Bus Switch 4-Element CMOS 4-IN 16-Pin SSOP T/R

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.

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 (r_on)
Characteristics Over Operating Range
(r_on = 3 O Typ)

Rail-to-Rail Switching on Data I/O Ports

• 0-V to 5-V Switching With 3.3-V V_CC
• 0-V to 3.3-V Switching With 2.5-V V_CC

Bidirectional Data Flow With Near-Zero
Propagation Delay

Low Input and Output Capacitance Minimizes
Loading and Signal Distortion
(C_io(OFF) = 4 pF Typ)

Fast Switching Frequency (f_OE\> = 20 MHz Max)

Data and Control Inputs Provide Undershoot
Clamp Diodes

Low Power Consumption
(I_CC = 0.3 mA Typ)

V_CC 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

I_off 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