Nexperia USA Inc. 74LVT16543ADGG,118

Overview

74LVT16543ADGG,118 from Nexperia is a 3.3 V 16-bit registered transceiver with 3-state outputs, designed for bidirectional data flow between two 8-bit or one 16-bit bus domains. It features dual independent A↔B channels, bus-hold inputs eliminating external pull-ups, and operates across 2.7 V–3.6 V supply with 5 V-tolerant I/O. Used in high-speed backplane interfaces and FPGA-to-ASIC interconnects requiring latch-controlled data staging.

For engineers reviewing the 74LVT16543ADGG,118 datasheet, 74LVT16543ADGG,118 pinout, 74LVT16543ADGG,118 application, or 74LVT16543ADGG,118 equivalent, this page delivers verified functional architecture, TSSOP56 package mapping, timing-critical enable/latch/output control behavior, and real-world interface compatibility with 5 V TTL and LVT systems.

Technical Context

The device implements two independent 8-bit registered transceiver blocks (A1↔B1 and A2↔B2), each with separate active-low enable (nEAB/nEBA), latch enable (nLEAB/nLEBA), and output enable (nOEAB/nOEBA) controls. Data latching occurs on LOW-to-HIGH transitions of nLEAB/nLEBA, while transparent mode requires simultaneous LOW on nEAB/nLEAB (A→B) or nEBA/nLEBA (B→A).

Bus-hold circuitry maintains valid logic states on unused inputs without external resistors; IOFF protection enables partial power-down operation; and overvoltage tolerance up to 5.5 V allows safe interfacing with 5 V systems while powered from 3.3 V. Propagation delay is 2.2 ns typical (VCC = 3.3 V) for registered path and 3.7 ns for transparent path.

Key Specifications

Pinout & Package

TSSOP56 plastic thin shrink small outline package (SOT364-1), 56-pin, body width 6.1 mm, 0.5 mm pitch, 1.2 mm max height - optimized for high-density PCB layouts with thermal and signal integrity advantages over SOIC or SSOP.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit registered transceiver applications.

Compared with SN74LVC16543DGGR and 74ALVCH16543QG, the 74LVT16543ADGG,118 uniquely combines 5 V-tolerant I/O, bus-hold, and +64 mA drive-making it optimal for industrial backplanes and mixed-voltage FPGA interfaces where robustness and signal integrity outweigh minimal power savings.

Availability

74LVT16543ADGG,118 is available at Aetrix Electronics and suitable for industrial backplane interfaces, FPGA-to-ASIC bridging, telecom line card buffering, and ATE pattern generation requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for 74LVT16543ADGG,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 semiconductor expert delivering high-performance logic, analog, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for industrial, automotive, and consumer markets.

The 74LVT16543A belongs to Nexperia's LVT (Low-Voltage BiCMOS Technology) logic family, engineered for high-speed 3.3 V systems requiring 5 V interoperability, strong drive capability, and robust ESD performance in demanding industrial applications.

FAQ

What is the maximum clock frequency supported by the 74LVT16543ADGG,118?

The device does not include an internal clock but supports data rates up to 250 MHz based on its 2.2 ns typical propagation delay (latched path) and 1.0 ns minimum pulse width. System-level timing depends on external clocking of latch/enable signals and PCB trace length; actual maximum frequency is determined by setup/hold margins in the target application.

Can the 74LVT16543ADGG,118 be used in hot-swap applications?

Yes - it supports live insertion/extraction via power-up 3-state, IOFF circuitry, and controlled enable sequencing. When VCC ramps, outputs remain in high-impedance until nOE is asserted; IOFF prevents current flow when VCC = 0 V, protecting backplane traces during card replacement.

How does bus-hold functionality eliminate external pull-up resistors?

Internal weak-feedback transistors maintain the last-valid logic state on unused inputs. At VI = 0.8 V, IBHL = +130 μA holds LOW; at VI = 2.0 V, IBHH = −140 μA holds HIGH - providing sufficient current to overcome noise and leakage without external components.

Is the 74LVT16543ADGG,118 pin-compatible with older 74LVT16543 variants?

Yes - the 74LVT16543ADGG,118 shares identical pinout, electrical characteristics, and functional behavior with prior revisions (Rev. 4 and Rev. 3) in the same SOT364-1 package. No layout or firmware changes are required for drop-in replacement in existing designs.