How to Order: Part Number Example
Group P
Spread Types and %
Down
Available from D0.25 (-0.25%) to D3.75 (-3.75%).
Spread
Center
Spread
Available from C0.125 (±0.125%) to C1.875
(±1.875%).
3HM57-B-100.000P-D3
Frequency Stability Code
“A” ~”F”. See table above
Frequency (MHz)
EMI Reduction Data 125 MHz at various spread percentages. Modulation Carrier Frequency: 48.8 KHz
Group: P
SST Fout = 125 MHz
28
25
22
19
16
13
10
7
1
3
5
7
9
11
13
15
17
19
HARMONIC
0.50%
1%
1.50%
2%
3%
3.5%
Total% ∗ Frequency(MHz)
Main mode: EMI reduction (dB) = 10Log(
3rd Harmonic: EMI reduction (dB) = 10Log(
5th Harmonic: EMI reduction (dB) = 10Log(
)
0.12
Total%∗ Frequency(MHz) ∗3
)
0.12
Total%∗ Frequency(MHz) ∗5
)
0.12
For more technical information please visit www.mercury-crystal.com and download our
technical note TN-020 (Title: “Low EMI Spread Spectrum Clock Oscillators”).
Other Available Packages:
HM14 (full size 4 pin DIPs),
HM8 (half size 4 pin DIPs),
HM42 (9.6x11.4x2.5 mm FR4 base leadless SMDs)
HM44 (9.6x11.4x4.7 mm FR4 base leadless SMDs)
Please visit www.mercury-crystal.com
Page 3 of 4
May. 19, 2005 Rev. G
MERCURY [ MERCURY UNITED ELECTRONICS INC ]
