ICS502M [ICSI]
LOCO⑩ PLL Clock Multiplier; LOCO ™ PLL时钟乘法器
| 型号： | ICS502M |
| 厂家： | 
INTEGRATED CIRCUIT SOLUTION INC |
| 描述： | LOCO⑩ PLL Clock Multiplier |
| 文件： | 总4页 (文件大小：69K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ICS502
LOCO™ PLL Clock Multiplier
Description
Features
• Packaged as 8 pin SOIC or die
The ICS502 LOCO™ is the most cost effective
way to generate a high quality, high frequency
clock output and a reference from a low frequency
crystal or clock input. The name LOCO stands for
LOw Cost Oscillator, as it is designed to replace
crystal oscillators in most electronic systems. Using
Phase-Locked-Loop (PLL) techniques, the device
uses a standard fundamental mode, inexpensive
crystal to produce output clocks up to 160 MHz.
• ICS’ lowest cost PLL clock plus reference
• Zero ppm multiplication error
• Easy to cascade with other 5xx series
• Input crystal frequency of 5 - 27 MHz
• Input clock frequency of 2 - 50 MHz
• Output clock frequencies up to 160 MHz
• Low jitter - 50 ps one sigma
Stored in the chip’s ROM is the ability to generate
6 different multiplication factors, allowing one
chip to output many common frequencies (see
page 2).
• Compatible with all popular CPUs
• Duty cycle of 45/55 up to 160 MHz
• Operating voltages of 3.0 to 5.5V
• Industrial temperature version available
• 25mA drive capability at TTL levels
• Advanced, low power CMOS process
Block Diagram
VDD GND
2
Output
PLL
S1, S0
CLK
Buffer
Clock
Synthesis
and Control
Circuitry
crystal
or clock
X1/ICLK
Crystal
Oscillator
Output
Buffer
REF
X2
MDS 502 D
1
Revision 111000
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126•(408) 295-9800tel • www.icst.com
ICS502
LOCO™ PLL Clock Multiplier
Clock Decoding Table (MHz)
Pin Assignment
S1
0
S0
0
CLK
x2
1
2
3
4
8
7
6
5
X1/ICLK
VDD
X2
S1
0
1
x5
M
M
1
0
x3
1
x3.33
x4
GND
S0
0
Minimum input frequency for all
selections is per table on page 3.
REF
1
1
x2.5
CLK
0 = connect directly to ground.
1 = connect directly to VDD.
M = leave unconnected (floating).
Common Output Frequencies Examples (MHz)
Output
20
25
30
32
33.33
37.5
15
40
20
48
16
50
20
54
60
20
Input
10
10
10
16
10
13.5
1, 0
Selection (S1, S0)
0, 0
1, 1
M, 0
0, 0
M, 1
1, 1
0, 0
M, 0
1, 1
M, 0
Output
64
16
66.66
20
72
24
75
15
80
20
81
27
90
27
100
20
108
27
120
24
135
27
Input
Selection (S1, S0)
1, 0
M, 1
M, 0
0, 1
1, 0
M, 0
M, 1
0, 1
1, 0
0, 1
0, 1
Note that all of the above outputs are achieved by using an inexpensive 10MHz to 27MHz crystal.
Consult MicroClock/ICS on how to achieve other output frequencies.
Pin Descriptions
Number
Name
X1/ICLK
VDD
GND
REF
CLK
S0
Type Description
1
2
3
4
5
6
7
8
I
P
Crystal connection or clock input.
Connect to +3.3V or +5V.
P
Connect to ground.
O
O
I
Buffered crystal oscillator output clock.
Clock output per Table above.
Select 0 for output clock. Connect to GND or VDD.
Select 1 for output clock. Connect to GND or VDD or float.
Crystal connection. Leave unconnected for clock input.
