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3.3-V, 2:1 (SPDT), 4-channel FET bus switch

SN74CB3Q3125

ACTIVE

Product details

Parameters

Configuration 1:1 SPST Number of channels (#) 4 Ron (Typ) (Ohms) 4 ON-state leakage current (Max) (µA) 1 Bandwidth (MHz) 500 Operating temperature range (C) -40 to 85 Features Powered-off protection, Supports JTAG signals, Supports SPI signals, Supports input voltage beyond supply Input/output continuous current (Max) (mA) 64 Rating Catalog CON (Typ) (pF) 8 Supply current (Typ) (uA) 2000 open-in-new Find other Analog switches/muxes

Package | Pins | Size

SSOP (DBQ) 16 29 mm² 4.9 x 6 TSSOP (PW) 14 32 mm² 5 x 6.4 TVSOP (DGV) 14 23 mm² 3.6 x 6.4 VQFN (RGY) 14 12 mm² 3.5 x 3.5 open-in-new Find other Analog switches/muxes

Features

  • High-Bandwidth Data Path (up to 500 MHz(1))
  • 5-V Tolerant I/Os With Device Powered Up
    or Powered Down
  • Low and Flat ON-State Resistance (ron)
    Characteristics Over Operating Range
    (ron = 3 Ω Typ)
  • Rail-to-Rail Switching on Data I/O Ports
    • 0-V to 5-V Switching With 3.3-V VCC
    • 0-V to 3.3-V Switching With 2.5-V VCC
  • Bidirectional Data Flow With Near-Zero
    Propagation Delay
  • Low Input and Output Capacitance Minimizes
    Loading and Signal Distortion
    (Cio(OFF) = 4 pF Typ)
  • Fast Switching Frequency (fOE = 20 MHz Max)
  • Data and Control Inputs Provide Undershoot
    Clamp Diodes
  • Low Power Consumption
    (ICC = 0.3 mA Typ)
  • VCC Operating Range From 2.3 V to 3.6 V
  • Data I/Os Support 0-V to 5-V Signaling Levels
    (0.8 V, 1.2 V, 1.5 V, 1.8 V, 2.5 V, 3.3 V, 5 V)
  • Control Inputs Can Be Driven by TTL,
    5-V, or 3.3-V CMOS Outputs
  • Ioff Supports Partial-Power-Down Mode Operation
  • Latch-Up Performance Exceeds 100 mA Per
    JESD 78, Class II
  • ESD Performance Tested Per JESD 22
    • 2000-V Human-Body Model
      (A114-B, Class II)
    • 1000-V Charged-Device Model (C101)
  • Supports Both Digital and Analog Applications:
    USB Interface, Differential Signal Interface, Bus
    Isolation, Low-Distortion Signal Gating
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Description

The SN74CB3Q3125 device is a high-bandwidth FET bus switch that uses a charge pump to elevate the gate voltage of the pass transistor, thus providing a low and flat ON-state resistance (ron). The low and flat ON-state resistance allows for minimal propagation delay and supports rail-to-rail switching on the data input/output (I/O) ports. The SN74CB3Q3125 device also features low data I/O capacitance to minimize capacitive loading and signal distortion on the data bus.

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Exact equivalent in functionality and parametrics to the compared device:
TMUX1511 ACTIVE 5-V, 1:1 (SPST), 4-channel analog switch with powered-off protection & 1.8-V input logic Upgraded 3-GHz bandwidth, 2-Ω RON, and 1.8-V logic support

Technical documentation

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Type Title Date
* Datasheet SN74CB3Q3125 Quadruple FET Bus Switch 2.5-V/3.3-V Low-Voltage, High-Bandwidth Bus Switch datasheet (Rev. C) Jun. 29, 2015
Application notes Selecting the Right Texas Instruments Signal Switch (Rev. B) Apr. 02, 2020
Application notes Multiplexers and Signal Switches Glossary Mar. 06, 2020
Technical articles Roll with the design punches and overcome power-sequencing challenges Jul. 29, 2019
Application notes Eliminate power Sequencing with powered-off protection signal switches (Rev. B) Jan. 15, 2019
Technical articles Is charge injection causing output voltage errors in your industrial control system? Oct. 18, 2018
Selection guides Logic Guide (Rev. AB) Jun. 12, 2017
Technical articles Logic gates and switches with Ioff – empowering you to power down Nov. 02, 2016
Application notes Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) Dec. 02, 2015
Technical articles The wheels on the (digital) bus go round and round Sep. 30, 2015
Solution guides LOGIC Pocket Data Book (Rev. B) Jan. 16, 2007
More literature Digital Bus Switch Selection Guide (Rev. A) Nov. 10, 2004
Application notes Semiconductor Packing Material Electrostatic Discharge (ESD) Protection Jul. 08, 2004
User guides Signal Switch Data Book (Rev. A) Nov. 14, 2003
More literature Logic Cross-Reference (Rev. A) Oct. 07, 2003
Application notes Bus FET Switch Solutions for Live Insertion Applications Feb. 07, 2003
Application notes CBT-C, CB3T, and CB3Q Signal-Switch Families Feb. 04, 2003

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

INTERFACE ADAPTERS Download
document-generic User guide
$10.00
Description

The EVM-LEADED1 board allows for quick testing and bread boarding of TI's common leaded packages.  The board has footprints to convert TI's D, DBQ, DCT,DCU, DDF, DGS, DGV, and PW surface mount packages to 100mil DIP headers.     

Features
  • Quick testing of TI's leaded surface mount packages 
  • Allows leaded suface mount packages to be plugged into 100mil spaced bread board 
  • Supports TI's 8 most popular leaded packages with a single panel


Design tools & simulation

SIMULATION MODELS Download
SCDM067A.ZIP (25 KB) - IBIS Model
SIMULATION MODELS Download
SCEJ199.ZIP (93 KB) - HSpice Model

Reference designs

REFERENCE DESIGNS Download
Power Supply with Programmable Output Voltage and Protection for Position Encoder Interfaces
TIDA-00180 This TI Design implements a universal power supply with programmable output voltage and innovative smart e-Fuse technology for use in a multi-standard position encoder interface module on an industrial drive. The eFuse provides inrush-current and over-current protection as well as user programmable (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SSOP (DBQ) 16 View options
TSSOP (PW) 14 View options
TVSOP (DGV) 14 View options
VQFN (RGY) 14 View options

Ordering & quality

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