ICS650R-27 Integrated Circuit Systems, ICS650R-27 Datasheet

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ICS650R-27

Manufacturer Part Number
ICS650R-27
Description
Networking Clock Source
Manufacturer
Integrated Circuit Systems
Datasheet

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Part Number:
ICS650R-27I
Manufacturer:
ICS
Quantity:
93
MDS 650-27 D
Description
The ICS650-27 is a low cost, low jitter, high
performance clock synthesizer for networking
applications. Using analog Phase-Locked Loop (PLL)
techniques, the device accepts a 12.5 MHz or 25 MHz
clock or fundamental mode crystal input to produce
multiple output clocks for networking chips, PCI
devices, SDRAM, and ASICs. The ICS650-27 outputs
all have zero ppm synthesis error.
The ICS650-27 is pin compatible and functionally
equivalent to the ICS650-07. It is a performance
upgrade and is recommended for all new 3.3V
designs.
See the MK74CB214, ICS551, and ICS552-01 for
non-PLL buffer devices which produce multiple
low-skew copies of these output clocks.
See the ICS570, ICS9112-16/17/18 for zero delay
buffers that can synchronize outputs and other needed
clocks.
Block Diagram
Integrated Circuit Systems, Inc.
25 or 12.5 MHz
cyrstal or clock
ACS1:0
BCS1:0
CCS
X2
X1/ICLK
2
2
525 Race Street, San Jose, CA 95126
Oscillator
Crystal
Buffer/
Clock
1
Features
and Control
Synthesis
Packaged in 20-pin (150 mil) SSOP (QSOP)
Available in Pb (lead) free package
12.5 MHz or 25 MHz fundamental crystal or clock
input
Six output clocks with selectable frequencies
SDRAM frequencies of 67, 83, 100, and 133 MHz
Buffered crystal reference output
Zero ppm synthesis error in all clocks
Ideal for PMC-Sierra’s ATM switch chips
Full CMOS output swing with 25 mA output drive
capability at TTL levels
Advanced, low-power, sub-micron CMOS process
Operating voltage of 3.3 V
Industrial temperature only
Circuitry
Clock
GND
VDD
2
2
Networking Clock Source
tel (408) 297-1201
/2
/2
OE (all outputs)
ICS650-27
CLKA1
CLKA2
CLKB1
CLKB2
CLKC1
CLKC2
REFOUT
www.icst.com
Revision 070505

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ICS650R-27 Summary of contents

Page 1

... Block Diagram 2 ACS1:0 BCS1:0 CCS X1/ICLK 25 or 12.5 MHz cyrstal or clock X2 MDS 650-27 D Integrated Circuit Systems, Inc. ● Features • Packaged in 20-pin (150 mil) SSOP (QSOP) • Available in Pb (lead) free package • 12.5 MHz or 25 MHz fundamental crystal or clock input • ...

Page 2

... Power 17 CLKA1 Output 18 REFOUT Output 19 BCS0 Input 20 BCS1 Input MDS 650-27 D Integrated Circuit Systems, Inc. ● BCS1 BCS0 REFOUT CLKA1 VDD OE GND CLKA2 DC CCS Pin Description A clock select 0. Selects outputs on CLKA1 and CLKA2 per table on page 3. Crystal connection. Connect to a fundamental crystal or leave unconnected for a clock input ...

Page 3

... CCS CLKC1 CLKC2 0 62.5 62.5 M Test Test 1 37.5 37 connect directly to GND M = leave unconnected (automatically self biases to VDD/ connect directly to VDD MDS 650-27 D Integrated Circuit Systems, Inc. ● B Clocks Select Table (outputs in MHz) CLKA2 BSC1 off (low) 0 Test 0 off (low) 0 16.6667 1 Test 1 33.3333 ...

Page 4

... Recommended Operation Conditions Parameter Ambient Operating Temperature Power Supply Voltage (measured in respect to GND) MDS 650-27 D Integrated Circuit Systems, Inc. ● Crystal Information The crystal used should be a fundamental mode (do not use third overtone), parallel resonant. Crystal capacitors should be connected from pins X1 to ground and X2 to ground to optimize the initial accuracy ...

Page 5

... Output Clock Duty Cycle Frequency Error Absolute Jitter, short term Note 1: Measured with 15 pF load Thermal Characteristics Parameter Thermal Resistance Junction to Ambient Thermal Resistance Junction to Case MDS 650-27 D Integrated Circuit Systems, Inc. ● Symbol Conditions VDD V X1 pin only, CLK input IH V ...

Page 6

... Marking ICS650R-27I ICS650R-27I ICS650R-27IT ICS650R-27I ICS650R-27ILF 650R-27ILF ICS650R-27ILFT 650R-27ILF Parts that are ordered with a "LF" suffix to the part number are the Pb-Free configuration and are RoHS compliant. While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems (ICS) assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use ...

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