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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

NXP Semiconductors 74LVT16543ADL,518

Name: 74LVT16543ADL,518
Brand: NXP Semiconductors
SKU: 74LVT16543ADL,518
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVT16543ADL,518

Manufacturer:: NXP Semiconductors

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: -

Datasheet:: 74LVT16543ADL,518.pdf

Description:: IC REGISTERED TXRX 16BIT 56SSOP

Quantity:: RFQ Add To RFQ list

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Inventory:3,500

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Product details

Overview

74LVT16543ADL,518 from Nexperia is a 3.3 V 16-bit registered transceiver with 3-state outputs, designed for bidirectional data bus interfacing between asynchronous or synchronous domains. It supports dual 8-bit or single 16-bit operation, features bus-hold inputs eliminating external pull-ups, operates across 2.7 V–3.6 V supply, and delivers ±64 mA output drive. It is used in high-speed backplane and motherboard data routing where level-shifting and latch-controlled data staging are required.

For engineers reviewing the 74LVT16543ADL,518 datasheet, 74LVT16543ADL,518 pinout, 74LVT16543ADL,518 application, or 74LVT16543ADL,518 equivalent, this page provides verified functional architecture, TSSOP56 package mapping, timing-critical enable/latch/output control behavior, bus-hold current specs, and direct 5 V-tolerant I/O interface capability - all confirmed from Nexperia's Rev. 5 (2024) product data sheet.

Technical Context

The device implements two independent 8-bit registered transceiver channels (A↔B), each with separate A-to-B and B-to-A paths controlled by dedicated enable (nEAB/nEBA), latch enable (nLEAB/nLEBA), and output enable (nOEAB/nOEBA) inputs. All control inputs are active LOW and support transparent, latched, and high-impedance states.

Its BiCMOS process enables 3.3 V core operation while tolerating 5.5 V inputs and driving 5 V buses without level shifters. Bus-hold circuitry maintains valid logic states on unused I/Os at ±130 μA hold current, and IOFF functionality ensures partial power-down isolation when VCC = 0 V.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	2.7 V to 3.6 V - Enables compatibility with 3.3 V systems and margin for voltage droop during transient loads.
Input Voltage Tolerance	Up to 5.5 V - Allows direct connection to 5 V TTL buses without external clamping or translation.
Output Drive	+64 mA / –32 mA - Sustains robust signal integrity into heavy capacitive loads or unterminated stubs on backplanes.
Propagation Delay	1.0 ns to 4.8 ns (VCC = 3.3 V) - Supports >200 MHz data rates in transparent mode with sub-nanosecond setup/hold margins.
Bus-Hold Current	±75 μA to ±140 μA (VCC = 3.0 V) - Actively holds floating inputs at valid logic levels, removing need for 10 kΩ pull-up/down resistors.
IOFF Leakage	±100 μA (VCC = 0 V) - Prevents back-driving of powered subsystems during hot-swap or partial power-down sequences.
Operating Temperature	–40 °C to +85 °C - Qualified for industrial-grade embedded control and communications equipment.

Pinout & Package

TSSOP56 (SOT364-1) package: plastic thin shrink small outline, 56 leads, 6.1 mm body width, 0.5 mm lead pitch, 1.2 mm max height - optimized for high-density PCB layouts with thermal and mechanical reliability in automated assembly.

