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SN74AVCH20T245

ACTIVO

Transceptor de bus de alimentación doble de 20 bits con traducción de tensión configurable y salidas

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SN74AVCH20T245

ACTIVO
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Detalles del producto

Bits (#) 20 Data rate (max) (Mbps) 380 Topology Push-Pull Vin (min) (V) 1.2 Vin (max) (V) 3.6 Vout (min) (V) 1.2 Vout (max) (V) 3.6 Applications GPIO, JTAG, SPI, UART Features Bus-hold, Overvoltage tolerant inputs, Partial power down (Ioff) Prop delay (ns) 5 Technology family AVC Supply current (max) (mA) 0.065 Rating Catalog Operating temperature range (°C) -40 to 85
Bits (#) 20 Data rate (max) (Mbps) 380 Topology Push-Pull Vin (min) (V) 1.2 Vin (max) (V) 3.6 Vout (min) (V) 1.2 Vout (max) (V) 3.6 Applications GPIO, JTAG, SPI, UART Features Bus-hold, Overvoltage tolerant inputs, Partial power down (Ioff) Prop delay (ns) 5 Technology family AVC Supply current (max) (mA) 0.065 Rating Catalog Operating temperature range (°C) -40 to 85
TVSOP (DGV) 56 72.32 mm² (11.3 mm × 6.4 mm) TSSOP (DGG) 56 113.4 mm² (14 mm × 8.1 mm)
  • Control Inputs VIH/VIL Levels are Referenced to VCCA Voltage
  • VCC Isolation Feature - If Either VCC Input Is at GND, Both Ports Are in the High-Impedance State
  • Overvoltage-Tolerant Inputs/Outputs Allow Mixed-Voltage-Mode Data Communications
  • Fully Configurable Dual-Rail Design Allows Each Port to Operate Over the Full 1.2-V to 3.6-V Power-Supply Range
  • Ioff Supports Partial-Power-Down Mode Operation
  • I/Os Are 4.6-V Tolerant
  • Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
  • Max Data Rates
    • 380 Mbps (1.8-V to 3.3-V Translation)
    • 260 Mbps (1.8-V to 3.3-V Translation)
    • 260 Mbps (Translate to 2.5 V)
    • 210 Mbps (Translate to 1.8 V)
    • 120 Mbps (Translate to 1.5 V)
    • 100 Mbps (Translate to 1.2 V)
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 8000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)
  • Control Inputs VIH/VIL Levels are Referenced to VCCA Voltage
  • VCC Isolation Feature - If Either VCC Input Is at GND, Both Ports Are in the High-Impedance State
  • Overvoltage-Tolerant Inputs/Outputs Allow Mixed-Voltage-Mode Data Communications
  • Fully Configurable Dual-Rail Design Allows Each Port to Operate Over the Full 1.2-V to 3.6-V Power-Supply Range
  • Ioff Supports Partial-Power-Down Mode Operation
  • I/Os Are 4.6-V Tolerant
  • Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
  • Max Data Rates
    • 380 Mbps (1.8-V to 3.3-V Translation)
    • 260 Mbps (1.8-V to 3.3-V Translation)
    • 260 Mbps (Translate to 2.5 V)
    • 210 Mbps (Translate to 1.8 V)
    • 120 Mbps (Translate to 1.5 V)
    • 100 Mbps (Translate to 1.2 V)
  • Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
  • ESD Protection Exceeds JESD 22
    • 8000-V Human-Body Model (A114-A)
    • 200-V Machine Model (A115-A)
    • 1000-V Charged-Device Model (C101)

This 20-bit noninverting bus transceiver uses two separate configurable power-supply rails. The SN74AVCH20T245 is optimized to operate with VCCA/VCCB set at 1.4 V to 3.6 V. It is operational with VCCA/VCCB as low as 1.2 V. The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.2 V to 3.6 V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.2 V to 3.6 V. This allows for universal low-voltage bidirectional translation between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage nodes.

The SN74AVCH20T245 is designed for asynchronous communication between data buses. The device transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE)\ input can be used to disable the outputs so that the buses are effectively isolated.

The SN74AVCH20T245 is designed so that the control (1DIR, 2DIR, 1OE\, and 2OE\) inputs are supplied by VCCA.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

The VCC isolation feature ensures that if either VCC input is at GND, both outputs are in the high-impedance state. The bus-hold circuitry on the powered-up side always stays active.

Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended.

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.

This 20-bit noninverting bus transceiver uses two separate configurable power-supply rails. The SN74AVCH20T245 is optimized to operate with VCCA/VCCB set at 1.4 V to 3.6 V. It is operational with VCCA/VCCB as low as 1.2 V. The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.2 V to 3.6 V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.2 V to 3.6 V. This allows for universal low-voltage bidirectional translation between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage nodes.

The SN74AVCH20T245 is designed for asynchronous communication between data buses. The device transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE)\ input can be used to disable the outputs so that the buses are effectively isolated.

The SN74AVCH20T245 is designed so that the control (1DIR, 2DIR, 1OE\, and 2OE\) inputs are supplied by VCCA.

This device is fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

The VCC isolation feature ensures that if either VCC input is at GND, both outputs are in the high-impedance state. The bus-hold circuitry on the powered-up side always stays active.

Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended.

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 técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos SN74AVCH20T245 datasheet (Rev. F) 19/04/2005
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Diseño y desarrollo

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Modelo de simulación

SN74AVCH20T245 IBIS Model (Rev. A)

SCEM432 (401 KB) - Modelo IBIS
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