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STMicroelectronics 74LCX86MTR
- Part No.:
- 74LCX86MTR
- Manufacturer:
- STMicroelectronics
- Category:
- Gates and Inverters
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74LCX86MTR.pdf
- Description:
- IC GATE XOR 4CH 2-INP 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,009
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Product details
Overview
74LCX86MTR from STMicroelectronics is a low-voltage CMOS quad XOR gate with 5V-tolerant inputs, operating from 2.0V to 3.6V supply, delivering 6.5ns max propagation delay at 3V and symmetrical ±24mA output drive. It enables 3.3V logic interfacing with legacy 5V systems in bus transceivers, parity generators, and arithmetic units.
For engineers reviewing the 74LCX86MTR datasheet, 74LCX86MTR pinout, 74LCX86MTR application, or 74LCX86MTR equivalent, key selection criteria include 5V input tolerance, balanced tPLH/tPHL skew ≤1.0ns, PCI-bus-compliant 24mA drive, SO-14 package compatibility, and ESD immunity >2000V HBM.
Technical Context
The 74LCX86MTR implements four independent 2-input XOR gates using sub-micron C2MOS technology, supporting mixed-voltage system interconnects via 5V-tolerant inputs while maintaining full 3.3V core operation. Its power-down protection ensures safe I/O states during VCC = 0V conditions.
Propagation delays are tightly matched (tPLH ≅ tPHL), with output-to-output skew guaranteed ≤1.0ns across temperature and voltage. Input leakage remains ≤±5µA, and dynamic noise margins are reinforced by 6pF typical input capacitance and 43pF power-dissipation capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Operating Range | 2.0V to 3.6V - Enables direct integration into 3.3V embedded control rails without level-shifting. |
| tPD Max | 6.5ns at VCC = 3.0V - Matches AC/ACT-logic speed at half the supply voltage and power. |
| IOH/IOL Min | ±24mA at VCC = 3.0–3.6V - Drives PCI-bus loads and fan-out of ≥10 LVTTL inputs. |
| Input Voltage Tolerance | 0V to 5.5V - Allows direct connection to 5V microcontrollers or legacy peripherals without external clamping. |
| ESD Rating | HBM > 2000V - Meets industrial handling requirements without additional board-level protection. |
| Output Skew | ≤1.0ns - Ensures deterministic timing across all four XOR outputs in synchronous logic paths. |
Pinout & Package
74LCX86MTR is housed in a 14-pin SOIC (SO-14) package per JEDEC MS-012, with 1.27mm pitch, gull-wing leads, and ECOPACK® lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 9, 12 | 1A–4A | Independent XOR input A for each gate - accepts 0–5.5V signals regardless of VCC state. |
| 2, 5, 10, 13 | 1B–4B | Independent XOR input B for each gate - supports asynchronous or clock-synchronous data comparison. |
| 3, 6, 8, 11 | 1Y–4Y | Combinational XOR output Y = A ⊕ B - delivers rail-to-rail swing with matched rise/fall impedance. |
| 7 | GND | Digital ground reference - must be connected before VCC to prevent latch-up per JESD17 (>500mA). |
| 14 | VCC | Primary supply pin - powers internal logic and output drivers; decoupling capacitor required within 1cm. |
Key Features
| Feature | Design Value |
|---|---|
| 5V-tolerant inputs | Enables seamless interface between 3.3V logic and 5V peripherals without external level shifters or resistors. |
| Symmetrical output drive | Identical |IOH| and IOL (≥24mA) eliminates duty-cycle distortion in clocked XOR applications like phase detection. |
| Power-down protection | Inputs and outputs remain high-impedance and non-latching when VCC = 0V, preventing back-driving of powered subsystems. |
| Latch-up immunity | Exceeds 500mA per JESD17 - allows robust operation in noisy industrial environments with transient coupling. |
Applications
| Parity Generation | Bus Interface Logic |
|---|---|
Use Scenario: Generating odd/even parity bits across 8-bit data buses in memory controllers and UART interfaces. IC Role / Device Role / Timing Role: Combinational XOR gate performing bitwise exclusive-OR summation across parallel data lines. Use Value: Delivers deterministic 6.5ns propagation with <1ns skew across all four gates, ensuring synchronized parity bit assertion before bus cycle completion. | Use Scenario: Isolating and translating address/data signals between 3.3V FPGAs and 5V peripheral ICs on shared PCB traces. IC Role / Device Role / Timing Role: Voltage-level translator and signal integrity conditioner for bidirectional bus arbitration logic. Use Value: 5V-tolerant inputs accept full-swing 5V signals while driving 3.3V-compatible loads with ±24mA current, eliminating external pull-ups or buffers. |
| Arithmetic Logic Unit (ALU) | Phase Detection & Clock Recovery |
