ICS309 Integrated Circuit System, ICS309 Datasheet - Page 3

• Manufacturer Part Number: ICS309
• Manufacturer: Integrated Circuit System

MDS 309 A
Int egrat ed C ircuit Syst ems
Configuring the ICS309
Initial State: The ICS309 may be configured to have up to 9 frequency outputs, utilizing the 4 on-board
PLLs and spread spectrum circuitry. Unprogrammed, the part has the following outputs, related to the
reference input clock:
The input crystal range for the ICS309 is 5MHz to 27MHz.
The ICS309 can be programmed to set the output functions and frequencies. 160 data bits generated by
the VersaClock
As show in Figure 2, after these 160 bits are clocked into the ICS309, taking STROBE high will send this
data to the internal hatch and the CLK output will lock within 10 ms.
Note: If STROBE is in the high state and SCLK is pulsed, DATA is clocked directly to the internal latch and
the output conditions will change accordingly. Although this will not damage the ICS309, it is recommended
that STROBE be kept low while DATA is being clocked into the ICS309 in order to avoid unintended
changes on the output clocks.
All outputs may be turned off during initialization by bringing the PDTS pin to Ground. When PDTS is
brought high, after the Strobe pin in brought high, the programmed output frequencies will be available.
Clock 1 (Pin 7)
Clock 2 (Pin 8)
Clock 3 (Pin 9)
Clock 4 (Pin 10)
Clock 5 (Pin 14)
Clock 6 (Pin 13)
Clock 7 (Pin 12)
Clock 8 (Pin 11)
Clock 9 (Pin 4)
P r e l i m i n a r y I n f o r m a t i o n
Output
Default Outputs
TM
software are written in DATA pin in this order: MSB (left most bit) first.
52 5 Race Str eet, San Jose, C A 9 5126
Reference Output
Reference Output
Reference Output
Reference Output
Reference Output
Reference Output
Reference Output
Reference Output
Reference Output
Frequency
3
S
ERIAL
P
ROGRAMMABLE
tel ( 408) 295- 9800
T
RIPLE
w w w.i c s t .c o m
Revision 053003
SS C
ICS309
LOCK