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NXP Semiconductors 74LVC543AD,112
- Part No.:
- 74LVC543AD,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74LVC543AD,112.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 24SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,908
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Product details
Overview
74LVC543AD,112 from NXP Semiconductors (formerly Philips) is an octal D-type registered transceiver with 3-state outputs, operating from 1.2 V to 3.6 V supply, supporting bidirectional data flow with independent A→B and B→A latch and output enables, and featuring 5 V tolerant I/O for mixed-voltage bus interfacing in industrial control backplanes.
For engineers reviewing the 74LVC543AD,112 datasheet, 74LVC543AD,112 pinout, 74LVC543AD,112 application, or 74LVC543AD,112 equivalent, this device delivers precise timing-controlled bidirectional data latching with sub-10 ns propagation delay at 3.3 V, high-impedance isolation during power-down, and JEDEC JESD8-B compliance for robust 3.3 V/5 V system integration.
Technical Context
The 74LVC543AD,112 implements dual independent 8-bit register paths - one for A-to-B and one for B-to-A data flow - each with dedicated latch enable (LEAB/LEBA) and output enable (OEAB/OEBA) controls. Its Si-gate CMOS architecture ensures low dynamic power via CPD = 15.0 pF per latch (outputs enabled) and supports simultaneous transparent, latched, and high-Z states.
It operates across −40 °C to +125 °C, meets JEDEC JESD8-B/JESD36 standards, and provides 5 V tolerant inputs/outputs while powered from as low as 1.2 V, enabling direct interface with legacy TTL and 5 V logic without level shifters. ESD protection exceeds 2000 V HBM and 200 V MM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.2 V to 3.6 V - enables operation in ultra-low-power and mixed-voltage systems without external regulators |
| Propagation Delay (An↔Bn) | 1.0 ns (min) to 7.0 ns (max) at VCC = 3.0–3.6 V - ensures tight timing margins in high-speed bus applications |
| I/O Voltage Tolerance | 0 V to 5.5 V - allows safe connection to 5 V buses while powered from 1.2–3.6 V supplies |
| 3-State Output Enable Time | 1.3 ns (typ) to 10.0 ns (max) - guarantees rapid bus arbitration and conflict avoidance |
| Input Capacitance | 4.0 pF - minimizes loading on driving sources and preserves signal integrity |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood automotive, industrial PLC, and harsh-environment embedded use |
| Power Dissipation Capacitance | 15.0 pF per latch (outputs enabled) - enables accurate dynamic power estimation for thermal design |
Pinout & Package
74LVC543AD,112 is housed in a plastic small outline package (SO24), SOT137-1, with 24 leads, 7.5 mm body width, and standard 1.27 mm pitch. Pin 1 is marked by an index area; the package is RoHS-compliant and rated for reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | LEBA | B-to-A latch enable (active LOW) - controls transparency/latching of B→A data path independently |
| 2 | OEBA | B-to-A output enable (active LOW) - places B-side outputs in high-impedance state when HIGH |
| 3–10 | A0–A7 | A-side bidirectional data terminals - serve as inputs when data flows A→B, outputs when B→A |
| 11 | EAB | A-to-B enable (active LOW) - gates data flow direction; must be LOW for A→B operation |
| 12 | GND | Ground reference - common return for all signals and power |
| 13 | OEAB | A-to-B output enable (active LOW) - disables A→B outputs into high-Z state |
| 14 | LEAB | A-to-B latch enable (active LOW) - captures A-data on rising edge; holds value until next latch event |
| 15–22 | B7–B0 | B-side bidirectional data terminals - function as outputs during A→B transfer, inputs during B→A |
| 23 | EBA | B-to-A enable (active LOW) - enables B→A data flow when asserted |
| 24 | VCC | Positive supply - powers internal logic; high-impedance outputs remain stable even when VCC = 0 V |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 8-bit registers | Enables concurrent A→B and B→A data storage without interference - critical for full-duplex bus buffering |
| 5 V tolerant I/O | Eliminates need for external level translators when interfacing with 5 V peripherals or legacy controllers |
| Back-to-back latch architecture | Supports pipelined data capture: one register latches incoming data while the other drives the bus - reduces latency |
| High-impedance on power loss | Outputs enter high-Z state when VCC = 0 V - prevents back-driving and protects downstream circuitry during brownout |
| JEDEC JESD8-B compliance | Guarantees interoperability with industry-standard 3.3 V logic families and simplifies qualification in regulated systems |
Applications
| Industrial Backplane Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Bidirectional communication between microcontroller and isolated I/O expansion cards across a 24-pin parallel backplane. IC Role / Device Role / Timing Role: Registered transceiver providing synchronized, glitch-free data handshaking with independent A→B/B→A control. Use Value: Eliminates bus contention via 3-state isolation and ensures deterministic timing with ≤7 ns propagation delay at 3.3 V. |
Use Scenario: Interfacing a 3.3 V CAN controller MCU with 5 V sensor cluster over a shared diagnostic bus. IC Role / Device Role / Timing Role: Voltage-tolerant transceiver enabling reliable data exchange without level-shifting components. Use Value: 5 V tolerant I/O withstands sensor-side voltage spikes while maintaining <10 ns timing skew across all 8 channels. |
| Programmable Logic Controller (PLC) I/O Hub | Test Equipment Digital Pattern Generator |
