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

NXP Semiconductors 74ALVCH16543DGG512

Name: 74ALVCH16543DGG512
Brand: NXP Semiconductors
SKU: 74ALVCH16543DGG512
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74ALVCH16543DGG512

Manufacturer:: NXP Semiconductors

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: 74ALVCH16543DGG512.pdf

Description:: REGISTERED BUS TRANSCEIVER

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Product details

Overview

74ALVCH16543DGG512 from Nexperia is a 16-bit registered transceiver with dual 8-bit bus direction control, 3-state non-inverting outputs, bus hold inputs, and IOFF partial power-down protection. It operates from 1.65 V to 3.6 V, supports -40 °C to +85 °C ambient range, and delivers ±24 mA output drive at VCC = 3.0 V. It enables bidirectional data flow between two 8-bit buses in industrial control backplanes and memory-mapped I/O interfaces.

For engineers reviewing the 74ALVCH16543DGG512 datasheet, 74ALVCH16543DGG512 pinout, 74ALVCH16543DGG512 application, or 74ALVCH16543DGG512 equivalent, this page provides verified functional architecture, TSSOP56 package mapping, JEDEC-compliant voltage thresholds, propagation delay (≤4.3 ns at 3.3 V), and bus hold current specifications critical for high-density PCB layout and signal integrity validation.

Technical Context

The 74ALVCH16543DGG512 implements dual independent 8-bit transceiver channels-each with separate A→B and B→A enable (nEAB/nEBA), latch enable (nLEAB/nLEBA), and output enable (nOEAB/nOEBA) controls-allowing simultaneous or asymmetric bus operation. Its back-to-back D-type latches support transparent mode (when nE and nLE are LOW) and edge-triggered latching (on LOW-to-HIGH nLE transition).

IOFF circuitry disables outputs during power-down to prevent damaging backflow current; bus hold inputs eliminate external pull resistors by maintaining last-valid logic state; and MULTIBYTE™ flow-through pinout minimizes trace skew across all 16 bidirectional data lines. The device complies with JESD8-7, JESD8-5, and JESD8C for 1.65–3.6 V operation.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	1.65 V to 3.6 V - Enables direct interface with 1.8 V, 2.5 V, and 3.3 V logic domains without level shifters.
Propagation Delay (tpd)	≤4.3 ns at VCC = 3.0–3.6 V - Supports >200 MHz bus timing margins for high-speed parallel interfaces.
Output Drive Strength	±24 mA at VCC = 3.0 V - Drives 50 Ω transmission lines directly at 85 °C, eliminating external buffers in point-to-point links.
Bus Hold Current	IBHL = 75–150 μA (LOW), IBHH = −75–−175 μA (HIGH) at VCC = 3.0 V - Maintains stable logic states on floating inputs without external biasing.
IOFF Protection	Active during partial power-down - Prevents reverse current flow when VCC = 0 V while other rails remain active, protecting system-level power sequencing.
ESD Robustness	HBM >2000 V, CDM >1000 V - Meets industrial-grade ESD immunity requirements per ANSI/ESDA/JEDEC JS-001 and JS-002.
Operating Temperature	−40 °C to +85 °C - Qualified for extended-temperature industrial environments including factory automation and telecom infrastructure.

Pinout & Package

TSSOP56 (SOT364-1) package: plastic thin shrink small outline, 56 leads, 6.1 mm body width, 0.5 mm pitch, 1.2 mm max height. Features low-inductance multiple VCC/GND pins (4×VCC, 8×GND) to suppress ground bounce and supply noise in high-speed switching.

