W181-51G Cypress Semiconductor Corp, W181-51G Datasheet
W181-51G
Manufacturer Part Number
W181-51G
Description
Manufacturer
Cypress Semiconductor Corp
Specifications of W181-51G
Lead Free Status / RoHS Status
Not Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
W181-51G
Manufacturer:
HARRIS
Quantity:
141
Features
Key Specifications
Supply Voltages: ........................................... V
Frequency Range: ............................ 28 MHz
Crystal Reference Range.................. 28 MHz
Cycle to Cycle Jitter: ....................................... 300 ps (max.)
Selectable Spread Percentage: ....................1.25% or 3.75%
Output Duty Cycle: ............................... 40/60% (worst case)
Output Rise and Fall Time: .................................. 5 ns (max.)
Cypress Semiconductor Corporation
• Cypress PREMIS™ family offering
• Generates an EMI optimized clocking signal at the out-
• Selectable input to output frequency
• Single 1.25% or 3.75% down or center spread output
• Integrated loop filter components
• Operates with a 3.3V or 5V supply
• Low power CMOS design
• Available in 8-pin SOIC (Small Outline Integrated Cir-
Simplified Block Diagram
PREMIS is a trademark of Cypress Semiconductor Corporation.
Oscillator or
Reference Input
XTAL
Input
put
cuit) or 14-pin TSSOP (Thin Shrink Small Outline Pack-
age select options only)
40 MHz
Max.
X1
X2
3.3 or 5.0V
3.3 or 5.0V
W181
W181
(EMI suppressed)
or V
•
(EMI suppressed)
Spread Spectrum
Output
Spread Spectrum
Output
DD
DD
3901 North First Street
F
F
in
in
= 3.3V±5%
= 5V±10%
75 MHz
40 MHz
Table 1. Modulation Width Selection
Table 2. Frequency Range Selection
FS2
0
0
1
1
Pin Configurations
Peak Reducing EMI Solution
SS%
0
1
•
CLKIN or X1
CLKIN or X1
CLKIN or X1
FS1
0
1
0
1
NC or X2
NC or X2
NC or X2
San Jose
GND
SS%
GND
SS%
GND
SS%
FS2
NC
28 F
38 F
46 F
58 F
NC
F
1.25%
F
3.75%
in
in
W181-01, 02, 03
-01, 51
(MHz)
IN
IN
IN
IN
F
F
1
2
3
4
5
6
7
1
2
3
4
Output
1
2
3
4
out
out
•
TSSOP
38
48
60
75
SOIC
F
F
CA 95134
in
in
W181 Option#
28 F
38 F
–
–
14
13
12
11
10
8
7
6
5
-02, 52
8
7
6
5
9
8
(MHz)
N/A
N/A
IN
IN
SSON#
FS1
VDD
CLKOUT
NC
CLKOUT
FS2
FS1
VDD
CLKOUT
NC
FS1
VDD
NC
NC
F
– 0.625%
F
–1.875%
July 21, 2000, rev. *B
W181-51, 52, 53
in
in
38
48
•
+ 0.625%
+ 1.875% F
Output
408-943-2600
46 F
58 F
-03, 53
(MHz)
W181
N/A
N/A
IN
IN
F
in
in
60
75
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