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onsemi MC74LCX00MELG
- Part No.:
- MC74LCX00MELG
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MC74LCX00MELG.pdf
- Description:
- IC GATE NAND 4CH 2-INP SOEIAJ-14
- Quantity:
- Payment:
- Shipping:
Inventory:1,144
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Product details
Overview
MC74LCX00MELG from onsemi is a low-voltage CMOS quad 2-input NAND gate operating from 1.65 V to 5.5 V, featuring 5 V-tolerant inputs, 24 mA balanced output drive at 3.0 V, near-zero static supply current (10 µA), and SOIC-14 packaging. It serves as a level-shifting logic buffer in mixed-voltage digital systems such as industrial controllers and embedded interface modules.
For engineers reviewing the MC74LCX00MELG datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, package mapping, functional role in voltage translation, and validated alternative options for design-in and BOM continuity planning.
Technical Context
The MC74LCX00MELG implements four independent NAND gates with TTL-compatible inputs and outputs, enabling interoperability between 3.3 V/2.5 V logic domains and legacy 5 V TTL systems. Its 5.5 V input tolerance allows direct connection to 5 V drivers without external level shifters.
Each gate exhibits matched propagation delays (≤5.5 ns at 3.0–3.6 V) and low dynamic switching noise (VOLP ≤0.8 V at 3.3 V), supporting reliable timing in high-density PCB layouts. Input leakage remains ≤±5.0 µA across full temperature range (−40°C to +125°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 5.5 V - supports single-supply operation across LVTTL, LVCMOS, and 5 V TTL interfaces |
| Input Voltage Tolerance | −0.5 V to +6.5 V - enables safe interfacing with 5 V logic without clamping diodes or resistors |
| Output Drive | ±24 mA at 3.0 V - sufficient to drive standard TTL loads or multiple CMOS inputs without buffering |
| Propagation Delay | ≤5.5 ns (VCC = 3.0–3.6 V) - ensures sub-10 ns timing margins in 50 MHz synchronous control paths |
| Quiescent ICC | 10 µA max - reduces standby power in battery-backed or energy-sensitive applications |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial ambient environments |
| ESD Rating | HBM >2000 V - provides robust handling during manual assembly and board-level integration |
Pinout & Package
MC74LCX00MELG is packaged in a 14-pin SOIC (Case 751A), with 1.27 mm pitch, 8.75 mm × 3.9 mm body, and Pb-free finish. Pin 1 is index-marked; pin 7 is GND and pin 14 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | A0, A1, A2, A3 | NAND gate input A - accepts 5 V-tolerant logic signals; must not float |
| 2, 5, 12, 9 | B0, B1, B2, B3 | NAND gate input B - identical electrical behavior to A pins; tied to VCC/GND if unused |
| 3, 6, 11, 8 | O0, O1, O2, O3 | NAND gate outputs - actively driven HIGH/LOW; tri-state not supported |
| 7 | GND | Ground reference - primary return path for all internal logic and I/O currents |
| 14 | VCC | Power supply - decoupling capacitor (0.1 µF) required within 5 mm of this pin |
Key Features
| Feature | Design Value |
|---|---|
| 5 V-tolerant inputs | Enables direct connection to 5 V microcontrollers or legacy peripherals without external level translators |
| 24 mA output sink/source | Drives up to 10 LVTTL loads or 20+ LVCMOS inputs at 3.3 V, eliminating need for fanout buffers |
| 10 µA quiescent current | Reduces system-level standby power by >95% versus standard 74HC-series equivalents |
| Latchup immunity >100 mA | Guarantees robust operation during transient overvoltage or ESD events in noisy industrial environments |
| −40°C to +125°C operation | Supports deployment in engine control units, motor drives, and outdoor telecom equipment |
Applications
| Industrial PLC I/O Expansion | Automotive Body Control Module |
|---|---|
Use Scenario: Interfacing 3.3 V MCU GPIOs to 5 V discrete sensor outputs in modular I/O racks. IC Role / Device Role / Timing Role: Level-translating NAND gate performing active-low enable decoding for relay driver banks. Use Value: Eliminates need for dual-supply translators; maintains <5.5 ns propagation delay across full voltage range. |
Use Scenario: Signal conditioning and fault detection logic in door module ECUs with mixed 5 V CAN transceivers and 3.3 V microcontrollers. IC Role / Device Role / Timing Role: NAND-based combinatorial logic for window lock status arbitration and anti-pinch timeout gating. Use Value: AEC-Q100 qualified version (MC74LCX00DTR2G−Q) ensures automotive-grade reliability and PPAP compliance. |
| Medical Diagnostic Equipment | Test & Measurement Instrumentation |
Use Scenario: Isolating and debouncing front-panel pushbutton inputs connected to 5 V power rails in portable ultrasound devices. IC Role / Device Role / Timing Role: Input conditioning gate suppressing contact bounce while preserving signal integrity for 3.3 V ARM Cortex-M4 host. Use Value: Near-zero ICC minimizes battery drain during long idle periods; HBM >2000 V prevents ESD-induced resets. |
Use Scenario: Synchronizing trigger signals between 5 V analog front-end ASICs and 3.3 V FPGA-based digital acquisition cores. IC Role / Device Role / Timing Role: Glue logic element implementing edge-triggered enable latching with deterministic setup/hold timing. Use Value: Matched tPLH/tPHL (<1.0 ns skew) ensures precise inter-chip timing alignment in multi-board test systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NAND gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC00APWR | Lower VIH threshold (0.7×VCC min vs. 0.65×VCC); 32 mA drive at 3.3 V; no 5 V tolerance beyond absolute max rating | Requires external clamping for 5 V inputs; suited for pure 3.3 V systems with higher fanout demand | Select when driving >15 LVC loads and 5 V interface is handled elsewhere in the signal chain |
| 74AUP1G00GW,125 | Single-gate variant; 1.8–3.6 V only; 4 mA drive; ultra-low ICC (0.9 µA) | Not suitable for 5 V interface or multi-gate consolidation; used where space and power are critical | Choose for compact, battery-powered subsystems needing one NAND function without voltage translation |
Compared with MC74LCX00MELG, SN74LVC00APWR offers higher drive strength but lacks guaranteed 5 V input tolerance, while 74AUP1G00GW,125 saves board area and power but requires redesign for quad functionality and voltage compatibility.
