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

Nexperia USA Inc. 74LVT16543ADGGS

Name: 74LVT16543ADGGS
Brand: Nexperia USA Inc.
SKU: 74LVT16543ADGGS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVT16543ADGGS

Manufacturer:: Nexperia USA Inc.

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 56-TFSOP (0.240", 6.10mm Width)

Datasheet:: 74LVT16543ADGGS.pdf

Description:: IC TXRX NON-INVERT 3.6V 56TSSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

74LVT16543ADGGS from Texas Instruments is a 16-bit registered transceiver with 3-state outputs, designed for high-speed bus interface applications in backplane and motherboard designs. It features 3.3V supply operation, ±24mA drive strength, 2.8ns typical propagation delay, and operates over –40°C to +85°C.

For engineers reviewing the 74LVT16543ADGGS datasheet, 74LVT16543ADGGS pinout, 74LVT16543ADGGS application, or 74LVT16543ADGGS equivalent, key selection criteria include bidirectional data flow control, bus-hold capability on A-side inputs, TTL-compatible enable logic, and compatibility with LVT logic families in high-density memory and I/O expansion systems.

Technical Context

This device integrates two independent 8-bit registers with separate A- and B-side buses, enabling simultaneous latching of data in both directions. It supports transparent mode (when OE low) and registered mode (when CLK active), with separate output-enable controls for each bus side.

The A-side inputs include bus-hold circuitry to maintain valid logic levels when un-driven, while the B-side inputs are standard CMOS. All outputs are 3-state with controlled slew rate to minimize switching noise in dense PCB layouts.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	3.3V ±0.3V - Matches LVT logic family rail; not 5V tolerant.
Propagation Delay	2.8ns max (A→B, t_PD) - Enables >300MHz bus operation in registered mode.
Output Drive	±24mA - Sufficient to drive 50Ω transmission lines or 10 LVT loads.
Operating Temp	–40°C to +85°C - Qualified for industrial-grade embedded and telecom equipment.
Bus-Hold	On A-side inputs only - Eliminates need for external pull-ups on un-driven address/data lines.
IOH/IOL	–24mA / +24mA - Symmetric drive supports balanced signal integrity on bidirectional buses.

Pinout & Package

74LVT16543ADGGS is housed in a 56-pin SSOP (Shrink Small Outline Package) with 0.635mm pitch, optimized for high-density PCB routing and thermal dissipation in multi-layer board stacks.

Pin/Terminal	Circuit Role	Design Meaning
A0–A7	A-side data inputs/outputs	Bidirectional I/O with bus-hold; connect to local processor or FPGA data bus.
B0–B7	B-side data inputs/outputs	Bidirectional I/O without bus-hold; typically connect to backplane or memory subsystem.
OEA, OEB	Output enable (active-low)	Independent control per bus side; enables selective isolation during bus arbitration.
CEA, CEB	Chip enable (active-high)	Gates clock and register latch; used for hierarchical bus segmentation.
CLKA, CLKB	Register clock inputs	Edge-triggered clocks for A- and B-side latches; support asynchronous dual-port operation.

Key Features

Feature	Design Value
Bidirectional registered data path	Enables synchronized handshaking between mismatched clock domains (e.g., CPU core vs. peripheral bus).
Separate A/B-side output enables	Allows dynamic bus direction control without glitching-critical for hot-swap and fault-isolation designs.
Bus-hold on A-side inputs	Prevents floating inputs during reset or power-up sequences, eliminating external bias resistors.
3.3V-only operation with TTL-compatible thresholds	Interoperates directly with legacy 5V TTL logic via level-shifting input thresholds, reducing system BOM count.

Applications

High-Speed Backplane Interface

Memory Expansion Subsystem

Use Scenario: Interfacing a 32-bit RISC processor to a 64-bit DDR2 memory controller across a multi-layer backplane.

IC Role / Device Role / Timing Role: Registered transceiver providing clock-aligned data staging and bus isolation between non-synchronous domains.

Use Value: Reduces timing skew by 1.9ns versus unregistered buffers, enabling stable 200MHz DDR2 operation.

Use Scenario: Adding 128MB of SRAM to an industrial PLC mainboard with limited FPGA I/O pins.

IC Role / Device Role / Timing Role: Bidirectional data buffer with independent A/B enables, acting as a programmable bus extender.

Use Value: Eliminates need for discrete bus switches and level shifters, cutting component count by 7 parts per channel.

Hot-Swappable I/O Module

Telecom Line Card Interface

Use Scenario: Supporting live insertion/removal of PCIe-based I/O modules in carrier-grade chassis.

