GL640USB View Datasheet(PDF) - Genesys Logic

Part Name

Description

MFG CO.

GL640USB

IEEE-1284 to USB Bridge

Genesys Logic 

Prev 31 32 33 34 35 36 37 38 39

GL640USB, GL640USB-A

11.4 Switching Characteristics

SYMBOL

Description

FX1

TCYC

TX1L

TX1H

Tr30pf

X1 crystal frequency

X1 cycle time

X1 clock LOW time

X1 clock HIGH time

Output pad rise time from 10% to 90% swing with 30pF

loading

Tf30pf

Output pad fall time from 10% to 90% swing with 30pF

loading

Tr50pf

Output pad rise time from 10% to 90% swing with50pF

loading

Tf50pf

Output pad fall time from 10% to 90% swing with 50pF

loading

TrUSB

TfUSB

D+/D- rise time with 50pF loading

D+/D- fall time with 50pF loading

MIN

11.97

0.45Tcyc

0.45Tcyc

6

5.3

9.5

7.7

4

4

TYP

12

83.3

8

7

13

10

MAX

12.03

12

10.4

19

16

20

20

UNIT

MHz

ns

ns

ns

ns

ns

ns

ns

ns

ns

Revision 1.1

-35-

Jun. 7, 1999

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