Availability
MC74LCX00MELG is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device manufacturing requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for MC74LCX00MELG 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient silicon solutions for automotive, industrial, cloud, and medical markets.
The MC74LCX00MELG belongs to the LCX family of low-voltage, 5 V-tolerant logic ICs designed specifically for seamless voltage-domain bridging in mixed-supply digital systems.
FAQ
What is the maximum input voltage the MC74LCX00MELG can safely accept?
The MC74LCX00MELG supports DC input voltages up to +6.5 V per the Absolute Maximum Ratings table, with guaranteed 5 V tolerance during normal operation. This allows direct connection to 5 V TTL outputs without external protection, provided VCC is ≥1.65 V and inputs are not floated.
Does the MC74LCX00MELG support tri-state outputs?
No, the MC74LCX00MELG does not feature tri-state outputs. All four NAND gates provide actively driven HIGH or LOW outputs only. The device lacks output-enable controls, so bus-sharing or wired-OR configurations require external isolation circuitry.
What is the typical propagation delay of the MC74LCX00MELG at 3.3 V supply?
At VCC = 3.0–3.6 V and TA = −40°C to +125°C, the MC74LCX00MELG exhibits a maximum propagation delay of 5.5 ns (tPLH/tPHL). This value is measured under standard load conditions (CL = 50 pF, RL = 500 Ω) and ensures predictable timing in 50 MHz control loops.
Can unused inputs on the MC74LCX00MELG be left floating?
No - unused inputs on the MC74LCX00MELG must be tied to either VCC or GND. Floating inputs increase ICC, induce oscillation, and risk latchup due to undefined internal node biasing. The datasheet explicitly states "For ICC reasons, DO NOT FLOAT Inputs."
Is the MC74LCX00MELG pin-compatible with standard 74HC00 devices?
No - although both are quad 2-input NAND gates in 14-pin SOIC packages, the MC74LCX00MELG uses a different pinout: inputs and outputs are interleaved (e.g., A0/B0/O0 on pins 1/2/3), whereas 74HC00 places all inputs first (pins 1/2/5/6/8/9/12/13). Direct replacement requires PCB layout revision.
MC74LCX00MELG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LCX
- Package/Case:
- 14-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- NAND Gate
- Number of Circuits:
- 4
- Number of Inputs:
- 2
- Features:
- -
- Voltage - Supply:
- 2V ~ 3.6V
- Current - Quiescent (Max):
- 10 µA
- Current - Output High, Low:
- 24mA, 24mA
- Input Logic Level - Low:
- 0.7V ~ 0.8V
- Input Logic Level - High:
- 1.7V ~ 2V
- Max Propagation Delay @ V, Max CL:
- 5.5ns @ 3.3V, 50pF
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOEIAJ-14
MC74LCX00MELG FAQ
1.How can I place an order for MC74LCX00MELG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74LCX00MELG 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 MC74LCX00MELG reliable?
The price and inventory of MC74LCX00MELG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74LCX00MELG is usually 5 days.
3.What payment methods are accepted for MC74LCX00MELG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74LCX00MELG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74LCX00MELG?
MC74LCX00MELG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74LCX00MELG 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 MC74LCX00MELG?
For technical support, including MC74LCX00MELG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74LCX00MELG requirements.
6.How does Aetrix verify that MC74LCX00MELG is sourced from the original manufacturer or authorized distributors?
All MC74LCX00MELG 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 MC74LCX00MELG meets industry standards.
7.What is the process for return or replacement of MC74LCX00MELG?
All MC74LCX00MELG units undergo pre-shipment inspection (PSI). If there is an issue with MC74LCX00MELG, 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 MC74LCX00MELG part is unused and in its original packaging.
Return procedure for MC74LCX00MELG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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