NXP Semiconductors 74ALVT16543DGG,118

Overview

74ALVT16543DGG,118 from Nexperia is a 2.5 V/3.3 V 16-bit registered transceiver with 3-State outputs, dual 8-bit latch control, bus-hold inputs, and 5 V I/O tolerance. It operates as two independent 8-bit transceivers or one unified 16-bit interface, delivering ±64 mA drive strength and sub-3 ns propagation delay at 3.3 V for high-speed bidirectional data routing in memory expansion and bus isolation applications.

For engineers reviewing the 74ALVT16543DGG,118 datasheet, 74ALVT16543DGG,118 pinout, 74ALVT16543DGG,118 application, or 74ALVT16543DGG,118 equivalent, this device supports live insertion/extraction, power-up 3-State reset, and TTL-compatible switching levels while interfacing across mixed-voltage systems (2.5 V/3.3 V core with 5 V buses).

Technical Context

The 74ALVT16543DGG,118 implements two independent 8-bit D-type latch banks-each with separate A-to-B and B-to-A enable, latch-enable, and output-enable controls-enabling flexible bidirectional data flow directionality and timing control. Its BiCMOS architecture delivers low ICCZ (70 µA at 3.3 V) and robust ESD protection (2000 V HBM), supporting stable operation across –40 °C to +85 °C.

Bus-hold circuitry actively maintains valid logic states on unused inputs without external pull-ups, and the device features power-up 3-State behavior that prevents bus contention during power ramp-up. All I/O pins tolerate 5 V signals regardless of VCC (2.5 V or 3.3 V), enabling seamless interfacing with legacy 5 V logic subsystems.

Key Specifications

Pinout & Package

74ALVT16543DGG,118 is housed in a 56-pin plastic Thin Shrink Small Outline Package (TSSOP), Type II, with 6.1 mm body width and standard JEDEC MO-153 footprint (SOT364-1). The package supports fine-pitch surface-mount assembly and thermal performance suitable for industrial ambient conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALVTH16543DGGR and 74LVT16543DGG,118, the 74ALVT16543DGG,118 uniquely supports dual-voltage operation (2.5 V and 3.3 V), higher output drive (+64 mA), and lower quiescent current - making it optimal for mixed-domain systems requiring maximum timing margin and power efficiency.

Availability

74ALVT16543DGG,118 is available at Aetrix Electronics and suitable for memory expansion interfaces, processor bus isolation, FPGA I/O translation, and legacy peripheral bridging requiring stable component supply across industrial, computing, and embedded design cycles.

Supply support for 74ALVT16543DGG,118 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 leader in discrete, logic, and PowerMOS semiconductors, formed in 2017 from the former NXP Standard Products division, with deep expertise in automotive, industrial, and computing applications.

The 74ALVT16543DGG,118 belongs to Nexperia's ALVT logic family, engineered for high-speed, low-power registered bus interfacing in mixed-voltage systems where reliability, 5 V tolerance, and precise timing control are essential.

FAQ

What supply voltages does the 74ALVT16543DGG,118 support?

The 74ALVT16543DGG,118 supports two distinct VCC operating ranges: 2.3–2.7 V for 2.5 V systems and 3.0–3.6 V for 3.3 V systems. It maintains full functionality-including 5 V I/O tolerance, bus-hold, and latch operation-across both ranges. This dual-voltage capability allows the 74ALVT16543DGG,118 to serve as a single component in designs migrating between voltage domains or integrating heterogeneous subsystems.

Does the 74ALVT16543DGG,118 require external pull-up resistors on unused inputs?

No, the 74ALVT16543DGG,118 integrates active bus-hold circuitry on all data inputs (1A0–1A7, 2A0–2A7, 1B0–1B7, 2B0–2B7), eliminating the need for external pull-up resistors. The bus-hold current (±75–140 µA at 3 V) actively maintains valid logic levels on floating inputs, reducing BOM cost, PCB space, and potential noise susceptibility - a key advantage confirmed in the device's functional description and DC characteristics tables.

What is the maximum data rate supported by the 74ALVT16543DGG,118?

The 74ALVT16543DGG,118 achieves typical propagation delays of 1.6–1.8 ns (3.3 V, CL = 50 pF), supporting reliable data rates exceeding 500 MHz in point-to-point configurations. Its AC characteristics - including setup/hold times down to 0.5 ns and output enable/disable times under 4 ns - ensure timing closure in high-speed bus applications such as memory expansion and FPGA interconnect, as verified in the official Nexperia datasheet revision from 2004.

Is the 74ALVT16543DGG,118 compatible with hot-swap or live-insertion systems?

Yes, the 74ALVT16543DGG,118 explicitly supports live insertion/extraction per its documented features. Its power-up 3-State behavior ensures outputs remain high-impedance during power ramp-up, and its robust ESD protection (2000 V HBM) and latch-controlled data flow prevent bus contention or corruption during hot-plug events - making it suitable for modular backplane and field-replaceable unit designs.

How many independent transceiver channels does the 74ALVT16543DGG,118 provide?

The 74ALVT16543DGG,118 provides two independent 8-bit transceiver channels - labeled Bank 1 (1A/1B) and Bank 2 (2A/2B) - each with dedicated A-to-B and B-to-A enable, latch-enable, and output-enable controls. This architecture allows concurrent bidirectional data transfers or asymmetric configurations (e.g., 8-bit A→B + 8-bit B→A), as defined in the function table and pin description sections of the datasheet.