• High-Bandwidth Data Path (up to 500 MHz(1)(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 Typ)
• Rail-to-Rail Switching on Data I/O Ports
  • 0-V to 5-V Switching With 3.3-V VCC
  • 0-V 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 Typ)
• Fast Switching Frequency (fOE = 20 MHz Max)
• Data and Control Inputs Provide Undershoot Clamp Diodes
• Low Power Consumption (ICC = 0.3 mA Typ)
• VCC Operating Range From 2.3 V to 3.6 V
• Data I/Os Support 0-V 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, 5-V, or 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).

• IP Phones: Wired and Wireless
• Optical Modules
• Optical Networking: Video Over Fiber and EPON
• Private Branch Exchange (PBX)
• WiMAX and Wireless Infrastructure Equipment

The SN74CB3Q3125 device is a high-bandwidth FET bus switch that uses a charge pump to elevate the gate voltage of the pass transistor, thus 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 SN74CB3Q3125 device also features low data I/O capacitance to minimize capacitive loading and signal distortion on the data bus.

PART NUMBER	PACKAGE	BODY SIZE (NOM)
SN74CB3Q3125	VQFN (14)	3.50 mm × 3.50 mm
	SSOP (16)	4.90 mm × 3.90 mm
	TSSOP (16)	5.00 mm × 4.40 mm
	TVSOP (16)	4.40 mm × 3.60 mm

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