SN74LVCH8T245

ACTIVO

Detalles del producto

Bits (#) 8 Data rate (max) (Mbps) 200 Topology Push-Pull Vout (min) (V) 1.65 Vout (max) (V) 5.5 Features Bus-hold, Output enable, Overvoltage tolerant inputs, Partial power down (Ioff), Vcc isolation Prop delay (ns) 6.5 Technology family LVC Supply current (max) (mA) 0.025 Rating Catalog Operating temperature range (°C) -40 to 85
Bits (#) 8 Data rate (max) (Mbps) 200 Topology Push-Pull Vout (min) (V) 1.65 Vout (max) (V) 5.5 Features Bus-hold, Output enable, Overvoltage tolerant inputs, Partial power down (Ioff), Vcc isolation Prop delay (ns) 6.5 Technology family LVC Supply current (max) (mA) 0.025 Rating Catalog Operating temperature range (°C) -40 to 85
SSOP (DB) 24 63.96 mm² (8.2 mm × 7.8 mm) VQFN (RHL) 24 19.25 mm² (5.5 mm × 3.5 mm) TVSOP (DGV) 24 32 mm² (5 mm × 6.4 mm) TSSOP (PW) 24 49.92 mm² (7.8 mm × 6.4 mm)
  • Fully configurable dual-rail design
  • Robust, glitch-free power supply sequencing
  • Control inputs (DIR and OE) VIH and VIL levels are referenced to VCCA
  • Bus hold on data inputs eliminates the need for external pullup and pulldown resistors
  • VCC isolation feature and VCC disconnect feature
    • if either VCC input is below 100mV or left floating, all I/O outputs are disabled and become high- impedance state
  • Ioff supports Partial-Power-Down node operation
  • Latch-up performance exceeds 100mA per JESD 78, class II
  • ESD protection exceeds JESD 22
  • Fully configurable dual-rail design
  • Robust, glitch-free power supply sequencing
  • Control inputs (DIR and OE) VIH and VIL levels are referenced to VCCA
  • Bus hold on data inputs eliminates the need for external pullup and pulldown resistors
  • VCC isolation feature and VCC disconnect feature
    • if either VCC input is below 100mV or left floating, all I/O outputs are disabled and become high- impedance state
  • Ioff supports Partial-Power-Down node operation
  • Latch-up performance exceeds 100mA per JESD 78, class II
  • ESD protection exceeds JESD 22

The SN74LVCH8T245 is an 8-bit noninverting bus transceiver that uses two separate configurable power-supply rails. The A port is designed to track VCCA, which accepts any supply voltage from 1.65V to 5.5V. The B port is designed to track VCCB, which also accepts any supply voltage from 1.65V to 5.5V. This allows for universal low-voltage bidirectional translation between any of the 1.8V, 2.5V, 3.3V, and 5.5V voltage nodes.

The SN74LVCH8T245 is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR) input and the output-enable (OE) input activate either the B-port outputs, the A-port outputs, or place both output ports into a high-impedance state. The device transmits data from the A bus to the B bus when the B-port outputs are activated, and from the B bus to the A bus when the A-port outputs are activated. The input circuitry on both A and B ports are always 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. 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. The VCC isolation feature is designed so that if either VCCA or VCCB is at GND, then the outputs are in the high-impedance state. To put the device in the high-impedance state during power up or power down, tie OE to VCCA through a pullup resistor; the current-sinking capability of the driver determines the minimum value of the resistor.

The SN74LVCH8T245 is designed so that the control pins (DIR and OE) are referenced to VCCA.

The SN74LVCH8T245 is an 8-bit noninverting bus transceiver that uses two separate configurable power-supply rails. The A port is designed to track VCCA, which accepts any supply voltage from 1.65V to 5.5V. The B port is designed to track VCCB, which also accepts any supply voltage from 1.65V to 5.5V. This allows for universal low-voltage bidirectional translation between any of the 1.8V, 2.5V, 3.3V, and 5.5V voltage nodes.

The SN74LVCH8T245 is designed for asynchronous communication between two data buses. The logic levels of the direction-control (DIR) input and the output-enable (OE) input activate either the B-port outputs, the A-port outputs, or place both output ports into a high-impedance state. The device transmits data from the A bus to the B bus when the B-port outputs are activated, and from the B bus to the A bus when the A-port outputs are activated. The input circuitry on both A and B ports are always 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. 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. The VCC isolation feature is designed so that if either VCCA or VCCB is at GND, then the outputs are in the high-impedance state. To put the device in the high-impedance state during power up or power down, tie OE to VCCA through a pullup resistor; the current-sinking capability of the driver determines the minimum value of the resistor.

The SN74LVCH8T245 is designed so that the control pins (DIR and OE) are referenced to VCCA.

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos SN74LVCH8T245 8-BIT Dual-Supply Bus Transceiver With Configurable Level-Shifting, Voltage Translation, and 3-State Outputs datasheet (Rev. D) PDF | HTML 29/05/2026
Nota sobre la aplicación Schematic Checklist - A Guide to Designing With Fixed or Direction Control Translators PDF | HTML 2/10/2024
Nota sobre la aplicación Schematic Checklist - A Guide to Designing with Auto-Bidirectional Translators PDF | HTML 12/07/2024
Nota sobre la aplicación Understanding Transient Drive Strength vs. DC Drive Strength in Level-Shifters (Rev. A) PDF | HTML 3/07/2024
Guía de selección Voltage Translation Buying Guide (Rev. A) 15/04/2021
Nota sobre la aplicación Designing with SN74LVCXT245 and SN74LVCHXT245 Family of Direction Controlled 27/10/2015

Diseño y desarrollo

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Modelo de simulación

SN74LVCH8T245 IBIS Model

SCEM493.ZIP (55 KB) - Modelo IBIS
Productos y hardware compatibles
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
SSOP (DB) 24 Ultra Librarian
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TVSOP (DGV) 24 Ultra Librarian
TSSOP (PW) 24 Ultra Librarian

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