Nexperia USA Inc. 74ALVT16823DGGY

Overview

74ALVT16823DGGY from Nexperia is an 18-bit positive-edge-triggered D-type flip-flop with dual 9-bit register banks, 3-state outputs, independent master reset (nMR), clock enable (nCE), and output enable (nOE) per bank. It operates from 2.3 V to 3.6 V, delivers ±64 mA output drive, and supports 250 MHz maximum clock frequency at 3.3 V in industrial temperature range (−40 °C to +85 °C). It is used in high-speed bus interface applications for microprocessor data latching and address/data staging.

For engineers reviewing the 74ALVT16823DGGY datasheet, 74ALVT16823DGGY pinout, 74ALVT16823DGGY application, or 74ALVT16823DGGY equivalent, this page provides verified functional architecture, TSSOP56 package mapping, bus-hold input behavior, propagation delay specs (tPLH/tPHL ≤ 3.1 ns @ 3.3 V), and real-world timing constraints including set-up/hold times (tsu(H) = 1.0 ns, th(L) = −0.1 ns) critical for synchronous system integration.

Technical Context

The device implements two independent 9-bit parallel registers, each with dedicated nCP, nCE, nMR, and nOE control signals-enabling flexible partitioning as either one 18-bit or two synchronized 9-bit storage blocks. Clocking is strictly positive-edge-triggered, and nOE asserts high-impedance without affecting internal state.

Bus-hold circuitry on all 18 data inputs eliminates external pull-ups, while IOFF protection ensures partial power-down isolation when VCC = 0 V. Overvoltage-tolerant inputs (up to 5.5 V) allow safe interfacing with 5 V buses despite 2.3–3.6 V core operation.

Key Specifications

Pinout & Package

TSSOP56 plastic thin shrink small outline package (SOT364-1), 56-pin, 6.1 mm body width, 0.5 mm pitch, 1.2 mm max height - optimized for high-density PCB layouts with thermal and signal integrity in mind.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 18-bit bus-interface flip-flop applications.

Compared with SN74ALVTH16823DGGR and 74LVT16823DGGY, the 74ALVT16823DGGY uniquely combines industrial temperature range, 250 MHz speed, bus-hold inputs, and 5.5 V input tolerance - making it the only option qualified for demanding mixed-voltage, hot-swap-capable industrial backplanes.

Availability

74ALVT16823DGGY is available at Aetrix Electronics and suitable for microprocessor bus interface, memory address latching, industrial backplane staging, and hot-swappable module control requiring stable component supply across full industrial temperature range and long production lifecycles.

Supply support for 74ALVT16823DGGY 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 essential efficiency technologies - delivering high-performance logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74ALVT series targets high-speed, low-voltage bus interface applications where signal integrity, mixed-voltage compatibility, and robustness in harsh environments are critical design requirements.

FAQ

Does 74ALVT16823DGGY support true 5 V tolerant outputs?

No - its outputs are not 5 V tolerant in HIGH state; they swing to VCC (max 3.6 V). However, inputs tolerate up to 5.5 V, and the device can safely drive 5 V TTL buses due to its −32 mA sink capability and 0.55 V VOL at 64 mA, meeting TTL LOW-level thresholds. Output clamping is not provided, so external protection is required if driving beyond VCC + 0.5 V.

How does bus-hold functionality behave during power-up?

Bus-hold remains active during power-up as soon as VCC reaches ~1.2 V, retaining the last valid logic state on each data input. This prevents floating inputs from drifting and causing metastability in downstream logic. The feature operates independently of nOE/nMR and requires no configuration - it is inherent to the BiCMOS input structure.

Can both 9-bit banks operate with different clock frequencies?

Yes - 1CP and 2CP are electrically isolated inputs, allowing independent clock domains. Each bank responds only to its own nCP edge, and nCE/nOE/nMR are fully decoupled. This enables asynchronous staging of data streams, such as capturing sensor data on one bank while forwarding processed results on the other - provided setup/hold timing is met relative to each local clock.

What is the impact of IOFF circuitry on system-level power sequencing?

IOFF disables output drivers when VCC = 0 V, preventing reverse current flow from powered buses into the unpowered IC. This eliminates the need for external isolation diodes or complex power-rail sequencing in multi-supply systems - enabling safe "live" insertion into backplanes where VCC may ramp after other rails, and protecting upstream drivers from latch-up or overheating.