NXP Semiconductors 74ABT16821ADGG,118

Overview

74ABT16821ADGG,118 from Nexperia is a 20-bit bus-interface D-type flip-flop with positive-edge triggering and 3-state outputs, implemented in high-performance BiCMOS technology. It integrates two independent 10-bit edge-triggered registers, each with dedicated clock (nCP) and output enable (nOE) controls, delivering ±64 mA output drive for driving heavily loaded buses, MOS memories, or microprocessor data paths in industrial computing systems.

For engineers reviewing the 74ABT16821ADGG,118 datasheet, 74ABT16821ADGG,118 pinout, 74ABT16821ADGG,118 application, or 74ABT16821ADGG,118 equivalent, this device serves as a high-speed, low-noise bus interface register for synchronous data latching and 3-state bus arbitration in memory expansion, peripheral interfacing, and backplane data routing applications.

Technical Context

The 74ABT16821ADGG,118 implements dual 10-bit D-type flip-flop sections, each fully edge-triggered on the rising edge of its respective clock input (1CP or 2CP). Register state transfer occurs one setup time before the LOW-to-HIGH clock transition, ensuring deterministic timing alignment across all 20 bits.

Its 3-state output buffers are independently controlled by active-LOW output enable inputs (1OE and 2OE), enabling selective bus access without affecting register contents. Multiple VCC and GND pins minimize switching noise, and power-up 3-state and power-up reset ensure defined initial states during system initialization.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LVT16821DGG,118 and SN74ALVTH16821GR, the 74ABT16821ADGG,118 delivers higher speed (160 MHz vs ≤150 MHz), stronger drive (±64 mA vs ≤±32 mA), and superior noise immunity via distributed power/ground pins - making it optimal for legacy 5 V industrial bus interfaces where timing margin and load driving are critical.

Availability

74ABT16821ADGG,118 is available at Aetrix Electronics and suitable for industrial computing, automotive control modules, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74ABT16821ADGG,118 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 leader in high-volume production of logic, discrete, and power MOSFET semiconductors, spun off from NXP in 2017 and focused on automotive, industrial, and computing markets.

The 74ABT16821ADGG,118 belongs to Nexperia's ABT logic family, engineered for high-speed, low-noise 5 V bus interfacing in mission-critical industrial and automotive control systems where reliability and timing precision are paramount.

FAQ

What is the maximum clock frequency supported by the 74ABT16821ADGG,118 across its full operating temperature range?

The 74ABT16821ADGG,118 guarantees a minimum clock frequency of 160 MHz over the full −40 °C to +85 °C ambient temperature range, as specified in Table 7 of the official Nexperia datasheet Rev. 03. This value reflects worst-case timing under 5.0 V ±0.5 V supply conditions and accounts for process, voltage, and temperature variation.

Does the 74ABT16821ADGG,118 support live insertion, and what design features enable this capability?

Yes, the 74ABT16821ADGG,118 supports live insertion and extraction. This is enabled by its power-up 3-state behavior - outputs remain in high-impedance until VCC stabilizes - and robust latch-up protection exceeding 500 mA per JESD78B Class II Level A, preventing destructive current flow during hot-plug events.

How many power and ground pins does the 74ABT16821ADGG,118 have, and why is this significant?

The 74ABT16821ADGG,118 has four VCC pins (7, 22, 35, 50) and eight GND pins (4, 11, 18, 25, 32, 39, 46, 53). This distributed power/ground architecture minimizes simultaneous switching noise and voltage droop across the 20-bit output bank, preserving signal integrity and timing margins in high-speed bus applications.

What are the absolute maximum ratings for supply voltage and junction temperature of the 74ABT16821ADGG,118?

The 74ABT16821ADGG,118 has an absolute maximum supply voltage (VCC) of −0.5 V to +7.0 V and a maximum junction temperature (Tj) of 150 °C, as defined in Table 4 of the Nexperia datasheet. Exceeding these limits risks permanent device damage, even momentarily.

Can the 74ABT16821ADGG,118 be used in 3.3 V systems, and what are the implications?

The 74ABT16821ADGG,118 is designed for 4.5–5.5 V operation and is not characterized for reliable 3.3 V use. While it may function at 3.3 V in some cases, VIH/VIL thresholds and output drive degrade significantly, and timing parameters become invalid. For 3.3 V systems, Nexperia's 74LVT16821DGG,118 is the appropriate alternative.