Nexperia USA Inc. 74LVT16543ADGGY

Overview

74LVT16543ADGGY from Nexperia is a 3.3 V, 16-bit registered transceiver with 3-state outputs, designed for bidirectional data bus interfacing between two synchronous logic domains. It supports dual 8-bit or single 16-bit operation, features bus-hold inputs eliminating external pull-ups, and delivers ±64 mA output drive at 3.3 V supply. It operates across -40 °C to +85 °C and interfaces directly with 5 V TTL systems.

For engineers reviewing the 74LVT16543ADGGY datasheet, 74LVT16543ADGGY pinout, 74LVT16543ADGGY application, or 74LVT16543ADGGY equivalent, key selection criteria include latch-enable timing (min 0.8 ns setup at 3.3 V), 3-state propagation delays (tPZH ≤ 4.6 ns), overvoltage-tolerant inputs (to 5.5 V), and TSSOP56 package compatibility with high-density PCB layouts.

Technical Context

The device implements dual independent 8-bit registered transceiver channels (A↔B), each with separate A-to-B and B-to-A control paths comprising enable (nEAB/nEBA), latch enable (nLEAB/nLEBA), and output enable (nOEAB/nOEBA) inputs. All control inputs are active LOW and support transparent, latched, and high-impedance modes.

Its BiCMOS process enables 3.3 V core operation while tolerating 5 V inputs and driving 5 V buses without level shifters. Bus-hold circuitry maintains valid logic states on unused I/Os, and IOFF functionality ensures low leakage (<±100 μA) during partial power-down, supporting hot-plug applications.

Key Specifications

Pinout & Package

TSSOP56 (SOT364-1) package: plastic thin shrink small outline, 56 leads, 6.1 mm body width, 0.5 mm lead pitch, 1.2 mm max height - optimized for automated assembly and thermal performance in space-constrained designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC16543DGGR and 74ALVCH16543T, the 74LVT16543ADGGY uniquely balances 5 V tolerance, strong drive, and bus-hold integration-making it optimal for industrial backplanes where reliability, legacy compatibility, and BOM simplification are prioritized over ultra-low power or auto-direction features.

Availability

74LVT16543ADGGY is available at Aetrix Electronics and suitable for industrial PLC backplanes, high-density memory expansion modules, automated test equipment (ATE) pin electronics, and legacy system upgrade adapters requiring stable component supply and long-term lifecycle assurance.

Supply support for 74LVT16543ADGGY 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, reliable components for automotive, industrial, mobile, and consumer applications, with leadership in logic, discrete, and MOSFET technologies.

The 74LVT16543A belongs to Nexperia's LVT logic family-designed specifically for high-speed, 3.3 V bus interface applications requiring 5 V tolerance, robust drive, and industrial temperature operation.

FAQ

Does the 74LVT16543ADGGY support hot-plug operation?

Yes. Its IOFF circuitry limits power-off leakage to ±100 μA when VCC = 0 V, and bus-hold inputs maintain defined logic states on floating I/Os. Combined with power-up 3-state behavior, this enables safe live insertion and extraction in modular backplane systems without bus contention or latch-up risk.

Can the 74LVT16543ADGGY drive a 5 V bus directly?

Yes. Its outputs are rated for 5 V-tolerant operation in the HIGH state (VO ≤ 7.0 V), and its inputs accept up to 5.5 V regardless of VCC. When driving a 5 V bus, the device operates in open-drain-like mode with pull-up resistors on the bus side-no level shifter is needed for signal integrity or voltage compliance.

What is the minimum pulse width required on nLEAB/nLEBA for reliable latching?

The minimum LOW pulse width on nLEAB or nLEBA is 1.8 ns at VCC = 3.3 V (typical), per Table 7. This ensures sufficient time for internal register capture and avoids metastability. At 2.7 V, the requirement increases to 1.8 ns minimum-designs must verify timing closure against worst-case VCC and temperature corners.

How does bus-hold functionality affect power consumption?

Bus-hold draws ±75 μA to ±140 μA per enabled input at VCC = 3.0 V, increasing total ICC by up to 0.2 mA per active bus-hold pin (per Table 9). This is offset by elimination of external 4.7 kΩ pull resistors, which would draw ~1 mA each at 5 V-net reduction in static power and improved noise immunity.