Nexperia USA Inc. 74ALVCH16825DGGY

Overview

74ALVCH16825DGGY from Nexperia is an 18-bit non-inverting 3-state buffer/driver with dual 9-bit sections, bus hold circuitry, ±24 mA output drive at 3.0 V, and operation across 1.2 V to 3.6 V supply. It supports high-speed bus interfacing in industrial control backplanes and memory expansion modules where signal integrity and floating-input immunity are critical.

For engineers reviewing the 74ALVCH16825DGGY datasheet, 74ALVCH16825DGGY pinout, 74ALVCH16825DGGY application, or 74ALVCH16825DGGY equivalent, key selection criteria include dual independent 3-state enable architecture, TSSOP56 package thermal performance, bus hold current specifications (±75–150 μA), and propagation delay ≤3.4 ns at 3.3 V.

Technical Context

The device implements two electrically isolated 9-bit buffer sections, each controlled by two active-LOW output enable inputs (e.g., 1OE1/1OE2); both must be LOW for that section's outputs to drive - enabling precise per-section bus arbitration. Bus hold circuitry actively maintains unused data inputs at valid logic levels without external resistors.

It features low-inductance multiple VCC/GND pins to suppress ground bounce and noise, supports direct TTL-level interfacing, and meets JEDEC standards JESD8-7 (1.65–1.95 V), JESD8-5 (2.3–2.7 V), and JESD8C/JESD36 (2.7–3.6 V) for voltage compatibility across mixed-supply 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 automated SMT assembly and thermal dissipation in space-constrained industrial PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 18-bit 3-state buffer applications.

Compared with SN74ALVTH16825DGGR, the 74ALVCH16825DGGY offers integrated bus hold at lower drive and standard industrial temperature; versus 74LVC16244ADGG, it provides two extra bits and essential floating-input protection - making it uniquely suitable for full-width industrial bus buffering where reliability and pin-compatibility are critical.

Availability

74ALVCH16825DGGY is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory expansion modules, telecom line card buffering, and test equipment digital I/O requiring stable component supply across long-lifecycle deployments.

Supply support for 74ALVCH16825DGGY 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-volume, high-reliability logic, analog, and MOSFET solutions for industrial, automotive, and consumer markets.

The 74ALVCH series delivers advanced low-voltage CMOS buffers with bus hold and noise immunity - engineered specifically for robust parallel bus interfacing in harsh industrial environments.

FAQ

Does the 74ALVCH16825DGGY require external pull-up or pull-down resistors on unused inputs?

No. The device integrates active bus hold circuitry on all data inputs (1A0–1A8, 2A0–2A8), which maintains floating inputs at valid logic levels. This eliminates the need for external resistors, reducing BOM cost and PCB area while improving system reliability during power-up or signal disconnection.

What is the maximum operating frequency supported by the 74ALVCH16825DGGY in a 50 pF load environment?

With CL = 50 pF and VCC = 3.3 V, the maximum propagation delay is 3.4 ns (tpd), supporting reliable operation up to approximately 200–250 MHz in well-terminated parallel bus configurations. Timing margins must account for board trace delays and worst-case process/voltage/temperature variation.

Can the two 9-bit sections operate independently with different output enable signals?

Yes. Section 1 (1A0–1A8 → 1Y0–1Y8) is controlled by 1OE1 (pin 1) and 1OE2 (pin 56); Section 2 (2A0–2A8 → 2Y0–2Y8) uses 2OE1 (pin 28) and 2OE2 (pin 29). Both enables per section must be LOW for outputs to drive - enabling independent bus arbitration and partial-bus activation.

Is the 74ALVCH16825DGGY compliant with RoHS and REACH regulations?

Yes. As a Nexperia product manufactured after 2020 and documented in Rev. 4 (July 2024), the 74ALVCH16825DGGY conforms to EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with lead-free terminations and halogen-free molding compound per Nexperia's public compliance statements.