说明

This 16-bit (dual-octal) noninverting bus transceiver contains two separate supply rails. B port has V_CCB, which is set to operate at 3.3 V and 5 V. A port has V_CCA, which is set to operate at 2.5 V and 3.3 V. This allows for translation from a 2.5-V to a 3.3-V environment, and vice versa, or from a 3.3-V to a 5-V environment, and vice versa.

The SN74ALVC164245 is designed for asynchronous communication between data buses. The control cirucitry (1DIR, 2DIR, 1OE\, and 2OE\) is powered by V_CCA.

To ensure the high-impedance state during power up or power down, the output-enable (OE)\ input 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.

特性

• Member of the Texas Instruments Widebus™ Family
• Max t_pd of 5.8 ns at 3.3 V
• ±24-mA Output Drive at 3.3 V
• Control Inputs V_IH/V_IL Levels Are Referenced to V_CCA Voltage
• Latch-Up Performance Exceeds 250 mA Per JESD 17

NOTE: New and improved versions of the SN74ALVC164245 are available. The new part numbers are SN74LVC16T245 and SN74LVCH16T245 and should be considered for new designs.

Widebus is a trademark of Texas Instruments.