Use Scenario: Implementing half-adder carry and sum functions in low-power microcontroller co-processors. IC Role / Device Role / Timing Role: Core combinatorial logic element computing A ⊕ B and A·B for binary addition operations. Use Value: Matched tPLH/tPHL ensures zero-duty-cycle error in sum/carry generation, critical for pipelined ALU stages. | Use Scenario: Detecting zero-crossing alignment between reference and feedback clocks in PLL-based timing recovery circuits. IC Role / Device Role / Timing Role: Digital phase comparator producing high pulse width proportional to phase difference. Use Value: Sub-7ns propagation and <1ns output skew enable precise phase-error sampling at ≥100MHz clock rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad XOR gate applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC86APWR | Same 3.3V operation and SO-14 package; 5V-tolerant inputs confirmed; tPD = 5.2ns (typ) at 3.3V. | Higher speed but lower output drive (±24mA only at VCC = 3.3V, derated below); no explicit PCI-bus guarantee. | Select for tighter timing budgets where 5.2ns typ suffices and PCI compliance is not required. |
| 74AHC86PW,118 | Wider VCC range (2.0–5.5V); higher drive (±8mA min at 2.0V); no 5V-tolerant input specification. | Requires level-shifting for 5V inputs; better suited for pure 2.5V/3.3V systems with marginal supply headroom. | Select when interfacing exclusively within 3.3V domains and lowest static current (<1µA ICC) is prioritized over 5V tolerance. |
Compared with SN74LVC86APWR and 74AHC86PW,118, the 74LCX86MTR uniquely guarantees PCI-bus drive at 24mA and maintains full 5V input tolerance across its entire 2.0–3.6V VCC range - making it optimal for mixed-voltage backplane and legacy peripheral interface designs.
Availability
74LCX86MTR is available at Aetrix Electronics and suitable for industrial control panels, telecom line cards, and automotive body electronics requiring stable component supply and long-term obsolescence management.
Supply support for 74LCX86MTR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing silicon solutions for automotive, industrial, and consumer markets since 1987.
The 74LCX family was engineered specifically for low-voltage, high-speed 3.3V system interfacing with backward compatibility to 5V logic, targeting cost-sensitive, power-constrained embedded applications.
FAQ
Can 74LCX86MTR operate reliably at 2.0V supply?
Yes. The device is fully specified from 2.0V to 3.6V, with guaranteed truth table operation down to 1.5V and DC parameters including VIH = 2.0V and VOL = 0.55V at 24mA load. Propagation delay increases to 6.0ns max at 2.7V and 6.5ns at 3.0–3.6V, remaining within functional limits across the full range.
Does 74LCX86MTR require external pull-up resistors on inputs?
No. Inputs are internally protected and do not require pull-ups. With 5V-tolerant design, they accept valid logic levels from 0V to 5.5V regardless of VCC. Pull-ups are unnecessary unless used for specific bus-wire-OR configurations - which this device does not support natively.
Is the SO-14 package RoHS-compliant and lead-free?
Yes. The 74LCX86MTR uses ST's ECOPACK® packaging with lead-free second-level interconnect, compliant with RoHS Directive 2011/65/EU. The inner box label and package marking indicate "Lead-free" and conform to JEDEC Standard JESD97 for environmental compliance.
What is the maximum capacitive load this device can drive?
The datasheet specifies dynamic performance up to 50pF load capacitance with 500Ω termination. At 3.3V and CL = 50pF, tPD remains ≤6.5ns. Driving >50pF is possible but degrades speed and increases ground bounce; for >75pF loads, consider buffering or reducing trace length and stubs.
74LCX86MTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74LCX
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- XOR (Exclusive OR)
- 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:
- 0.8V
- Input Logic Level - High:
- 2V
- Max Propagation Delay @ V, Max CL:
- 6.5ns @ 3.3V, 50pF
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
74LCX86MTR FAQ
1.How can I place an order for 74LCX86MTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LCX86MTR 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 74LCX86MTR reliable?
The price and inventory of 74LCX86MTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LCX86MTR is usually 5 days.
3.What payment methods are accepted for 74LCX86MTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LCX86MTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LCX86MTR?
74LCX86MTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LCX86MTR 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 74LCX86MTR?
For technical support, including 74LCX86MTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LCX86MTR requirements.
6.How does Aetrix verify that 74LCX86MTR is sourced from the original manufacturer or authorized distributors?
All 74LCX86MTR 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 74LCX86MTR meets industry standards.
7.What is the process for return or replacement of 74LCX86MTR?
All 74LCX86MTR units undergo pre-shipment inspection (PSI). If there is an issue with 74LCX86MTR, 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 74LCX86MTR part is unused and in its original packaging.
Return procedure for 74LCX86MTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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