74ALVCH16601DGG112

Overview

The 74ALVCH16601DGG112 is an 18-bit universal bus transceiver with 3-state outputs, manufactured by Nexperia. It operates within a supply voltage range of 1.65 V to 3.6 V and supports data flow in both directions controlled by output enable, latch enable, clock enable, and clock inputs. The device features bus hold inputs, low power CMOS dissipation, and direct interface with TTL levels. It includes IOFF circuitry for partial power-down applications and complies with JEDEC standards for various voltage ranges.

Feature Summary

• Provides 18-bit bidirectional data transfer with independent control for each direction via dedicated enable and clock signals.
• Incorporates bus hold functionality on data inputs to eliminate the need for external pull-up resistors.
• Features IOFF circuitry that disables outputs to prevent damaging backflow current during partial power-down states.
• Designed with low inductance multiple VCC and GND pins to minimize noise and ground bounce effects.

Applications

• High-density memory bus interfaces requiring 18-bit wide data paths
• System interconnects between microprocessors and peripheral devices
• Applications necessitating live insertion or extraction capabilities

Procurement Notes

Verify the specific ordering suffix '112' against official Nexperia documentation to confirm reel size or tape width specifications. Ensure the procurement channel sources genuine Nexperia products to guarantee compliance with the specified electrical characteristics and package dimensions. Cross-reference the part number with the latest product status information available on the manufacturer's website.

Selection Notes

Select this component when an 18-bit wide bidirectional interface is required with latching capability. It is suitable for systems operating at supply voltages between 1.65 V and 3.6 V. Consider its bus hold feature if external pull-ups are undesirable. Verify that the TSSOP56 package fits the PCB layout constraints and thermal requirements of the design.

Part Context

This device belongs to the ALVCH logic family, characterized by high-speed operation and compatibility with 3.3 V systems while accepting 5 V tolerant inputs. It serves as a registered bus transceiver, offering storage capability alongside transmission functions. The DGG variant indicates a plastic thin shrink small outline package with 56 leads, designed for surface-mount assembly.

Replacement Considerations

The 74ALVCH16601DGG is the base part number; verify if the '112' suffix denotes a specific packaging variation rather than a functional change. Direct pin-to-pin replacements must maintain the 18-bit width and 3-state output configuration. Check for updated revisions in the Nexperia portfolio to ensure availability and parameter consistency.

FAQ

How does the device handle data flow direction?

Data flow is controlled independently for A-to-B and B-to-A directions using separate output enable (OE), latch enable (LE), clock enable (CE), and clock (CP) inputs.

What is the purpose of the bus hold inputs?

Bus hold inputs maintain the last state of the data line, eliminating the need for external pull-up or pull-down resistors and preventing floating inputs.

Can this device be used in partial power-down modes?

Yes, it includes IOFF circuitry that automatically disables the outputs to prevent potentially damaging backflow current when the device is powered down.