Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Texas Instruments SN74LVT16543DL

Name: SN74LVT16543DL
Brand: Texas Instruments
SKU: SN74LVT16543DL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SN74LVT16543DL

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 56-BSSOP (0.295", 7.50mm Width)

Datasheet:: SN74LVT16543DL.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:1,108

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SN74LVT16543DL from Texas Instruments is a 16-bit registered transceiver IC designed for 3.3-V V_CC operation with mixed-mode 5-V input/output tolerance, supporting bidirectional data flow between 3.3-V and 5-V systems. It features dual 8-bit registers with independent latch-enable (LEAB/LEBA) and output-enable (OEAB/OEBA) controls, bus-hold inputs eliminating external pullups, and operates from −40°C to 85°C.

For engineers reviewing the SN74LVT16543DL datasheet, SN74LVT16543DL pinout, SN74LVT16543DL application, or SN74LVT16543DL equivalent, this device is critical for voltage-level translation in high-speed backplane interfaces, memory expansion buses, and FPGA-to-ASIC interconnects where signal integrity, low ground bounce (<0.8 V), and live insertion support are required.

Technical Context

The SN74LVT16543DL implements two independent 8-bit register sections (A↔B), each with dedicated CE, LE, and OE control lines enabling asynchronous latching and 3-state output control. Its Advanced BiCMOS Technology (ABT) delivers low static power dissipation while maintaining TTL-compatible thresholds at 3.3-V supply.

It supports unregulated battery operation down to 2.7 V, includes distributed V_CC/GND pins to minimize switching noise, and uses a flow-through architecture for optimized PCB layout. Bus-hold circuitry actively maintains valid logic levels on floating A/B port inputs without external components.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7 V to 3.6 V - Enables stable operation across wide battery discharge profiles and noisy supply rails.
I_OL / I_OH	64 mA / −32 mA - Drives heavy capacitive loads (e.g., long traces, multiple inputs) without signal degradation.
V_OL @ I_OL=64 mA	0.55 V max - Ensures robust low-level margin in 3.3-V LVTTL systems with 0.4-V noise immunity.
t_PLH/t_PHL	2.7 ns / 2.9 ns typ - Supports >300-MHz data rates in point-to-point or stubbed bus topologies.
Input Voltage Range	−0.5 V to 7 V - Accepts 5-V TTL signals directly into 3.3-V domain without level-shifter ICs.
Bus-Hold Current	±75 µA - Maintains defined logic state on unused data lines, preventing metastability in hot-swap scenarios.
Ground Bounce (V_OLP)	<0.8 V @ V_CC=3.3 V - Reduces simultaneous switching noise in dense PCB layouts with multiple outputs switching.

Pinout & Package

SN74LVT16543DL is housed in a 56-pin Shrink Small-Outline Package (SSOP-DL), 300-mil body width, 0.5-mm lead pitch, with gull-wing leads and JEDEC MO-153 compliance. Pin 1 located at top-left corner with molded index mark.

Pin/Terminal	Circuit Role	Design Meaning
1OEAB, 2OEAB, 1OEBA, 2OEBA	Output Enable (active-low)	Individually disables 3-state B or A outputs per 8-bit section; tied to V_CC via pullup for power-up high-Z safety.
1LEAB, 2LEAB, 1LEBA, 2LEBA	Latch Enable (active-low)	Controls transparent vs. storage mode for A→B or B→A data latches; edge-triggered on low-to-high transition.
1CEAB, 2CEAB, 1CEBA, 2CEBA	Chip Enable (active-low)	Gates data entry and output enable; must be low for any A↔B transfer or output activation.
A1–A8, B1–B8 (×2 sections)	Bidirectional Data Ports	16 total I/Os with bus-hold; tolerate 5-V inputs while sourcing/sinking 3.3-V LVTTL levels.
V_CC, GND (×8 each)	Distributed Power/Ground	Minimizes IR drop and high-frequency noise by interleaving supply/ground pins across package edges.

Key Features

Feature	Design Value
Mixed-mode 5-V tolerant I/O	Enables direct interface between legacy 5-V logic and modern 3.3-V FPGAs/ASICs without external translators.
Independent dual 8-bit control	Allows asymmetric data flow: e.g., A→B latched while B→A remains transparent, supporting burst-mode protocols.
Bus-hold on all data inputs	Eliminates need for 10-kΩ pullup/pulldown resistors on unused A/B lines, reducing BOM count and board area.
Live insertion support	Prevents bus contention during hot-plug events via controlled output disable sequencing and robust ESD protection.
Flow-through pinout	Input and output pins aligned on opposite sides of package, simplifying layer routing and minimizing trace crossovers.

