
74LVQ02SJX from Fairchild Semiconductor is a low-voltage quad 2-input NOR gate IC designed for 3.3V digital logic systems, featuring guaranteed simultaneous switching noise immunity, 2.0–3.6V supply range, −40°C to +85°C operating temperature, and 14-lead SOP (EIAJ TYPE II, 5.3mm wide) package. It serves as a core combinational logic element in bus interface, control signal generation, and level-shifting circuits.
For engineers reviewing the 74LVQ02SJX datasheet, pinout, applications, or equivalent options, key selection factors include its guaranteed incident-wave switching into 75Ω transmission lines, pin-to-pin skew performance, dynamic input thresholds (VIHD/VILD), quiet-output VOLP/VOLV specs, and low quiescent ICC (20 µA max).
Technical Context
The 74LVQ02SJX implements four independent 2-input NOR gates with TTL-compatible input thresholds scaled for 3.3V operation (VIH = 2.0V min, VIL = 0.8V max at VCC = 3.0V). Its AC performance is characterized by propagation delays of 1.0–8.0 ns (tPLH/tPHL) and output-to-output skew ≤1.5 ns under CL = 50 pF load.
It supports incident-wave switching on controlled-impedance lines down to 75Ω, with dynamic input voltage limits (VIHD = 2.0V max, VILD = 0.8V max at VCC = 3.3V) and quiet-output noise margins (VOLP = 1.0V max, VOLV = −1.0V min) defined for simultaneous switching noise analysis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0V to 3.6V - Enables direct interfacing with 3.3V LVTTL and LVCMOS systems without level translation. |
| Propagation Delay | 1.0–8.0 ns (CL = 50 pF) - Supports high-speed control logic up to ~125 MHz toggle rate in fanout-1 configurations. |
| Output Skew | ≤1.5 ns - Ensures deterministic timing alignment across all four NOR outputs for synchronous enable/disable functions. |
| Input Thresholds | VIH = 2.0V min, VIL = 0.8V max (VCC = 3.0V) - Provides robust noise margin against ground bounce and crosstalk in dense PCB layouts. |
| Quiet Output Noise | VOLP = 1.0V max, VOLV = −1.0V min - Quantifies worst-case dynamic ground/vcc rail disturbance during simultaneous switching events. |
| Dynamic Input Voltage | VIHD = 2.0V max, VILD = 0.8V max (VCC = 3.3V) - Defines valid transient input window for reliable edge detection under fast-rising/falling signals. |
| Power Dissipation Cap | CPD = 20 pF - Used to calculate dynamic power consumption (P = CPD × VCC² × f) for thermal budgeting. |
Pinout & Package
74LVQ02SJX is housed in a 14-lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm wide (Package Number M14D), with gull-wing leads and standard 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 8, 9, 11, 12 | Gate Inputs (A1/B1, A2/B2, A3/B3, A4/B4) | Four independent 2-input NOR gate inputs; unused inputs must be tied HIGH or LOW per datasheet Note 2. |
| 3, 6, 10, 13 | Gate Outputs (Y1, Y2, Y3, Y4) | Active-low NOR outputs; each capable of sourcing/sinking ±12 mA (IOL/IOH) at VOH/VOL limits. |
| 7 | GND | Digital ground reference; decoupling capacitor placement critical for simultaneous switching noise control. |
| 14 | VCC | Positive supply (2.0–3.6V); requires local 0.1 µF ceramic bypass near pin for high-frequency stability. |
Key Features
| Feature | Design Value |
|---|---|
| Guaranteed incident-wave switching | Validated into 75Ω transmission lines - enables clean signal integrity in backplane and high-speed interconnect applications without termination redesign. |
| Simultaneous switching noise immunity | Specified VOLP/VOLV and dynamic VIHD/VILD - allows accurate SSN modeling for multi-gate logic clusters in noise-sensitive systems. |
| Pin-to-pin skew control | tOSHL/tOSLH ≤1.5 ns - eliminates race conditions when multiple NOR outputs drive common loads (e.g., bus enable lines). |
| Low quiescent current | ICC ≤20 µA max - supports battery-backed or ultra-low-power standby modes in portable and industrial control logic. |
| TTL-compatible thresholds at 3.3V | VIH = 2.0V min, VIL = 0.8V max - ensures interoperability with legacy 5V TTL outputs via pull-up or with modern 3.3V microcontrollers without external biasing. |
Applications
| Bus Enable Control | Reset Signal Conditioning |
|---|---|
Use Scenario: Enabling/disabling data buses in microcontroller peripherals or FPGA I/O banks using active-low enable signals. IC Role / Device Role / Timing Role: Quad NOR gate provides four independent bus-enable logic functions with matched propagation delay and skew. Use Value: Eliminates need for discrete resistor networks or additional logic families; skew control ensures synchronized bus activation across multiple channels. | Use Scenario: Combining multiple reset sources (power-on, watchdog, manual) into a single system-wide reset assertion. IC Role / Device Role / Timing Role: NOR gate implements active-low wired-OR reset combining with predictable timing and noise-immune thresholds. Use Value: Guaranteed VIHD/VILD and quiet-output specs prevent false resets during power rail transients or ESD events. |
| Level Translation Interface | Control Signal Inversion |
Use Scenario: Interfacing 5V TTL outputs to 3.3V logic inputs where open-collector pull-ups are impractical. IC Role / Device Role / Timing Role: NOR gate used as inverting buffer with 3.3V-compatible input thresholds and rail-to-rail output swing. Use Value: VIH/VIL specs ensure reliable recognition of 5V TTL levels; low ICC supports always-on translation in low-power subsystems. | Use Scenario: Generating complementary control signals (e.g., /CS and CS) for memory or peripheral selection logic. IC Role / Device Role / Timing Role: Dual NOR gates configured as inverters provide matched delay and phase inversion for timing-critical strobes. Use Value: ≤1.5 ns skew between inverted pairs guarantees setup/hold timing compliance in synchronous address/data latching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2-input NOR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC02APWR | Wider VCC range (1.65–3.6V); lower tPLH/tPHL (1.5–5.5 ns); no specified incident-wave switching into 75Ω. | Superior speed and lower voltage operation; lacks guaranteed 75Ω line driving capability and SSN characterization. | Preferred for general-purpose 3.3V logic where speed > noise immunity; not recommended for controlled-impedance interconnects. |
| 74AHC02PW | Higher VCC range (2.0–5.5V); higher drive strength (±8 mA); no dynamic VIHD/VILD or VOLP/VOLV specs. | Supports mixed-voltage systems (3.3V/5V); lacks SSN and transmission-line switching guarantees. | Chosen when 5V compatibility or higher fanout is required; unsuitable for noise-critical or high-speed trace routing. |
Compared with SN74LVC02APWR and 74AHC02PW, the 74LVQ02SJX uniquely delivers verified incident-wave switching into 75Ω lines and quantified quiet-output noise margins - making it the only option among the three qualified for deterministic high-speed board-level signal integrity in industrial control backplanes.
