General description
The 74CB3Q3253 is a dual high-bandwidth single-pole, quad-throw FET bus switch.
Each switch features a select input (Sn) and an output enable input (nOE). The switch
is disabled when the nOE input is HIGH. An internal charge-pump increases the
gate voltage of the NMOS pass transistor. The result is improved RON and RON(flat)
performance and the ability to switch 5 V signals when VCC = 3.3 V.

Features and benefits
• Wide supply voltage range from 2.3 V to 3.6 V
• Overvoltage switching on switch ports:
– 0 V to 5 V switching with VCC = 2.5 V
– 0 V to 5 V switching with VCC = 3.3 V
• Switch voltage accepts signals up to 5.5 V
• 4 Ω (typical) ON resistance
• 3.5 pF (typical) OFF-state capacitance
• High bandwidth 0.5 GHz (maximum)
• Low input/output capacitance minimizes loading and signal distortion
• Fast switching frequency fmax = 20 MHz (maximum)
• Low power consumption ICC = 0.4 mA (typical)
• Control inputs can be driven by TTL or 5 V/3.3 V CMOS outputs
• IOFF supports partial power-down mode operation
• Latch-up performance exceeds 100 mA per JESD 78E Class II Level A
• ESD protection:
– HBM ANSI/ESDA/JEDEC JS-001-2012 Class 2 exceeds 2 kV
– CDM JESD22-C101F exceeds 1000 V
• Specified from -40 °C to +85 °C

Applications
• Communication infrastructure
• Bus isolation
• Memory interleaving
• Sensor multiplexing