74CB3Q3257
4-bit 1-of-2 FET multiplexer/demultiplexer with charge pump
Rev. 1 — 14 August 2017 Product data sheet
1 General description
The 74CB3Q3257 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 R
ON
and R
ON(flat)
performance and
the ability to switch 5 V signals when V
CC
= 3.3 V.
2 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 V
CC
= 2.5 V
– 0 V to 5 V switching with V
CC
= 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 f
max
= 20 MHz (maximum)
• Low power consumption I
CC
= 0.4 mA (typical)
• Control inputs can be driven by TTL or 5 V/3.3 V CMOS outputs
• I
OFF
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
3 Applications
• Communication infrastructure
• Bus isolation
• Memory interleaving
• Sensor multiplexing