Availability
74LVQ02SJX is available at Aetrix Electronics and suitable for bus interface design, reset signal conditioning, level translation interfaces, and control signal inversion requiring stable component supply and long-term industrial temperature support.
Supply support for 74LVQ02SJX 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 analog and discrete semiconductor manufacturer, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and automotive systems.
The 74LVQ02SJX belongs to the LVQ low-voltage logic family, engineered specifically for noise-immune 3.3V digital systems demanding guaranteed AC timing, simultaneous switching behavior, and transmission-line interface reliability.
FAQ
What is the recommended operating voltage range for the 74LVQ02SJX?
The 74LVQ02SJX is specified for a supply voltage range of 2.0V to 3.6V. Operation outside this range violates the Recommended Operating Conditions per Fairchild DS011342. At VCC = 3.0V, input thresholds are VIH ≥ 2.0V and VIL ≤ 0.8V; exceeding 3.6V risks parametric degradation or latch-up per Absolute Maximum Ratings.
Does the 74LVQ02SJX support pin-to-pin replacement with standard 74LS02 or 74HC02 devices?
No - the 74LVQ02SJX is not a pin-to-pin replacement for 74LS02 or 74HC02. While pinout matches the standard 14-lead dual-in-line/SOIC layout (14-pin SOP), its electrical characteristics differ significantly: LS devices require 5V and draw higher ICC; HC devices operate up to 6V but lack guaranteed 75Ω incident-wave switching and SSN specs defined for the 74LVQ02SJX.
What does "guaranteed incident wave switching into 75Ω" mean for the 74LVQ02SJX?
This specification means the 74LVQ02SJX has been tested and guaranteed to cleanly drive transmission lines with characteristic impedance as low as 75Ω without signal reflection-induced ringing or overshoot - critical for backplane and high-speed interconnect designs. It reflects validated edge-rate and output impedance behavior under fast-switching conditions, unlike generic logic families.
How should unused inputs on the 74LVQ02SJX be handled?
Per Fairchild DS011342 Note 2, all unused inputs on the 74LVQ02SJX must be held either HIGH (tied to VCC) or LOW (tied to GND); floating inputs are strictly prohibited. Leaving inputs unconnected may cause increased ICC, erratic output states, or excessive power dissipation due to undefined input threshold crossing.
Is the 74LVQ02SJX suitable for automotive applications?
The 74LVQ02SJX is rated for −40°C to +85°C operation, meeting extended industrial temperature requirements. However, it is not AEC-Q100 qualified and lacks automotive-specific reliability testing or PPAP documentation. For automotive use, designers must perform full qualification per vehicle OEM requirements; the 74LVQ02SJX is commonly deployed in non-safety-critical industrial control modules.
74LVQ02SJX 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:
- NOR Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 2V ~ 3.6V
- Current - Quiescent (Max):
- 2 µA
- Current - Output High, Low:
- 12mA, 12mA
- Input Logic Level - Low:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 7.5ns @ 3.3V, 50pF
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOP
74LVQ02SJX FAQ
1.How can I place an order for 74LVQ02SJX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVQ02SJX 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 74LVQ02SJX reliable?
The price and inventory of 74LVQ02SJX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVQ02SJX is usually 5 days.
3.What payment methods are accepted for 74LVQ02SJX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVQ02SJX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVQ02SJX?
74LVQ02SJX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVQ02SJX 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 74LVQ02SJX?
For technical support, including 74LVQ02SJX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVQ02SJX requirements.
6.How does Aetrix verify that 74LVQ02SJX is sourced from the original manufacturer or authorized distributors?
All 74LVQ02SJX 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 74LVQ02SJX meets industry standards.
7.What is the process for return or replacement of 74LVQ02SJX?
All 74LVQ02SJX units undergo pre-shipment inspection (PSI). If there is an issue with 74LVQ02SJX, 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 74LVQ02SJX part is unused and in its original packaging.
Return procedure for 74LVQ02SJX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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