CD3207 datasheet(2/14 Pages) PHILIPS

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Philips Semiconductors

Product specification

FB2041

7-bit Futurebus+ transceiver

1995 May 25

853-1561 15279

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

Ω.

• 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

QUICK REFERENCE DATA

SYMBOL

PARAMETER

TYPICAL

UNIT

tPLH

Propagation delay

3.7

tPHL

AIn to Bn

2.7

tPLH

Propagation delay

3.4

tPHL

Bn to AOn

3.2

COB

Output capacitance (B0 - B6 only)

IOL

Output current (B0 - B6 only)

100

Standby

ICC

Supply Current

AIn to Bn (outputs Low or High)

ICC

Supply Current

Bn to AOn (outputs Low)

Bn to AOn (outputs High)

ORDERING INFORMATION

PACKAGE

COMMERCIAL RANGE

VCC = 5V±10%; Tamb = 0 to +70°C

INDUSTRIAL RANGE

VCC = 5V±10%; Tamb = -40 to +85°C

DWG

No.

52-pin Plastic Quad Flatpack

FB2041BB

CD3207BB

SOT379-1

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