SN54ABT640 Datasheet | Texas Instruments

description The ’ABT640 bus transceivers are designed for asynchronous munication between data buses. These devices transmit inverted data from the A bus to the B bus or from the B bus to the A bus, depending on the level at the directioncontrol (DIR) input. The output-enable (OE) input can be used to disable the device so that the buses are effectively isolated. A3 3 2 1 20 19 B1 A4 5 17 B2 A5 6 16 B3 A6 7 15 B4 A7 8 14 B5 9 10 11 12 13 B6 B7 B8 A8 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. The SN54ABT640 is characterized for operation over the full military temperature range of - 55°C to 125°C. The SN74ABT640 is characterized for operation from - 40°C to 85°C. FUNCTION TABLE INPUTS OE DIR OPERATION B data to A bus H A data to B bus Isolation Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. EPIC-ΙΙB is a trademark of Texas Instruments Incorporated. UNLESS OTHERWISE NOTED this document contains PRODUCTION DATA information current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. - POST OFFICE BOX 655303 DALLAS, TEXAS...