Nexperia USA Inc. 74ALVCH162827DGG,1

Overview

74ALVCH162827DGG,1 from Nexperia is a 20-bit non-inverting CMOS buffer/line driver with integrated 30 Ω termination resistors, dual 10-bit 3-state output control (nOE1/nOE2), bus hold inputs, and IOFF partial power-down protection. It operates from 2.3 V to 3.6 V, delivers ±12 mA drive at 3.0 V, and is used in high-speed parallel bus interfaces requiring signal integrity and low-noise drive in industrial backplanes and memory subsystems.

For engineers reviewing the 74ALVCH162827DGG,1 datasheet, 74ALVCH162827DGG,1 pinout, 74ALVCH162827DGG,1 application, or 74ALVCH162827DGG,1 equivalent, this page provides verified functional context, TSSOP56 package mapping, bus hold behavior, propagation delay (≤4.2 ns at 3.3 V), and direct TTL-level compatibility-critical for DDR memory interface buffering and FPGA I/O expansion designs.

Technical Context

This device implements two independent 10-bit non-inverting buffers, each controlled by dedicated active-low enable inputs (1OE1/1OE2 and 2OE1/2OE2), enabling selective bus segmentation. Its bus hold circuitry maintains valid logic states on floating inputs without external pull-ups, reducing system component count.

The integrated 30 Ω series termination resistors are placed between internal output drivers and pins, minimizing reflections on transmission lines up to 100 MHz. IOFF functionality ensures outputs enter high-impedance state during power-down, blocking damaging backflow current when VCC = 0 V while other rails remain active.

Key Specifications

Pinout & Package

TSSOP56 (SOT364-1) package: 56-pin plastic thin shrink small outline, 6.1 mm body width, 0.5 mm pitch, with 8 ground pins and 4 VCC pins for low-inductance power delivery and minimized ground bounce.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 20-bit buffer applications.

Compared with SN74ALVCH162827DGGR, the 74ALVCH162827DGG,1 offers identical electrical performance but differs in packaging and environmental compliance; versus 74LVC162244ADGG,118, it adds bus hold, IOFF, and integrated termination-reducing BOM count by ≥20 passive components and enabling safer partial-power-down operation.

Availability

74ALVCH162827DGG,1 is available at Aetrix Electronics and suitable for DDR memory subsystems, FPGA I/O expansion, industrial backplane interfaces, and legacy parallel port repeaters requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.

Supply support for 74ALVCH162827DGG,1 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 logic, analog, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for industrial, computing, and communications markets.

This device belongs to the ALVCH advanced low-voltage CMOS logic family, designed specifically for high-speed, low-noise parallel bus interfacing in power-constrained and signal-integrity-critical applications.

FAQ

What is the purpose of the bus hold feature on the 74ALVCH162827DGG,1?

The bus hold circuit actively maintains the last-valid logic state on each input pin when no driving signal is present, eliminating the need for external pull-up or pull-down resistors. It draws ±45 μA at 2.3 V to sustain stable HIGH or LOW levels, preventing floating inputs from causing undefined logic transitions or increased system power consumption due to input stage oscillation.

Can the 74ALVCH162827DGG,1 be used in mixed-voltage systems with both 2.5 V and 3.3 V domains?

Yes-the device is fully specified from 2.3 V to 3.6 V and supports direct interface with TTL levels. Its VIH (min 2.0 V at VCC = 3.3 V) and VIL (max 0.8 V) thresholds ensure reliable recognition of 2.5 V domain outputs as valid logic HIGH/LOW, while its ±12 mA drive at 3.0 V can source/sink into 2.5 V CMOS inputs without level-shifting circuitry.

How does the IOFF feature protect the device during partial power-down?

When VCC drops to 0 V while other system rails remain active, the IOFF circuit disables all outputs and blocks current flow from powered I/O lines into the unpowered device. This prevents destructive back-current through the output clamps, satisfying JEDEC JESD78 latch-up immunity requirements and enabling safe hot-swap operation in modular systems.

Are the integrated 30 Ω termination resistors placed on the input or output side of the driver?

The 30 Ω resistors are placed in series between the internal output driver and the output pin-i.e., on the output side-providing source-series termination. This configuration damps signal reflections at the driver end of transmission lines, making it ideal for point-to-point or short-stub multidrop topologies with characteristic impedance near 50 Ω.