Nexperia USA Inc. 74ALVCH16500DGGS

Overview

74ALVCH16500DGGS from Nexperia is an 18-bit universal bus transceiver with bidirectional data flow control, bus hold inputs, and 3-state outputs. It supports A↔B data transfer via independent OE/LE/CP controls (OEAB active HIGH, OEBA active LOW), operates from 1.65 V to 3.6 V, features IOFF partial power-down protection, and is rated for -40 °C to +85 °C. It is used in high-density PCB interconnects between FPGAs and memory subsystems requiring level translation and bus contention avoidance.

For engineers reviewing the 74ALVCH16500DGGS datasheet, 74ALVCH16500DGGS pinout, 74ALVCH16500DGGS application, or 74ALVCH16500DGGS equivalent, key selection criteria include dual-direction latch/clock enable timing (tPLH ≤ 4.2 ns at 3.3 V), ±24 mA drive strength, bus hold current (IBHH = −175 μA at 3.0 V), and TSSOP56 package compatibility with 0.5 mm pitch routing constraints.

Technical Context

This transceiver implements two independent 18-bit data paths with separate output enables (OEAB/OEBA), latch enables (LEAB/LEBA), and clocks (CPAB/CPBA). Each path supports transparent mode (LE HIGH), latch-on-level mode (LE LOW + CP static), and edge-triggered clock mode (LE LOW + CP falling edge).

Its IOFF circuit disables outputs during power-down to prevent backflow current, while bus hold inputs maintain valid logic states without external pull-ups. The device meets JEDEC JESD8-7/8-5/36 voltage standards and delivers 50 Ω transmission line drive capability at 85 °C.

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. Features multiple VCC/GND pins (4×VCC, 10×GND) for low-noise operation and minimized ground bounce.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar universal bus transceiver applications.

Compared with SN74ALVTH16500GR and 74LVC16500ADGG, the 74ALVCH16500DGGS uniquely balances industrial temperature range, IOFF safety, and TSSOP56 footprint compatibility-making it optimal for retrofit upgrades and space-constrained industrial controllers where layout reuse is critical.

Availability

74ALVCH16500DGGS is available at Aetrix Electronics and suitable for FPGA interconnects, memory expansion modules, industrial PLC backplanes, and hot-swappable mezzanine card interfaces requiring stable component supply across multi-year production cycles.

Supply support for 74ALVCH16500DGGS 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, computing, and consumer markets.

The 74ALVCH16500 belongs to Nexperia's advanced ALVCH logic family, engineered specifically for low-voltage, high-speed bidirectional bus interfacing in space-constrained embedded systems with stringent power and noise requirements.

FAQ

What is the minimum recommended VCC for guaranteed operation of 74ALVCH16500DGGS?

The device is fully specified from 1.65 V to 3.6 V per JEDEC JESD8-7. At 1.65 V, VIH is 1.2 V and VOL is ≤0.4 V with 12 mA load, meeting TTL-compatible thresholds. Operation below 1.65 V risks undefined logic states and violates absolute maximum ratings.

Can OEAB and OEBA be asserted simultaneously without conflict?

Yes - asserting both OEAB (HIGH) and OEBA (LOW) simultaneously places all A0–A17 and B0–B17 pins in high-impedance state. This is explicitly supported in the functional table and enables complete bus isolation during system reset or configuration phases.

Does the bus hold feature remain active during IOFF mode?

No - bus hold circuitry is disabled when VCC drops below ~0.8 V and IOFF activates. Bus hold only functions during normal powered operation (VCC ≥ 1.65 V); external termination is required if data lines must retain state during power-down.

What is the maximum sustained clock frequency for CPAB/CPBA in latch mode?

Per dynamic characteristics, fmax is 340 MHz at VCC = 3.0–3.6 V. However, in latch mode (LEAB = LOW), CPAB serves only as a level-sensitive enable - not a clock - so no maximum frequency applies. Only pulse width (tw ≥ 1.1 ns) and set-up/hold timing must be observed.