Nexperia USA Inc. 74ALVT162821DGG:11

Overview

74ALVT162821DGG:11 from Nexperia is a 20-bit positive-edge-triggered D-type flip-flop with integrated 30 Ω series output termination resistors, dual independent 10-bit sections (1CP/1OE and 2CP/2OE), bus-hold inputs, and 3-state outputs. It operates from 2.3 V to 3.6 V, supports 5 V I/O tolerance, and is rated for -40 °C to +85 °C. Used in high-speed parallel bus interfaces requiring clean signal integrity without external termination.

For engineers reviewing the 74ALVT162821DGG:11 datasheet, 74ALVT162821DGG:11 pinout, 74ALVT162821DGG:11 application, or 74ALVT162821DGG:11 equivalent, this page delivers verified functional architecture, timing behavior under 2.5 V/3.3 V supply, bus-hold current specs, propagation delays (tPLH/tPHL ≤ 5.0 ns at 3.3 V), and TSSOP56 package layout - all critical for synchronous data capture in backplane or memory interface designs.

Technical Context

This device implements two independent 10-bit D-register sections, each with dedicated clock (nCP) and output enable (nOE) inputs. Each section latches data on the LOW-to-HIGH transition of its respective clock, with set-up time as low as 0.1 ns and hold time down to 0.1 ns at 3.3 V.

Bus-hold circuitry maintains valid logic states on unused data inputs without external pull-ups, while IOFF protection enables partial power-down during hot insertion. The 30 Ω series resistor per output eliminates need for external termination on 50 Ω transmission lines, reducing board space and signal reflections in high-speed parallel buses.

Key Specifications

Pinout & Package

TSSOP56 plastic thin shrink small outline package (SOT364-1), 56-pin, body width 6.1 mm, 0.5 mm pitch, lead finish matte tin.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 20-bit registered bus interface applications.

Compared with SN74ALVTH162821DGGR, the 74ALVT162821DGG:11 offers lower ICC and faster enable/disable transitions; versus 74LVT162821DGG, it adds essential bus-hold and IOFF for robustness in real-world industrial deployments.

Availability

74ALVT162821DGG:11 is available at Aetrix Electronics and suitable for high-speed backplane interfaces, memory expansion modules, industrial PLC I/O subsystems, and test equipment pattern generators requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74ALVT162821DGG:11 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, high-reliability standard logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74ALVT family targets high-speed, low-voltage parallel bus applications where signal integrity, power efficiency, and mixed-voltage interoperability are critical - especially in infrastructure and industrial control systems.

FAQ

What is the maximum clock frequency supported by the 74ALVT162821DGG:11?

The device supports a maximum clock frequency of 150 MHz across the full operating temperature range (-40 °C to +85 °C) and supply voltages (2.3 V to 3.6 V), as confirmed by fmax specifications in the dynamic characteristics table under both 2.5 V and 3.3 V conditions.

Does the 74ALVT162821DGG:11 require external pull-up resistors on unused data inputs?

No. All data inputs feature integrated bus-hold circuitry that actively maintains the last-valid logic state without external components. Typical bus-hold currents are +75 μA (LOW) and -75 μA (HIGH) at 3 V, eliminating need for pull-ups in floating-input scenarios.

Can the 74ALVT162821DGG:11 safely interface with a 5 V bus while powered from 3.3 V?

Yes. Inputs are overvoltage tolerant up to 5.5 V, and outputs are 5 V I/O compatible - meaning they can drive or be driven by 5 V logic levels without damage or level-shifting, even when VCC is as low as 2.3 V.

How does the integrated 30 Ω output resistor affect signal integrity on a 50 Ω transmission line?

The 30 Ω series resistor, combined with typical PCB trace impedance (~50 Ω) and load capacitance, forms a controlled-impedance source termination that suppresses reflections at the driver end. This reduces overshoot/ringing by >30% compared to unterminated drivers, improving eye diagram opening in parallel bus applications.