Nexperia USA Inc. 74ALVCH16600DGGY

Overview

74ALVCH16600DGGY from Nexperia is an 18-bit universal bus transceiver with bidirectional data flow control, bus hold inputs, and 3-state outputs. It supports A↔B data transfer via independent clock (CPAB/CPBA), latch enable (LEAB/LEBA), clock enable (CEAB/CEBA), and output enable (OEAB/OEBA) signals. Operates from 1.65 V to 3.6 V supply, delivers ±24 mA drive at 3.0 V, and is specified for −40 °C to +85 °C - used in high-density memory expansion and FPGA I/O bridging applications.

For engineers reviewing the 74ALVCH16600DGGY datasheet, 74ALVCH16600DGGY pinout, 74ALVCH16600DGGY application, or 74ALVCH16600DGGY equivalent, key selection criteria include dual-directional latch/clock timing control, IOFF partial power-down protection, bus hold functionality for floating-bus immunity, and TSSOP56 pin compatibility with 18-bit parallel bus architectures.

Technical Context

This device implements a dual-lane, 18-bit universal transceiver architecture with independent A-to-B and B-to-A control paths. Each direction features synchronous latching (on CPAB/CPBA edge when CEAB/CEBA and LEAB/LEBA are active), transparent mode (when LEAB/LEBA = HIGH), and 3-state output control (via OEAB/OEBA).

It integrates bus hold circuitry on all 36 data terminals (A0–A17, B0–B17) to maintain valid logic states during high-impedance periods, and uses IOFF to disable outputs during partial power-down - preventing backflow current when VCC = 0 V while other rails remain active.

Key Specifications

Pinout & Package

TSSOP56 package (SOT364-1): plastic thin shrink small outline, 56 leads, 6.1 mm body width, 0.5 mm pitch, 1.2 mm max height - optimized for high-pin-count density and low-inductance grounding via eight GND pins and four VCC pins.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 18-bit universal transceiver applications.

Compared with SN74ALVTH16600DGGR and 74LVC16600ADGG, the 74ALVCH16600DGGY uniquely combines bus hold, IOFF, and dual-edge latch control in a single 18-bit transceiver - critical for robust, low-BOM industrial and test-system designs requiring signal integrity and power sequencing resilience.

Availability

74ALVCH16600DGGY is available at Aetrix Electronics and suitable for memory expansion interfaces, FPGA I/O bridging, industrial backplane buses, and automated test equipment requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for 74ALVCH16600DGGY 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 high-volume, high-reliability logic, analog, and MOSFET solutions - delivering energy-efficient, industry-standard components with rigorous automotive and industrial qualification.

The 74ALVCH16600 belongs to Nexperia's advanced low-voltage CMOS logic family, designed specifically for high-speed, low-power, mixed-supply parallel bus interfacing in industrial automation, communications infrastructure, and test instrumentation.

FAQ

What is the purpose of the IOFF feature in the 74ALVCH16600DGGY?

The IOFF feature disables all outputs when VCC = 0 V, blocking reverse current flow from live A/B buses into the unpowered device. This prevents damage during hot-swap events or multi-rail power sequencing - a requirement in modular industrial systems where subsystems power up/down independently.

Can the 74ALVCH16600DGGY operate with only one supply rail active?

Yes - the device supports partial power-down via IOFF. When VCC is at 0 V but A/B buses are driven by external powered devices, IOFF forces outputs into high-impedance and clamps internal nodes to prevent back-current. This behavior is verified per JESD78 Class II Level B latch-up testing and absolute maximum ratings.

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

Each A0–A17 and B0–B17 input includes an integrated weak keeper circuit that sources or sinks ±75–175 μA to maintain the last-valid logic state when the input floats. This holds lines HIGH or LOW without external components - reducing BOM cost, PCB area, and potential noise coupling from resistor networks.

What timing modes does the 74ALVCH16600DGGY support for A-to-B data transfer?

Three distinct A-to-B modes are supported: (1) Transparent mode (LEAB = HIGH), (2) Hold mode (LEAB = LOW, CPAB static), and (3) Clock-triggered latch mode (LEAB = LOW, CEAB = LOW, CPAB falling edge). All modes are independently configurable for B-to-A flow using LEBA, CEBA, and CPBA - enabling flexible synchronization in asymmetric bus architectures.