SN74ALVCH16334DLR

Overview

The SN74ALVCH16334DLR is a 16-bit universal bus driver with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 1.65 V to 3.6 V and utilizes the EPIC submicron process. The device features active bus-hold circuitry on data inputs, eliminating the need for external pullup or pulldown resistors. It is characterized for operation from -40 °C to 85 °C and is designed to comply with JEDEC 168-Pin and 200-Pin SDRAM buffered DIMM specifications.

Feature Summary

• Provides 16-bit universal bus driving capability with 3-state outputs controlled by an OE input.
• Features transparent mode when latch-enable (LE) is low, storing A data in the latch/flip-flop on the low-to-high transition of CLK when LE is high.
• Includes active bus-hold circuitry on data inputs to maintain valid logic levels for unused or floating lines.

Applications

• SDRAM buffered DIMM designs compliant with JEDEC 168-Pin and 200-Pin specifications
• High-density memory buffering systems
• Universal bus drivers requiring latching functionality

Procurement Notes

Verify the specific package variant against the datasheet, as the DL suffix denotes SSOP-48. Confirm RoHS compliance status and Moisture Sensitivity Level (MSL) ratings prior to ordering. Ensure design compatibility with the specified 1.65-V to 3.6-V operating voltage range and industrial temperature limits.

Selection Notes

Select this component for applications requiring 16-bit data latching and bus driving within the ALVCH family voltage range. Consider the SSOP-48 package constraints for PCB layout. Verify that the required clock frequency and propagation delay characteristics meet system timing requirements under the intended supply voltage conditions.

Part Context

This device belongs to the Texas Instruments Widebus family and is built using the Enhanced-Performance Implanted CMOS (EPIC) submicron process. It offers ESD protection exceeding 2000 V per MIL-STD-883 and latch-up performance exceeding 250 mA per JESD 17, ensuring robustness in high-density digital environments.

Replacement Considerations

Direct substitutes include SN74ALVCH16334DGGRE4, SN74ALVCH16334DGGRG4, SN74ALVCH16334DGVRE4, and SN74ALVCH16334DGVRG4. These alternatives share identical electrical characteristics but differ in package type (TSSOP or TVSOP) rather than function.

FAQ

How does the device handle unused or floating data inputs?

Active bus-hold circuitry is provided on the data inputs to hold unused or floating inputs at a valid logic level, eliminating the need for external pullup or pulldown resistors.

What is the behavior of the outputs during power up or power down?

To ensure the high-impedance state during power up or power down, the OE input should be tied to VCC through a pullup resistor, with the minimum value determined by the current-sinking capability of the driver.