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onsemi MC74LCX08D
- Part No.:
- MC74LCX08D
- Manufacturer:
- onsemi
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC74LCX08D.pdf
- Description:
- IC GATE AND 4CH 2-INP 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,555
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Product details
Overview
MC74LCX08D from onsemi is a low-voltage CMOS quad 2-input AND gate operating from 1.65 V to 5.5 V, featuring 5.0 V-tolerant inputs, 24 mA balanced output drive at 3.0 V, and near-zero static supply current (10 µA). It serves as a level-shifting logic interface in mixed-voltage digital systems such as automotive body control modules and industrial I/O expanders.
For engineers reviewing the MC74LCX08D datasheet, pinout, applications, or equivalent options, key selection criteria include its 5 V-tolerant input capability, SOIC-14/TSSOP-14 package options, −40 °C to +125 °C automotive-grade temperature range, and AEC-Q100 qualification for safety-critical embedded logic functions.
Technical Context
The MC74LCX08D implements four independent 2-input AND gates with TTL-compatible inputs and LVCMOS/LVTTL-compatible outputs. Its input structure supports safe interfacing with 5 V logic while powered from 1.65–5.5 V supplies, enabling bidirectional voltage translation without external components.
Each gate exhibits matched propagation delays (4.0 ns max at 4.5–5.5 V), low dynamic switching noise (VOLP = 0.8 V at 3.3 V), and robust ESD protection (>2000 V HBM). The device operates with latchup immunity exceeding 100 mA and maintains stable logic states across its full −40 °C to +125 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65 V to 5.5 V - Enables direct operation from 1.8 V, 2.5 V, 3.3 V, or 5 V rails without level shifters. |
| Input Voltage Tolerance | −0.5 V to +6.5 V - Allows safe connection to 5 V TTL outputs even when VCC = 1.8 V. |
| Output Drive Strength | ±24 mA at 3.0 V - Sufficient to drive multiple LVTTL loads or moderate PCB trace capacitance. |
| Propagation Delay | 4.0 ns max at 4.5–5.5 V - Supports >100 MHz toggle rates in critical timing paths. |
| Quiescent Supply Current | 10 µA max - Minimizes standby power in battery-backed or energy-sensitive applications. |
| Operating Temperature | −40 °C to +125 °C - Qualified per AEC-Q100 for under-hood automotive use. |
| ESD Rating (HBM) | >2000 V - Meets industrial and automotive handling requirements without additional protection. |
Pinout & Package
TSSOP-14 package (Case 948G), 5.0 mm × 4.4 mm footprint, 0.65 mm pitch, Pb-free, RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 5, 8, 9, 12, 13 | Data Inputs (A0/B0, A1/B1, A2/B2, A3/B3) | Four independent AND gate input pairs; each pair must be tied to defined logic levels - floating inputs increase ICC and risk metastability. |
| 3, 6, 11, 14 | Outputs (O0, O1, O2, O3) | Active-push-pull outputs; capable of sourcing/sinking 24 mA at 3.0 V with rail-to-rail swing. |
| 7 | GND | Ground reference for all logic and power domains; requires low-impedance PCB connection to minimize ground bounce. |
| 14 | VCC | Single positive supply input; decoupling capacitor (0.1 µF ceramic) required within 5 mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| 5 V-tolerant inputs | Enables seamless integration between legacy 5 V subsystems and modern low-voltage controllers without external translators. |
| 24 mA balanced output drive | Supports fan-out of ≥10 LVTTL loads or driving 50 pF capacitive loads with <4 ns delay at 5 V. |
| AEC-Q100 qualified (−Q suffix) | Validated for automotive applications including body electronics, lighting control, and sensor interface modules. |
| Near-zero static current (10 µA) | Reduces system-level quiescent power by >95% compared to standard TTL AND gates in always-on logic paths. |
| Latchup immunity >100 mA | Ensures robust operation during transient overvoltage events or hot-swap conditions in industrial backplanes. |
Applications
| Automotive Body Control Unit | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Logic-level validation of door lock switch signals before routing to microcontroller GPIO. IC Role / Device Role / Timing Role: Quad AND gate performing signal conditioning and voltage-level adaptation from 5 V mechanical switches to 3.3 V MCU inputs. Use Value: Eliminates need for discrete level translators; reduces BOM count and PCB area while maintaining AEC-Q100 compliance. |
Use Scenario: Debouncing and OR-ing of multiple 24 V DC field inputs via optocoupler outputs into a common logic bus. IC Role / Device Role / Timing Role: Signal aggregation gate that combines isolated inputs into synchronized enable/control signals for downstream logic. Use Value: Provides deterministic propagation delay (<4 ns) and high noise immunity for real-time I/O response in noisy factory environments. |
| Medical Patient Monitor Interface | Consumer Smart Appliance Control Board |
Use Scenario: Enabling/disabling sensor data acquisition paths based on user mode selection and system readiness flags. IC Role / Device Role / Timing Role: Enable-gating logic that synchronizes analog front-end activation with microcontroller state machine transitions. Use Value: Low 10 µA ICC ensures minimal impact on battery runtime in portable diagnostic devices operating at 1.8 V. |
Use Scenario: Interlocking safety logic between lid switch, water level sensor, and motor driver enable lines in washing machine control. IC Role / Device Role / Timing Role: Hardware-based AND gate enforcing multi-condition safety checks prior to actuator activation. Use Value: Fail-safe behavior with no software dependency; guaranteed response time <4 ns prevents race conditions during rapid state changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 2-input AND gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC08APWR | Wider VCC range (1.65–3.6 V only); no 5 V input tolerance; lower max output drive (24 mA @ 3.3 V same, but not rated at 5 V). | Suitable for pure 3.3 V systems; not recommended where 5 V legacy interfaces exist. | Select SN74LVC08APWR only if system uses exclusively ≤3.6 V supplies and no 5 V signal sources are present. |
| 74AHC08PW,118 | Higher VCC max (5.5 V), but input tolerance limited to VCC + 0.5 V; no AEC-Q100 qualification; higher ICC (100 µA typical). | Acceptable for commercial-grade consumer applications; unsuitable for automotive or extended-temperature industrial use. | Choose 74AHC08PW,118 only for cost-sensitive non-automotive designs where AEC-Q100 and ultra-low ICC are not required. |
Compared with SN74LVC08APWR and 74AHC08PW,118, the MC74LCX08D uniquely combines 5 V-tolerant inputs, AEC-Q100 qualification, and 10 µA ICC - making it the sole option for automotive or industrial mixed-voltage AND logic requiring zero-power standby and legacy interface compatibility.
