87604GILFT [IDT]

Clock Generator, PDSO28;
87604GILFT
型号: 87604GILFT
厂家: INTEGRATED DEVICE TECHNOLOGY    INTEGRATED DEVICE TECHNOLOGY
描述:

Clock Generator, PDSO28

光电二极管
文件: 总11页 (文件大小:155K)
中文:  中文翻译
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ICS87604I  
LOW VOLTAGE/LOW SKEW, 1:4 PCI/PCI-X  
ZERO DELAY CLOCK GENERATOR  
Integrated  
Circuit  
Systems, Inc.  
GENERAL DESCRIPTION  
FEATURES  
Fully integrated PLL  
The ICS87604I is a 1:4 PCI/PCI-X Clock  
ICS  
Generator and a member of the HiPerClockSTM  
family of high performance clock solutions from  
ICS.The ICS87604I has a selectable REF_CLK  
or crystal input. The REF_CLK input accepts  
4 LVCMOS/LVTTL outputs, 15Ω typical output impedance  
HiPerClockS™  
Selectable crystal oscillator interface or  
LVCMOS/LVTTL REF_IN clock input  
LVCMOS or LVTTL input levels. The ICS87604I has a fully  
integrated PLL along with frequency configurable clock and  
feedback outputs for multiplying and regenerating clocks with  
“zero delay”. The PLLs VCO has an operating range of  
250MHz-500MHz, allowing this device to be used in a variety  
of general purpose clocking applications. For PCI/PCI-X  
applications in particular, the VCO frequency should be set to  
400MHz.This can be accomplished by supplying 33.33MHz,  
25MHz, 20MHz, or 16.66MHz on the reference clock or crystal  
input and by selecting ÷12, ÷16, ÷20, or ÷24, respectively as  
the feedback divide value.The divider on the output bank can  
then be configured to generate 33.33MHz (÷12), 66.66MHz  
(÷6), 100MHz (÷4), or 133.33MHz (÷3).  
Maximum output frequency: 166.67MHz  
Maximum crystal input frequency: 38MHz  
Maximum REF_IN input frequency: 41.67MHz  
Individual banks with selectable output dividers for  
generating 33.333MHz, 66.66MHz, 100MHz and  
133.333MHz  
Separate feedback control for generating PCI / PCI-X  
frequencies from a 16.66MHz or 20MHz crystal, or 25MHz  
or 33.33MHz reference frequency  
VCO range: 250MHz to 500MHz  
Cycle-to-cycle jitter: 120ps (maximum)  
Period jitter, RMS: 20ps (maximum)  
Output skew: 65ps (maximum)  
The ICS87604I is characterized to operate with its core supply  
at 3.3V and the bank supply at 3.3V or 2.5V.The ICS87604I is  
packaged in a small 6.1mm x 9.7mm TSSOP body, making it  
ideal for use in space-constrained applications.  
Static phase offset: 160ps 160ps  
Voltage Supply Modes:  
VDD/VDDA/VDDO  
3.3/3.3/3.3  
3.3/3.3/2.5  
-40°C to 85°C ambient operating temperature  
Lead-Free package fully RoHS compliant  
BLOCK DIAGRAM  
DIV_SEL0  
DIV_SEL1  
PIN ASSIGNMENT  
XTAL_SEL  
1
2
3
4
VDD  
FB_IN  
GND  
28  
27  
26  
25  
FBDIV_SEL1  
FBDIV_SEL0  
DIV_SEL1  
Q0  
Q1  
Q2  
Q3  
0
0
1
0
1
0
÷3  
÷4  
REF_IN  
FB_OUT  
REF_OUT  
VDDO  
DIV_SEL0  
nc  
0
1
0
1
24  
23  
22  
21  
20  
19  
5
6
7
8
XTAL_IN  
÷6  
MR  
nc  
OSC  
÷12  
1
1
Q3  
XTAL_OUT  
PLL  
Q2  
GND  
GND  
nc  
GND  
Q1  
Q0  
9
FB_IN  
10  
11  
12  
13  
18  
17  
16  
15  
REF_IN  
XTAL_OUT  
XTAL_IN  
VDDO  
PLL_SEL  
VDDA  
÷12  
÷16  
÷20  
0
0
1
0
1
0
PLL_SEL  
REF_OUT  
FB_OUT  
14  
XTAL_SEL  
÷24  
1
1
ICS87604I  
28-Lead TSSOP, 240-MIL  
6.1mm x 9.7mm x 0.92mm  
body package  
FBDIV_SEL1  
FBDIV_SEL0  
MR  
G Package  
TopView  
87604AGI  
www.icst.com/products/hiperclocks.html  
REV. A APRIL 12, 2005  
1
ICS87604I  
LOW VOLTAGE/LOW SKEW, 1:4 PCI/PCI-X  
ZERO DELAY CLOCK GENERATOR  
Integrated  
Circuit  
Systems, Inc.  
