SN74CBT3384CDBQR

The SN74CBT3384CDBQR from Texas Instruments is a high-speed FET bus switch designed for TTL compatibility. It features a 5x1:1 circuit configuration with two independent 5-bit bus switches, allowing for bidirectional data flow with near-zero propagation delay.

Key electrical characteristics include a low ON-state resistance of typically 3 Ω and low input/output capacitance of typically 5 pF, minimizing signal distortion and loading. The device operates over a wide VCC range of 4 V to 5.5 V and supports various signaling levels from 0.8 V to 5 V. Control inputs can be driven by TTL or 5-V/3.3-V CMOS outputs.

This bus switch offers active undershoot protection on its A and B ports, capable of handling up to -2 V. It also features undershoot clamp diodes on data and control inputs. The SN74CBT3384CDBQR consumes low power, with a maximum ICC of 3 µA, and supports partial-power-down mode operation via the Ioff feature. Its latch-up performance exceeds 100 mA per JESD 78, Class II, and ESD performance is tested per JESD 22 standards.

The SN74CBT3384CDBQR is supplied in a 24-SSOP surface-mount package. Its versatile design makes it suitable for applications such as PCI interfaces, memory interleaving, bus isolation, and low-distortion signal gating.