Availability
MC74LCX08D is available at Aetrix Electronics and suitable for automotive body control units, industrial PLC I/O modules, and medical patient monitor interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MC74LCX08D 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 power, analog, sensors, and logic solutions for automotive, industrial, and cloud infrastructure markets.
The MC74LCX08D belongs to the LCX family of low-voltage, 5 V-tolerant logic ICs designed specifically for mixed-supply system interfacing in automotive and industrial applications demanding AEC-Q100 reliability and ultra-low static power.
FAQ
What is the maximum input voltage rating for MC74LCX08D?
The MC74LCX08D supports DC input voltages from −0.5 V to +6.5 V, enabling safe operation with 5 V TTL signals regardless of VCC level (1.65–5.5 V). This specification is verified per the Absolute Maximum Ratings table in the official onsemi datasheet Rev. 11, confirming robustness against overvoltage transients and mixed-voltage interfacing.
Does MC74LCX08D require external pull-up or pull-down resistors on unused inputs?
Yes - unused inputs on the MC74LCX08D must be tied to either VCC or GND. Floating inputs increase ICC, cause unpredictable logic states, and may induce oscillation due to high-impedance TTL-compatible input structure. This requirement is explicitly stated in the datasheet's "Recommended Operating Conditions" section on page 3.
Is MC74LCX08D pin-compatible with standard 74-series AND gates like 74HC08?
No - while functionally equivalent as a quad 2-input AND gate, the MC74LCX08D uses a different pinout than 74HC08. For example, MC74LCX08D assigns pins 1/2/3 to A0/B0/O0, whereas 74HC08 places A0/B0/O0 on pins 1/2/3 but arranges remaining gates differently. Always verify against Figure 1 (Pinout) in the MC74LCX08D datasheet before board layout.
What is the thermal resistance (θJA) of MC74LCX08D in its TSSOP-14 package?
The MC74LCX08D in TSSOP-14 (Case 948G) has a junction-to-ambient thermal resistance (θJA) of 150 °C/W, measured per JESD51-7 on an FR4 board with 2-ounce copper. This value is specified in the "Maximum Ratings" table on page 3 of the onsemi datasheet and informs thermal design for continuous operation at elevated ambient temperatures.
Can MC74LCX08D operate reliably at 1.65 V supply with full-speed performance?
Yes - the MC74LCX08D is fully characterized down to 1.65 V, with propagation delay specified at 9.8 ns max (tPLH/tPHL) under those conditions. This enables use in ultra-low-power 1.8 V systems where marginal voltage headroom exists, as confirmed in the "AC Electrical Characteristics" table on page 4 of the datasheet.
MC74LCX08D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LCX
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- AND 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:
- 14-SOIC
MC74LCX08D FAQ
1.How can I place an order for MC74LCX08D through Aetrix?
Please submit a Request for Quotation (RFQ) for MC74LCX08D 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 MC74LCX08D reliable?
The price and inventory of MC74LCX08D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74LCX08D is usually 5 days.
3.What payment methods are accepted for MC74LCX08D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74LCX08D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC74LCX08D?
MC74LCX08D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC74LCX08D 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 MC74LCX08D?
For technical support, including MC74LCX08D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74LCX08D requirements.
6.How does Aetrix verify that MC74LCX08D is sourced from the original manufacturer or authorized distributors?
All MC74LCX08D 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 MC74LCX08D meets industry standards.
7.What is the process for return or replacement of MC74LCX08D?
All MC74LCX08D units undergo pre-shipment inspection (PSI). If there is an issue with MC74LCX08D, 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 MC74LCX08D part is unused and in its original packaging.
Return procedure for MC74LCX08D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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