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 10Ω.

•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