P2560B-08ST ALSC [Alliance Semiconductor Corporation], P2560B-08ST Datasheet - Page 2

• Manufacturer Part Number: P2560B-08ST
• Description: Low Frequency EMI Reduction
• Manufacturer: ALSC [Alliance Semiconductor Corporation]

November 2003
rev 1.0
Pin Configuration
Standby Mode Selection
Spread Range Selection, VDD = 3.3 V
Pin Description
Pin#
Disabled
Disabled
Enabled
Enabled
1
2
3
4
5
6
7
8
CLKIN
Pin Name
MODOUT
CLKIN frequency
XIN/CLK
SSON#
XOUT
DIV2
VSS
VDD
SR0
20 MHz
25 MHz
27 MHz
30 MHz
32 MHz
SSON/SBM
0
1
0
1
Type
O
O
P
P
I
I
I
I
Crystal connection or external reference frequency input. This pin has dual
functions. It can be connected to either an external crystal or an external
reference clock.
Crystal connection. If using an external reference, this pin must be left
unconnected.
Digital logic input used to select normal output mode or divide-by-2 output mode.
When this pin is HIGH, the frequency of the output clock is the same as the input
clock frequency. When it is tied LOW, the output frequency is half the input clock
frequency. This pin has an internal pull-up resistor.
Ground to entire chip.
Digital logic input used to select Spreading Range (Refer Spread Deviation
Table). This pin has an internal pull-up resistor.
Digital logic input used to enable Spread Spectrum function (Active LOW).
Spread Spectrum function enabled when LOW, disabled when HIGH. This pin
has an internal pull-low resistor.
Spread spectrum low EMI output.
Power supply for the entire chip (5V).
Notice: The information in this document is subject to change without notice.
Spread Spectrum
Low Frequency EMI Reduction
N/A
N/A
Off
On
Spreading range
±1.16%
±1.13%
±1.11%
P2560B
±1.0%
±1.0%
Reference
ModOUT
Disabled
Disabled
Normal
Description
Disabled
Disabled
running
Normal
Free
PLL
(CLKIN/10) * 20.83 kHz
Modulation rate
Free running
Buffer out
Standby
Normal
Mode
2 of 7
P2560B