Pin/Terminal	Circuit Role	Design Meaning
1A0–1A7, 2A0–2A7	A-side data I/O	8-bit port A inputs/outputs for first 8-bit channel; bus hold enabled by default.
1B0–1B7, 2B0–2B7	B-side data I/O	8-bit port B inputs/outputs for second 8-bit channel; symmetric bidirectional capability.
1OEAB, 2OEAB	A→B output enable	Active-LOW control enabling 3-state outputs from A to B ports; pin 1 and pin 28.
1OEBA, 2OEBA	B→A output enable	Active-LOW control enabling 3-state outputs from B to A ports; pin 56 and pin 29.
1EAB, 2EAB	A→B enable	Active-LOW gate for A→B data path transparency/latching; pin 3 and pin 26.
1EBA, 2EBA	B→A enable	Active-LOW gate for B→A data path transparency/latching; pin 54 and pin 31.
1LEAB, 2LEAB	A→B latch enable	Active-LOW edge-triggered latch control; samples A-port data on LOW-to-HIGH transition; pin 2 and pin 27.
1LEBA, 2LEBA	B→A latch enable	Active-LOW edge-triggered latch control; samples B-port data on LOW-to-HIGH transition; pin 55 and pin 30.
VCC (pins 7, 22, 35, 50)	Power supply	Four distributed supply pins reduce IR drop and improve decoupling effectiveness across wide bus.
GND (pins 4, 11, 18, 25, 32, 39, 46, 53)	Ground reference	Eight ground pins minimize ground loop inductance and stabilize switching noise for 16-bit parallel operation.

Key Features

Feature	Design Value
Dual 8-bit registered transceiver architecture	Independent A↔B control per 8-bit segment enables flexible memory-mapped I/O partitioning and isolated bus arbitration.
MULTIBYTE™ flow-through pinout	Linear A/B pin pairing (e.g., 1A0/1B0 adjacent) minimizes trace length mismatch and inter-pair skew in high-speed parallel routing.
IOFF partial power-down protection	Automatically disables outputs when VCC = 0 V, preventing backfeed current into powered-down subsystems during hot-swap or staged power sequencing.
Integrated bus hold circuitry	Eliminates need for 10 kΩ external pull-up/down resistors on all 32 data pins, reducing BOM count and board space in dense backplane designs.
JEDEC-compliant voltage standards	Fully compliant with JESD8-7 (1.65–1.95 V), JESD8-5 (2.3–2.7 V), and JESD8C (2.7–3.6 V) - ensures interoperability across mixed-voltage systems.

Applications

Industrial Backplane Interface	Memory-Mapped I/O Expansion
Use Scenario: Bidirectional data transfer between microcontroller local bus and modular I/O carrier board in PLC rack systems. IC Role / Device Role / Timing Role: Registered transceiver providing synchronized, glitch-free handshaking between asynchronous domains using nLEAB/nLEBA latching. Use Value: Bus hold maintains valid state during module insertion/removal; IOFF prevents backfeed during hot-swap; 4.3 ns tpd ensures timing closure at 25 MHz bus clock.	Use Scenario: Expanding GPIO count of an ARM-based HMI controller via parallel peripheral interface to FPGA-configured I/O bank. IC Role / Device Role / Timing Role: Level-shifting registered buffer isolating 3.3 V MCU bus from 2.5 V FPGA I/O bank with independent direction control per byte lane. Use Value: Dual 8-bit channels allow separate address/data gating; ±24 mA drive supports 50 Ω line termination; JESD8-5 compliance guarantees reliable 2.5 V operation.
Telecom Line Card Data Path	Test Equipment Digital Pattern Generator
Use Scenario: Interfacing baseband processor to multi-channel ADC/DAC array in wireless base station radio unit. IC Role / Device Role / Timing Role: Registered transceiver buffering time-critical I/Q sample data with deterministic latency via nLE-controlled latching. Use Value: Propagation delay variation ≤0.5 ns across temperature ensures phase coherence; 8 GND pins suppress ground bounce-induced jitter in 16-bit parallel sampling.	Use Scenario: Driving 16-bit parallel stimulus patterns from pattern generator ASIC to DUT under test in automated test equipment. IC Role / Device Role / Timing Role: Output register holding test vectors while input register captures response data, enabling synchronous capture/compare cycles. Use Value: Transparent mode allows real-time pass-through; latch mode freezes vector for precise timing alignment; 24 mA drive ensures clean edges into 50 Ω scope inputs.

