SN74LVT162245A Series
3.3-V ABT 16-Bit Bus Transceivers With 3-State Outputs
Manufacturer: Texas Instruments
Catalog
3.3-V ABT 16-Bit Bus Transceivers With 3-State Outputs
Key Features
• Members of the Texas Instruments Widebus™ FamilyA-Port Outputs Have Equivalent 22-Series Resistors, So No External Resistors Are RequiredSupprt Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V VCC)Support Unregulated Battery Operation Down to 2.7 VTypical VOLP(Output Ground Bounce) <0.8 V at VCC= 3.3 V, TA= 25°CIoffand Power-Up 3-State Support Hot InsertionDistributed VCCand GND Pins Minimize High-Speed Switching NoiseFlow-Through Architecture Optimizes PCB LayoutLatch-Up Performance Exceeds 100 mA Per JESD 78, Class IIESD Protection Exceeds JESD 222000-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.Members of the Texas Instruments Widebus™ FamilyA-Port Outputs Have Equivalent 22-Series Resistors, So No External Resistors Are RequiredSupprt Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V VCC)Support Unregulated Battery Operation Down to 2.7 VTypical VOLP(Output Ground Bounce) <0.8 V at VCC= 3.3 V, TA= 25°CIoffand Power-Up 3-State Support Hot InsertionDistributed VCCand GND Pins Minimize High-Speed Switching NoiseFlow-Through Architecture Optimizes PCB LayoutLatch-Up Performance Exceeds 100 mA Per JESD 78, Class IIESD Protection Exceeds JESD 222000-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
AI
The 'LVT162245A devices are 16-bit (dual-octal) noninverting 3-state transceivers designed for low-voltage (3.3-V) VCCoperation, but with the capability to provide a TTL interface to a 5-V system environment.
These devices are 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 or the A-port outputs or place both output ports into the high-impedance mode. 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 is always active and must have a logic HIGH or LOW level applied to prevent excess ICCand ICCZ.
The A-port outputs, which are designed to source or sink up to 12 mA, include equivalent 22-series resistors to reduce overshoot and undershoot.
When VCCis between 0 and 1.5 V, the devices are in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.5 V,OEshould be tied to VCCthrough a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
These devices are fully specified for hot-insertion applications using Ioffand power-up 3-state. The Ioffcircuitry disables the outputs, preventing damaging current backflow through the devices when they are 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.
The 'LVT162245A devices are 16-bit (dual-octal) noninverting 3-state transceivers designed for low-voltage (3.3-V) VCCoperation, but with the capability to provide a TTL interface to a 5-V system environment.
These devices are 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 or the A-port outputs or place both output ports into the high-impedance mode. 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 is always active and must have a logic HIGH or LOW level applied to prevent excess ICCand ICCZ.
The A-port outputs, which are designed to source or sink up to 12 mA, include equivalent 22-series resistors to reduce overshoot and undershoot.
When VCCis between 0 and 1.5 V, the devices are in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.5 V,OEshould be tied to VCCthrough a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
These devices are fully specified for hot-insertion applications using Ioffand power-up 3-state. The Ioffcircuitry disables the outputs, preventing damaging current backflow through the devices when they are 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.
