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NXP Semiconductors 74LVC544AD,118
- Part No.:
- 74LVC544AD,118
- Manufacturer:
- NXP Semiconductors
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74LVC544AD,118.pdf
- Description:
- IC TRANSCEIVER INVERT 3.6V 24SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,699
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Product details
Overview
74LVC544AD,118 from NXP Semiconductors is an octal registered inverting transceiver with dual-directional 3-state D-type latches, operating from 1.2 V to 3.6 V supply, supporting 5 V-tolerant I/O, and rated for −40 °C to +125 °C. It enables bidirectional data buffering with independent latch and output enable controls for A↔B paths, used in bus isolation and level-shifting between mixed-voltage subsystems.
For engineers reviewing the 74LVC544AD,118 datasheet, 74LVC544AD,118 pinout, 74LVC544AD,118 application, or 74LVC544AD,118 equivalent, key selection criteria include its 24-pin SO package, inverting logic behavior, latch timing (e.g., tpd ≤ 6.5 ns at 3.3 V), 5 V tolerance, and support for partial power-down (high-impedance I/O at VCC = 0 V).
Technical Context
The 74LVC544AD,118 implements two independent 8-bit registered transceiver channels - A-to-B and B-to-A - each with separate latch enable (LEAB/LEBA) and output enable (OEAB/OEBA) inputs. Its back-to-back latch architecture allows temporary storage of data before propagation, enabling synchronization across asynchronous domains.
Each direction supports transparent mode (latch enabled, output enabled), latched mode (data captured on LE↑), and 3-state disabled mode (OE high). The device complies with JEDEC standards JESD8-7A, JESD8-5A, and JESD8-C/JESD36 across its voltage ranges and features ESD protection exceeding 2000 V HBM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.2 V to 3.6 V - enables operation in ultra-low-power and mixed-voltage systems including 1.8 V and 3.3 V domains. |
| I/O Voltage Tolerance | 5 V tolerant - permits safe interfacing with legacy 5 V TTL logic without external level shifters. |
| Propagation Delay | ≤ 6.5 ns (VCC = 3.0–3.6 V) - ensures tight timing margins in high-speed digital buses and memory interfaces. |
| Operating Temperature | −40 °C to +125 °C - qualified for industrial and extended-temperature embedded control applications. |
| Power Dissipation | ≤ 500 mW (SO24, Tamb ≤ 70 °C) - supports thermally constrained PCB layouts with minimal heatsinking. |
| Input Leakage Current | ±5 µA max (VCC = 3.6 V, VI = 5.5 V or GND) - minimizes standby current in battery-backed or low-power hold modes. |
| Output Drive Strength | ±24 mA (VCC = 3.0 V) - drives standard CMOS loads and moderate-capacitance buses without buffering. |
Pinout & Package
74LVC544AD,118 is housed in a plastic small outline package (SO24) per SOT137-1, with 24 leads, 7.5 mm body width, and standard 1.27 mm lead pitch. Pin 1 is marked by a notch or dot; the package is RoHS-compliant and moisture-sensitive level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (LEBA) | B-to-A latch enable input | Active LOW; captures B-side data into B→A latches on rising edge - enables synchronized read-from-B operations. |
| 2 (OEBA) | B-to-A output enable input | Active LOW; activates 3-state B→A outputs when LEBA is asserted - controls bidirectional bus arbitration. |
| 3–10 (A0–A7) | A-side bidirectional I/O | Connects to A-bus; functions as input when OEAB = L and LEAB = L, or as latched output when OEAB = L and LEAB ↑. |
| 11 (EAB) | A-to-B enable input | Active LOW; gates A→B data flow - must be LOW for A inputs to affect B outputs or latch states. |
| 12 (GND) | Ground reference | 0 V return path for all internal logic and I/O; requires low-inductance connection to minimize noise coupling. |
| 13 (OEAB) | A-to-B output enable input | Active LOW; enables 3-state A→B outputs only when EAB = L - essential for bus contention avoidance. |
| 14 (LEAB) | A-to-B latch enable input | Active LOW; samples A0–A7 on rising edge - stores data for stable B-output delivery independent of A-bus activity. |
