4-bit 1-of-2 FET multiplexer/demultiplexer with charge pump

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 RON and RON(flat) performance and the ability to switch 5 V signals when VCC = 3.3 V.

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
74CB3Q3257PW 74CB3Q3257PWJ 935339459118 SOT403-1 Order product

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

  • 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 1 kV

  • Specified from -40 °C to +85 °C


  • Communication infrastructure

  • Bus isolation

  • Memory interleaving

  • Sensor multiplexing


Type numberProduct statusVCC (V)VPASS (V)Logic switching levelsRON (Ω)f(-3dB) (MHz)Nr of bitstpd (ns)Power dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74CB3Q3257PWProduction2.3 - 3.6VccCMOS/LVTTL4-40.2very low-40~851162.444.3TSSOP16

(-) dash denotes: "Parameter value not specified for this product"

PCB Symbol, Footprint and 3D Model

Model NameDescription


Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackagePackage informationReflow-/Wave solderingPacking
( 9353 394 59118 )

Environmental information

Type numberOrderable part numberChemical contentRoHSRHF-indicator
Quality and reliability disclaimer

Documentation (6)

File nameTitleTypeDate
74CB3Q32574-bit 1-of-2 FET multiplexer/demultiplexer with charge pumpData sheet2017-08-23
cb3q3257IBIS model of 74CB3Q3257IBIS model2017-08-24
Nexperia_document_leaflet_CB3Q_switches_201803CB3Q Bus SwitchesLeaflet2018-04-06
74CB3Q3257PW_Nexperia_Product_Reliability74CB3Q3257PW Nexperia Product ReliabilityQuality document2023-05-29
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SOT403-1_118TSSOP16; Reel pack for SMD, 13"; Q1/T1 product orientationPacking information2020-02-14


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File nameTitleTypeDate
cb3q3257IBIS model of 74CB3Q3257IBIS model2017-08-24

PCB Symbol, Footprint and 3D Model

Model NameDescription

Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingPacking quantityBuy online
74CB3Q3257PW74CB3Q3257PWJ935339459118SOT403-1_118- Order product


As a Nexperia customer you can order samples via our sales organization or directly via our Online Sample Store: https://extranet.nexperia.com.

Sample orders normally take 2-4 days for delivery.

If you do not have a direct account with Nexperia our network of global and regional distributors is available and equipped to support you with Nexperia samples.

How does it work?

The interactive datasheets are based on the Nexperia MOSFET precision electrothermal models. With our interactive datasheets you can simply specify your own conditions interactively. Start by changing the values of the conditions. You can do this by using the sliders in the condition fields. By dragging the sliders you will see how the MOSFET will perform at the new conditions set.