TABLE 1. PIN DESCRIPTIONS  
Number  
Name  
Type  
Description  
1
VDD  
Power  
Input  
Core supply pin.  
Feedback input to phase detector for generating clocks with  
"zero delay". LVCMOS / LVTTL interface levels.  
2
FB_IN  
Pulldown  
3, 9, 20, 21  
GND  
FB_OUT  
REF_OUT  
VDDO  
Power  
Output  
Output  
Power  
Power supply ground.  
4
5
Feedback output. Connect to FB_IN. LVCMOS / LVTTL interface levels.  
Reference clock output. LVCMOS / LVTTL interface levels.  
Output supply pin  
6, 12  
7, 8,  
10, 11  
Q3, Q2,  
Q1, Q0  
Clock outputs. 15Ω typical output impedance.  
LVCMOS / LVTTL interface levels.  
Output  
Selects between PLL and bypass mode. When HIGH, selects PLL.  
When LOW, selects reference clock. LVCMOS / LVTTL interface levels.  
13  
14  
PLL_SEL  
VDDA  
Input  
Pullup  
Pullup  
Power  
Analog supply pin. See Applications Note for filtering.  
Selects between crystal oscillator or reference clock as the PLL  
reference source. Selects XTAL inputs when HIGH. Selects REF_IN  
when LOW. LVCMOS / LVTTL interface levels.  
Crystal oscillator interface. XTAL_IN is the input.  
XTAL_OUT is the output.  
15  
XTAL_SEL  
Input  
16,  
17  
XTAL_IN,  
XTAL_OUT  
Input  
18  
REF_IN  
nc  
Input  
Pulldown Reference clock input. LVCMOS / LVTTL interface levels.  
No connect.  
19, 22, 24  
Unused  
Active HIGH Master Reset. When logic HIGH, the internal dividers  
Pulldown are reset causing the outputs go low. When logic LOW, the internal  
dividers and the outputs are enabled. LVCMOS / LVTTL interface levels.  
23  
MR  
Input  
25,  
26  
27,  
28  
DIV_SEL0,  
DIV_SEL1  
FBDIV_SEL0,  
FBDIV_SEL1  
Selects divide value for clock outputs as described in Table 3.  
LVCMOS / LVTTL interface levels.  
Selects divide value for reference clock output and feedback output.  
LVCMOS / LVTTL interface levels.  
Input  
Input  
Pulldown  
Pulldown  
NOTE: Pullup and Pulldown refer to internal input resistors. See Table 2, Pin Characteristics, for typical values.  
TABLE 2. PIN CHARACTERISTICS  
Symbol Parameter  
Test Conditions  
Minimum Typical Maximum Units  
CIN  
Input Capacitance  
Input Pullup Resistor  
4
pF  
kΩ  
kΩ  
pF  
pF  
Ω
RPULLUP  
51  
51  
9
RPULLDOWN Input Pulldown Resistor  
VDD, VDDA, VDDO = 3.465V  
Power Dissipation Capacitance  
(per output); NOTE 1  
CPD  
V
DD, VDDA = 3.465V; VDDO = 2.625V  
11  
ROUT  
Output Impedance  
15  
87604AGI  
www.icst.com/products/hiperclocks.html  
REV. A APRIL 12, 2005  
2
ICS87604I  
LOW VOLTAGE/LOW SKEW, 1:4 PCI/PCI-X  
ZERO DELAY CLOCK GENERATOR  
Integrated  
Circuit  
Systems, Inc.  
