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NXP Semiconductors 74LVC544APW,112
- Part No.:
- 74LVC544APW,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LVC544APW,112.pdf
- Description:
- IC TXRX INVERT 3.6V 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,987
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Product details
Overview
74LVC544APW,112 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 74LVC544APW,112 datasheet, 74LVC544APW,112 pinout, 74LVC544APW,112 application, or 74LVC544APW,112 equivalent, key selection criteria include its 24-pin TSSOP package, 3.3 ns typical propagation delay at 3.3 V, 5 V-tolerant inputs/outputs, latch-enable timing constraints (min 2.0 ns pulse width), and JEDEC-compliant voltage ranges (JESD8-7A/5A/C).
Technical Context
The 74LVC544APW,112 implements two independent 8-bit registered transceiver channels - A-to-B and B-to-A - each with dedicated latch enable (LEAB/LEBA) and output enable (OEAB/OEBA) inputs. Its inverting logic path and back-to-back register architecture allow synchronized capture and hold of data on either side before forwarding.
It supports partial power-down operation (high-impedance I/O when VCC = 0 V), complies with JESD8-7A (1.65–1.95 V), JESD8-5A (2.3–2.7 V), and JESD8-C/JESD36 (2.7–3.6 V), and features ESD protection exceeding 2000 V HBM per JESD22-A114F.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.2 V to 3.6 V - Enables direct interface with 1.8 V, 2.5 V, and 3.3 V logic domains without level shifters. |
| I/O Voltage Tolerance | 5 V tolerant - Allows safe connection to legacy 5 V buses while powered from lower VCC. |
| Propagation Delay (tpd) | 3.3 ns typical at VCC = 3.0–3.6 V - Supports high-speed data transfer in synchronous bus applications up to ~150 MHz. |
| Latch Enable Pulse Width (tW) | 2.0 ns minimum at VCC ≥ 3.0 V - Defines shortest valid LEAB/LEBA active-low pulse for reliable data capture. |
| Operating Temperature | −40 °C to +125 °C - Qualified for industrial and extended-temperature embedded control environments. |
| Input Leakage Current | ±20 µA max at VCC = 3.6 V - Ensures low standby current impact in battery-backed or low-power systems. |
| Power Dissipation Capacitance (CPD) | 15.1 pF at VCC = 3.0–3.6 V - Used to calculate dynamic power: PD = CPD × VCC² × fi × N. |
Pinout & Package
TSSOP24 package: plastic thin shrink small outline, 24 leads, body width 4.4 mm (SOT355-1), 0.65 mm pitch, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (LEBA) | B-to-A latch enable input | Active LOW; makes B→A latches transparent when LOW, captures B data on rising edge. |
| 2 (OEBA) | B-to-A output enable input | Active LOW; enables 3-state B-side outputs when LOW; disables (Z) when HIGH. |
| 3–10 (A0–A7) | A-side bidirectional I/O | Data ports for A bus; direction controlled by OEAB/EAB/LEAB states. |
| 11 (EAB) | A-to-B enable input | Active LOW; gates A→B data flow; must be LOW for A inputs to affect B latches/outputs. |
| 12 (GND) | Ground reference | 0 V return path for all internal logic and I/O circuits. |
| 13 (OEAB) | A-to-B output enable input | Active LOW; enables 3-state A→B outputs when LOW; disables (Z) when HIGH. |
| 14 (LEAB) | A-to-B latch enable input | Active LOW; makes A→B latches transparent when LOW, captures A data on rising edge. |
| 15–22 (B7–B0) | B-side bidirectional I/O | Data ports for B bus; direction controlled by OEBA/EBA/LEBA states. |
| 23 (EBA) | B-to-A enable input | Active LOW; gates B→A data flow; must be LOW for B inputs to affect A latches/outputs. |
| 24 (VCC) | Positive supply | Primary power rail; supports 1.2–3.6 V operation with internal regulation for logic levels. |
Key Features
| Feature | Design Value |
|---|---|
| 5 V-tolerant I/O | Enables interoperability with 5 V peripherals while operating from 1.8 V or 3.3 V supplies, eliminating external level translators. |
| Independent bidirectional control | Separate LEAB/OEAB and LEBA/OEBA pins allow asynchronous A→B and B→A data transfers without contention. |
| Back-to-back register architecture | Two sets of D-type latches provide temporary storage on both sides, enabling pipeline staging and bus arbitration. |
| Partial power-down support | I/O pins enter high-impedance state when VCC = 0 V, preventing back-driving during hot-swap or power sequencing. |
| JEDEC-compliant voltage standards | Meets JESD8-7A, -5A, and -C specifications across 1.65–3.6 V range, ensuring compatibility with industry-standard logic families. |
Applications
| Industrial Bus Isolation | Multi-Voltage Microcontroller Interface |
|---|---|
Use Scenario: Isolating a 3.3 V FPGA configuration bus from a 5 V legacy peripheral bus in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional registered transceiver providing glitch-free handshaking and voltage translation between mismatched logic domains. Use Value: Eliminates need for discrete level shifters and reduces PCB area; 5 V tolerance prevents damage during hot-plug events. |
Use Scenario: Interfacing an ARM Cortex-M4 MCU (1.8 V I/O) with a 3.3 V ADC and 5 V display controller on a single PCB. IC Role / Device Role / Timing Role: Octal registered buffer managing simultaneous read/write cycles across three voltage domains using independent OE/LE controls. Use Value: Synchronizes data capture across voltage boundaries with sub-10 ns setup/hold margins, improving system timing margin. |
| Memory Expansion Interface | Test Equipment Signal Conditioning |
