SN74LVC861APWR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LVC861A is a 10-bit bus transceiver with 3-state outputs designed for asynchronous communication between data buses. It operates from a supply voltage range of 1.65 V to 3.6 V and features inputs that accept voltages up to 5.5 V, supporting mixed-mode signal operation on all ports. The device allows bidirectional data transmission between the A and B buses based on logic levels at the OEAB and OEBA control inputs. It includes dedicated Ioff circuitry to support partial-power-down mode, preventing damaging current backflow when powered down. Maximum propagation delay is specified as 6.4 ns at 3.3 V.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Supports mixed-mode signal operation allowing 5-V input/output voltage compatibility with 3.3-V VCC
• Includes Ioff circuitry to disable outputs during power-down and prevent damaging current backflow
• Provides flexible timing control through independent output-enable (OEAB and OEBA) inputs

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous communication between data buses in mixed-voltage systems
• Partial-power-down applications requiring isolation during power-off states
• Bidirectional level translation between 3.3-V and 5-V system environments

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific package variant required for the design, such as TSSOP (PW), SSOP (DB), or SOIC (DW). Confirm that the ordering suffix matches the desired tape-and-reel quantity or tube packaging. Ensure the component meets the -40°C to +85°C operating temperature range requirements for the target application environment.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring 10-bit wide asynchronous data transfer between different voltage domains. It is suitable for applications needing high-impedance isolation during power cycles without external resistors. Consider the maximum propagation delay specifications relative to the system clock speeds to ensure timing margins are met.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the Texas Instruments LVC logic family, which is optimized for low-voltage digital applications. It functions as a bidirectional buffer facilitating data flow control between two distinct bus architectures. The internal architecture supports simultaneous enable/disable capabilities for independent direction control.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LVC861ADW

Buffers, Drivers, Receivers, Transceivers FAQ

How does the device handle partial-power-down scenarios?

The SN74LVC861A incorporates Ioff circuitry that automatically disables the outputs when the device is powered down, preventing damaging current backflow through the device.

Can this transceiver interface 5-V devices with 3.3-V supplies?

Yes, the inputs accept voltages up to 5.5 V, allowing the device to support mixed-mode signal operation where 5-V input/output voltage is used with a 3.3-V VCC.