FB2041

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 I_CC current
• Tight output skew
• Supports live insertion
• Pins for the optional JTAG boundary scan function are provided
• High density packaging in plastic Quad Flatpack


Application

Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification.


Pinout




Specifications

Operation beyond the limits set forth in this table may impair the useful life of the device. Unless otherwise noted these limits are over theoperating free-air temperature range.

SYMBOL	PARAMETER		RATING	UNIT
VCC	Supply voltage		-0.5 to +7.0	V
VIN	Input voltage	AI0 AI6, OEB0, OEBn, OEAn	-1.2 to +7.0	V
		BO -B6	-1.2 to +5.5
IIN	Input current		-18 to +5.0	mA
VOUT	Voltage applied to output in High output state		-0.5 to +VCC	V
IOUT	Current applied to output in Low output state	AO0 AO6	48	mA
		B0	200
TSTG	Storage temperature		-65 to +150

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 FB2041 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.