| 15–22 (B7–B0) | B-side bidirectional I/O | Connects to B-bus; mirrors A-side functionality with independent LEBA/OEBA control - supports full-duplex register staging. |
| 23 (EBA) | B-to-A enable input | Active LOW; enables B→A data path - required for reading B-bus into B→A latches or driving A outputs. |
| 24 (VCC) | Supply voltage | 1.2–3.6 V core logic supply; decoupling capacitor (100 nF ceramic) required within 5 mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 8-bit registered paths | Enables concurrent A→B and B→A data staging without cross-talk - critical for FIFO-like buffering in protocol bridges. |
| 5 V tolerant I/O with 1.2 V–3.6 V core | Eliminates external level translators when interfacing 3.3 V microcontrollers to 5 V peripherals or legacy backplanes. |
| Partial power-down support (VCC = 0 V) | Places all I/O pins in high-impedance state even with 5 V applied - prevents back-powering and leakage in hot-swap or sleep-mode systems. |
| JEDEC-compliant voltage ranges | Guarantees interoperability across 1.65–1.95 V, 2.3–2.7 V, and 2.7–3.6 V logic families per JESD8-7A/5A/C standards. |
| High ESD robustness (HBM > 2000 V) | Reduces need for external ESD protection on board-level I/O traces - lowers BOM cost and layout complexity. |
Applications
| Industrial Bus Isolation | Memory Interface Buffering |
|---|---|
Use Scenario: Isolating 3.3 V FPGA configuration bus from 5 V legacy peripheral bus in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional registered transceiver providing voltage translation and metastability mitigation via latch synchronization. Use Value: Prevents bus contention during hot-plug events and ensures deterministic data capture at 100 MHz clock rates using LEAB/LEBA timing control. |
Use Scenario: Buffering address/data lines between a 1.8 V SoC and 3.3 V parallel NOR flash in embedded boot loaders. IC Role / Device Role / Timing Role: Octal inverting transceiver with independent latch enables acting as a synchronous interface bridge. Use Value: Enables reliable write strobe alignment and read data hold using tW ≥ 2.0 ns (VCC = 3.0–3.6 V) and tpd ≤ 6.5 ns. |
| Automotive Diagnostic Interface | Test Equipment Signal Conditioning |
Use Scenario: Level-shifting and isolating UART signals between a 3.3 V diagnostic ECU and 5 V CAN transceiver module in vehicle service tools. IC Role / Device Role / Timing Role: Inverting registered transceiver managing signal direction and timing integrity across voltage domains. Use Value: Supports −40 °C to +125 °C operation and withstands 5 V transients without damage - meets ISO 16750-2 pulse test requirements. |
Use Scenario: Conditioning high-speed digital stimulus/response signals in automated test equipment with mixed-voltage DUTs. IC Role / Device Role / Timing Role: Registered buffer providing glitch-free signal routing and precise edge alignment via latch enable timing. Use Value: Achieves <1.5 ns output skew (tsk(o)) and <9.5 ns disable time (tdis) - preserves signal integrity in 100+ Mbps pattern generation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC544APWRE4 | TSSOP24 package (4.4 mm width); identical electrical specs and pinout; slightly higher thermal resistance. | Better suited for space-constrained PCBs; requires tighter reflow profile due to finer pitch. | Select when board area is limited and thermal derating above 60 °C is acceptable. |
| 74ALVC544MTCX | Higher speed (tpd ≤ 4.2 ns @ 3.3 V); same SO24 footprint; non-5 V tolerant (max VI = VCC + 0.5 V). | Not suitable for 5 V legacy interface; optimized for pure 3.3 V or 2.5 V high-speed buses. | Choose only if 5 V tolerance is unnecessary and sub-5 ns propagation is mandatory. |
Compared with SN74LVC544APWRE4 and 74ALVC544MTCX, the 74LVC544AD,118 uniquely balances 5 V tolerance, industrial temperature range, and SO24 manufacturability - making it optimal for cost-sensitive, mixed-voltage industrial designs requiring proven assembly yield.
