Nexperia USA Inc. 74ALVCH16543DGGS

Overview

74ALVCH16543DGGS from Nexperia is a 16-bit D-type registered transceiver with bus hold inputs, 3-state non-inverting outputs, and dual 8-bit operation capability. It supports bidirectional data flow between A- and B-buses using independent enable, latch enable, and output enable controls per direction. Key confirmed parameters include 1.65 V to 3.6 V supply range, ±24 mA output drive at VCC = 3.0 V, -40 °C to +85 °C operating temperature, IOFF partial power-down protection, and TSSOP56 (SOT364-1) package.

For engineers reviewing the 74ALVCH16543DGGS datasheet, 74ALVCH16543DGGS pinout, 74ALVCH16543DGGS application, or 74ALVCH16543DGGS equivalent, this page delivers verified functional architecture, timing-critical propagation delays (e.g., 3.8 ns typ. @ 3.3 V), bus hold current specs (75–150 μA HIGH), static input thresholds (VIH = 2.0 V min @ VCC ≥ 2.7 V), and precise 3-state control behavior under simultaneous enable/latch transitions.

Technical Context

This device implements two independent 8-bit registered transceiver channels-each with separate A→B and B→A control paths-enabling flexible bus isolation or data staging in high-density memory or peripheral interfaces. Its back-to-back D-type latches allow transparent mode (nEAB/nEBA LOW + nLEAB/nLEBA LOW) followed by edge-triggered latching (LOW-to-HIGH nLEAB/nLEBA transition), decoupling input sampling from output update timing.

IOFF circuitry actively disables outputs during power-down, blocking destructive backflow current across powered/unpowered rails. Bus hold inputs eliminate external pull resistors by maintaining last-valid logic state (IBHH = −75 μA typ. @ VCC = 3.0 V, VI = 2.0 V), while 50 Ω transmission-line drive capability ensures signal integrity on controlled-impedance PCB traces up to 85 °C.

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. Features low-inductance multiple VCC/GND pins to minimize ground bounce and noise in high-speed bus applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALVCH16543DGGR, the DGGS offers identical performance in tube packaging for lab use; versus 74LVC16543ADGG, it adds critical IOFF and full bus hold for robustness in mixed-rail industrial designs.

Availability

74ALVCH16543DGGS is available at Aetrix Electronics and suitable for industrial automation controllers, FPGA-based data acquisition systems, and legacy bus protocol adapters requiring stable component supply, long-term lifecycle assurance, and guaranteed traceable sourcing.

Supply support for 74ALVCH16543DGGS 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 focused on essential efficiency technologies, delivering high-performance logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74ALVCH series targets high-speed, low-voltage bus interface applications where power efficiency, noise immunity, and robustness across mixed-supply systems are critical design requirements.

FAQ

What is the minimum supply voltage required for reliable bus hold operation?

Bus hold functionality is fully specified from VCC = 1.65 V, with IBHH = −75 μA typical at VCC = 3.0 V and VI = 2.0 V. At 1.8 V operation, bus hold remains active but with reduced current (IBHH ≈ −45 μA at VCC = 2.3 V, VI = 1.7 V), sufficient to maintain logic state against typical PCB leakage.

Can 74ALVCH16543DGGS operate with only one side powered (e.g., VCC applied only to A-side)?

Yes - IOFF circuitry automatically disables all outputs when VCC = 0 V, preventing back-current flow. However, inputs on the unpowered side must remain within absolute maximum ratings (VI ≤ −0.5 V or ≥ VCC + 0.5 V is prohibited); floating inputs on the unpowered side are unsafe and must be clamped.

How does the latch enable (nLEAB/nLEBA) interact with the enable (nEAB/nEBA) inputs during data capture?

nEAB/nEBA must be LOW to activate the data path; only then does a LOW-to-HIGH nLEAB/nLEBA transition capture and hold the current A/B input values. If nEAB/nEBA is HIGH, nLEAB/nLEBA transitions have no effect - outputs remain in high-impedance state regardless of latch timing.

Is the MULTIBYTE™ pinout compatible with standard 16-bit bus layouts on PCBs?

Yes - the MULTIBYTE™ flow-through architecture places complementary A/B pins (e.g., 1A0/1B0, 1A1/1B1) in adjacent positions across the TSSOP56 package, enabling straight-through routing with matched trace lengths and minimal skew - ideal for high-speed parallel buses up to 200 MHz.