3HM57-BT-160.000R-C1.5 [MERCURY]
Oscillator;
| 型号： | 3HM57-BT-160.000R-C1.5 |
| 厂家： | 
MERCURY UNITED ELECTRONICS INC |
| 描述： | Oscillator |
| 文件： | 总5页 (文件大小：255K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
3HM57 Group “R”
A DROP-IN REPLACEMENT SOLUTION FOR YOUR
EMI / EMC COMPLIANCE PROBLEM
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. The beauty is it is a drop-in
replacement for your existing 5x7 clock oscillator.
No need to re-spin the board.
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)
Modulation Types Output amplitude (dB) vs frequency span (MHz)
Spread Spectrum Clock (SSC):
Unlike the conventional clock, the
mode energy of a spread spectrum
Down spread “D”. “D1” as an example
Center spread “C”. “C0.5” as an example
clock is spread over a wider
bandwidth, resulting from the
Conventional
Clock
Conventional
Clock
dB
frequency modulation technique. The
modulation carrier frequency is in the
KHz range which makes the
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
EMI reduction
EMI reduction
Spread
spectrum
clock
Frequency
fo=fc
a problem to the system.
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 5
April. 19. 2005 Rev. G
General Specifications: at Ta=+25°C, CL=15 pF
Mercury Model
Frequency Range
Spread Type
3HM57 Group “R”
5.0 ~160.0 MHz
Total % Down Spread (D) Center Spread (C)
7.00±0.15
Spread Percentage
(Part number suffix)
(tolerance : ±2% of the total %
EMI Reduction
(Reduction is applied to the
entire spectrum)
1%
3%
-1% (D1)
-3% (D3)
±0.5 (C0.5)
±1.5 (C1.5)
-9 dBc min. 100 MHz at C0.5
-15 dBc min. 100 MHz at C1.5
With respect to the dB level when no modulation.
0.6
1.4
Modulation Carrier Frequency
(Dither rate)
6.9 KHz min.; 55.5 KHz max.;
Frequency dependent. Call for details.
Output Logic
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
Frequency Stability
(exclude modulation)
Industrial (-40°C to +85°C):
5.08[0.200]
“D”: ±25 ppm ; “E’: ±50 ppm; “F”:±100 ppm
Output Voltage “High”; “1”
Output Voltage “Low”; “0”
Rise Time / Fall Time
Load
2.0 V min.; 3.2 V typical (at 90% VDD)
0.8 V max. ; 0.2 V typical (at 10% VDD)
4 n sec. max. (10% VDD ↔ 90% VDD)
15 pF
Suggested Land Pattern
Start-up Time
2 ms typical; 5 ms max.
2 ms max.
2.2[0.086]
Stabilization Time
10.0 MHz: 7 mA; 32.768 MHz: 8 mA
75.0 MHz: 17 mA; 125 MHz: 18 mA
Current Consumption
Duty Cycle
50%±5%. ( CL=15 pF ;at 50% VDD)
±250 ps typical; ±300 ps max.
40 ohms typical
>2000 V (per MIL-STD-883, method 3015)
-65°C to +150°C
Cycle-to-cycle Jitter
Output Impedance
Static Discharge Voltage
Storage Temperature
Aging
5.08[0.200]
±5 ppm per year max.; Ta=+25°C
Pad Connections
Packaging
16 mm tape and reel. 1000 pcs per reel
1
2
Tri-State
Ground
3
4
SSC Output
+3.3 V D.C.
Output is high impedance when taken low.
Output enable /disable time: 100 ns max.
Pin 1 Function
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 5
Apr. 19, 2005 Rev. G
How to Order: Part number Example
Spread Types and %
Down Spread
“T”:Tri-State
D1
D3
-1%
-3%
Center Spread
Group
C0.5
C1.5
±0.5%
±1.5%
3HM57-BT-32.768R-C0.5
Frequency (MHz)
Frequency Stability Code
“A” ~”F”. See table above
Other Packages Available:
HM53: 5x3.2x1.2 mm 4 pad ceramic SMDs
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
Instantaneous Frequencies (Example of 100 MHz)
If over-clocking is a problem to your system please choose down spread
Down Spread
Instantaneous Frequency
Center Spread
Instantaneous Frequency
Total Spread
%
min.
Down Range
- 1%
-10,000 ppm
99.000000
- 3.0%
-30,000 ppm
97.000000
max.
Up Range
min.
Down Range
-0.5 %
-5000 ppm
99.500000
-1.5 %
-15,000 ppm
98.500000
max.
Up Range
+0.5%
+5000 ppm
100.500000
+1.5%
+15,000 ppm
101.500000
0%
0 ppm
100.000000
0%
0 ppm
100.000000
1 %
3 %
Page 3 of 5
Apr. 19, 2005 Rev. G
3HM57-32.768 at No Modulation and at Center Spread 1.5%: 13.1 dBc EMI reduction
-9.9 dB
-23.0 dB
No Modulation
C1.5
EMI Reduction of 3HM57 100 MHz at C0.5 and C1.5 (main mode only)
Modulation Carrier Frequency = 34.687 KHz
C0.25 (center spread ±0.25%)
No modulation
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-3.33dBm
-11.19dBm
96
97
98
99
100
101
102
103
104
96
97
98
99
100
101
102
103
104
Frequency[MHz]
Frequency[MHz]
C0.5 (center spread ±0.5%)
C1.5 (center spread ±1.5%)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-18.54dBm
-1
-12.98dBm
96
97
98
99
100
101
102
103
104
96
97
98
99
100
101
102
103
104
Frequency[MHz]
Frequency[MHz]
Page 4 of 5
Apr. 19, 2005 Rev. G
EMI Reduction of 3HM57 100 MHz at C0.5 and C1.5 (the whole spectrum)
TS305BSpectrumAnalyzer Waveform@SSC=+/-0.25%
No Modulation
C0.25 (center spread ±0.25%)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-3.21
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-10.04
-11.21
-20.15
-24.25
-25.40
-20.19
-35.04
-33.37
-37.72
-38.87
-48.97
0
100 200 300 400 500 600 700 800 900 1000 1100 1200
Frequency[MHz]
0
100 200 300 400 500 600 700 800 900 1000 1100 1200
Frequency[MHz]
C0.5 (center spread ±0.5%)
C1.5 (center spread ±1.5%)
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-12.80
-24.45
-19.46
-29.09
-36.75
-41.22
-41.23
-42.47
-46.35
-48.47
-51.40
-58.77
0
100 200 300 400 500 600 700 800 900 1000 1100 1200
Frequency[MHz]
0
100 200 300 400 500 600 700 800 900 1000 1100 1200
Frequency[MHz]
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 5 of 5
Apr. 19, 2005 Rev. G
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