SN74LVC32245 32-Bit Bus Transceiver With 3-State Outputs | TI.com

SN74LVC32245 (ACTIVE) 32-Bit Bus Transceiver With 3-State Outputs

32-Bit Bus Transceiver With 3-State Outputs - SN74LVC32245
Datasheet
 

Description

This 32-bit noninverting bus transceiver is designed for 1.65-V to 3.6-V VCC operation.

The SN74LVC32245 is designed for asynchronous communication between data buses. The control-function implementation minimizes external timing requirements.

This device can be used as four 8-bit transceivers, two 16-bit transceivers, or one 32-bit transceiver. It 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.

Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators in a mixed 3.3-V/5-V system environment.

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.

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.

Features

  • Member of the Texas Instruments Widebus+™ Family
  • Operate From 1.65 V to 3.6 V
  • Inputs Accept Voltages to 5.5 V
  • Max tpd of 4 ns at 3.3 V
  • Typical VOLP (Output Ground Bounce)
       <0.8 V at VCC = 3.3 V, TA= 25°C
  • Typical VOHV (Output VOH Undershoot)
       >2 V at VCC = 3.3 V, TA = 25°C
  • Ioff Supports Partial-Power-Down Mode Operation
  • Support Mixed-Mode Signal Operation on All Ports (5-V Input/Output Voltage With 3.3-V VCC)

Widebus+ is a trademark of Texas Instruments.

Parametrics

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Part number Order Technology Family VCC (Min) (V) VCC (Max) (V) Bits (#) Voltage (Nom) (V) F @ nom voltage (Max) (MHz) ICC @ nom voltage (Max) (mA) tpd @ nom Voltage (Max) (ns) IOL (Max) (mA) IOH (Max) (mA) Rating Operating temperature range (C)
SN74LVC32245 Order now LVC     1.65     3.6     32     1.8
2.5
2.7
3.3    
100     0.02     7.1
4.5
4.7
4    
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