74ALVCH16500DGG112

Overview

The 74ALVCH16500 is an 18-bit universal bus transceiver with bus hold inputs and 3-state outputs. It operates on a wide supply voltage range from 1.65 V to 3.6 V. Data flow in each direction is controlled by output enable, latch enable, and clock inputs. The device supports partial power down applications using IOFF circuitry to prevent backflow current. It features low inductance multiple VCC and GND pins for minimum noise and ground bounce.

Feature Summary

• Universal data flow control via dedicated output enable, latch enable, and clock inputs for both A-to-B and B-to-A directions.
• Integrated bus hold functionality on data inputs to maintain stable logic states.
• IOFF circuitry enables safe partial power down operation by disabling outputs to prevent damaging backflow currents.
• Low inductance design with multiple VCC and GND pins to minimize electrical noise and ground bounce.

Applications

• Partial power down system architectures
• High-speed data bus interfacing
• TTL level direct interface applications

Procurement Notes

Verify the specific ordering suffix against official Nexperia documentation to confirm package type and temperature range. Confirm that the component meets all required JEDEC standards for your target operating voltage. Ensure compatibility with existing board layouts regarding the TSSOP56 footprint and pin configuration before finalizing procurement.

Selection Notes

Select this component when designing systems requiring 18-bit bidirectional data transfer with independent latching capabilities. It is suitable for applications needing direct TTL level interfacing within the specified voltage range. Consider the low inductance package benefits for high-speed signal integrity requirements in dense circuit designs.

Part Context

This device belongs to the ALVCH logic family, characterized by CMOS low power dissipation and wide supply voltage compatibility. It utilizes a MULTIBYTE flow-through standard pin-out architecture. The component is manufactured by Nexperia and is available in a plastic thin shrink small outline package.

Replacement Considerations

Consult official Nexperia cross-reference guides for verified substitutes. Ensure any replacement maintains identical 18-bit width, 3-state output capability, and compatible package dimensions.

FAQ

How does the device handle partial power down conditions?

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

What controls the data flow direction between ports A and B?

Data flow is controlled by separate output enable (OEAB/OEBA), latch enable (LEAB/LEBA), and clock (CPAB/CPBA) inputs for each direction.