SN74CB3T3125PW

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SN74CB3T3125PW

3.3-V Low-Voltage Quadruple FET Bus Switch with 5-V Tolerant Level Shifter

Packaging

Package | PIN: PW | 14
Temp: I (-40 to 85)
Carrier: Partial Tube
Qty Price
1-9 $1.88
10-24 $1.69
25-99 $1.57
100-249 $1.37
250-499 $1.26
500-749 $1.06
750-999 $0.87
1000+ $0.80

Features

  • Output Voltage Translation Tracks VCC
  • Supports Mixed-Mode Signal Operation On All Data I/O Ports
    • 5-V Input Down to 3.3-V Output-Level Shift With 3.3-V
      VCC
    • 5-V/3.3-V Input Down to 2.5-V Output-Level Shift With 2.5-V VCC
  • 5-V-Tolerant I/Os With Device Powered Up or Powered Down
  • Bidirectional Data Flow, With Near-Zero Propagation Delay
  • Low ON-State Resistance (ron) Characteristics
    ron = 5 Ω Typ)
  • Low Input/Output Capacitance Minimizes Loading (Cio(OFF) = 4.5 pF Typ)
  • Data and Control Inputs Provide Undershoot Clamp Diodes
  • Low Power Consumption (ICC = 20 µA Max)
  • 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 250 mA Per JESD 17
  • ESD Performance Tested Per JESD 22
    • 2000-V Human-Body Model
      (A114-B, Class II)
    • 1000-V Charged-Device Model (C101)
  • Supports Digital Applications: Level Translation, USB Interface,
    Bus Isolation
  • Ideal for Low-Power Portable Equipment

Texas Instruments  SN74CB3T3125PW

The SN74CB3T3125 is a high-speed TTL-compatible FET bus switch with low ON-state resistance (ron), allowing for minimal propagation delay. The device fully supports mixed-mode signal operation on all data I/O ports by providing voltage translation that tracks VCC. The SN74CB3T3125 supports systems using 5-V TTL, 3.3-V LVTTL, and 2.5-V CMOS switching standards, as well as user-defined switching levels (see ).

The SN74CB3T3125 is organized as four 1-bit bus switches with separate output-enable (1OE, 2OE, 3OE, 4OE) inputs. It can be used as four 1-bit bus switches or as one 4-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 the high-impedance state exists between the A and B ports.

This device is fully specified for partial-power-down applications using Ioff. The Ioff feature ensures that damaging current will not 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.