S1
TI
O
X2
Key: I = Input, TI = Tri-Level Input, O = output, P = power supply connection
MDS 502 D
2
Revision 111000
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126•(408) 295-9800tel • www.icst.com
ICS502
LOCO™ PLL Clock Multiplier
Electrical Specifications
Parameter
Conditions
Minimum
Typical
Maximum
Units
ABSOLUTE MAXIMUM RATINGS (stresses beyond these can permanently damage the device)
Supply Voltage, VDD
Inputs
Referenced to GND
Referenced to GND
Referenced to GND
7
VDD+0.5
VDD+0.5
70
V
V
V
C
C
C
C
-0.5
-0.5
0
Clock Output
Ambient Operating Temperature
ICS502MI only
-40
85
Soldering Temperature
Storage temperature
Max of 10 seconds
260
-65
150
DC CHARACTERISTICS (VDD = 5.0V unless otherwise noted)
Operating Voltage, VDD
3
5.5
(VDD/2)-1
0.8
V
V
Input High Voltage, VIH, ICLK only
Input Low Voltage, VIL, ICLK only
Input High Voltage, VIH
ICLK (Pin 1)
(VDD/2)+1
VDD/2
VDD/2
ICLK (Pin 1)
V
S0
2
V
Input Low Voltage, VIL
S0
V
Input High Voltage, VIH
S1
VDD-0.5
2.4
V
Input Low Voltage, VIL
S1
0.5
V
Output High Voltage, VOH
Output Low Voltage, VOL
IOH=-25mA
IOL=25mA
V
0.4
V
IDD Operating Supply Current, 20 MHz crystal No Load, 100MHz
20
±70
270
4
mA
mA
kW
pF
Short Circuit Current
CLK output
Pin 6
On-Chip Pull-up Resistor
Input Capacitance, S1, S0
Pins 6, 7
AC CHARACTERISTICS (VDD = 5.0V unless otherwise noted)
Input Frequency, crystal input
5
27
50
MH z
MH z
MH z
MH z
MH z
MH z
ns
Input Frequency, clock input
2
Output Frequency, VDD = 4.5 to 5.5V
0 C to +70 C
-40 C to +85 C
0 C to +70 C
-40 C to +85 C
0.8 to 2.0V
14
14
14
14
160
140
100
90
Output Frequency, VDD = 3.0 to 3.6V
Output Clock Rise Time
Output Clock Fall Time
Output Clock Duty Cycle
Absolute Clock Period Jitter
One Sigma Clock Period Jitter
1
1
2.0 to 0.8V
ns
at VDD/2
45
49 to 51
±120
50
55
%
Deviation from mean
ps
ps
MDS 502 D
3
Revision 111000
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126•(408) 295-9800tel • www.icst.com
ICS502
LOCO™ PLL Clock Multiplier
External Components / Crystal Selection
The ICS502 requires a 0.01µF decoupling capacitor to be connected between VDD and GND. It must be
connected close to the ICS502 to minimize lead inductance. No external power supply filtering is required
for this device. A 33Wterminating resistor can be used next to the CLK pin. The total on-chip capacitance
is approximately 13 pF, so a parallel resonant, fundamental mode crystal should be used. For crystals with
a specified load capacitance greater than 13 pF, crystal capacitors should be connected from each of the
pins X1 and X2 to Ground as shown in the Block Diagram on page 1. The value (in pF) of these crystal
caps should be = (C -13)*2, where C is the crystal load capacitance in pF. These external capacitors are
L
L
only required for applications where the exact frequency is critical. For a clock input, connect to X1 and
leave X2 unconnected (no capacitors on either).
Package Outline and Package Dimensions
8 pin SOIC
E
H
Inches
Millimeters
Min Max
0.055 0.068 1.397 1.7272
Pin 1
Symbol Min
Max
A
b
0.013 0.019 0.330
0.185 0.200 4.699
0.150 0.160 3.810
0.225 0.245 5.715
0.483
5.080
4.064
6.223
D
E
H
e
h x 45°
D
.050 BSC
0.015
0.01
1.27 BSC
A
Q
h
0.381
0.254
c
Q
0.004
0.102
b
e
Ordering Information
Part/Order Number
ICS502M
Marking
ICS502M
ICS502M
ICS502I
ICS502I
Package
8 pin SOIC
8 pin SOIC on tape and reel
8 pin SOIC
Temperature
0 to 70 C
0 to 70 C
ICS502MT
ICS502MI
ICS502MIT
-40 to +85 C
8 pin SOIC on tape and reel -40 to +85 C
While the information presented herein has been checked for both accuracy and reliability, ICS/MicroClock 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. No other circuits, patents, or licenses are implied. This product is intended for use in normal
commercial applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are not
recommended without additional processing by ICS/MicroClock. ICS/MicroClock reserves the right to change any circuitry or specifications without notice. ICS/MicroClock
does not authorize or warrant any ICS/MicroClock product for use in life support devices or critical medical instruments.
LOCO is a trademark of ICS
MDS 502 D
4
Revision 111000
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126•(408) 295-9800tel • www.icst.com
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