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Texas Instruments SN74LVT16543DGGR

Name: SN74LVT16543DGGR
Brand: Texas Instruments
SKU: SN74LVT16543DGGR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74LVT16543DGGR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74LVT16543DGGR.pdf

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

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Product details

Overview

SN74LVT16543DGGR 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 compatibility, supporting dual 8-bit or single 16-bit bidirectional data flow, latch-enable and output-enable per register, and bus-hold inputs - used in backplane interface and voltage-level translation between 3.3-V logic and legacy 5-V systems.

For engineers reviewing the SN74LVT16543DGGR datasheet, SN74LVT16543DGGR pinout, SN74LVT16543DGGR application, or SN74LVT16543DGGR equivalent, this page delivers verified electrical specs, TSSOP-56 package details, timing parameters at 3.3 V, bus-hold functionality, and real-world alternatives for industrial bus bridging and hot-swap-capable board interfaces.

Technical Context

This device implements two independent 8-bit registered transceiver sections (A↔B), each with dedicated CE, LE, and OE controls enabling asynchronous latching and 3-state output management. Its Advanced BiCMOS Technology (ABT) architecture delivers low static power (<0.12 mA ICC in disabled state) and high noise immunity via distributed V_CC/GND pins and flow-through pinout.

It supports live insertion and unregulated battery operation down to 2.7 V, while maintaining TTL-compatible input thresholds (V_IL = 0.8 V, V_IH = 2 V) and 5.5-V tolerant I/Os - critical for mixed-voltage system interconnects where signal integrity and power sequencing robustness are required.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.7 V to 3.6 V - enables operation from partially discharged batteries and accommodates supply ripple without functional loss.
Input Voltage Tolerance	−0.5 V to 5.5 V - allows direct connection to 5-V buses without level-shifting circuitry.
Output Drive (I_OL)	64 mA at V_CC = 3 V - sufficient to drive multiple TTL loads or terminated transmission lines.
Propagation Delay (t_PLH)	2.7 ns typical (A→B, V_CC = 3.3 V) - supports >200-MHz data rates in short-trace applications.
Bus-Hold Current	±75 µA at V_CC = 3 V - eliminates external pull-ups on unused data lines, reducing BOM count and layout complexity.
Operating Temperature	−40°C to +85°C - qualified for industrial-grade embedded control and communications equipment.
Package	TSSOP-56 (DGG), 13.9 × 6.1 mm, 1.2-mm max height - surface-mount compatible with automated assembly and space-constrained PCBs.

Pinout & Package

TSSOP-56 (DGG) package: 56-pin thin shrink small-outline package with 0.5-mm pitch, 13.9 mm × 6.1 mm body, 1.2-mm maximum height, and Q1 pin-1 quadrant orientation per JEDEC MO-153.

Pin/Terminal	Circuit Role	Design Meaning
1OEAB, 2OEAB, 1OEBA, 2OEBA	Output Enable (active-low)	Individually disables B-side or A-side outputs to high-impedance state; critical for bus arbitration and multi-drop sharing.
1LEAB, 2LEAB, 1LEBA, 2LEBA	Latch Enable (active-low)	Controls transparent vs. storage mode of internal registers; enables synchronous capture of A or B data on rising edge.
1CEAB, 2CEAB, 1CEBA, 2CEBA	Chip Enable (active-low)	Gates data flow direction; must be low to allow A→B or B→A transfer - provides hierarchical enable for subsystem partitioning.
A1–A8, B1–B8 (×2 sections)	Data I/O ports	16 bidirectional data terminals grouped into two 8-bit channels; each port supports 5-V-tolerant inputs and 3.3-V CMOS outputs.
V_CC, GND (×8 total)	Power distribution	Distributed V_CC/GND pairs minimize simultaneous switching noise and improve signal integrity in high-speed parallel buses.

Key Features

Feature	Design Value
Mixed-mode I/O	5-V input tolerance and 5-V output drive capability while operating from 3.3-V V_CC - eliminates need for external level shifters in hybrid voltage systems.
Bus-Hold Inputs	Active retention of last valid logic state on floating A/B data lines - prevents undefined states during hot-plug or partial power-down sequences.
Live Insertion Support	Controlled power-up/down behavior with OE tied to V_CC via pull-up ensures high-Z outputs during supply ramp - avoids bus contention in modular backplanes.
Flow-Through Pinout	Input and output pins arranged to minimize trace crossing and layer transitions - reduces PCB routing complexity and improves signal integrity in dense layouts.
Low Ground Bounce	V_OLP < 0.8 V at V_CC = 3.3 V - limits noise coupling into adjacent signals during high-current switching events.

