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SN74CB3Q16244

ACTIVE

10-pF on-state capacitance, 5-V, 1:1 (SPST), 16-channel FET bus switch with 4 control inputs

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Data sheet

SN74CB3Q16244

ACTIVE
Data sheet Order now

Product details

Configuration 1:1 SPST Number of channels 16 Power supply voltage - single (V) 2.5, 3.3 Protocols Analog Ron (typ) (Ω) 5 CON (typ) (pF) 10 Supply current (typ) (µA) 1000 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 Drain supply voltage (max) (V) 3.6 Supply voltage (max) (V) 3.6
Configuration 1:1 SPST Number of channels 16 Power supply voltage - single (V) 2.5, 3.3 Protocols Analog Ron (typ) (Ω) 5 CON (typ) (pF) 10 Supply current (typ) (µA) 1000 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 Drain supply voltage (max) (V) 3.6 Supply voltage (max) (V) 3.6
SSOP (DL) 48 164.358 mm² 15.88 x 10.35 TSSOP (DGG) 48 101.25 mm² 12.5 x 8.1 TVSOP (DGV) 48 62.08 mm² 9.7 x 6.4
  • 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= 5 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) = 4 pF Typical)
  • Fast Switching Frequency (fOE = 20 MHz
    Maximum)
  • Data and Control Inputs Provide Undershoot
    Clamp Diodes
  • Low Power Consumption (ICC = 1 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 and 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
  • 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= 5 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) = 4 pF Typical)
  • Fast Switching Frequency (fOE = 20 MHz
    Maximum)
  • Data and Control Inputs Provide Undershoot
    Clamp Diodes
  • Low Power Consumption (ICC = 1 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 and 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

The SN74CB3Q16244 device is a high-bandwidth FET bus switch using a charge pump to elevate the gate voltage of the pass transistor, 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 SN74CB3Q16244 device also features low data I/O capacitance to minimize capacitive loading and signal distortion on the data bus. Specifically designed to support high-bandwidth applications, the SN74CB3Q16244 device provides an optimized interface solution ideally suited for broadband communications, networking, and data-intensive computing systems.

The SN74CB3Q16244 device is organized as four 4-bit bus switches with separate output-enable (1OE, 2OE, 3OE, 4OE) inputs. It can be used as four 4-bit bus switches, two 8-bit bus switches, or one 16-bit bus switch. When OE is low, the associated 4-bit bus switch is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE is high, the associated 4-bit bus switch is OFF, and a high-impedance state exists between the A and B ports.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry prevents damaging current backflow through the device when it is powered down. The device has isolation during power off.

To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

The SN74CB3Q16244 device is a high-bandwidth FET bus switch using a charge pump to elevate the gate voltage of the pass transistor, 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 SN74CB3Q16244 device also features low data I/O capacitance to minimize capacitive loading and signal distortion on the data bus. Specifically designed to support high-bandwidth applications, the SN74CB3Q16244 device provides an optimized interface solution ideally suited for broadband communications, networking, and data-intensive computing systems.

The SN74CB3Q16244 device is organized as four 4-bit bus switches with separate output-enable (1OE, 2OE, 3OE, 4OE) inputs. It can be used as four 4-bit bus switches, two 8-bit bus switches, or one 16-bit bus switch. When OE is low, the associated 4-bit bus switch is ON, and the A port is connected to the B port, allowing bidirectional data flow between ports. When OE is high, the associated 4-bit bus switch is OFF, and a high-impedance state exists between the A and B ports.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry prevents damaging current backflow through the device when it is powered down. The device has isolation during power off.

To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
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Technical documentation

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Type Title Date
* Data sheet SN74CB3Q16244 16-Bit FET Bus Switch 2.5-V – 3.3-V Low-Voltage High-Bandwidth Bus Switch datasheet (Rev. A) PDF | HTML 18 Sep 2015
Application note Selecting the Correct Texas Instruments Signal Switch (Rev. E) PDF | HTML 02 Jun 2022
Application note Multiplexers and Signal Switches Glossary (Rev. B) PDF | HTML 01 Dec 2021
Application note CBT-C, CB3T, and CB3Q Signal-Switch Families (Rev. C) PDF | HTML 19 Nov 2021
Application brief Eliminate Power Sequencing with Powered-off Protection Signal Switches (Rev. C) PDF | HTML 06 Jan 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
Application note Bus FET Switch Solutions for Live Insertion Applications 07 Feb 2003

Design & development

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Simulation model

SN74CB3Q16244 IBIS Model

SCDM075.ZIP (25 KB) - IBIS Model
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Package Pins CAD symbols, footprints & 3D models
SSOP (DL) 48 Ultra Librarian
TSSOP (DGG) 48 Ultra Librarian
TVSOP (DGV) 48 Ultra Librarian
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