SN74ALVCH162525DL

Overview

The SN74ALVCH162525DL is an 18-bit registered bus transceiver with 3-state outputs, manufactured by Texas Instruments. It operates within a supply voltage range of 1.65 V to 3.6 V and supports data rates up to 150 MHz at 3.3 V. The device features EPIC submicron CMOS technology and includes active bus-hold circuitry on data inputs. B-port outputs incorporate equivalent 26-Ω series resistors to reduce signal overshoot and undershoot without external components. It is housed in a 56-pin SSOP (DL) package and is characterized for operation from -40°C to +85°C.

Feature Summary

• Configurable pipeline register path for B-to-A data flow selection via the SEL input
• Integrated bus-hold circuitry eliminates the need for external pullup or pulldown resistors
• B-port outputs include internal series resistors to minimize signal reflections
• ESD protection exceeds 2000 V per MIL-STD-883 Method 3015

Applications

• High-density memory buffer applications
• Clock distribution networks requiring registered output buffering
• Bidirectional data bus architectures with asynchronous control
• System-level interconnects requiring configurable latency paths

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current availability status, as packages such as DGGR may be obsolete while DL variants remain active. Confirm RoHS compliance and lead finish specifications directly with the supplier. Ensure the selected package matches the required PCB footprint dimensions for the SSOP-56 configuration.

Selection Notes

Select this component when an 18-bit width is required for registered bus interfacing. The device supports dual-clock domains for A-to-B and B-to-A transfers. Consider the SEL pin functionality if variable pipeline depth is necessary for B-to-A data propagation. Verify that the 3.6 V maximum supply voltage aligns with the system power rails.

Part Context

This part belongs to the Texas Instruments Widebus family, utilizing Enhanced-Performance Implanted CMOS (EPIC) technology. It is designed for low-voltage digital systems requiring high-speed data transfer with built-in registration. The DL package variant provides a plastic shrink small-outline form factor suitable for surface-mount assembly.

Replacement Considerations

Check the manufacturer's official obsolescence notices for the DGGR tape-and-reel variant. Verify pin compatibility and electrical characteristics before substituting with other 18-bit registered transceivers.