SN74LVTH2952DWR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LVTH2952DWR is an octal bus transceiver and register manufactured by Texas Instruments. It operates at a supply voltage (VCC) of 2.7 V to 3.6 V with TTL-compatible inputs up to 5.5 V. The device features two 8-bit back-to-back registers for bidirectional data storage, controlled by clock (CLK), clock-enable (CLKEN), and output-enable (OE) signals. It provides 3-state outputs with low-level output current (IOL) of 64 mA and high-level output current (IOH) of -32 mA. Propagation delay ranges from 1.2 ns to 5.5 ns depending on the signal path and voltage. It includes active bus-hold circuitry and supports hot insertion via Ioff and power-up 3-state features.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal bus transceivers and registers designed for low-voltage operation with 5-V tolerant interfaces
• Active bus-hold circuitry eliminates the need for external pullup or pulldown resistors
• Supports hot-insertion applications through Ioff and power-up 3-state capabilities
• Latch-up performance exceeds 500 mA per JESD 17 standards

Buffers, Drivers, Receivers, Transceivers Applications

• Mixed-mode signal systems requiring 5-V input/output compatibility with 3.3-V VCC
• Unregulated battery-powered operations down to 2.7 V
• Bidirectional data flow between buses with storage requirements

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific package variant against the datasheet ordering information, as the 'DWR' suffix indicates a tape-and-reel SOIC-20 package. Confirm that the required operating temperature range aligns with the SN74 series specifications (-40°C to +85°C). Ensure control inputs are properly terminated to VCC or GND during operation to maintain device functionality.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when bidirectional data transfer with internal storage is required in a 3.3-V system interfacing with 5-V logic. The LVTH series offers higher drive currents compared to standard LVC devices. Consider the propagation delays and setup/hold times for timing-critical designs. Verify that the 24-pin SOIC package fits the available PCB footprint constraints.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74LVTH family of BiCMOS octal bus transceivers and registers. It shares functional similarities with the SN74LVTH240 but adds register storage capabilities. The device is part of Texas Instruments' broader portfolio of mixed-signal logic ICs designed for low-voltage digital applications.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LVTH2952DW (Tube version)

Buffers, Drivers, Receivers, Transceivers FAQ

How does the device handle floating inputs?

The SN74LVTH2952 includes active bus-hold circuitry that holds unused or floating data inputs at a valid logic level, removing the requirement for external pullup or pulldown resistors.

What is the behavior during power-up?

When VCC is between 0 and 1.5 V, the device enters a high-impedance state. To ensure this state above 1.5 V, the OE pin should be tied to VCC through a pullup resistor to prevent driver conflict.