Nexperia USA Inc. 74ALVCH16501DGGY

Overview

74ALVCH16501DGGY from Nexperia is an 18-bit universal bus transceiver with bidirectional data flow control, bus hold inputs, and 3-state non-inverting outputs. It supports transparent, latched, and clocked operation modes per direction, operates from 1.2 V to 3.6 V, delivers ±24 mA output drive at 3.0 V, and is specified for -40 °C to +85 °C industrial temperature range. It enables robust inter-bus communication in high-density logic systems.

For engineers reviewing the 74ALVCH16501DGGY datasheet, 74ALVCH16501DGGY pinout, 74ALVCH16501DGGY application, or 74ALVCH16501DGGY equivalent, this page provides verified functional behavior, TSSOP56 package mapping, timing-critical setup/hold values, IOFF-enabled partial power-down support, and direct TTL-level interface capability - all confirmed from Nexperia's Rev. 8 (July 2024) product data sheet.

Technical Context

This device implements dual independent 18-bit data paths (A↔B) with separate control logic: OEAB (active HIGH), OEBA (active LOW), LEAB/LEBA (latch enable), and CPAB/CPBA (clock). Each path supports three operational modes - transparent (LE = HIGH), latch-on-level (LE = LOW + static CP), or edge-triggered storage (LE = LOW + CPAB↑/CPBA↑).

The integrated bus hold circuit maintains valid logic states on all 36 data I/Os without external pull-ups, with IBHL = 75–150 μA (LOW) and IBHH = −75 to −175 μA (HIGH) at VCC = 3.0 V. IOFF protection disables outputs during partial power-down, blocking backflow current when VCC = 0 V.

Key Specifications

Pinout & Package

TSSOP56 plastic thin shrink small outline package (SOT364-1), 56-pin, body width 6.1 mm, 0.5 mm pitch, 14.1 × 6.2 mm footprint, 1.2 mm max height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALVCH16501DGGR and 74LVC16501ADGG, the 74ALVCH16501DGGY uniquely guarantees bus hold functionality down to 1.2 V and includes IOFF - making it the sole option for ultra-low-voltage hot-plug systems requiring floating-node immunity and zero-backflow safety.

Availability

74ALVCH16501DGGY is available at Aetrix Electronics and suitable for industrial PLC backplanes, ATE digital I/O modules, embedded memory expansion, and communications baseband processing requiring stable component supply across extended temperature and mixed-voltage environments.

Supply support for 74ALVCH16501DGGY 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 for automotive, industrial, and consumer markets.

The 74ALVCH16501 belongs to Nexperia's Advanced Low-Voltage CMOS (ALVCH) logic family, engineered for low-power, mixed-supply system interfacing with robust noise immunity and hot-swap capability.

FAQ

What is the minimum supply voltage at which bus hold remains functional?

Bus hold is fully characterized and guaranteed from VCC = 1.2 V, with IBHL = 45 μA (min) and IBHH = −45 μA (min) at 2.3 V, and 75–150 μA / −75 to −175 μA at 3.0 V. No degradation is specified below 1.2 V, and operation below that violates Absolute Maximum Ratings.

Can OEAB and OEBA be asserted simultaneously?

Yes - OEAB (active HIGH) and OEBA (active LOW) may both be asserted, placing all 36 I/Os in high-impedance state. This is explicitly supported and used in bus arbitration protocols where neither side drives the line, such as during master handoff or diagnostic isolation.

Does the device support asynchronous latch mode?

Yes - when LEAB = LOW and CPAB is held static (HIGH or LOW), the A-bus data is latched level-sensitively. This mode is documented in Table 3 ("hold data and display") and enables transparent-to-latched transition without clock edges, useful for glitch-free capture of asynchronous signals.

How does IOFF behave when VCC = 0 V but inputs are biased?

Per Section 1 and Figure 3, the IOFF circuit disables outputs regardless of input voltage. When VCC = 0 V, all outputs enter high-Z state even if A/B pins are driven to 3.3 V - preventing reverse current flow through internal clamps and protecting powered-down sections of the system.