Nexperia USA Inc. 74ALVCH162601DGGS

Overview

74ALVCH162601DGGS from Nexperia is an 18-bit universal bus transceiver with integrated 30 Ω termination resistors, bus hold inputs, and 3-state outputs. It supports bidirectional A↔B data flow controlled by independent clock (CPAB/CPBA), latch enable (LEAB/LEBA), clock enable (CEAB/CEBA), and output enable (OEAB/OEBA) signals. Designed for high-speed parallel bus interfaces in industrial control backplanes and memory expansion modules operating from −40 °C to +85 °C.

For engineers reviewing the 74ALVCH162601DGGS datasheet, 74ALVCH162601DGGS pinout, 74ALVCH162601DGGS application, or 74ALVCH162601DGGS equivalent, this page delivers verified functional architecture, TSSOP56 package mapping, timing-critical propagation delays (e.g., 3.1 ns typ at 3.3 V), IOFF partial power-down support, and real-world use cases in hot-swappable I/O subsystems.

Technical Context

This device implements dual independent 18-bit bidirectional data paths with separate control logic per direction: A-to-B uses CPAB, LEAB, CEAB, OEAB; B-to-A uses CPBA, LEBA, CEBA, OEBA. Each path supports transparent mode (LE HIGH), edge-triggered latching (LE LOW + CP transition), and clock-gated operation (CE LOW).

It integrates bus hold circuitry on all 36 I/O pins (A0–A17, B0–B17), eliminating external pull-ups, and features 30 Ω series termination resistors on each output to suppress signal reflections in high-speed parallel buses. IOFF functionality disables outputs during partial power-down, blocking backflow current when VCC = 0 V.

Key Specifications

Pinout & Package

TSSOP56 package (SOT364-1), 56-pin plastic thin shrink small outline, 6.1 mm body width, 0.5 mm pitch - optimized for high-density PCB layouts with low inductance via multiple VCC/GND pins (4× VCC, 8× GND).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALVCH162601DGGR, the DGGS offers identical performance in tube packaging for lab use; versus 74LVC162245ADGG, it delivers superior signal integrity and reduced layout effort via on-die termination and bus hold-critical for noise-sensitive industrial backplanes.

Availability

74ALVCH162601DGGS is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory expansion modules, and FPGA carrier boards requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 74ALVCH162601DGGS 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-performance, reliable standard logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74ALVCH162601 belongs to Nexperia's advanced low-voltage CMOS logic family, engineered specifically for high-speed, low-noise parallel bus applications in space-constrained industrial systems.

FAQ

What is the purpose of the IOFF feature in the 74ALVCH162601DGGS?

The IOFF (power-off protection) circuit disables all outputs when VCC drops to 0 V, preventing reverse current flow from live bus lines into the powered-down device. This protects both the transceiver and upstream/downstream components during hot-swap events or partial power-down sequences in modular systems.

Can the 74ALVCH162601DGGS operate bidirectionally without external direction control logic?

Yes-the device uses independent OEAB/OEBA inputs to control direction per path. When OEAB = LOW and OEBA = HIGH, A→B is active while B→A is high-Z; reversing OE states enables B→A flow. No external direction line is needed because control is embedded in the enable signals.

How does the integrated 30 Ω termination resistor affect PCB layout?

The 30 Ω series resistor is placed internally between the output driver and the pin, so external termination is unnecessary. This eliminates 36 discrete resistors, reduces trace stubs, and improves impedance matching on FR-4 PCBs-especially beneficial for >50 MHz parallel buses routed over >10 cm lengths.

Is the bus hold function enabled by default, and can it be disabled?

Bus hold is always active on all 36 I/O pins and cannot be disabled via control inputs. It draws ±75 μA (min) at VCC = 3.0 V to maintain the last-driven logic state when inputs float, eliminating external pull resistors while adding negligible static power (<1.5 μW per pin).