FBL22041

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 10W.
• 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 ICC current
• Tight output skew
• Supports live insertion
• Pins for the optional JTAG boundary scan function are provided
• High density packaging in plastic Quad Flatpack
• 5V compatible I/O on A-port
• The A port includes a series resistor of 30W making external terminating resistors unnecessary


Pinout




Specifications

SYMBOL	PARAMETER		RATING	UNIT
VCC	Supply voltage		-0.5 to +4.6	V
VIN	Input voltage	AI0 AI6, OEB0, OEBn, OEAn	-0.5 to +4.6	V
		B0 B6	-0.5 to +3.5
IIN	Input current	VIN < 0	-50
VOUT	Voltage applied to output in High output state		-0.5 to +7.0	V
LOUT	Current applied to output in Low output state	AO0 AOn	48.24	mA
		B0 B6	200
TSTG	Storage temperature		-65 to +150	°C

Description

The FBL22041 is a 7-bit bidirectional BTL transceiver and is intended to provide the electrical interface to a high performance wired-OR bus. The FBL22041 is an inverting transceiver.

The FBL22041 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.

The FBL22041 is designed with a 30W series resistance in both the HIGH and LOW states of the output.

The FBL22041 is pin and function compatible with FB2041 but operates at a 3.3V supply voltage, greatly reducing power consumption.