Applications

Backplane Interconnect	FPGA-to-ASIC Bridge
Use Scenario: High-speed data transfer between line cards in telecom chassis with mixed-voltage subsystems. IC Role / Device Role / Timing Role: Registered transceiver providing synchronized, noise-immune 16-bit parallel data handoff between 5-V control plane and 3.3-V processing modules. Use Value: Eliminates timing skew across 16-bit bus using common clock-domain latching and reduces ground bounce-induced bit errors in multi-card environments.	Use Scenario: Configurable logic interface between Xilinx Kintex FPGA and TI C66xx DSP with mismatched I/O voltage standards. IC Role / Device Role / Timing Role: Bidirectional level translator with independent latch enables allowing FPGA to capture DSP status while streaming real-time data. Use Value: Enables deterministic setup/hold timing via separate LEAB/LEBA controls, avoiding metastability in cross-clock-domain transfers.
Memory Expansion Bus	Industrial PLC I/O Module
Use Scenario: Extending SRAM or Flash memory width in embedded controllers requiring >8-bit data paths. IC Role / Device Role / Timing Role: Registered buffer isolating CPU address/data bus from memory array, with CE-driven enable gating for bank selection. Use Value: Provides clean, slew-controlled outputs driving 10+ memory inputs while maintaining <2.9 ns propagation delay for sub-200-MHz access cycles.	Use Scenario: Isolating field-side 24-V digital inputs from 3.3-V microcontroller in programmable logic controller backplane. IC Role / Device Role / Timing Role: Input register capturing opto-isolated sensor states, then buffering to MCU via 3.3-V bus with bus-hold preventing floating reads. Use Value: Guarantees valid logic levels during sensor cable disconnect/reconnect events without software polling or external debouncing circuits.

Backplane Interconnect

FPGA-to-ASIC Bridge

Use Scenario: High-speed data transfer between line cards in telecom chassis with mixed-voltage subsystems.

IC Role / Device Role / Timing Role: Registered transceiver providing synchronized, noise-immune 16-bit parallel data handoff between 5-V control plane and 3.3-V processing modules.

Use Value: Eliminates timing skew across 16-bit bus using common clock-domain latching and reduces ground bounce-induced bit errors in multi-card environments.

Use Scenario: Configurable logic interface between Xilinx Kintex FPGA and TI C66xx DSP with mismatched I/O voltage standards.

IC Role / Device Role / Timing Role: Bidirectional level translator with independent latch enables allowing FPGA to capture DSP status while streaming real-time data.

Use Value: Enables deterministic setup/hold timing via separate LEAB/LEBA controls, avoiding metastability in cross-clock-domain transfers.

Memory Expansion Bus

Industrial PLC I/O Module

Use Scenario: Extending SRAM or Flash memory width in embedded controllers requiring >8-bit data paths.

IC Role / Device Role / Timing Role: Registered buffer isolating CPU address/data bus from memory array, with CE-driven enable gating for bank selection.

Use Value: Provides clean, slew-controlled outputs driving 10+ memory inputs while maintaining <2.9 ns propagation delay for sub-200-MHz access cycles.

Use Scenario: Isolating field-side 24-V digital inputs from 3.3-V microcontroller in programmable logic controller backplane.

IC Role / Device Role / Timing Role: Input register capturing opto-isolated sensor states, then buffering to MCU via 3.3-V bus with bus-hold preventing floating reads.

Use Value: Guarantees valid logic levels during sensor cable disconnect/reconnect events without software polling or external debouncing circuits.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVTH16543DGGR	Lower drive strength (I_OL = 24 mA), LVCMOS input thresholds, no 5-V tolerance.	Suitable only for pure 3.3-V systems; cannot interface to 5-V peripherals.	Select when cost and power are prioritized over mixed-voltage compatibility.
74ALVC164245DGGR	Non-latched, direction-controlled transceiver; no register functionality or bus-hold.	Requires external clocking and pullup resistors; unsuitable for synchronous capture or floating-bus scenarios.	Choose only for simple level translation where data registration is handled elsewhere.

