1. General description
The 74CB3Q3257-Q100 is a quad high-bandwidth single-pole, double-throw FET bus switch. The
device features one select input (S) and one output enable input (OE). The switch is disabled when
the OE 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.
This product has been qualified to the Automotive Electronics Council (AEC) standard Q100
(Grade 3) and is suitable for use in automotive applications.

2. Features and benefits
• Automotive product qualification in accordance with AEC-Q100 (Grade 3)
• Specified from -40 °C to +85 °C
• 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
• 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:
• MIL-STD-883, method 3015 exceeds 2000 V
• HBM ANSI/ESDA/Jedec JS-001 Class 2 exceeds 2 kV

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