SN74ABT18646PM: 18-Bit Universal Bus Transceivers with 3-State Outputs

The SN74ABT18646PM from Texas Instruments is a high-performance, 18-bit universal bus transceiver that is designed to facilitate bidirectional communication between two buses. This integrated circuit (IC) is part of the ABT family, which is known for its advanced BiCMOS technology, providing a perfect balance between speed and power consumption.

With its dual-in-line 56-pin plastic SSOP (Shrink Small Outline Package), the SN74ABT18646PM is engineered for space-efficient applications where board real estate is at a premium. The device is capable of operating over a wide temperature range, making it suitable for various industrial and commercial environments.

The transceiver features two separate 18-bit bus transceiver sections, each with 3-state outputs. The 3-state outputs allow for connection to a bus-oriented system, enabling high-speed data transfer while maintaining a high degree of signal integrity. This is particularly useful in applications such as data multiplexing, memory interleaving, and bidirectional data paths on multi-master buses.

The SN74ABT18646PM is equipped with control functions that are independent of each other, providing flexibility in operation. The output-enable (OE) inputs and direction (DIR) inputs determine the direction of data flow and the active state of the outputs. In addition, the device has a latch-up performance that exceeds 250 mA per JESD 17, ensuring robust performance in the event of over-current conditions.

For systems requiring logic-level translation, the SN74ABT18646PM operates with a 5-V V_CC supply while maintaining compatibility with TTL input and output logic levels. This makes it an ideal choice for interfacing between 5-V and 3.3-V systems, or for upgrading legacy systems that require higher performance without changing the logic voltage.

Overall, the SN74ABT18646PM is a versatile and reliable solution for designers looking to improve data bus efficiency and performance. Its advanced features and Texas Instruments' commitment to quality make it a valuable component in a wide range of digital applications, including servers, networking equipment, and high-speed data processing systems.