DESCRIPTION

The FB2041 is a 7-bit bidirectional BTL transceiver and is intended to provide the electrical interface to a high performance wired-OR bus. The FB2041 is an inverting transceiver.

The B-port drivers are Low-capacitance open collectors with controlled ramp and are designed to sink 100mA. Precision band gap references on the B-port insure very good noise margins by limiting the switching threshold to a narrow region centered at 1.55V.

FEATURES

?7-bit BTL transceiver

?Separate I/O on TTL A-port

?Inverting

?Three separate pairs of driver enables in a 1 bit, 3 bit, 3 bit arrangement

?Drives heavily loaded backplanes with equivalent load impedances down to 10?.

?High drive 100mA BTL open collector drivers on B-port

?Allows incident wave switching in heavily loaded backplane buses

?Reduced BTL voltage swing produces less noise and reduces power consumption

?Built-in precision band-gap reference provides accurate receiver thresholds and improved noise immunity

?Compatible with IEEE Futurebus+ or proprietary BTL backplanes

?Controlled output ramp and multiple GND pins minimize ground bounce

?Each BTL driver has a dedicated Bus GND for a signal return

?Glitch-free power up/power down operation

?Low ICCcurrent

?Tight output skew

?Supports live insertion

?Pins for the optional JTAG boundary scan function are provided

?High density packaging in plastic Quad Flatpack