TABLE 3A. OUTPUT CONTROL PIN FUNCTION TABLE  
Inputs  
Outputs  
MR  
1
Q0:Q3  
LOW  
FB_OUT, REF_OUT  
LOW  
0
Active  
Active  
TABLE 3C. PLL INPUT FUNCTION TABLE  
Inputs  
TABLE 3B. OPERATING MODE FUNCTION TABLE  
Inputs  
Operating Mode  
PLL_SEL  
XTAL_SEL  
PLL Input  
REF_IN  
0
1
Bypass  
PLL  
0
1
XTAL Oscillator  
TABLE 3D. CONTROL FUNCTION TABLE  
Outputs  
Frequency  
Inputs  
PLL_SEL=1  
Reference  
Frequency  
Range (MHz)  
FB_OUT  
(MHz)  
FBDIV_SEL1 FBDIV_SEL0 DIV_SEL1 DIV_SEL0  
Q0:Q3  
Q0:Q3 (MHz)  
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
16.67 - 41.67  
16.67 - 41.67  
16.67 - 41.67  
16.67 - 41.67  
12.5 - 31.25  
12.5 - 31.25  
12.5 - 31.25  
12.5 - 31.25  
10 - 25  
x 4  
x 3  
66.68 - 166.68  
50 - 125  
16.67 - 41.67  
16.67 - 41.67  
16.67 - 41.67  
16.67 - 41.67  
12.5 - 31.25  
12.5 - 31.25  
12.5 - 31.25  
12.5 - 31.25  
10 - 25  
x 2  
33.34 - 83.34  
16.67 - 41.67  
66.63 - 166.56  
50 - 125  
x 1  
x 5.33  
x 4  
x 2.667  
x 1.33  
x 6.667  
x 5  
33.34 - 83.34  
16.63 - 41.56  
66.67 - 166.68  
50 - 125  
10 - 25  
10 - 25  
10 - 25  
x 3.33  
x 1.66  
x 8  
33.30 - 83.25  
16.60 - 41.50  
66.64 - 166.64  
50 - 125  
10 - 25  
10 - 25  
10 - 25  
8.33 - 20.83  
8.33 - 20.83  
8.33 - 20.83  
8.33 - 20.83  
8.33 - 20.83  
8.33 - 20.83  
8.33 - 20.83  
8.33 - 20.83  
x 6  
x 4  
33.32 - 83.32  
16.66 - 41.66  
x 2  
NOTE: VCO frequency range for all configurations above is 250MHz to 500MHz.  
87604AGI  
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REV. A APRIL 12, 2005  
3
ICS87604I  
LOW VOLTAGE/LOW SKEW, 1:4 PCI/PCI-X  
ZERO DELAY CLOCK GENERATOR  
Integrated  
Circuit  
Systems, Inc.  
ABSOLUTE MAXIMUM RATINGS  
SupplyVoltage, VDD  
Inputs, VI  
4.6V  
NOTE: Stresses beyond those listed under Absolute  
Maximum Ratings may cause permanent damage to the  
device.These ratings are stress specifications only.Functional  
operation of product at these conditions or any conditions be-  
yond those listed in the DC Characteristics or AC Character-  
istics is not implied. Exposure to absolute maximum rating  
conditions for extended periods may affect product reliability.  
-0.5V to VDD + 0.5 V  
-0.5V to VDDO + 0.5V  
Outputs, VO  
PackageThermal Impedance, θJA 49.8°C/W (0 lfpm)  
StorageTemperature, TSTG -65°C to 150°C  
TABLE 4A. POWER SUPPLY DC CHARACTERISTICS, VDD = VDDA = 3.3V 5ꢀ, VDDO = 3.3V 5ꢀ OR 2.5V 5ꢀ, TA = -40°C TO 85°C  
Symbol Parameter Test Conditions Minimum Typical Maximum Units  
VDD  
VDDA  
VDDO  
IDD  
Core Supply Voltage  
3.135  
3.135  
3.135  
3.3  
3.3  
3.3  
3.465  
3.465  
3.465  
185  
V
V
Analog Supply Voltage  
Output Supply Voltage  
Power Supply Current  
Analog Supply Current  
Output Supply Current  
V
mA  
mA  
mA  
IDDA  
IDDO  
15  
20  
TABLE 4B. LVCMOS/LVTTL DC CHARACTERISTICS, VDD = VDDA = 3.3V 5ꢀ, VDDO = 3.3V 5ꢀ OR 2.5V 5ꢀ, TA = -40°C TO 85°C  
Symbol Parameter  
Test Conditions  