Use Scenario: Expanding external SRAM capacity on a 2.5 V SoC-based medical imaging module requiring deterministic access timing. IC Role / Device Role / Timing Role: Registered transceiver latching address/data lines before driving SRAM bus, reducing capacitive loading and skew. Use Value: Improves signal integrity and timing closure at 40 MHz bus speeds; latch enable allows precise alignment with SoC clock edges. |
Use Scenario: Conditioning digital stimulus/response signals in automated test equipment where multiple DUT voltage rails coexist. IC Role / Device Role / Timing Role: Direction-controlled buffer isolating tester logic from DUT I/O during calibration and functional test phases. Use Value: Prevents cross-talk and ground bounce via 3-state control; wide VCC range simplifies power supply design across test fixtures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC544APWR | Same function, identical pinout, TI-manufactured; VCC min = 1.65 V (vs. 1.2 V for NXP); tpd = 3.7 ns typical at 3.3 V. | Not suitable for 1.2 V operation; otherwise interchangeable in 1.65–3.6 V designs with minor timing margin reduction. | Select SN74LVC544APWR only if TI sourcing preference exists and 1.2 V operation is not required. |
| 74ALVC544PW,112 | NXP ALVC variant; higher speed (tpd = 2.5 ns typical at 3.3 V), but narrower VCC range (2.3–3.6 V); no 1.2 V or 5 V tolerance. | Requires 2.3 V minimum supply; unsuitable for 1.8 V or mixed 1.2/1.8 V systems; better for high-speed-only 3.3 V applications. | Choose 74ALVC544PW,112 only when maximum speed is critical and supply voltage is stable ≥2.3 V. |
Compared with SN74LVC544APWR and 74ALVC544PW,112, the 74LVC544APW,112 uniquely supports 1.2 V operation and 5 V-tolerant I/O - essential for ultra-low-power and legacy interface scenarios - while maintaining full pin and functional compatibility within its voltage range.
Availability
74LVC544APW,112 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and multi-voltage embedded systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for 74LVC544APW,112 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The 74LVC544APW,112 belongs to NXP's LVC (Low-Voltage CMOS) logic family, designed for low-power, mixed-voltage interfacing in space-constrained industrial and communications equipment.
FAQ
What is the minimum supply voltage for reliable operation of the 74LVC544APW,112?
The 74LVC544APW,112 operates reliably down to 1.2 V, as specified in Table 5 of the NXP datasheet. At this voltage, it maintains functional behavior including 5 V-tolerant inputs, though propagation delay increases to 17 ns typical. For guaranteed timing performance across temperature, use ≥1.65 V per JESD8-7A compliance.
Does the 74LVC544APW,112 support hot-swap or partial power-down operation?
Yes, the 74LVC544APW,112 supports partial power-down: when VCC = 0 V, all I/O pins enter a high-impedance state, preventing back-current flow and protecting connected circuitry. This feature is explicitly documented in the "Features and benefits" section and verified in static characteristics testing.
Can the 74LVC544APW,112 be used to interface a 3.3 V microcontroller with a 5 V sensor without external level shifters?
Yes - the 74LVC544APW,112 has 5 V-tolerant inputs/outputs and operates from 3.3 V VCC. When configured with OEAB and LEAB active, it safely buffers data from the 5 V sensor to the 3.3 V MCU, meeting VIH/VIL thresholds and avoiding damage or logic misreads.
What is the maximum data rate supported by the 74LVC544APW,112 in transparent mode?
In transparent mode (LEAB/LEBA held LOW), the 74LVC544APW,112 achieves a typical propagation delay of 3.3 ns at 3.3 V, supporting data rates up to ~150 Mbps for non-critical timing paths. For synchronous latch-based operation, setup/hold times (e.g., tsu = 2.0 ns at 3.3 V) define the practical limit for reliable clocked transfers.
Is the 74LVC544APW,112 pin-compatible with other packages in the same family?
Yes - the 74LVC544APW,112 (TSSOP24/SOT355-1), 74LVC544AD (SO24/SOT137-1), and 74LVC544ADB (SSOP24/SOT340-1) share identical pin numbering and electrical functionality. Only mechanical dimensions and thermal characteristics differ; PCB layout must match the selected package footprint.
74LVC544APW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVC
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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-TSSOP
74LVC544APW,112 FAQ
1.How can I place an order for 74LVC544APW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC544APW,112 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 74LVC544APW,112 reliable?
The price and inventory of 74LVC544APW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC544APW,112 is usually 5 days.
3.What payment methods are accepted for 74LVC544APW,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC544APW,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC544APW,112?
74LVC544APW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC544APW,112 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 74LVC544APW,112?
For technical support, including 74LVC544APW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC544APW,112 requirements.
6.How does Aetrix verify that 74LVC544APW,112 is sourced from the original manufacturer or authorized distributors?
All 74LVC544APW,112 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 74LVC544APW,112 meets industry standards.
7.What is the process for return or replacement of 74LVC544APW,112?
All 74LVC544APW,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC544APW,112, 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 74LVC544APW,112 part is unused and in its original packaging.
Return procedure for 74LVC544APW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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