Compared with SN74LVTH16543DGGR and 74ALVC164245DGGR, the SN74LVT16543DL uniquely combines 5-V-tolerant I/O, integrated bus-hold, and dual independent latch control-making it irreplaceable in mixed-voltage, hot-swap, or metastability-sensitive designs where external components and timing complexity must be minimized.

Availability

SN74LVT16543DL is available at Aetrix Electronics and suitable for industrial backplane interconnects, FPGA-based prototyping platforms, and automotive infotainment head-unit memory expansion requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for SN74LVT16543DL 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 specializing in analog, embedded processing, and logic solutions, with decades of expertise in high-reliability interface ICs and advanced BiCMOS process technology.

The SN74LVT16543DL belongs to TI's Widebus™ family of registered transceivers, engineered specifically for voltage-level bridging and noise-resilient data transfer in mixed-signal industrial, telecom, and computing infrastructure.

FAQ

What is the maximum operating temperature range for the SN74LVT16543DL?

The SN74LVT16543DL is characterized for operation from −40°C to +85°C ambient temperature. This industrial-grade rating ensures reliable performance in demanding environments such as factory automation controllers, outdoor telecom equipment, and vehicle infotainment systems where thermal cycling and extended temperature exposure occur.

Does the SN74LVT16543DL require external pullup resistors on its data inputs?

No - the SN74LVT16543DL integrates active bus-hold circuitry on all A and B port inputs, maintaining valid logic levels on floating or unused lines without external pullup or pulldown resistors. This feature reduces BOM count, saves PCB space, and eliminates risk of incorrect biasing during power-up or hot-swap events.

Can the SN74LVT16543DL interface directly with 5-V TTL logic?

Yes - the SN74LVT16543DL accepts input voltages up to 7 V and tolerates 5-V signals on all A and B port inputs while operating from a 3.3-V V_CC. Its input thresholds align with TTL specifications, enabling seamless connection to legacy 5-V microcontrollers, EPROMs, and peripheral ICs without level-shifting circuitry.

How does the SN74LVT16543DL handle power-up sequencing to avoid bus contention?

The SN74LVT16543DL ensures high-impedance outputs at power-up by design: OE inputs default to inactive (high) unless pulled low. TI recommends tying OEAB/OEBA to V_CC via a pullup resistor (value determined by driver sink capability) to guarantee 3-state behavior until firmware asserts control - preventing unintended data leakage or bus conflicts.

What package type is used for the SN74LVT16543DL, and what are its key mechanical dimensions?

The SN74LVT16543DL uses a 56-pin Shrink Small-Outline Package (SSOP-DL) with 300-mil body width, 0.5-mm lead pitch, and 1.2-mm max height. Its JEDEC MO-153 compliant footprint features gull-wing leads, pin 1 identification notch, and distributed V_CC/GND pins optimized for low-noise PCB layout in high-density applications.

SN74LVT16543DL Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVT

Package/Case:: 56-BSSOP (0.295", 7.50mm Width)

Packaging:: Bulk

Product Status:: Active

Logic Type:: Transceiver, Non-Inverting

Number of Elements:: 2

Number of Bits per Element:: 8

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-SSOP

SN74LVT16543DL FAQ

1.How can I place an order for SN74LVT16543DL through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVT16543DL 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 SN74LVT16543DL reliable?

The price and inventory of SN74LVT16543DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVT16543DL is usually 5 days.

3.What payment methods are accepted for SN74LVT16543DL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVT16543DL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74LVT16543DL?

SN74LVT16543DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVT16543DL 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 SN74LVT16543DL?

For technical support, including SN74LVT16543DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVT16543DL requirements.

6.How does Aetrix verify that SN74LVT16543DL is sourced from the original manufacturer or authorized distributors?

All SN74LVT16543DL 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 SN74LVT16543DL meets industry standards.

7.What is the process for return or replacement of SN74LVT16543DL?

All SN74LVT16543DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVT16543DL, 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 SN74LVT16543DL part is unused and in its original packaging.

Return procedure for SN74LVT16543DL:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-03 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-01 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…

2026-08-18 Operational Amplifier (Op Amp): Basics, Configurations, Feedback and Applications

Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…

2026-08-14 Jumper Cables: How to Use, Connect and Choose Them Safely

Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…