SN74CBT3125C Quadruple FET Bus Switch with -2 V Undershoot-Protection | TI.com

SN74CBT3125C (ACTIVE) Quadruple FET Bus Switch with -2 V Undershoot-Protection

Quadruple FET Bus Switch with -2 V Undershoot-Protection - SN74CBT3125C
Datasheet
 

Description

The SN74CBT3125C is a high-speed TTL-compatible FET bus switch with low ON-state resistance (ron), allowing for minimal propagation delay. Active Undershoot-Protection Circuitry on the A and B ports of the SN74CBT3125C provides protection for undershoot up to –2 V by sensing an undershoot event and ensuring that the switch remains in the proper OFF state.

The SN74CBT3125C 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.

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.

Features

  • Undershoot Protection for Off-Isolation on A and B Ports Up To –2 V
  • Bidirectional Data Flow, With Near-Zero Propagation Delay
  • Low On-State Resistance (ron) Characteristics
          (ron = 3 Typical)
  • Low Input/Output Capacitance Minimizes Loading and Signal Distortion
         (Cio(OFF) = 5 pF Typical)
  • Data and Control Inputs Provide Undershoot Clamp Diodes
  • Low Power Consumption
         (ICC = 3 µA Max)
  • VCC Operating Range From 4 V to 5.5 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
  • 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, Bus Isolation, Low-Distortion Signal Gating

Parametrics

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Part number Order Configuration Number of channels (#) Ron (Typ) (Ohms) Bandwidth (MHz) Power supply type Vdd (Min) (V) Vdd (Max) (V) Rating Operating temperature range (C) Package Group Supply range (Max) Ron (Max) (Ohms) Input/output continuous current (Max) (mA) Supply current (Max) (uA) Features OFF-state leakage current (Max) (µA) ON-state leakage current (Max) (µA) CON (Typ) (pF) COFF (Typ) (pF) ESD CDM (kV) ESD HBM (kV) VIL (Max) (V) VIH (Min) (V)
SN74CBT3125C Order now 1:1 SPST     4     3     200     Single     4     5.5     Catalog     -40 to 85     SOIC | 14
SSOP | 14
SSOP | 16
TSSOP | 14
VQFN | 14    
5.5     12     128     3     Powered-off protection
Undershoot protection
Supports SPI signals
Supports JTAG signals    
10     10     12.5     5     1     2     0.8     2