Industrial Backplane Interface

Memory-Mapped I/O Expansion

Use Scenario: Bidirectional data transfer between microcontroller local bus and modular I/O carrier board in PLC rack systems.

IC Role / Device Role / Timing Role: Registered transceiver providing synchronized, glitch-free handshaking between asynchronous domains using nLEAB/nLEBA latching.

Use Value: Bus hold maintains valid state during module insertion/removal; IOFF prevents backfeed during hot-swap; 4.3 ns tpd ensures timing closure at 25 MHz bus clock.

Use Scenario: Expanding GPIO count of an ARM-based HMI controller via parallel peripheral interface to FPGA-configured I/O bank.

IC Role / Device Role / Timing Role: Level-shifting registered buffer isolating 3.3 V MCU bus from 2.5 V FPGA I/O bank with independent direction control per byte lane.

Use Value: Dual 8-bit channels allow separate address/data gating; ±24 mA drive supports 50 Ω line termination; JESD8-5 compliance guarantees reliable 2.5 V operation.

Telecom Line Card Data Path

Test Equipment Digital Pattern Generator

Use Scenario: Interfacing baseband processor to multi-channel ADC/DAC array in wireless base station radio unit.

IC Role / Device Role / Timing Role: Registered transceiver buffering time-critical I/Q sample data with deterministic latency via nLE-controlled latching.

Use Value: Propagation delay variation ≤0.5 ns across temperature ensures phase coherence; 8 GND pins suppress ground bounce-induced jitter in 16-bit parallel sampling.

Use Scenario: Driving 16-bit parallel stimulus patterns from pattern generator ASIC to DUT under test in automated test equipment.

IC Role / Device Role / Timing Role: Output register holding test vectors while input register captures response data, enabling synchronous capture/compare cycles.

Use Value: Transparent mode allows real-time pass-through; latch mode freezes vector for precise timing alignment; 24 mA drive ensures clean edges into 50 Ω scope inputs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ALVCH16543DGGR	TSSOP56 package, identical pinout and electrical specs; manufactured by Texas Instruments with same functional behavior and timing.	No difference in bus hold strength, IOFF behavior, or JEDEC compliance; TI version uses different ESD test methodology but meets same HBM/CDM classes.	Select for multi-source procurement where TI qualification is required; identical layout compatibility eliminates redesign risk.
74LVC16543ADGG	Lower drive (±24 mA only at VCC ≥ 3.0 V); no bus hold; lacks IOFF; operates 1.65–3.6 V but static VIH/VIL thresholds differ slightly.	Not suitable for unpowered-bus scenarios or floating-bus environments; requires external pull resistors; higher static power in high-impedance states.	Choose only if cost sensitivity outweighs robustness needs and system guarantees always-powered buses with controlled termination.

Compared with SN74ALVCH16543DGGR, the 74ALVCH16543DGG512 offers identical functionality and layout compatibility but with Nexperia's optimized bus hold current profile and tighter tpd distribution. Against 74LVC16543ADGG, it adds critical IOFF and bus hold-enabling safer hot-swap and reduced BOM-without sacrificing speed or voltage flexibility.

Availability

74ALVCH16543DGG512 is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory-mapped I/O expansion, telecom line card data paths, and test equipment digital pattern generators requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.

Supply support for 74ALVCH16543DGG512 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 leading semiconductor manufacturer specializing in high-performance logic, analog, and discrete components, with global R&D and manufacturing operations focused on reliability and energy efficiency.

The 74ALVCH16543DGG512 belongs to Nexperia's advanced ALVCH logic family, designed specifically for high-speed, low-power, mixed-voltage bidirectional bus interfacing in industrial and communications infrastructure where robustness, timing predictability, and partial power-down safety are mandatory.

FAQ

What is the maximum operating frequency supported by the 74ALVCH16543DGG512?

The 74ALVCH16543DGG512 does not specify a maximum clock frequency but supports bus operation up to 200 MHz based on its propagation delay (≤4.3 ns at VCC = 3.3 V) and setup/hold times (tsu = 0.1 ns, th = 0.2 ns). System-level timing must account for load capacitance, trace impedance, and enable/latch signal skew. The 74ALVCH16543DGG512 is optimized for synchronous parallel interfaces rather than clocked FIFOs or state machines.