Availability
74LVC544AD,118 is available at Aetrix Electronics and suitable for industrial control systems, embedded memory interfaces, automotive diagnostic tools, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LVC544AD,118 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
NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in logic, interface, and power management ICs.
The 74LVC544AD,118 belongs to NXP's LVC (Low-Voltage CMOS) logic family, designed specifically for energy-efficient, mixed-voltage digital system interfacing with robust noise immunity and wide supply flexibility.
FAQ
What is the maximum operating frequency supported by the 74LVC544AD,118?
The 74LVC544AD,118 does not specify a maximum clock frequency but delivers propagation delay (tpd) as low as 3.3 ns at VCC = 3.0–3.6 V. Based on tpd and setup/hold timing (tsu/th ≥ 2.0 ns), it reliably supports data rates up to 100 MHz in properly terminated, low-skew PCB layouts. System-level timing must account for external load capacitance and trace delays.
Does the 74LVC544AD,118 support true bidirectional data flow without external control logic?
Yes - the 74LVC544AD,118 supports independent bidirectional operation via dedicated LEAB/OEAB (A→B) and LEBA/OEBA (B→A) controls. No external logic is needed to manage direction; each path operates autonomously, enabling simultaneous latching and output enable on both sides under separate control signals.
Can the 74LVC544AD,118 be used in a 1.2 V system with 5 V inputs present?
Yes - the 74LVC544AD,118 is explicitly 5 V tolerant on all I/O pins (A0–A7, B0–B7) across its full 1.2 V–3.6 V VCC range. Inputs may safely remain at 5 V while VCC = 1.2 V, with no risk of damage or latch-up, satisfying JEDEC JESD8-7A compliance for low-voltage operation with legacy signal levels.
What is the function of the EAB and EBA pins on the 74LVC544AD,118?
EAB (pin 11) and EBA (pin 23) are active-LOW enable inputs that gate data flow in their respective directions. EAB must be LOW for A-side signals to affect B outputs or latch states; EBA must be LOW for B-side signals to affect A outputs or latches. They provide coarse directional control prior to latch or output enable activation.
Is the 74LVC544AD,118 pin-compatible with older 74-series transceivers like the 74LS544?
No - the 74LVC544AD,118 is not pin-compatible with bipolar 74LS544. While both are octal transceivers, the 74LVC544AD,118 uses a 24-pin SO package with distinct pin assignments (e.g., separate LE/OE/E pins per direction), whereas 74LS544 uses a 20-pin DIP/SO with shared control logic. Direct replacement requires PCB redesign.
74LVC544AD,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVC
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SO
74LVC544AD,118 FAQ
1.How can I place an order for 74LVC544AD,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC544AD,118 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 74LVC544AD,118 reliable?
The price and inventory of 74LVC544AD,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC544AD,118 is usually 5 days.
3.What payment methods are accepted for 74LVC544AD,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC544AD,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC544AD,118?
74LVC544AD,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC544AD,118 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 74LVC544AD,118?
For technical support, including 74LVC544AD,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC544AD,118 requirements.
6.How does Aetrix verify that 74LVC544AD,118 is sourced from the original manufacturer or authorized distributors?
All 74LVC544AD,118 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 74LVC544AD,118 meets industry standards.
7.What is the process for return or replacement of 74LVC544AD,118?
All 74LVC544AD,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC544AD,118, 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 74LVC544AD,118 part is unused and in its original packaging.
Return procedure for 74LVC544AD,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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