Minimum Typical Maximum Units  
MR, DIV_ SEL0, DIV_SEL1,  
FBDIV_SEL0, FBDIV_SEL1,  
XTAL_SEL, FB_IN, PLL_SEL  
2
VDD + 0.3  
V
V
Input  
VIH  
High Voltage  
REF_IN  
2
V
DD + 0.3  
0.8  
MR, DIV_ SEL0, DIV_SEL1,  
FBDIV_SEL0, FBDIV_SEL1,  
XTAL_SEL, FB_IN, PLL_SEL  
-0.3  
-0.3  
V
Input  
VIL  
Low Voltage  
REF_IN  
1.3  
V
DIV_ SEL0, DIV_SEL1,  
FBDIV_SEL0, FBDIV_SEL1,  
MR, FB_IN  
V
DD = VIN = 3.465V  
150  
5
µA  
µA  
µA  
Input  
IIH  
High Current  
XTAL_SEL, PLL_SEL  
VDD = VIN = 3.465V  
DIV_ SEL0, DIV_SEL1,  
FBDIV_SEL0, FBDIV_SEL1,  
MR, FB_IN  
V
DD = 3.465V,  
VIN = 0V  
-5  
Input  
IIL  
Low Current  
VDD = 3.465V,  
VIN = 0V  
XTAL_SEL, PLL_SEL  
-150  
µA  
V
DD = VIN = 3.465V  
2.6  
1.8  
V
V
V
VOH  
VOL  
Output High Voltage; NOTE 1  
Output Low Voltage; NOTE 1  
VDD = VIN = 2.625V  
0.5  
NOTE 1: Outputs terminated with 50Ω to VDDO/2. See Parameter Measurement Information section,  
"3.3V Output Load Test Circuit".  
87604AGI  
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REV. A APRIL 12, 2005  
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ICS87604I  
LOW VOLTAGE/LOW SKEW, 1:4 PCI/PCI-X  
ZERO DELAY CLOCK GENERATOR  
Integrated  
Circuit  
Systems, Inc.  
TABLE 5. CRYSTAL CHARACTERISTICS  
Parameter  
Test Conditions  
Minimum Typical Maximum  
Units  
Mode of Oscillation  
Frequency  
Fundamental  
10  
38  
50  
MHz  
Ω
Equivalent Series Resistance (ESR)  
Shunt Capacitance  
7
pF  
TABLE 6. PLL INPUT REFERENCE CHARACTERISTICS, VDD = VDDA =VDDO = 3.3V 5ꢀ, TA = -40°C TO 85°C  
Symbol Parameter Test Conditions Minimum Typical Maximum Units  
fREF Reference Frequency  
8.33  
41.67  
MHz  
TABLE 7A. AC CHARACTERISTICS, VDD = VDDA = VDDO = 3.3V 5ꢀ, TA = -40°C TO 85°C  
Symbol Parameter  
Test Conditions  
Minimum  
Typical Maximum Units  
fMAX  
Output Frequency  
166.67  
325  
65  
MHz  
ps  
t(Ø)  
Static Phase Offset; NOTE 1  
Output Skew; NOTE 2, 5  
Cycle-to-Cycle Jitter; 5  
Period Jitter, RMS; NOTE 3, 5, 6  
Slew Rate  
FREF = 25MHz  
0
160  
tsk(o)  
tjit(cc)  
tjit(per)  
tsl(o)  
tL  
ps  
120  
20  
ps  
ps  
1
4
V/ns  
ms  
ps  
PLL Lock Time  
10  
tR / tF  
odc  
Output Rise/Fall Time  
Output Duty Cycle; NOTE 4  
20ꢀ to 80ꢀ  
200  
48  
700  
52  
All parameters measured with feedback and output dividers set to DIV by 12 unless otherwise noted.  
NOTE 1: Defined as the time difference between the input reference clock and the average feedback input signal when the  
PLL is locked and the input reference frequency is stable. Measured at VDD/2.  
NOTE 2: Defined as skew between outputs at the same supply voltage and with equal load conditions.  
Measured at VDDO/2.  
NOTE 3: Jitter performance using LVCMOS inputs.  
NOTE 4: Measured using REF_IN. For XTAL input, refer to Application Note.  
NOTE 5: This parameter is defined in accordance with JEDEC Standard 65.  
NOTE 6: This parameter is defined as an RMS value.  
