SN74AVC16835DGGR

Overview

The SN74AVC16835DGGR is an 18-bit universal bus driver with 3-state outputs manufactured by Texas Instruments. It operates at a supply voltage (VCC) range of 1.2 V to 3.6 V, specifically designed for 1.65 V to 3.6 V applications. The device features Dynamic Output Control (DOC) circuitry that dynamically adjusts output impedance to reduce noise without degrading speed. It supports partial-power-down mode via Ioff circuitry and includes overvoltage-tolerant inputs and outputs for mixed-voltage communication. The component is housed in a 56-pin TSSOP package.

Feature Summary

• Dynamic Output Control (DOC) circuitry dynamically changes output impedance to lower it during signal transitions for effective load driving, then raises it to reduce electromagnetic noise.
• Overvoltage-tolerant inputs and outputs enable safe data communications between systems operating at different voltage levels.
• Integrated Ioff circuitry disables the outputs automatically when the device is powered down to prevent damaging current backflow through the device.
• High electrostatic discharge (ESD) protection capabilities exceed standard requirements for human-body and machine models.

Applications

• Mixed-voltage-mode data communications
• Partial-power-down mode operation
• Universal bus drivers requiring low-noise performance

Procurement Notes

Verify the specific ordering suffix 'DGGR' corresponds to the TSSOP-56 package and tape-and-reel carrier format. Confirm the manufacturer is Texas Instruments and check the product status as active production. Ensure the datasheet revision matches the required specifications for your design constraints.

Selection Notes

Select this component when designing systems requiring 18-bit data transfer across mixed-voltage domains. The DOC feature makes it suitable for high-speed interfaces where signal integrity and noise reduction are critical. Verify that the system's power sequencing allows for proper handling of the OE pin to ensure high-impedance states during power-up or power-down events.

Part Context

This device belongs to the Widebus family of logic components from Texas Instruments. It is part of the SN74AVC series, which focuses on advanced voltage translation and bus driving capabilities. The DGGR suffix indicates the specific 56-pin Thin Shrink Small Outline Package (TSSOP) configuration supplied in a tape-and-reel format for automated assembly.

Replacement Considerations

Consult official substitution guides for equivalent parts within the SN74AVC or SN74ALVCH families. Verify pin compatibility and electrical characteristics such as propagation delay and drive strength before replacing the component in an existing design.

FAQ

How does the Dynamic Output Control (DOC) circuit function?

The DOC circuit initially lowers the output impedance during signal transitions to effectively drive the load, and subsequently raises the impedance to reduce noise, maintaining speed without degradation.

What is the purpose of the Ioff circuitry in this device?

The Ioff circuitry supports partial-power-down mode by disabling the outputs when the device is powered down, preventing damaging current backflow through the device.