Dual FET Bus Switch 2.5-V/3.3-V Low-Voltage, High-Bandwidth - SN74CB3Q3305

SN74CB3Q3305 (ACTIVE)

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

 

Description

The SN74CB3Q3305 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 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 SN74CB3Q3305 device provides an optimized interface solution ideally suited for broadband communications, networking, and data-intensive computing systems.

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 GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sourcing 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 = 3 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/Output Capacitance Minimizes Loading
    and Signal Distortion
    (Cio(OFF) = 3.5 pF Typical)
  • Fast Switching Frequency (fOE = 20 MHz
    Maximum)
  • Data and Control Inputs Provide Undershoot
    Clamp Diodes
  • Low Power Consumption (ICC= 0.25 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
  • APPLICATIONS
    • IP Phones: Wired and Wireless
    • Optical Modules
    • Optical Networking: Video Over Fiber and EPON
    • Private Branch Exchange (PBX)
    • WiMAX and Wireless Infrastructure Equipment
    • USB, Differential Signal interface
    • Bus isolation

(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.
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Parametrics Compare all products in Analog Switches/Muxes

 
Configuration
Number of Channels (#)
Power Supply Type
Vss (Min) (V)
Vss (Max) (V)
Vdd (Min) (V)
Vdd (Max) (V)
Ron (Typ) (Ohms)
Bandwidth (MHz)
Rating
Operating Temperature Range (C)
Package Size: mm2:W x L (PKG)
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)
Input/Output ON-state Capacitance (Typ) (pF)
Input/Output OFF-state Capacitance (Typ) (pF)
ESD Charged Device Model (kV)
ESD HBM (kV)
VIL (Max) (V)
VIH (Min) (V)
SN74CB3Q3305
1:1 SPST   
2   
Single   
N/A   
N/A   
2.3   
3.6   
3   
500   
Catalog   
-40 to 85   
8TSSOP: 19 mm2: 6.4 x 3(TSSOP)
8VSSOP: 6 mm2: 3.1 x 2(VSSOP)   
TSSOP
VSSOP   
3.6   
9   
64   
250   
700   
Powered off protection   
1   
8   
3.5   
1   
2   
0.8   
1.7   

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