NXP Semiconductors 74ALVT16823DGG512

Overview

74ALVT16823DGG512 from Nexperia is an 18-bit positive-edge-triggered D-type flip-flop with independent 9-bit register sections, 3-state outputs, master reset (nMR), clock enable (nCE), and output enable (nOE). It operates across 2.3 V–3.6 V supply, delivers ±64 mA output drive, and supports 250 MHz maximum clock frequency at 3.3 V. It serves as a high-speed bus interface latch in memory address/data buffering and FPGA I/O expansion.

For engineers reviewing the 74ALVT16823DGG512 datasheet, 74ALVT16823DGG512 pinout, 74ALVT16823DGG512 application, or 74ALVT16823DGG512 equivalent, key selection considerations include its dual 9-bit register architecture, bus hold inputs eliminating external pull-ups, IOFF power-down capability, and overvoltage-tolerant 5.5 V inputs enabling mixed-voltage system interfacing.

Technical Context

This device implements two independent 9-bit parallel registers, each with dedicated clock (nCP), clock enable (nCE), master reset (nMR), and output enable (nOE) controls. Its BiCMOS process enables TTL-level compatibility and high-speed operation while maintaining low static current (≤0.1 mA typical at 3.6 V).

The flip-flop uses positive-edge clock triggering with set-up/hold times as low as 0.1 ns (th(L)) at 3.3 V, and features integrated bus hold circuitry on all data inputs to maintain valid logic states on unused pins without external resistors. Power-up 3-state and IOFF partial power-down ensure safe hot-plug operation and system-level power sequencing.

Key Specifications

Pinout & Package

Package: TSSOP56 (SOT364-1), plastic thin shrink small outline package; 56 leads; body width 6.1 mm; 1.2 mm max height.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74ALVTH16823DGGR and 74LVC16374ADGG, the 74ALVT16823DGG512 uniquely combines 5.5 V input tolerance, bus hold, and IOFF in a single 56-pin TSSOP package - making it the only option supporting mixed-voltage hot-swap interfaces without external components.

Availability

74ALVT16823DGG512 is available at Aetrix Electronics and suitable for industrial control systems, FPGA-based prototyping platforms, automated test equipment, and memory subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74ALVT16823DGG512 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 logic, analog, and MOSFET solutions optimized for efficiency and miniaturization in industrial, automotive, and consumer electronics.

The 74ALVT16823 belongs to Nexperia's advanced ALVT logic family, designed specifically for high-speed, low-voltage bus interfacing in mixed-signal systems where timing precision, voltage flexibility, and robustness are critical.

FAQ

What is the maximum clock frequency supported by the 74ALVT16823DGG512?

The 74ALVT16823DGG512 supports a maximum clock frequency of 250 MHz when operated at VCC = 3.3 V, as specified in Table 7 of the datasheet. At 2.5 V supply, the maximum frequency is 150 MHz. These values reflect guaranteed performance across the full −40 °C to +85 °C operating range with appropriate load conditions (50 pF, 500 Ω).

Does the 74ALVT16823DGG512 require external pull-up resistors on unused data inputs?

No, the 74ALVT16823DGG512 does not require external pull-up resistors on unused data inputs because it integrates bus hold circuitry on all D-inputs (1D0–1D8 and 2D0–2D8). This feature actively maintains the last valid logic state, eliminating floating inputs and reducing BOM complexity and PCB space.

Can the 74ALVT16823DGG512 safely interface with 5 V logic signals?

Yes, the 74ALVT16823DGG512 supports 5.5 V overvoltage-tolerant inputs, allowing direct connection to 5 V TTL or CMOS signals without level-shifting circuitry. Input voltage ratings remain valid even when VCC is at 2.3 V or 3.3 V, enabling robust mixed-voltage system integration.

What is the purpose of the IOFF functionality in the 74ALVT16823DGG512?

The IOFF (power-off protection) circuitry in the 74ALVT16823DGG512 disables output drivers when VCC = 0 V, preventing current backflow from powered bus lines into the unpowered IC. This feature is essential for live insertion/extraction and hot-swap applications, ensuring system-level safety and reliability during maintenance or reconfiguration.

How many independent control sections does the 74ALVT16823DGG512 provide?

The 74ALVT16823DGG512 provides two independent 9-bit control sections: Section 1 (pins 1MR, 1CP, 1CE, 1OE, 1D0–1D8, 1Q0–1Q8) and Section 2 (pins 2MR, 2CP, 2CE, 2OE, 2D0–2D8, 2Q0–2Q8). Each section has dedicated reset, clock, enable, and output enable signals, enabling flexible partitioning of bus resources.