May 2007

ASM3P622S00A/B/J/E/K

rev 0.4

Low Frequency Timing-Safe™ Peak EMI Reduction IC

4 of 16

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

Pin Description for ASM3P622S00J

Pin #

Pin Name

Description

1

XIN/CLKIN

Crystal connection or external reference frequency input. This pin has dual functions. It

can be connected either to an external crystal or an external reference clock.

2

XOUT

Crystal connection. If using an external reference, this pin must be left unconnected.

3

SS%

2

Spread Spectrum Selection

4

GND

Ground

5

SSON

2

Spread Spectrum enable and disable option When SSON is HIGH, the spread

spectrum is enabled and when LOW, it turns off the spread spectrum.

6

CLKOUT

1

Buffered clock output

7

3.3V supply

8

NC

No Connect

Notes: 1. Weak pull-down on all outputs

2. Weak pull-up on these Inputs

3. Buffered clock output is Timing-Safe™

Pin Description for ASM3P622S00E

Pin #

Pin Name

Description

1

CLKIN

Input reference frequency, 5V tolerant input

2

CLKOUT1

1

Buffered clock output

3

3.3V supply

4

SS%

2

Spread Spectrum Selection

5

GND

Ground

6

CLKOUT2

1

Buffered clock output

7

CLKOUT3

1

Buffered clock output

8

DLY CNTRL

The pin is used to skew the outputs such that they align with the input. The skew is

in the range of 100-200pS

9

SSON

3

Spread Spectrum enable and disable option. When SSON is HIGH, the spread

spectrum is enabled and when LOW, it turns off the spread spectrum.

10

CLKOUT4

1

Buffered clock output

11

CLKOUT5

1

Buffered clock output

12

GND

Ground

13

3.3V supply

14

CLKOUT6

1

Buffered clock output

15

CLKOUT7

1

Buffered clock output

16

CLKOUT

1

Buffered clock output

Notes: 1. Weak pull-down on all outputs

2. Weak pull-up on these Inputs

3. Buffered clock outputs are Timing-Safe™