April 2007

ASM2I9940L

rev 1.2

Low Voltage 1:18 Clock Distribution Chip

5 of 13

Notice: The information in this document is subject to change without notice.

Symbol

Characteristic

Min

Typ

Max

Unit

Condition

Input HIGH Voltage

CMOS_CLK

2.0

V

Input LOW Voltage

CMOS_CLK

0.8

V

Peak–to–Peak Input

Voltage

PECL_CLK

500

1000

mV

Common Mode Range

PECL_CLK

V

Output HIGH Voltage

1.8

V

Output LOW Voltage

0.5

V

Input Current

±200

µA

Input Capacitance

4.0

pF

Power Dissipation Capacitance

10

pF

per output

Output Impedance

23

Ω

Maximum Quiescent Supply Current

0.5

1.0

mA

Symbol

Characteristic

Min

Typ

Max

Unit

Condition

Maximum Input Frequency

250

MHz

Propagation Delay

PECL_CLK < 150MHz

CMOS_CLK < 150MHz

2.0

1.7

2.8

2.5

3.5

3.0

nS

Note

Propagation Delay

PECL_CLK > 150MHz

CMOS_CLK > 150MHz

2.0

1.8

2.9

2.5

3.8

3.3

nS

Output-to-output Skew

PECL_CLK

CMOS_CLK

150

150

pS

Note

1

Part–to–Part Skew

PECL_CLK < 150MHz

CMOS_CLK < 150MHz

1.5

1.3

nS

Notes

1,2

Part–to–Part Skew

PECL_CLK > 150MHz

CMOS_CLK > 150MHz

1.8

1.5

nS

Notes

1,2

Part–to–Part Skew

PECL_CLK CMOS_CLK

850

750

pS

Notes

1,3

DC

Output Duty Cycle

45

40

50

50

55

60

%

%

Input DC = 50%

Input DC = 50%

Output Rise/Fall Time

0.3

1.2

nS

0.5 - 1.8 V

Note: 1.Tested using standard input levels, Production tested @ 150MHz.

2. Across temperature and voltage ranges, includes output skew.

3. For a specific temperature and voltage, includes output skew.