Nexperia USA Inc. 74ALVT162821DGGS

Overview

74ALVT162821DGGS from Nexperia is a 20-bit positive-edge-triggered D-type flip-flop with integrated 30 Ω series output termination resistors, dual independent clock (1CP/2CP) and output enable (1OE/2OE) controls, bus-hold inputs, and 3-state outputs-designed for high-speed 2.3 V to 3.6 V bus interface applications in telecom backplanes and industrial control I/O modules.

For engineers reviewing the 74ALVT162821DGGS datasheet, 74ALVT162821DGGS pinout, 74ALVT162821DGGS application, or 74ALVT162821DGGS equivalent, this device supports 150 MHz operation, 2.3–3.6 V supply compatibility, 5 V-tolerant inputs, ±12 mA drive strength, and TSSOP56 packaging-critical for noise-sensitive parallel data path synchronization and hot-swap-capable backplane interfaces.

Technical Context

This BiCMOS register implements two independent 10-bit D-flip-flop banks, each with dedicated clock and 3-state enable, enabling flexible partitioning of data paths. Its internal bus-hold circuitry eliminates external pull-ups on unused inputs, while IOFF protection ensures partial power-down isolation during VCC ramp-up/down.

The 30 Ω series termination at each output reduces signal reflections on controlled-impedance PCB traces, allowing direct connection to 5 V buses without external resistors. Propagation delays are specified down to 3.2 ns (tPLH/tPHL at 3.3 V), with set-up/hold times as low as 0.1 ns, supporting tight timing margins in high-density synchronous systems.

Key Specifications

Pinout & Package

TSSOP56 (SOT364-1) package: plastic thin shrink small outline, 56 leads, 6.1 mm body width, 0.5 mm lead pitch, 1.2 mm max height - optimized for high-density PCB layouts with thermal and EMI performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALVTH162821GR and 74LVC16374APAG, the 74ALVT162821DGGS uniquely combines 20-bit width, integrated 30 Ω termination, bus-hold, and 5 V tolerance in a single TSSOP56 package-reducing component count and improving signal integrity in space-constrained, high-reliability systems.

Availability

74ALVT162821DGGS is available at Aetrix Electronics and suitable for telecom backplane interfaces, industrial I/O modules, high-speed test equipment, and medical imaging data acquisition requiring stable component supply and long-term industrial lifecycle support.

Supply support for 74ALVT162821DGGS 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, reliable, and energy-efficient logic, analog, and discrete components for automotive, industrial, and consumer markets.

The 74ALVT family targets high-speed, low-voltage bus interface applications-designed specifically for robust signal integrity, mixed-voltage interoperability, and simplified system-level timing in infrastructure and industrial control systems.

FAQ

Does the 74ALVT162821DGGS support hot-swap operation?

Yes. The device features IOFF circuitry that disables I/O leakage when VCC = 0 V, plus power-up 3-state behavior and bus-hold inputs-enabling safe live insertion and extraction in backplane and modular systems without disrupting powered sections.

What is the purpose of the 30 Ω series resistors on each output?

These integrated resistors provide source termination matching typical PCB trace impedances (e.g., 50 Ω), reducing signal reflections and overshoot/undershoot on high-speed parallel buses-eliminating the need for 20 discrete 33 Ω resistors and improving signal integrity without layout overhead.

Can the 74ALVT162821DGGS interface directly with 5 V logic?

Yes. All inputs are overvoltage tolerant up to 5.5 V, and outputs drive ±12 mA into 5 V buses. This allows direct connection to legacy 5 V peripherals without level-shifting circuitry-verified across the full −40 °C to +85 °C temperature range.

How does the dual-bank architecture improve system timing flexibility?

Separate 1CP/2CP and 1OE/2OE controls allow independent latching and 3-state management of two 10-bit data groups-enabling time-multiplexed bus access, staggered sampling windows, or fault-isolated data paths without external multiplexers or additional clock domain crossing logic.