74ALVCH16501DGGS

Overview

The Nexperia 74ALVCH16501DGGS is an 18-bit universal bus transceiver featuring 3-state outputs and bus hold inputs. It operates within a supply voltage range of 1.2 V to 3.6 V, supporting CMOS low power dissipation and direct interface with TTL levels. The device provides ±24 mA current drive at VCC = 3.0 V and includes IOFF circuitry for partial power-down applications. It complies with JEDEC standards JESD8-7, JESD8-5, and JESD8C/JESD36, offering ESD protection exceeding 2000 V (HBM) and 1000 V (CDM). The component is specified for operation from -40 °C to +85 °C and utilizes a TSSOP56 plastic thin shrink small outline package.

Feature Summary

• Universal bus transceiver architecture incorporating D-type latches and flip-flops capable of transparent, latched, or clocked modes.
• Bus hold functionality integrated on all data inputs to maintain signal integrity.
• IOFF circuitry enables partial power-down mode by disabling outputs to prevent damaging backflow currents.
• Output drive capability designed for driving 50 Ω transmission lines at elevated temperatures.

Applications

• Bus-oriented applications requiring 3-state non-inverting outputs
• Mixed 3.3 V and 5 V logic environments
• Partial power-down system designs

Procurement Notes

Verify the specific ordering suffix DGGS corresponds to the TSSOP56 package variant during procurement. Confirm that the required temperature range aligns with the -40 °C to +85 °C specification. Ensure design compatibility with the active HIGH OEAB and active LOW OEBA control signals. Check for any recent product change notices regarding the SOT364-1 package version.

Selection Notes

Select this component when an 18-bit wide data path is required with flexible control over data flow direction. The inclusion of bus hold inputs simplifies PCB layout by reducing floating input risks. Verify that the operating voltage falls within the 1.2 V to 3.6 V range to ensure compliance with JEDEC standards. Consider the ±24 mA drive strength for load requirements.

Part Context

This part belongs to the Nexperia ALVCH logic family, which is optimized for low-voltage, high-speed applications. The 74ALVCH16501 serves as a universal transceiver, distinct from simple buffers or drivers due to its latch/flip-flop capabilities. It is manufactured in a 56-lead TSSOP package, providing a compact solution for high-density digital systems.

Replacement Considerations

Direct substitutes include the SN74ALVCH16501DGGR from Texas Instruments. Other compatible options may exist within the same ALVCH family from different manufacturers, provided pinouts and electrical characteristics match.

FAQ

How does the IOFF circuitry function in this device?

The IOFF circuitry disables the outputs when the device is powered down, preventing potentially damaging backflow current through the device.

What are the control inputs for A-to-B data flow?

A-to-B data flow is controlled by the output enable OEAB (active HIGH), latch enable LEAB, and clock CPAB inputs.