Pin/Terminal	Circuit Role	Design Meaning
1A0–1A7, 2A0–2A7	A-side data I/O	Eight-bit port group A inputs/outputs; connected to local controller or processor bus.
1B0–1B7, 2B0–2B7	B-side data I/O	Eight-bit port group B inputs/outputs; routed to peripheral, memory, or interposer bus.
nOEAB, nOEBA, nOEAB, nOEBA (pins 1, 56, 28, 29)	Output enable (active LOW)	Directly controls 3-state output drivers; HIGH forces high-impedance OFF-state regardless of latch or enable state.
nEAB, nEBA, nEAB, nEBA (pins 3, 54, 26, 31)	Direction enable (active LOW)	Enables A→B or B→A data flow path; must be LOW for transparent or latched operation.
nLEAB, nLEBA, nLEAB, nLEBA (pins 2, 55, 27, 30)	Latch enable (active LOW)	Triggers edge-triggered capture of input data; subsequent LOW-to-HIGH transition freezes outputs until next latch event.
VCC (pins 7, 22, 35, 50)	Power supply	Four distributed supply pins reduce IR drop and improve noise immunity across wide bus.
GND (pins 4, 11, 18, 25, 32, 39, 46, 53)	Ground reference	Eight ground pins provide low-inductance return paths and minimize ground bounce in high-speed switching.

Key Features

Feature	Design Value
16-bit registered transceiver architecture	Two independent 8-bit channels with separate A↔B control logic - enables flexible partitioning for multi-processor or modular backplane designs.
Bus-hold inputs	Eliminates external pull-up resistors on unused data lines, reducing BOM count and PCB area while preventing floating-input metastability.
5 V-tolerant I/O with overvoltage protection	Accepts 0–5.5 V inputs while operating from 3.3 V supply - enables seamless integration with legacy 5 V peripherals without translators.
Live insertion/extraction support	IOFF circuitry and power-up 3-state behavior prevent bus contention during hot-plug events in modular chassis systems.
BiCMOS output stage	Delivers +64 mA sink / –32 mA source drive - sustains signal integrity across long traces or high-fanout loads typical in telecom and industrial backplanes.

Applications

Industrial Backplane Interface

Memory Expansion Module

Use Scenario: Bidirectional data transfer between CPU module and I/O expansion card in a ruggedized PLC rack.

IC Role / Device Role / Timing Role: Registered transceiver providing synchronized, latch-controlled data staging between mismatched clock domains and isolating fault currents.

Use Value: Bus-hold inputs prevent spurious reads during card insertion/removal; 3.3 V/5 V tolerance allows mixed-voltage board stacking without level shifters.

Use Scenario: Interfacing a 3.3 V FPGA controller to legacy 5 V SRAM or Flash memory on an add-in DIMM-style module.

IC Role / Device Role / Timing Role: Level-translating registered buffer that latches address/data before driving memory bus, decoupling FPGA timing from memory access latency.

Use Value: ±64 mA drive ensures clean edges into 5 V memory load; IOFF prevents backfeed when memory module is powered down independently.

Telecom Line Card Data Mux

Test Equipment Signal Routing

Use Scenario: Aggregating parallel status and control signals from multiple DSPs onto a shared diagnostic bus in a 1RU line card.

IC Role / Device Role / Timing Role: 16-bit bidirectional multiplexer with independent A/B channel enables time-sliced monitoring without bus contention.

Use Value: Sub-5 ns propagation delay preserves timing margins in real-time diagnostics; 8 GND pins suppress simultaneous switching noise in dense RF environments.

Use Scenario: Reconfigurable signal path selection in automated test equipment (ATE) for DUT interface adaptation.

IC Role / Device Role / Timing Role: Latch-enabled transceiver acting as programmable bus switch - captures stimulus vectors then drives DUT under test with deterministic timing.

Use Value: Transparent + latched modes allow both real-time and burst-mode stimulus delivery; power-up 3-state prevents initialization glitches on shared test harnesses.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit registered transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC16543DGGR	Lower drive (+24 mA/–24 mA), narrower VCC range (1.65 V–3.6 V), no bus-hold	Suitable for low-power portable systems but requires external pull-ups and cannot drive heavy 5 V loads	Select only if system uses 1.8 V logic and does not require 5 V tolerance or high-current drive.
74ALVCH16543T	Higher speed (tpd ≤ 2.5 ns @ 3.3 V), same 3.3 V supply, no 5 V tolerance	Optimized for ultra-low-latency FPGA interconnects where 5 V compatibility is unnecessary	Choose when maximum timing margin is critical and all connected devices operate strictly at 3.3 V.

