74ALVCH16500DGGS

Overview

The Nexperia 74ALVCH16500DGGS is an 18-bit universal bus transceiver with 3-state outputs and bus hold inputs. It operates within a supply voltage range of 1.65 V to 3.6 V, supporting CMOS low power dissipation. The device features independent A-to-B and B-to-A data flow control via output enable (OEAB/OEBA), latch enable (LEAB/LEBA), and clock (CPAB/CPBA) inputs. It includes IOFF circuitry for partial power-down applications to prevent backflow current. The component utilizes a TSSOP56 package (SOT364-1) and complies with JEDEC standards JESD8-7, JESD8-5, and JESD8C/JESD36.

Feature Summary

• Supports bidirectional data transfer with independent control over each direction using dedicated enable, latch, and clock inputs.
• Incorporates bus hold functionality on data inputs to maintain signal states without external pull-up or pull-down resistors.
• Features IOFF circuitry that disables outputs during partial power-down conditions to eliminate potentially damaging backflow currents.
• Designed with low inductance multiple VCC and GND pins to minimize noise and ground bounce effects.

Applications

• High-density memory interface circuits
• Clock distribution networks
• Control signal routing in embedded systems

Procurement Notes

Verify the specific ordering suffix DGGS corresponds to the TSSOP56 plastic thin shrink small outline package with 56 leads. Confirm the temperature range requirement matches the specified -40 °C to +85 °C operating limit. Ensure design compatibility with the required supply voltage range of 1.65 V to 3.6 V before procurement.

Selection Notes

Select this component when an 18-bit wide data path requires independent directional control and latching capabilities. The ALVCH family provides direct interface compatibility with TTL levels at higher supply voltages. Consider the TSSOP56 package constraints regarding board space and thermal management requirements for high-density layouts.

Part Context

This device belongs to the Nexperia 74ALVCH logic family, which offers advanced low-voltage CMOS technology. It shares functional similarities with other universal bus transceivers but is distinguished by its 18-bit width and specific pin-out architecture designed for multibyte data transfers.

Replacement Considerations

Check for compatible 18-bit universal bus transceivers from the same manufacturer family. Verify pinout compatibility and electrical specifications such as supply voltage range and propagation delay times before substituting.