SN54LVTR245, SN74LVTR245
3.3-V ABT OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS

SCAS428 - OCTOBER 1993

features

• State-of-the-Art Advanced BiCMOS Technology (ABT) Design for 3.3-V Operation and Low-Static Power Dissipation
• Supports Mixed-Mode Signal Operation (5-V Input and Output Voltages With 3.3-V V_CC)
• Supports Unregulated Battery Operation Down to 2.7 V
• Typical V_OLP (Output Ground Bounce)< 0.8 V at V_CC = 3.3 V, T_A = 25°C
• Latch-Up Performance Exceeds 500 mA Per JEDEC Standard JESD-17
• Bus-Hold Data Inputs Eliminate the Need for External Pullup Resistors
• Reduced Output Structure on A Port Minimizes V_OHV
• Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), and Thin Shrink Small-Outline (PW) Packages, Ceramic Chip Carriers (FK), and Ceramic DIPs (J)

description

These octal bus transceivers are designed specifically for low-voltage (3.3-V) V_CC operation, but with the capability to provide a TTL interface to a 5-V system environment.

The ´LVTR245 is designed for asynchronous communication between data buses. The device transmits data from the A bus to the B bus or from the B bus to the A bus depending upon the logic level at the direction-control (DIR) input. The output-enable () input can be used to disable the device so the buses are effectively isolated.

Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.

The A port is designed to minimize the undershoot exhibited on high to low transition during simultaneous switching conditions.

The SN74LVTR245 is available in TI's shrink small-outline package (DB), which provides the same I/O pin count and functionality of standard small-outline packages in less than half the printed-circuit-board area.

The SN54LVTR245 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74LVTR245 is characterized for operation from -40°C to 85°C.