W256 datasheet(5/7 Pages) SPECTRALINEAR

Part #	W256

Description	12 Output Buffer for 2 DDR and 3 SRAM DIMMS

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Manufacturer	SPECTRALINEAR [SpectraLinear Inc]

Direct Link	http://www.spectralinear.com

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5 / 7 page

W256

Rev 1.0, November 25, 2006

Page 5 of 7

t3d

DDR Rising Edge Rate[4]

Measured between 20% to 80% of

output (Refer to Figure 1)

0.5

1.50

V/ns

t4d

DDR Falling Edge Rate[4]

Measured between 20% to 80% of

output (Refer to Figure 1)

0.5

1.50

V/ns

t5

Output to Output Skew[4]

All outputs equally loaded

100

ps

t6

Output t4o Output Skew for

SDRAM[2]

All outputs equally loaded

150

ps

t7

SDRAM Buffer HH Prop. Delay[4] Input edge greater than 1 V/ns

5

10

ns

t8

SDRAM Buffer LLProp. Delay[4]

Input edge greater than 1 V/ns

5

10

ns

Switching Waveforms

Switching Characteristics[4]

Parameter

Name

Test Conditions

Min.

Typ.

Max.

Unit

Duty Cycle Timing

t1

t2

All Outputs Rise/Fall Time

OUTPUT

t3

3.3V

0V

0.4V

2.4V

0.4V

t4

Output-Output Skew

t5

OUTPUT

SDRAM Buffer HH and LL Propagation Delay

t6

INPUT

OUTPUT

t7

1.5V

Notes:

4. All parameters specified with loaded outputs.

5. Duty cycle of input clock is 50%. Rising and falling edge rate is greater than 1V/ns.

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W256 Datasheet(PDF) 5 Page - SpectraLinear Inc

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