SN74LVC4245
OCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER
WITH 3-STATE OUTPUTS

SCAS375C - MARCH 1994 - REVISED JANUARY 1997

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features

• EPIC^TM (Enhanced-Performance Implanted CMOS) Submicron Process
• 3.3-V to 5-V Bidirectional Level Shifter
• Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), and Thin Shrink Small-Outline (PW) Packages

EPIC is a trademark of Texas Instruments Incorporated.

description

This 8-bit (octal) noninverting bus transceiver contains two separate supply rails; B port has V_CCB, which is set at 3.3 V, and A port has V_CCA, which is set at 5 V. This allows for translation from a 3.3-V to a 5-V environment, and vice versa.

The SN74LVC4245 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 on 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.

The SN74LVC4245 pinout allows the designer to switch to a normal all-3.3-V or all-5-V 20-pin '245 device without board re-layout. The designer uses the datapaths for pins 2 through 11 and 14 through 23 of the SN74LVC4245 to achieve the conventional '245 layout.

The SN74LVC4245 is characterized for operation from -40°C to 85°C.