TABLE 7B. AC CHARACTERISTICS, VDD = VDDA = 3.3V 5ꢀ, VDDO = 2.5V 5ꢀ, TA = -40°C TO 85°C  
Symbol Parameter  
Test Conditions  
Minimum  
Typical Maximum Units  
fMAX  
Output Frequency  
166.67  
160  
50  
MHz  
ps  
t(Ø)  
Static Phase Offset; NOTE 1  
Output Skew; NOTE 2, 5  
Cycle-to-Cycle Jitter; 5  
Period Jitter, RMS; NOTE 3, 5, 6  
Slew Rate  
FREF = 25MHz  
-365  
-105  
tsk(o)  
tjit(cc)  
tjit(per)  
tsl(o)  
tL  
ps  
170  
20  
ps  
ps  
1
4
V/ns  
ms  
ps  
PLL Lock Time  
10  
tR / tF  
odc  
Output Rise/Fall Time  
Output Duty Cycle; NOTE 4  
20ꢀ to 80ꢀ  
200  
48  
700  
52  
See Table 7A for notes.  
87604AGI  
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REV. A APRIL 12, 2005  
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ICS87604I  
LOW VOLTAGE/LOW SKEW, 1:4 PCI/PCI-X  
ZERO DELAY CLOCK GENERATOR  
Integrated  
Circuit  
Systems, Inc.  
PARAMETER MEASUREMENT INFORMATION  
1.65V 5ꢀ  
1.25V 5ꢀ  
2.05V 5ꢀ  
SCOPE  
SCOPE  
V
,
VDD  
VDDA  
,
VDDDDA,VDDO  
VDDO  
Qx  
Qx  
LVCMOS  
LVCMOS  
GND  
GND  
-1.65V 5ꢀ  
-1.25V 5ꢀ  
3.3V OUTPUT LOAD AC TEST CIRCUIT  
3.3V/2.5V OUTPUT LOAD AC TEST CIRCUIT  
VDDO  
VDDO  
2
VDDO  
2
VDDO  
2
Qx  
2
Qx  
tcycle n  
tcycle n+1  
VDDO  
Qy  
2
tjit(cc) = tcycle n –tcycle n+1  
1000 Cycles  
tsk(o)  
CYCLE-TO-CYCLE JITTER  
OUTPUT SKEW  
VDD  
80ꢀ  
tF  
80ꢀ  
2
REF_IN  
FB_IN  
20ꢀ  
20ꢀ  
Clock  
Outputs  
VDD  
2
tR  
t(Ø)  
OUTPUT RISE/FALL TIME  
STATIC PHASE OFFSET  
VDDO  
2
VDDO  
VDDO  
2
2
Qx,  
FB_OUT,  
tPW  
REF_OUT  
tPERIOD  
tPW  
tPERIOD  
odc =  
OUTPUT PULSE WIDTH/PULSE WIDTH PERIOD  
87604AGI  
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REV. A APRIL 12, 2005  
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ICS87604I  
LOW VOLTAGE/LOW SKEW, 1:4 PCI/PCI-X  
ZERO DELAY CLOCK GENERATOR  
Integrated  
Circuit  
Systems, Inc.  
APPLICATION INFORMATION  
POWER SUPPLY FILTERING TECHNIQUES  
As in any high speed analog circuitry, the power supply pins  
are vulnerable to random noise. The ICS87604I provides  
separate power supplies to isolate any high switching  
noise from the outputs to the internal PLL.VDD, VDDA, and VDDO  
should be individually connected to the power supply  
plane through vias, and bypass capacitors should be  
used for each pin. To achieve optimum jitter performance,  
power supply isolation is required. Figure 1 illustrates how  
a 10Ω resistor along with a 10µF and a .01μF bypass  
3.3V  
VDD  
.01μF  
.01μF  
10Ω  
VDDA  
10μF  
capacitor should be connected to each VDDA  
.
FIGURE 1. POWER SUPPLY FILTERING  
CRYSTAL INPUT INTERFACE  
The ICS87604I has been characterized with 18pF parallel resonant crystal and were chosen to minimize the frequency  
resonant crystals. The capacitor values, C1 and C2, shown in ppm error. The optimum C1 and C2 values can be slightly ad-  
Figure 2 below were determined using a 25MHz, 18pF parallel justed for optimum frequency accuracy.  