Applications

Industrial Backplane Interface	Legacy System Bus Bridge
Use Scenario: Interfacing a modern 3.3-V FPGA-based controller to an aging 5-V VMEbus or ISA-compatible peripheral card. IC Role / Device Role / Timing Role: Bidirectional registered transceiver providing voltage translation, data latching, and bus isolation between mismatched logic families. Use Value: Eliminates discrete level shifters and glue logic while preserving setup/hold timing margins through controlled register staging.	Use Scenario: Upgrading a PLC I/O module's microcontroller to 3.3-V operation while retaining compatibility with existing 5-V sensor/actuator bus wiring. IC Role / Device Role / Timing Role: Registered buffer managing data handshaking between 3.3-V CPU and 5-V peripheral address/data bus with independent direction control. Use Value: Enables drop-in replacement of legacy 5-V transceivers without redesigning PCB traces or firmware timing loops.
Hot-Swappable Module Interface	High-Density Memory Expansion Bus
Use Scenario: Supporting hot-plug capability in a modular telecom line card where daughterboards may be inserted or removed under power. IC Role / Device Role / Timing Role: Isolating data paths between host backplane and pluggable module using controlled OE/CE sequencing during insertion. Use Value: Prevents bus contention and ground bounce spikes via synchronized 3-state activation - validated per JEDEC JESD-17 latch-up spec (>500 mA).	Use Scenario: Expanding SRAM or Flash memory capacity on a compact embedded controller board with limited routing layers. IC Role / Device Role / Timing Role: Registered transceiver buffering 16-bit data/address lines between SoC and memory bank, with separate LE/OE per byte lane. Use Value: Reduces signal skew across wide buses via matched propagation delays (t_PLH/t_PHL ≤ 5.5 ns) and distributed power pins.

Industrial Backplane Interface

Legacy System Bus Bridge

Use Scenario: Interfacing a modern 3.3-V FPGA-based controller to an aging 5-V VMEbus or ISA-compatible peripheral card.

IC Role / Device Role / Timing Role: Bidirectional registered transceiver providing voltage translation, data latching, and bus isolation between mismatched logic families.

Use Value: Eliminates discrete level shifters and glue logic while preserving setup/hold timing margins through controlled register staging.

Use Scenario: Upgrading a PLC I/O module's microcontroller to 3.3-V operation while retaining compatibility with existing 5-V sensor/actuator bus wiring.

IC Role / Device Role / Timing Role: Registered buffer managing data handshaking between 3.3-V CPU and 5-V peripheral address/data bus with independent direction control.

Use Value: Enables drop-in replacement of legacy 5-V transceivers without redesigning PCB traces or firmware timing loops.

Hot-Swappable Module Interface

High-Density Memory Expansion Bus

Use Scenario: Supporting hot-plug capability in a modular telecom line card where daughterboards may be inserted or removed under power.

IC Role / Device Role / Timing Role: Isolating data paths between host backplane and pluggable module using controlled OE/CE sequencing during insertion.

Use Value: Prevents bus contention and ground bounce spikes via synchronized 3-state activation - validated per JEDEC JESD-17 latch-up spec (>500 mA).

Use Scenario: Expanding SRAM or Flash memory capacity on a compact embedded controller board with limited routing layers.

IC Role / Device Role / Timing Role: Registered transceiver buffering 16-bit data/address lines between SoC and memory bank, with separate LE/OE per byte lane.

Use Value: Reduces signal skew across wide buses via matched propagation delays (t_PLH/t_PHL ≤ 5.5 ns) and distributed power pins.

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 (V_IH = 2 V), no 5-V tolerance - requires external level shifters for 5-V buses.	Suitable only for pure 3.3-V systems; not interoperable with 5-V peripherals without added components.	Select when interfacing exclusively with 3.3-V logic and lowest power consumption is prioritized over mixed-voltage flexibility.
SN74ALVCH162245DLR	Non-latched, non-registered 16-bit bus transceiver; supports 1.65–3.6-V V_CC; no CE/LE controls - simpler control but no data staging capability.	Used in high-speed point-to-point links where latching is unnecessary; lacks bus-hold and live-insertion support.	Choose for cost-sensitive, high-throughput data pipes without timing-critical register staging or floating-input handling requirements.

