二极管

USB

三极管

可控硅(晶闸管)

场效应管(MOSFET)

集成电路

连接器

LED系列产品

电感器

继电器

传感器

电容器

电阻器

保护器件

光电器件

压电晶体

开关原件

功率模块

特性

• Member of the Texas Instruments Widebus+™ Family
• State-of-the-Art Advanced BiCMOS Technology (ABT) Design for 3.3-V Operation and Low Static-Power Dissipation
• Typical V_OLP (Output Ground Bounce) <0.8 V at V_CC = 3.3 V, T_A = 25°C
• I_off and Power-Up 3-State Support Hot Insertion
• Supports Unregulated Battery Operation Down to 2.7 V
• Supports Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V V_CC)
• Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
• ESD Protection Exceeds JESD 22
  • 2000-V Human-Body Model (A114-A)
  • 200-V Machine Model (A115-A)
  • 1000-V Charged-Device Model (C101)

Widebus+ is a trademark of Texas Instruments.

DESCRIPTION/ORDERING INFORMATION

The SN74LVTH32245 is a 32-bit noninverting 3-state transceiver designed for low-voltage (3.3-V) V_CC operation, but with the capability to provide a TTL interface to a 5-V system environment.

This device can be used as four 8-bit transceivers, two 16-bit transceivers, or one 32-bit transceiver. The device allows data transmission 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 devices so that the buses are effectively isolated.

When V_CC is between 0 and 1.5 V, the device is in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.5 V, OE should be tied to V_CC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

This device is fully specified for hot-insertion applications using I_off and power-up 3-state. The I_off circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down, which prevents driver conflict.

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.