XTAL_OUT  
C1  
22p  
X1  
18pF Parallel Crystal  
XTAL_IN  
C2  
22p  
Figure 2. CRYSTAL INPUt INTERFACE  
87604AGI  
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REV. A APRIL 12, 2005  
7
ICS87604I  
LOW VOLTAGE/LOW SKEW, 1:4 PCI/PCI-X  
ZERO DELAY CLOCK GENERATOR  
Integrated  
Circuit  
Systems, Inc.  
RELIABILITY INFORMATION  
TABLE 8. θJAVS. AIR FLOW TABLE FOR 28 LEAD TSSOP  
θJA byVelocity (Linear Feet per Minute)  
0
200  
68.7°C/W  
43.9°C/W  
500  
60.5°C/W  
41.2°C/W  
Single-Layer PCB, JEDEC Standard Test Boards  
Multi-Layer PCB, JEDEC Standard Test Boards  
82.9°C/W  
49.8°C/W  
NOTE: Most modern PCB designs use multi-layered boards.The data in the second row pertains to most designs.  
TRANSISTOR COUNT  
The transistor count for ICS87604I is: 5495  
87604AGI  
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REV. A APRIL 12, 2005  
8
ICS87604I  
LOW VOLTAGE/LOW SKEW, 1:4 PCI/PCI-X  
ZERO DELAY CLOCK GENERATOR  
Integrated  
Circuit  
Systems, Inc.  
PACKAGE OUTLINE - G SUFFIX FOR 28 LEAD TSSOP  
TABLE 9. PACKAGE DIMENSIONS  
Millimeters  
SYMBOL  
Minimum  
Maximum  
N
A
28  
--  
1.20  
0.15  
1.05  
0.30  
0.20  
9.80  
A1  
A2  
b
0.05  
0.80  
0.19  
0.09  
9.60  
c
D
E
8.10 BASIC  
0.65 BASIC  
E1  
e
6.00  
6.20  
L
0.45  
0°  
0.75  
8°  
α
aaa  
--  
0.10  
Reference Document: JEDEC Publication 95, MO-153  
87604AGI  
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REV. A APRIL 12, 2005  
9
ICS87604I  
LOW VOLTAGE/LOW SKEW, 1:4 PCI/PCI-X  
ZERO DELAY CLOCK GENERATOR  
Integrated  
Circuit  
Systems, Inc.  
TABLE 10. ORDERING INFORMATION  
Part/Order Number  
ICS87604AGI  
Marking  
Package  
Shipping Packaging  
tube  
Temperature  
-40°C to 85°C  
-40°C to 85°C  
-40°C to 85°C  
-40°C to 85°C  
ICS87604AGI  
ICS87604AGI  
28 Lead TSSOP  
ICS87604AGIT  
ICS87604AGILF  
ICS87604AGILFT  
28 Lead TSSOP  
1000 tape & reel  
tube  
ICS87604AGILF  
ICS87604AGILF  
28 Lead "Lead-Free" TSSOP  
28 Lead "Lead-Free" TSSOP  
1000 tape & reel  
NOTE: Parts that are with an "LF" suffix to the part number are the Pb-Free configuration and are RoHS compliant.  
The aforementioned trademark, HiPerClockS™ is a trademark of Integrated Circuit Systems, Inc. or its subsidiaries in the United States and/or other countries.  
While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Incorporated (ICS) assumes no responsibility for either its use  
or for infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use  
in normal commercial and industrial applications. Any other applications such as those requiring high reliability or other extraordinary environmental requirements are not  
recommended without additional processing by ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS product  
for use in life support devices or critical medical instruments.  
87604AGI  
www.icst.com/products/hiperclocks.html  
REV. A APRIL 12, 2005  
10  
ICS87604I  
LOW VOLTAGE/LOW SKEW, 1:4 PCI/PCI-X  
ZERO DELAY CLOCK GENERATOR  
Integrated  
Circuit  
Systems, Inc.  
REVISION HISTORY SHEET  
Rev  
A
Table  
Page  
5
Description of Change  
Date  
T7A & T7B  
10  
AC Characteristics Tables - corrected note sequence.  
Ordering Information Table - added marking.  
3/18/05  
4/12/05  
A
10  
87604AGI  
www.icst.com/products/hiperclocks.html  
REV. A APRIL 12, 2005  
11  

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