Compared with SN74LVC16543DGGR and 74ALVCH16543T, the 74LVT16543ADL,518 uniquely combines 5 V-tolerant I/O, ±64 mA drive, and integrated bus-hold - making it the only option among the three qualified for mixed-voltage industrial backplane interfaces requiring robustness and zero-external-BOM simplicity.

Availability

74LVT16543ADL,518 is available at Aetrix Electronics and suitable for industrial backplane design, telecom line card development, memory expansion modules, and automated test equipment requiring stable component supply across extended temperature and mixed-voltage conditions.

Supply support for 74LVT16543ADL,518 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

Nexperia is a global semiconductor expert focused on high-performance, reliable standard logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74LVT series targets high-speed 3.3 V logic interfacing with 5 V legacy systems, emphasizing robustness, latch-controlled data staging, and bus-hold functionality for mission-critical industrial and telecom infrastructure.

FAQ

What is the maximum clock rate supported by the 74LVT16543ADL,518 in transparent mode?

The device achieves 1.0 ns minimum propagation delay (tpd) at VCC = 3.3 V, enabling reliable operation up to 250 MHz in transparent mode when combined with appropriate setup/hold margins. Measured tpd values range from 1.0 ns to 3.7 ns depending on VCC and loading; actual maximum frequency depends on PCB trace length, fanout, and termination.

Does the 74LVT16543ADL,518 require external pull-up resistors on unused data lines?

No. The device integrates bus-hold circuitry on all data I/O pins (1A0–1A7, 2A0–2A7, 1B0–1B7, 2B0–2B7), providing ±75 μA to ±140 μA holding current to maintain valid logic states without external components - confirmed in Table 6 of the Nexperia datasheet Rev. 5.

Can the 74LVT16543ADL,518 safely interface with a 5 V microcontroller while powered from 3.3 V?

Yes. Its inputs tolerate up to 5.5 V regardless of VCC, and its outputs drive 5 V buses directly due to overvoltage-tolerant I/O structure and IOFF protection. This eliminates level shifters in mixed-voltage designs - verified in Sections 1, 2, and Table 4 of the official datasheet.

How does the latch enable (nLEAB/nLEBA) function differ from the direction enable (nEAB/nEBA)?

nEAB/nEBA enables the A↔B data path (LOW = active), while nLEAB/nLEBA controls whether data flows transparently (LOW) or is latched on the rising edge (LOW-to-HIGH transition). Both must be LOW for transparent operation; only nLEAB/nLEBA toggling captures and holds data - per Table 3 functional description in the datasheet.

74LVT16543ADL,518 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

Logic Type:: -

Number of Elements:: -

Number of Bits per Element:: -

Input Type:: -

Output Type:: -

Current - Output High, Low:: -

Voltage - Supply:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

74LVT16543ADL,518 FAQ

1.How can I place an order for 74LVT16543ADL,518 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVT16543ADL,518 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 74LVT16543ADL,518 reliable?

The price and inventory of 74LVT16543ADL,518 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT16543ADL,518 is usually 5 days.

3.What payment methods are accepted for 74LVT16543ADL,518?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT16543ADL,518 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVT16543ADL,518?

74LVT16543ADL,518 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVT16543ADL,518 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 74LVT16543ADL,518?

For technical support, including 74LVT16543ADL,518 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT16543ADL,518 requirements.

6.How does Aetrix verify that 74LVT16543ADL,518 is sourced from the original manufacturer or authorized distributors?

All 74LVT16543ADL,518 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 74LVT16543ADL,518 meets industry standards.

7.What is the process for return or replacement of 74LVT16543ADL,518?

All 74LVT16543ADL,518 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT16543ADL,518, 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 74LVT16543ADL,518 part is unused and in its original packaging.

Return procedure for 74LVT16543ADL,518:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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