Use Scenario: Buffering and latching digital I/O signals between FPGA-based logic and field-side 24 V discrete inputs/outputs. IC Role / Device Role / Timing Role: Registered interface isolating FPGA timing domain from noisy industrial environments. Use Value: Independent OE/LE controls allow precise synchronization of input sampling and output update cycles. |
Use Scenario: Generating and capturing high-fidelity 8-bit test vectors on a PCB-level functional tester with programmable timing. IC Role / Device Role / Timing Role: Latched transceiver acting as a programmable I/O port with deterministic setup/hold windows. Use Value: Verified set-up time of +1.5 ns and hold time of 0.6 ns at 3.3 V support sub-100 MHz pattern rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC823APW | Single-direction 8-bit latch with separate clock and output enable; no B→A path or dual-enable architecture | Lacks bidirectional capability - suitable only for unidirectional data capture, not bus transceivers | Select only when A→B flow suffices and B→A feedback is handled elsewhere |
| 74ALVC162245 | 16-bit non-latched transceiver; no internal registers; higher drive strength (±24 mA vs ±12 mA at 2.7 V) | Requires external clocking logic for registration; better for raw throughput than timing-critical latching | Choose for wider buses where registration is implemented upstream, not within the transceiver |
Compared with SN74LVC823APW and 74ALVC162245, the 74LVC543AD,112 uniquely integrates dual-path latching and independent directional control in a single SO24 package - essential for synchronous bidirectional bus arbitration without added logic or layout complexity.
Availability
74LVC543AD,112 is available at Aetrix Electronics and suitable for industrial backplane interfaces, automotive body control modules, and PLC I/O hubs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LVC543AD,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, formerly Philips Semiconductors, designs high-reliability logic and interface ICs for automotive, industrial, and communications markets, with leadership in low-voltage CMOS process technology.
The 74LVC543AD,112 belongs to the LVC (Low-Voltage CMOS) family, engineered for robust mixed-signal interfacing in energy-efficient systems demanding 1.2–3.6 V operation, 5 V tolerance, and extended temperature resilience.
FAQ
What is the maximum operating temperature range for the 74LVC543AD,112?
The 74LVC543AD,112 is fully specified from −40 °C to +125 °C, making it suitable for under-hood automotive applications and industrial environments with elevated ambient temperatures. This rating is confirmed in the "Recommended Operating Conditions" table of the official datasheet, and applies across the full supply voltage range of 1.2 V to 3.6 V.
Does the 74LVC543AD,112 support 5 V logic levels on its I/O pins?
Yes, the 74LVC543AD,112 features 5 V tolerant inputs and outputs, allowing safe connection to 5 V buses while powered from as low as 1.2 V. This is explicitly stated in the "Features" section and verified in the "Limiting Values" table, where VI and VO (3-state) are rated up to 5.5 V regardless of VCC.
How does the 74LVC543AD,112 handle power-down conditions?
When VCC = 0 V, the 74LVC543AD,112 automatically places all outputs in high-impedance state, preventing back-driving of the bus. This behavior is guaranteed in the "Features" list and supported by the "High-impedance when VCC = 0 V" specification - a key safety feature for hot-swap and brownout scenarios.
What is the typical propagation delay of the 74LVC543AD,112 at 3.3 V?
At VCC = 3.3 V and Tamb = 25 °C, the typical propagation delay (tPHL/tPLH) for An↔Bn paths is 3.0 ns, as measured with CL = 50 pF. This value is listed in the "Quick Reference Data" table and confirmed across the full −40 °C to +125 °C range with a maximum of 9.0 ns.
Is the 74LVC543AD,112 pin-compatible with other packages in the 74LVC543A family?
No - the 74LVC543AD,112 uses the SO24 (SOT137-1) package, while variants like 74LVC543ADB (SSOP24), 74LVC543APW (TSSOP24), and 74LVC543ABQ (DHVQFN24) have different footprints and thermal characteristics. Though functionally identical, they are not mechanically interchangeable without PCB redesign.
74LVC543AD,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVC
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, Non-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
74LVC543AD,112 FAQ
1.How can I place an order for 74LVC543AD,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC543AD,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 74LVC543AD,112 reliable?
The price and inventory of 74LVC543AD,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC543AD,112 is usually 5 days.
3.What payment methods are accepted for 74LVC543AD,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC543AD,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC543AD,112?
74LVC543AD,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC543AD,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 74LVC543AD,112?
For technical support, including 74LVC543AD,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC543AD,112 requirements.
6.How does Aetrix verify that 74LVC543AD,112 is sourced from the original manufacturer or authorized distributors?
All 74LVC543AD,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 74LVC543AD,112 meets industry standards.
7.What is the process for return or replacement of 74LVC543AD,112?
All 74LVC543AD,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC543AD,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 74LVC543AD,112 part is unused and in its original packaging.
Return procedure for 74LVC543AD,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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