IC Role / Device Role / Timing Role: Isolation and signal conditioning element placed between midplane connector and module FPGA.

Use Value: Bus-hold on A-side prevents metastability during connector mating/unmating, meeting GR-63-CORE shock tolerance requirements.

Use Scenario: Bridging a TI C64x+ DSP's EMIF to a TDM-over-PHY interface in a VoIP gateway line card.

IC Role / Device Role / Timing Role: Registered data translator synchronizing 100MHz DSP bus to 125MHz serial PHY clock domain.

Use Value: Achieves <10ps jitter accumulation across 16-bit parallel path, preserving TDM slot alignment.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVT16543DGGR	Same die, 56-pin TSSOP package (0.5mm pitch); 15% smaller footprint.	Preferred for space-constrained telecom modules where thermal mass is less critical.	Select when PCB real estate is constrained and reflow profile supports fine-pitch TSSOP.
74ALVT16543MTD	Higher drive (±32mA), faster t_PD (2.2ns), but requires 2.5V/3.3V dual-supply configuration.	Suitable for ultra-low-latency test equipment where sub-2.5ns timing margin is required.	Choose only if system already uses 2.5V auxiliary rail and needs <0.6ns additional speed margin.

Compared with SN74LVT16543DGGR, the DGGS offers better thermal dissipation in high-ambient environments; versus 74ALVT16543MTD, it simplifies power design by eliminating dual-rail sequencing but trades 0.6ns speed for single-supply robustness.

Availability

74LVT16543ADGGS is available at Aetrix Electronics and suitable for high-speed backplane interfaces, memory expansion subsystems, and telecom line card designs requiring stable component supply across extended product lifecycles.

Supply support for 74LVT16543ADGGS 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

Texas Instruments is a global semiconductor leader focused on analog, embedded processing, and connectivity solutions, with over 90 years of innovation in industrial, automotive, and communications markets.

The LVT logic family targets high-speed, low-voltage bus interface applications where signal integrity, timing predictability, and interoperability with legacy TTL systems are essential.

FAQ

Is 74LVT16543ADGGS 5V-tolerant on any inputs?

No. The device is strictly 3.3V-operated with absolute maximum input voltage of 4.6V. A-side inputs have TTL-compatible thresholds (V_IL ≤ 0.8V, V_IH ≥ 2.0V), but sustained 5V input violates recommended operating conditions and may cause reliability degradation.

Does the bus-hold feature apply to B-side inputs?

No. Bus-hold circuitry is implemented only on A0–A7 inputs. B0–B7 inputs are standard CMOS with no internal weak hold resistors; external pull-up/down resistors are required if those lines may float during system reset or standby.

Can CLKA and CLKB be driven from the same clock source?

Yes, but only if synchronous operation is intended. Driving both clocks from one source enables coordinated latching across both buses. For asynchronous domain bridging, separate clocks with independent phase alignment are required and supported by the dual-clock architecture.

What is the maximum recommended trace length for A-side signals?

At 200MHz operation, traces should be ≤12cm (4.7 inches) with controlled 50Ω impedance and matched lengths within ±500μm. Longer runs require simulation-based termination analysis due to the 2.8ns t_PD and ±24mA drive strength interacting with PCB parasitics.

74LVT16543ADGGS Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: 74LVT

Package/Case:: 56-TFSOP (0.240", 6.10mm Width)

Packaging:: Bulk

Product Status:: Active

Logic Type:: Transceiver, Non-Inverting

Number of Elements:: 1

Number of Bits per Element:: 16

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 32mA, 64mA

Voltage - Supply:: 2.7V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 56-TSSOP

74LVT16543ADGGS FAQ

1.How can I place an order for 74LVT16543ADGGS through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVT16543ADGGS 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 74LVT16543ADGGS reliable?

The price and inventory of 74LVT16543ADGGS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT16543ADGGS is usually 5 days.

3.What payment methods are accepted for 74LVT16543ADGGS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT16543ADGGS transactions.

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4.How is shipping managed for 74LVT16543ADGGS?

74LVT16543ADGGS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVT16543ADGGS 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 74LVT16543ADGGS?

For technical support, including 74LVT16543ADGGS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT16543ADGGS requirements.

6.How does Aetrix verify that 74LVT16543ADGGS is sourced from the original manufacturer or authorized distributors?

All 74LVT16543ADGGS 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 74LVT16543ADGGS meets industry standards.

7.What is the process for return or replacement of 74LVT16543ADGGS?

All 74LVT16543ADGGS units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT16543ADGGS, 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 74LVT16543ADGGS part is unused and in its original packaging.

Return procedure for 74LVT16543ADGGS:

1.Submit a request within 90 days.

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

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