SN74ABT2245 Datasheet | Texas Instruments

description These octal transceivers and line drivers are designed for asynchronous munication between data buses. The devices transmit 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 (OE) input can be used to disable the device so the buses are effectively isolated. A8 B8 SN54ABT2245 . . . J OR W PACKAGE SN74ABT2245 . . . DB, DW, N, OR PW PACKAGE (TOP VIEW) DIR 1 A1 2 A2 3 A3 4 A4 5 A5 6 A6 7 A7 8 A8 9 GND 10 20 VCC 19 OE 18 B1 17 B2 16 B3 15 B4 14 B5 13 B6 12 B7 11 B8 SN54ABT2245 . . . FK PACKAGE (TOP VIEW) VC C A1 A2 3 2 1 20 19 A3 4 18 B1 A4 5 17 B2 A5 6 16 B3 A6 7 15 B4 A7 8 14 B5 9 10 11 12 13 B7 B6 The B-port outputs, which are designed to sink up to 12 m A, include equivalent 25-Ω series resistors to reduce overshoot and undershoot. When VCC is between 0 and 2.1 V, the device is in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 2.1 V, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking/current-sourcing capability of the driver. The SN54ABT2245 is characterized for operation over the full military temperature range of - 55°C to 125°C. The SN74ABT2245 is characterized for operation from - 40°C to 85°C. FUNCTION TABLE INPUTS OE...