SN74CB3Q3305PW Part Information

Details for SN74CB3Q3305PW by Texas Instruments

Semiconductors - ICs > Logic > Bus Switches

Part 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.

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Part Features

  • 5-V Tolerant I/Os With Device Powered Up or Powered Down
  • Bidirectional Data Flow With Near-Zero Propagation Delay
  • Control Inputs Can Be Driven by TTL or 5-V/3.3-V CMOS Outputs
  • 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)
  • Data and Control Inputs Provide Undershoot Clamp Diodes
  • Fast Switching Frequency (fOE = 20 MHz Maximum)
  • High-Bandwidth Data Path (Up to 500 MHz(1) )
  • Ioff Supports Partial-Power-Down Mode Operation
  • Latch-Up Performance Exceeds 100 mA Per
  • Low Input/Output Capacitance Minimizes Loading and Signal Distortion (Cio(OFF) = 3.5 pF Typical)
  • Low Power Consumption (ICC= 0.25 mA Typical)
  • Low and Flat ON-State Resistance (ron) Characteristics Over Operating Range (ron = 3 u2126 Typical)
  • Rail-to-Rail Switching on Data I/O Ports u2013 0- to 5-V Switching With 3.3-V VCC u2013 0- to 3.3-V Switching With 2.5-V VCC
  • VCC Operating Range From 2.3 V to 3.6 V

Part Specifications

No. of Channels 2Channels
Output Current 30mA
Switch Type SPST
On State Resistance Max -
Logic Case Style TSSOP
No. of Pins 8Pins
Supply Voltage Min 2.3V
Supply Voltage Max 3.6V
Product Range -
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (27-Jun-2018)
Bandwidth 500MHz
Logic Function Number 7433305
Logic IC Base Number 743305
Logic IC Function Dual FET Bus Switch 2.5V / 3.3V Low Voltage High Bandwidth
On Resistance Rds(on) 3ohm
Operating Temperature Max 85°C
Operating Temperature Min -40°C
Operating Temperature Range -40°C to +85°C
Supply Voltage Range 2.3V to 3.6V
Termination Type Surface Mount Device
Turn Off Time 5ns
Turn On Time 4.5ns
RoHS Compliant

Alternative Part Descriptions

  • IC, 74CB, BUS SWITCH, TSSOP8; No. of Channels:2Channels; Output Current:30mA; Switch Type:SPST; On State Resistance Max:-; Logic Case Style:TSSOP; No. of Pins:8Pins; Supply Voltage Min:2.3V; Supply Voltage Max:3.6V; Product Range:-; RoHS Compliant: Yes | Newark Electronics
  • 3.3-V, 1:1 (SPST), 2-channel FET bus switch (active high) | Texas Instruments

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