Compared with SN74LVTH16543DGGR and SN74ALVCH162245DLR, the SN74LVT16543DGGR uniquely combines 5-V I/O tolerance, independent latch-enable per 8-bit section, and bus-hold - making it the only option among the three that supports seamless integration into mixed-voltage, hot-pluggable, and floating-bus environments without supplemental circuitry.

Availability

SN74LVT16543DGGR is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy bus bridges, hot-swappable module designs, and high-density memory expansion requiring stable component supply and long-term manufacturability.

Supply support for SN74LVT16543DGGR 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 over 50 years of innovation in high-reliability interface and signal-path ICs.

The SN74LVT16543DGGR belongs to TI's Widebus™ family of advanced BiCMOS transceivers, engineered specifically for robust voltage-level translation and noise-immune data routing in industrial and telecom infrastructure equipment.

FAQ

What is the maximum operating temperature range for the SN74LVT16543DGGR?

The SN74LVT16543DGGR is characterized for operation from −40°C to +85°C, meeting industrial-grade thermal requirements. This range is explicitly confirmed in the SCBS148C datasheet under "recommended operating conditions" and applies to the DGG package variant. The SN74LVT16543DGGR does not support extended military temperature ranges - those are reserved for the SN54LVT16543 variant in the WD ceramic package.

Does the SN74LVT16543DGGR support 5-V inputs while powered from 3.3 V?

Yes, the SN74LVT16543DGGR supports input voltages up to 5.5 V regardless of V_CC level, as specified in the "absolute maximum ratings" and "recommended operating conditions" tables. This 5-V tolerance is intrinsic to its ABT process and enables direct connection to legacy 5-V buses without external level-shifting components - a core design feature confirmed for the SN74LVT16543DGGR in all official TI documentation.

How many independent control sets does the SN74LVT16543DGGR provide?

The SN74LVT16543DGGR provides four independent control sets: two A-to-B (1CEAB/1LEAB/1OEAB and 2CEAB/2LEAB/2OEAB) and two B-to-A (1CEBA/1LEBA/1OEBA and 2CEBA/2LEBA/2OEBA), each governing one 8-bit channel. This allows fully asynchronous bidirectional data flow management - a defining architectural feature documented in the logic diagram and function table of the SN74LVT16543DGGR datasheet.

Is bus-hold functionality enabled by default on the SN74LVT16543DGGR?

Yes, active bus-hold circuitry is integrated and always enabled on all A and B data inputs of the SN74LVT16543DGGR - no configuration or external components are required. It maintains the last-valid logic state with ±75 µA hold current (at V_CC = 3 V), eliminating the need for external pull-up/pull-down resistors on unused or unterminated lines, as stated in the device description and electrical characteristics table.

What package type and dimensions does the SN74LVT16543DGGR use?

The SN74LVT16543DGGR uses the TSSOP-56 (DGG) package: 13.9 mm × 6.1 mm body size, 1.2-mm maximum height, 0.5-mm lead pitch, and Q1 pin-1 orientation. These mechanical specifications are defined in TI's DGG0056A package outline drawing and confirmed in the Package Option Addendum, distinguishing it from the SSOP (DL) variant also offered in the SN74LVT16543 family.

SN74LVT16543DGGR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74LVT

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

Packaging:: Tape & Reel (TR)

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-TSSOP

SN74LVT16543DGGR FAQ

1.How can I place an order for SN74LVT16543DGGR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74LVT16543DGGR 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 SN74LVT16543DGGR reliable?

The price and inventory of SN74LVT16543DGGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVT16543DGGR is usually 5 days.

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SN74LVT16543DGGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74LVT16543DGGR 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 SN74LVT16543DGGR?

For technical support, including SN74LVT16543DGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVT16543DGGR requirements.

6.How does Aetrix verify that SN74LVT16543DGGR is sourced from the original manufacturer or authorized distributors?

All SN74LVT16543DGGR 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 SN74LVT16543DGGR meets industry standards.

7.What is the process for return or replacement of SN74LVT16543DGGR?

All SN74LVT16543DGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVT16543DGGR, 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 SN74LVT16543DGGR part is unused and in its original packaging.

Return procedure for SN74LVT16543DGGR:

1.Submit a request within 90 days.

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

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