SN74CBTLV16800GR

The SN74CBTLV16800GR from Texas Instruments is a 20-bit FET bus switch, part of the Widebus family. This device offers high-speed bus switching capabilities with a low on-state resistance of typically 5Ω, minimizing propagation delay. It supports rail-to-rail switching on data I/O ports and operates from a single supply voltage between 2.3V and 3.6V.

The bus switch is organized as dual 10-bit switches, each with a separate output enable (OE) input. This configuration allows it to function as two independent 10-bit bus switches or a single 20-bit bus switch. When the OE input is low, the switch is active, connecting port A to port B. When OE is high, the switch is open, and port B is precharged to a user-selectable bias voltage (BIASV) to reduce signal distortion during live insertion.

This device is specified for partial power-down applications using the Ioff feature, ensuring no damaging current backflow when powered down. It provides isolation during power-off conditions. The SN74CBTLV16800GR is housed in a 48-TSSOP surface-mount package and operates over an industrial temperature range of -40°C to 85°C.

Key electrical characteristics include a bandwidth of 200 MHz, a maximum off-state leakage current of 1µA, and a typical on-state resistance of 5Ω. The device also meets stringent ESD protection standards, exceeding 2000V for the human-body model (A114-A) and 200V for the machine model (A115-A). Latch-up performance exceeds 100 mA per JESD 78, Class II.