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Protocolo e interruptores de bus y multiplexores

SN74CBT3245C

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Interruptor de bus FET de 5 V, 1:1 (SPST) y 8 canales con protección contra subdisparo de –2 V y 1 e

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SN74CBT3245C

ACTIVO
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Detalles del producto

Protocols Analog Configuration 1:1 SPST Number of channels 8 Bandwidth (MHz) 200 Ron (typ) (mΩ) 3000 Input/output voltage (min) (V) 0 Input/output voltage (max) (V) 5.5 Operating temperature range (°C) -40 to 85 ESD CDM (kV) 1 Input/output continuous current (max) (mA) 128 COFF (typ) (pF) 5.5 CON (typ) (pF) 14 OFF-state leakage current (max) (µA) 10 Ron (max) (mΩ) 12000 VIH (min) (V) 2 VIL (max) (V) 0.8 Rating Catalog
Protocols Analog Configuration 1:1 SPST Number of channels 8 Bandwidth (MHz) 200 Ron (typ) (mΩ) 3000 Input/output voltage (min) (V) 0 Input/output voltage (max) (V) 5.5 Operating temperature range (°C) -40 to 85 ESD CDM (kV) 1 Input/output continuous current (max) (mA) 128 COFF (typ) (pF) 5.5 CON (typ) (pF) 14 OFF-state leakage current (max) (µA) 10 Ron (max) (mΩ) 12000 VIH (min) (V) 2 VIL (max) (V) 0.8 Rating Catalog
SOIC (DW) 20 131.84 mm² (12.8 mm × 10.3 mm) SSOP (DB) 20 56.16 mm² (7.2 mm × 7.8 mm) VQFN (RGY) 20 15.75 mm² (4.5 mm × 3.5 mm) TSSOP (PW) 20 41.6 mm² (6.5 mm × 6.4 mm) TVSOP (DGV) 20 32 mm² (5 mm × 6.4 mm) SSOP (DBQ) 20 51.9 mm² (8.65 mm × 6 mm)
  • 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, Memory Interleaving, Bus Isolation, Low-Distortion Signal Gating
  • 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, Memory Interleaving, Bus Isolation, Low-Distortion Signal Gating

The SN74CBT3245C 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 SN74CBT3245C 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 SN74CBT3245C is organized as an 8-bit bus switch with a single output-enable (OE)\ input. When OE\ is low, the 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 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.

The SN74CBT3245C 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 SN74CBT3245C 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 SN74CBT3245C is organized as an 8-bit bus switch with a single output-enable (OE)\ input. When OE\ is low, the 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 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.
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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos SN74CBT3245C datasheet (Rev. A) 15/10/2003
Nota sobre la aplicación Selecting the Correct Texas Instruments Signal Switch (Rev. E) PDF | HTML 2/06/2022
Nota sobre la aplicación Multiplexers and Signal Switches Glossary (Rev. B) PDF | HTML 1/12/2021
Application brief Eliminate Power Sequencing with Powered-off Protection Signal Switches (Rev. C) PDF | HTML 6/01/2021

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Modelo de simulación

HSPICE MODEL OF SN74CBT3245C

SCEJ202.ZIP (100 KB) - Modelo HSpice
Productos y hardware compatibles
Modelo de simulación

SN74CBT3245C IBIS Model

SCDM047.ZIP (27 KB) - Modelo IBIS
Productos y hardware compatibles
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
SOIC (DW) 20 Ultra Librarian
SSOP (DB) 20 Ultra Librarian
VQFN (RGY) 20 Ultra Librarian
TSSOP (PW) 20 Ultra Librarian
TVSOP (DGV) 20 Ultra Librarian
SSOP (DBQ) 20 Ultra Librarian
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