FBL22041BB 查看數據表（PDF） - Philips Electronics

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FBL22041BB

3.3V BTL 7-bit Futurebus + transceiver (standard A-port)

Philips Electronics 

Philips Semiconductors

3.3V BTL 7-bit Futurebus+ transceiver (standard A-port)

Product specification

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 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 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 30Ω making external

terminating resistors unnecessary

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 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 30Ω 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.

QUICK REFERENCE DATA

SYMBOL

tPLH

tPHL

tPLH

tPHL

COB

IOL

ICC

PARAMETER

Propagation delay

AIn to Bn

Propagation delay

Bn to AOn

Output capacitance (B0 - B6 only)

Output current (B0 - B6 only)

Standby

Supply Current

AIn to Bn (outputs Low or High)

Bn to AOn (outputs Low)

Bn to AOn (outputs High)

TYPICAL

4.1

3.6

5.2

5.1

6

100

6.0

5.1

13.4

10.6

UNIT

ns

ns

pF

mA

mA

ORDERING INFORMATION

PACKAGE

52-pin Plastic Quad Flatpack

COMMERCIAL RANGE

VCC = 3.3V±10%; Tamb = 0 to +70°C

FBL22041BB

DWG

No.

SOT379-1

1998 Aug 12

2

853-2039 19863

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