74ALVCH16501ZQLR

Overview

The SN74ALVCH16501ZQLR is an 18-bit universal bus transceiver from the Texas Instruments Widebus family, designed for 1.65-V to 3.6-V VCC operation. It combines D-type latches and flip-flops for transparent, latched, or clocked modes. The device features a maximum propagation delay of 3.9 ns at 3.3 V and ±24-mA output drive capability. Bus hold on data inputs eliminates external pullup/pulldown resistors. Latch-up performance exceeds 250 mA per JESD 17, and ESD protection exceeds 2000-V human-body model ratings.

Feature Summary

• Combines D-type latches and flip-flops for versatile transparent, latched, or clocked operation
• Active bus-hold circuitry maintains valid logic states on unused or undriven inputs
• High ESD protection exceeding 2000-V human-body model standards
• Latch-up performance exceeding 250 mA per JESD 17 specification

Applications

• High-density memory buffer applications
• Clock drivers and buffered oscillators
• Multiplexer / demultiplexer circuits

Procurement Notes

Verify the specific ZQL package variant against the official datasheet ordering information to ensure correct pinout and thermal characteristics. Confirm that the lead finish and moisture sensitivity level align with your assembly process requirements. Cross-reference the full part number with the manufacturer's current production status to confirm availability.

Selection Notes

Select this component when designing systems requiring 18-bit wide data transfers within low-voltage environments. The device supports operation across a broad voltage range from 1.65 V to 3.6 V. Ensure control inputs are properly terminated to maintain device functionality during power transitions.

Part Context

This device belongs to the Texas Instruments ALVCH logic series, which utilizes advanced CMOS technology for high-speed operation. It is part of the broader Widebus family, providing standardized interfaces for various digital system architectures. The ZQL package designation indicates a specific microlead frame configuration suitable for surface-mount applications.

Replacement Considerations

Direct substitutes include SN74ALVCH16501DGGR and SN74ALVCH16501DL. Verify package compatibility and electrical specifications before substitution.