Catalog
Octal bus transceivers with tri-state outputs
Key Features
• 2-V to 5.5-V V CC operationMaximum t pd of 6.5 ns at 5 VTypical V OLP (output ground bounce) <0.8 V at V CC = 3.3 V, T A = 25°CTypical V OHV (output V OH undershoot) >2.3 V at V CC = 3.3 V, T A = 25°CSupport mixed-mode voltage operation on all portsI off supports partial-power-down mode operationLatch-up performance exceeds 250 mA per JESD 17ESD protection exceeds JESD 222000-V Human-Body Model (A114-A)200-V Machine Model (A115-A)1000-V Charged-Device Model (C101)2-V to 5.5-V V CC operationMaximum t pd of 6.5 ns at 5 VTypical V OLP (output ground bounce) <0.8 V at V CC = 3.3 V, T A = 25°CTypical V OHV (output V OH undershoot) >2.3 V at V CC = 3.3 V, T A = 25°CSupport mixed-mode voltage operation on all portsI off supports partial-power-down mode operationLatch-up performance exceeds 250 mA per JESD 17ESD protection exceeds JESD 222000-V Human-Body Model (A114-A)200-V Machine Model (A115-A)1000-V Charged-Device Model (C101)
Description
AI
This octal bus transceiver is designed for asynchronous two-way communication between data buses. The control-function implementation minimizes external timing requirements.
The SN74LV245AT 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 device so that the buses are effectively isolated.
To ensure the high-impedance state during power up or power down,OEshould be tied to VCCthrough 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 partial-power-down applications using Ioff. The Ioffcircuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.
This octal bus transceiver is designed for asynchronous two-way communication between data buses. The control-function implementation minimizes external timing requirements.
The SN74LV245AT 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 device so that the buses are effectively isolated.
To ensure the high-impedance state during power up or power down,OEshould be tied to VCCthrough 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 partial-power-down applications using Ioff. The Ioffcircuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.
