3HM57-C-220.000P-D3.5 [MERCURY]
Oscillator;
| 型号： | 3HM57-C-220.000P-D3.5 |
| 厂家： | 
MERCURY UNITED ELECTRONICS INC |
| 描述： | Oscillator |
| 文件： | 总4页 (文件大小：176K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
3HM57 Group “P”
±100 ps Low jitter
A DROP-IN REPLACEMENT SOLUTION FOR YOUR EMI / EMC COMPLIANCE PROBLEM.
WHY RE-LAYOUT THE BOARD WHEN YOU CAN HAVE DROP-IN SOLUTION?
The principle sources of the EMI problem
come from the system clocks. Therefore, rather
than patch the problem with ferrite beads, EMI
filters, ground plane and metal shielding, the most
efficient and economic way to reduce the peak
radiation energy is to use the low EMI clock
oscillator.
Compared with the conventional clock
oscillators, Mercury HM57 series spread spectrum
(dithered) clock oscillators can reduce EMI as
much as 12 dB.
3HM57 reduces your EMI
and shorten your time to market.
Applications
◘ Printers; Multiple function printers (MPCs)
◘ Digital copiers; PDAs
◘ Networking; LAN / WAN; Routers
◘ Storage systems (CD-ROM, VCD, DVD and HDD)
◘ Scanner; Modems; projectors
◘ Hand-held ID readers
◘ Embedded systems; Electrical musical instrument
◘ Automotive; GPS car navigation systems
◘ LCD PC monitors / LCD TVs
◘ ADSL; PCMCIA
◘ Still Digital cameras (SDCs)
Spread Spectrum Clock (SSC):
Unlike the conventional clock, the
mode energy of a spread spectrum
clock is spread over a wider
bandwidth, resulting from the
frequency modulation technique. The
Modulation Types Output amplitude (dB) vs frequency span (MHz)
Down spread “D”. “D1” as an example
Center spread “C”. “C0.5” as an example
Conventional
Clock
Conventional
Clock
dB
modulation carrier frequency is in the
KHz range which makes the
EMI reduction
EMI reduction
Spread
spectrum
clock
modulation process transparent to the
oscillator frequency. The controlled
modulation process can be on all of
one side of the nominal frequency
(down spread) or 50% up and 50%
down (center spread). The down
spread is preferred if over-clocking is
a problem to the system.
Frequency
fo=fc
fo - (fo*0.5%)
fo + (fo*0.5%)
fc
fo - (fo*1%)
MERCURY
www.mercury-crystal.com
Taiwan: TEL (886)-2-2406-2779, FAX (886)-2-2496-0769, e-mail: sales-tw@mercury-crystal.com
U.S.A.: TEL (1)-909-466-0427, FAX (1)-909-466-0762, e-mail: sales-us@mercury-crystal.com
Page 1 of 4
May. 19, 2005 Rev. G
General Specifications: at Ta=+25°C, CL=15 pF
Mercury Model
3HM57 (spec. for group “P”)
7.00±0.15
Frequency Range
Spread Type and %
13.0 ~220.0 MHz
Total %
0.25%
0.5%
0.75%
1.25%
2%
Down Spread (D) Center Spread (C)
-0.25% (D0.25)
-0.5% (D0.5)
-0.75% (D0.75)
-1.25% (D1.25)
-2% (D2)
±0.125% (C0.125)
±0.25% (C0.25)
±0.375% (C0.375)
±0.625 (C0.625)
±1.0 (C1.0)
Spread Percentage(1)
(Part number suffix)
Tolerance: ±30% of the
total %
2.5%
3%
-2.5% (D2.5)
-3% (D3)
±1.25 (C1.25)
±1.5 (C1.5)
0.6
1.4
3.5%
3.75%
-3.5% (D3.5)
-3.75% (D3.75)
±1.75 (C1.75)
±1.875 (C1.875)
EMI Reduction
(Reduction is applied to the
entire frequency spectrum)
EMI reduction (dB) = 10Log("Total
%"x"SSC Frequency(MHz)"/0.12).
See 125 MHz example on the next page.
5.08[0.200]
Modulation Carrier
Frequency (Dither rate)
Output Logic
25.3 KHz min.; 58.6 KHz max.
Frequency dependent. Call for details.
CMOS Square Wave
Input Voltage (VDD)
VDD = +3.3 V D.C. ±5%
Commercial (0°C to +70°C):
“A”: ±25 ppm ; “B’: ±50 ppm; “C”:±100 ppm
Suggested Land Pattern
2.2[0.086]
Frequency Stability
(exclude modulation)
Industrial (-40°C to +85°C):
“D”: ±25 ppm ; “E’: ±50 ppm; “F”:±100 ppm
Output Voltage “High”; “1”
Output Voltage “Low”; “0”
Rise Time / Fall Time
2.4 V min.;(at 80% VDD)
0.4 V max. (at 20% VDD)
1.2 n sec. max. (20% VDD ↔ 80% VDD)
15 pF
Load
5.08[0.200]
Start-up Time
Current Consumption
Duty Cycle
Cycle-to-cycle Jitter
Output Impedance
Static Discharge Voltage
Storage Temperature
Aging
2 ms typical; 5 ms max.
25 mA typical; Frequency dependent
50%±5%. ( CL=15 pF ;at 50% VDD)
±100 ps typical;±150 ps max.
40 ohms typical
>2000 V (per MIL-STD-883, method 3015)
-65°C to +150°C
Pad Connections
Spread
3 Spectrum
Output
Do not make
connection to this pad.
1
2
Ground
4 +3.3 V D.C.
±5 ppm per year max.; Ta=+25°C
No Option available. Do not make connection to this pad
Option on Pad 1
Packaging
16 mm tape and reel. 1000 pcs per reel
Environmental Performance Specifications
Green Requirement
Storage temp. range
Humidity
Hermetic seal
Solderability
Reflow
RoHS Compliant and Pb (lead) free
-55 to +125°C
85% RH, 85°C, 48 hours
Leak rate 2x10-8 ATM-cm3/sec max.
MIL-STD-202F method 208E
260°C for 10 sec.
Vibration
MIL-STD-202F method 204, 35G, 50 to 2000 Hz
Shock
MIL-STD-202F method 213B, test condition. E, 1000GG ½ sine wave
Page 2 of 4
May. 19, 2005 Rev. G
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
Instantaneous Frequencies (Example of 100 MHz)
If over-clocking is a problem to your system please choose down spread
Down Spread
Center Spread
Instantaneous Frequency
Instantaneous Frequency
Total
Spread %
min.
max.
min.
max.
Down Range Up Range
Down Range
-0.5 %
-2500 ppm
99.750000
-1.0 %
Up Range
+0.5%
+2500 ppm
100.250000
+1.0%
- 1%
0%
0 ppm
0.5 %
2 %
-5,000 ppm
99.500000
- 2.0%
100.000000
0%
-20,000 ppm
98.000000
- 3.0%
0 ppm
100.000000
0%
-10,000 ppm
99.000000
-1.5 %
+10,000 ppm
101.000000
+1.5%
3 %
-30,000 ppm
97.000000
0 ppm
100.000000
-15,000 ppm
98.500000
+15,000 ppm
101.500000
Jitter
3HM57-B-50.000P
Cycle-to-cycle Jitter: 32.59 ps min; 39.76 ps max.
Sample rate: 20.0 G Sa/sec.; No. of samples: 10,000; Edge Direction: Rising edges
For more technical information please visit www.mercury-crystal.com and download our technical note TN-020
(Title: “Low EMI Spread Spectrum Clock Oscillators”).
Page 4 of 4
May. 19, 2005 Rev. G
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