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

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Parametrics Compare all products in Analog switches/muxes

 
Configuration
Number of channels (#)
Power supply type
Vss (Min) (V)
Vss (Max) (V)
Vdd (Min) (V)
Vdd (Max) (V)
Ron (Typ) (Ohms)
Bandwidth (MHz)
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
1:1 SPST    
4    
Single    
   
   
4    
5.5    
3    
200    
Catalog    
-40 to 85    
SOIC | 14
SSOP | 14
SSOP | 16
TSSOP | 14
VQFN | 14    
5.5    
12    
128    
3    
Powered-off protection
2-V undershoot protection
Supports SPI signals
Supports JTAG signals    
10    
10    
12.5    
5    
1    
2    
0.8    
2