SN74CB3Q3306A Dual FET 2.5-V/3.3-V Low-Voltage, High-Bandwidth Bus Switch | TI.com

SN74CB3Q3306A (ACTIVE)

Dual FET 2.5-V/3.3-V Low-Voltage, High-Bandwidth Bus Switch

Dual FET 2.5-V/3.3-V Low-Voltage, High-Bandwidth Bus Switch - SN74CB3Q3306A
Datasheet
 

Description

The SN74CB3Q3306A 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 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 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 SN74CB3Q3306A provides an optimized interface solution ideally suited for broadband communications, networking, and data-intensive computing systems.

The SN74CB3Q3306A is organized as two 1-bit switches with separate output-enable (1OE, 2OE) inputs. It can be used as two 1-bit bus switches or as one 2-bit bus switch. When OE is low, the associated 1-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 1-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.

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 = 4 Ω Typ)
  • 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/Output Capacitance Minimizes Loading and Signal Distortion
    (Cio(OFF) = 3.5 pF Typ)
  • Fast Switching Frequency (f OE = 20 MHz Max)
  • Data and Control Inputs Provide Undershoot Clamp Diodes
  • Low Power Consumption (ICC = 0.25 mA Typ)
  • 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) 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, literature number SCDA008.

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Parametrics Compare all products in Analog switches/muxes

 
Configuration
Number of channels (#)
Power supply type
Vdd (Min) (V)
Vdd (Max) (V)
Ron (Typ) (Ohms)
Bandwidth (MHz)
Rating
Operating temperature range (C)
Package Group
Supply Range (Max)
Ron (Max) (Ohms)
Input/output continuous current (Max) (mA)
Supply Current (Typ) (uA)
Supply Current (Max) (uA)
Features
OFF-state leakage current (Max) (µA)
ON-state leakage current (Max) (µA)
CON (Typ) (pF)
COFF (Typ) (pF)
ESD CDM (kV)
ESD HBM (kV)
VIL (Max) (V)
VIH (Min) (V)
SN74CB3Q3306A SN74CBT3306
1:1 SPST     1:1 SPST    
2     2    
Single     Single    
2.3     4    
3.6     5.5    
4     5    
500     200    
Catalog     Catalog    
-40 to 85     -40 to 85    
TSSOP | 8
VSSOP | 8    
SOIC | 8
TSSOP | 8    
3.6     5.5    
9     20    
64     128    
700      
2000     3    
Powered-off protection
Supports I2C signals
Supports input voltage beyond supply    
Supports I2C signals    
1     1    
  1    
8      
3.5     4    
1      
2      
0.8     0.8    
1.7     2