SN74ALVCH16524DL

Overview

The SN74ALVCH16524DL is an 18-bit registered bus transceiver with 3-state outputs from the Texas Instruments Widebus family. It operates on a supply voltage range of 1.65 V to 3.6 V and features a maximum propagation delay of 3.2 ns at 3.3 V. The device provides ±24-mA output drive capability and incorporates active bus-hold circuitry on data inputs to eliminate external pullup or pulldown resistors. Latch-up performance exceeds 250 mA per JESD 17, and ESD protection meets JESD 22 standards with 2000-V human-body model and 200-V machine model ratings.

Feature Summary

• Combines D-type latches and D-type flip-flops for transparent, latched, clocked, or clock-enable operation modes
• Features active bus-hold circuitry on data inputs to maintain valid logic states without external resistors
• Supports bidirectional data flow controlled by OEAB, OEBA, and CLKENBA inputs
• B-to-A data transfer can utilize a four-stage pipeline register path or a single register path based on SEL input state

Applications

• High-density memory buffer applications
• Clock distribution circuits requiring registered paths
• Bus-oriented systems utilizing UBT™ technology
• Portable equipment operating within low-voltage ranges

Procurement Notes

Verify the specific package type (SSOP-56) and ordering suffix (DL) against the required design specifications. Confirm that the -40°C to +85°C operating temperature range aligns with the environmental constraints of the target application. Ensure proper handling procedures are followed due to the CMOS construction and ESD sensitivity characteristics documented in the datasheet.

Selection Notes

Select this component when an 18-bit width is required alongside registered storage capabilities for the B-to-A direction. The inclusion of both transparent latch and flip-flop functionality allows flexible configuration for different timing requirements. Verify that the 1.65 V to 3.6 V supply range matches the system power rails and that the 3.2 ns propagation delay satisfies the maximum clock frequency needs of the design.

Part Context

This device belongs to the Texas Instruments ALVCH logic series, designed for advanced low-voltage CMOS applications. It is part of the Widebus family, which integrates universal bus transceiver (UBT) technology. The DL designation indicates the SSOP surface-mount package variant, providing a compact footprint suitable for high-density PCB layouts compared to larger through-hole options.

Replacement Considerations

Consult the official TI product selection guide for direct equivalents within the ALVCH family. Verify pin compatibility and electrical parameters before substituting with other 18-bit transceivers.