SN74CB3Q3257

ACTIVE

Product details

Configuration 2:1 SPDT Number of channels (#) 4 Power supply voltage - single (V) 2.5, 3.3 Protocols Analog, JTAG, UART, I2C, SPI, RGMII, TDM, I2S Ron (Typ) (Ohms) 4 CON (Typ) (pF) 10.5 Bandwidth (MHz) 500 Operating temperature range (C) -40 to 85 Features Powered-off protection, Supports input voltage beyond supply Input/output continuous current (Max) (mA) 64 Rating Catalog Supply current (Typ) (uA) 250
Configuration 2:1 SPDT Number of channels (#) 4 Power supply voltage - single (V) 2.5, 3.3 Protocols Analog, JTAG, UART, I2C, SPI, RGMII, TDM, I2S Ron (Typ) (Ohms) 4 CON (Typ) (pF) 10.5 Bandwidth (MHz) 500 Operating temperature range (C) -40 to 85 Features Powered-off protection, Supports input voltage beyond supply Input/output continuous current (Max) (mA) 64 Rating Catalog Supply current (Typ) (uA) 250
SSOP (DBQ) 16 29 mm² 4.9 x 6 TSSOP (PW) 16 22 mm² 4.4 x 5 TSSOP (PW) 16 22 mm² 5 x 4.4 TVSOP (DGV) 16 23 mm² 3.6 x 6.4 VQFN (RGY) 16 14 mm² 4 x 3.5
  • High-Bandwidth Data Path
    (up to 500 MHz)
  • 5-V Tolerant I/Os With Device Powered Up or Powered Down
  • Low and Flat ON-State Resistance (ron) Characteristics Over Operating Range
    (ron= 4 Ω Typical)
  • Rail-to-Rail Switching on Data I/O Ports
    • 0- to 5-V Switching With 3.3-V VCC
    • 0- 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) = 3.5 pF Typical)
  • Fast Switching Frequency (f OE = 20 MHz Maximum)
  • Data and Control Inputs Provide Undershoot Clamp Diodes
  • Low Power Consumption
    (ICC = 0.7 mA Typical)
  • VCC Operating Range From 2.3 V to 3.6 V
  • Data I/Os Support 0- 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 or
    5-V/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 (1)

(1)For additional information regarding the performance
characteristics of the CB3Q family, refer to the TI application report, CBT-C, CB3T, and CB3Q Signal-Switch Families, SCDA008.

  • High-Bandwidth Data Path
    (up to 500 MHz)
  • 5-V Tolerant I/Os With Device Powered Up or Powered Down
  • Low and Flat ON-State Resistance (ron) Characteristics Over Operating Range
    (ron= 4 Ω Typical)
  • Rail-to-Rail Switching on Data I/O Ports
    • 0- to 5-V Switching With 3.3-V VCC
    • 0- 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) = 3.5 pF Typical)
  • Fast Switching Frequency (f OE = 20 MHz Maximum)
  • Data and Control Inputs Provide Undershoot Clamp Diodes
  • Low Power Consumption
    (ICC = 0.7 mA Typical)
  • VCC Operating Range From 2.3 V to 3.6 V
  • Data I/Os Support 0- 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 or
    5-V/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 (1)

(1)For additional information regarding the performance
characteristics of the CB3Q family, refer to the TI application report, CBT-C, CB3T, and CB3Q Signal-Switch Families, SCDA008.

The SN74CB3Q3257 device is a high-bandwidth FET bus switch utilizing a charge pump to elevate the gate voltage of the pass transistor, providing a low and flat ON-state resistance (ron).

The SN74CB3Q3257 device is a high-bandwidth FET bus switch utilizing a charge pump to elevate the gate voltage of the pass transistor, providing a low and flat ON-state resistance (ron).

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Technical documentation

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Type Title Date
* Data sheet SN74CB3Q3257 4-Bit 1-of-2 FET Multiplexer/Demultiplexer 2.5-V/3.3-V Low-Voltage High-Bandwidth Bus Switch datasheet (Rev. D) 09 Jul 2018
Application note Selecting the Correct Texas Instruments Signal Switch (Rev. D) 09 Dec 2021
Application note Multiplexers and Signal Switches Glossary (Rev. B) 01 Dec 2021
Application note CBT-C, CB3T, and CB3Q Signal-Switch Families (Rev. C) 19 Nov 2021
Selection guide Logic Guide (Rev. AB) 12 Jun 2017
Application note Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) 02 Dec 2015
User guide LOGIC Pocket Data Book (Rev. B) 16 Jan 2007
More literature Digital Bus Switch Selection Guide (Rev. A) 10 Nov 2004
Application note Semiconductor Packing Material Electrostatic Discharge (ESD) Protection 08 Jul 2004
User guide Signal Switch Data Book (Rev. A) 14 Nov 2003
More literature Logic Cross-Reference (Rev. A) 07 Oct 2003
Application note Bus FET Switch Solutions for Live Insertion Applications 07 Feb 2003

Design & development

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

Evaluation board

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TAS2770EVM-STEREO — Stereo Evaluation Module of the TAS2770 Digital Input, Class-D, IV Sense Audio Amplifier

The TAS2770EVM-Stereo evaluation module provides developers with a simple to use module pre-configured in as a stereo solution. It is powerful tool kit for assessing stereo or mono implementations of the TAS2770 with or without IV sense. Everything needed for evaluating TAS2770 as a conventional (...)
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Interface adapter

LEADLESS-ADAPTER1 — Surface mount to DIP header adapter for testing of TI's 6,8,10,12,14,16, & 20-pin leadless packages

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Simulation model

HSPICE Model of SN74CB3Q3257

SCDJ024.ZIP (28 KB) - HSpice Model
Simulation model

SN74CB3Q3257 IBIS Model

SCDM049.ZIP (44 KB) - IBIS Model
Reference designs

TIDA-01572 — Stereo Evaluation Module Reference Design of the Digital Input, Class-D, IV Sense Audio Amplifier

This reference design provides a high-performance stereo audio subsystem for use in PC applications. It operates off a single supply, ranging from 4.5 V to 16 V, and features the TAS2770, a digital-input Class-D audio amplifier that provides excellent noise and distortion performance and is (...)
Package Pins Download
SSOP (DBQ) 16 View options
TSSOP (PW) 16 View options
TVSOP (DGV) 16 View options
VQFN (RGY) 16 View options

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