Does the 74ALVCH16543DGG512 require external pull-up or pull-down resistors on its data lines?

No, the 74ALVCH16543DGG512 includes integrated bus hold circuitry on all 32 data I/O pins (1A0–1A7, 2A0–2A7, 1B0–1B7, 2B0–2B7), eliminating the need for external pull resistors. Bus hold maintains the last-valid logic state with IBHL = 75–150 μA (LOW) and IBHH = −75–−175 μA (HIGH) at VCC = 3.0 V, ensuring stable inputs during idle or hot-swap conditions. The 74ALVCH16543DGG512 is fully functional without external biasing.

How does IOFF protection function in the 74ALVCH16543DGG512 during partial power-down?

The 74ALVCH16543DGG512's IOFF circuitry automatically disables all outputs when VCC drops below threshold (typically <0.8 V), placing them in high-impedance OFF-state regardless of enable pin states. This prevents damaging backflow current from powered B-side buses into unpowered A-side circuitry during staged power sequencing or hot-swap events. The 74ALVCH16543DGG512 remains safe even when VCC = 0 V while other system rails remain active.

Can the 74ALVCH16543DGG512 be used as two independent 8-bit transceivers?

Yes, the 74ALVCH16543DGG512 is explicitly designed to operate as two independent 8-bit transceivers. Channel 1 (1A0–1A7 ↔ 1B0–1B7) and Channel 2 (2A0–2A7 ↔ 2B0–2B7) each have dedicated control signals: nEAB/nEBA, nLEAB/nLEBA, and nOEAB/nOEBA. Control logic is fully isolated between channels, allowing asymmetric operation-for example, latching data on Channel 1 while passing through Channel 2 transparently. The 74ALVCH16543DGG512 supports this dual-mode use case per its functional description and pinning.

What JEDEC standards does the 74ALVCH16543DGG512 comply with for voltage operation?

The 74ALVCH16543DGG512 complies with three JEDEC standards covering its full 1.65 V to 3.6 V supply range: JESD8-7 (1.65 V to 1.95 V), JESD8-5 (2.3 V to 2.7 V), and JESD8C (2.7 V to 3.6 V). These standards define input/output voltage thresholds, timing parameters, and DC characteristics for each voltage band. Compliance ensures interoperability with other JEDEC-compliant devices across mixed-voltage systems without level translation. The 74ALVCH16543DGG512 meets all specified limits in Tables 5–9 of its Nexperia datasheet Rev. 4.

74ALVCH16543DGG512 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: 74ALVCH

Package/Case:: 56-TFSOP (0.240", 6.10mm 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:: 24mA, 24mA

Voltage - Supply:: 1.2V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 56-TSSOP

74ALVCH16543DGG512 FAQ

1.How can I place an order for 74ALVCH16543DGG512 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74ALVCH16543DGG512 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 74ALVCH16543DGG512 reliable?

The price and inventory of 74ALVCH16543DGG512 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ALVCH16543DGG512 is usually 5 days.

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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ALVCH16543DGG512 transactions.

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74ALVCH16543DGG512 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74ALVCH16543DGG512 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 74ALVCH16543DGG512?

For technical support, including 74ALVCH16543DGG512 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ALVCH16543DGG512 requirements.

6.How does Aetrix verify that 74ALVCH16543DGG512 is sourced from the original manufacturer or authorized distributors?

All 74ALVCH16543DGG512 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 74ALVCH16543DGG512 meets industry standards.

7.What is the process for return or replacement of 74ALVCH16543DGG512?

All 74ALVCH16543DGG512 units undergo pre-shipment inspection (PSI). If there is an issue with 74ALVCH16543DGG512, 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 74ALVCH16543DGG512 part is unused and in its original packaging.

Return procedure for 74ALVCH16543DGG512:

1.Submit a request within 90 days.

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

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