DS4625P+150/200 [MAXIM]
3.3V Dual-Output LVPECL Clock Oscillator; 3.3V双输出LVPECL时钟振荡器
| 型号： | DS4625P+150/200 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 3.3V Dual-Output LVPECL Clock Oscillator |
| 文件： | 总6页 (文件大小：130K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-4558; Rev 0; 4/09
3.3V Dual-Output LVPECL Clock Oscillator
DS4625
General Description
Features
The DS4625 is a dual-output, low-jitter clock oscillator
capable of producing frequency output pair combina-
tions ranging from 100MHz to 625MHz. The device
combines an AT-cut crystal, an oscillator, and a low-
noise phase-locked loop (PLL) in a 5.0mm x 3.2mm
surface-mount LCCC package. Standard frequency
options are listed in the Ordering Information/Selector
Guide table. For custom frequency options, contact the
factory at: Custom.Oscillators@maxim-ic.com.
♦ Standard Clock Output Frequencies: 100MHz,
125MHz, 150MHz, 156.25MHz, and 200MHz
♦ Phase Jitter < 0.7ps RMS (typical) from 12kHz to
20MHz
♦ LVPECL Output
♦ +3.3V 10ꢀ Operatinꢁ Voltaꢁe
♦ -40°C to +70°C Temperature Ranꢁe
♦ Excellent Power-Supply Noise Rejection
♦ 5.0mm x 3.2mm Ceramic LCCC Packaꢁe
♦ Output Enable/Disable
The DS4625 provides dual, low-voltage, positive emit-
ter-coupled logic (LVPECL) clock output drivers. The
output drivers can be enabled and disabled through
the OE pin, which is an active-high CMOS input that
has an internal pullup resistor. When high, both output
pairs are enabled.
The device operates from a single +3.3V 10ꢀ supply.
The operating temperature range is -40°C to +70°C.
Applications
XGMII Clock Oscillator
InfiniBand™
SAS/SATA
®
PCIe
1GbE/10GbE
Ordering Information/Selector Guide
FREQUENCY (OP1:ON1)
FREQUENCY (OP2:ON2)
TOP
MARK
PART
TEMP RANGE
PIN-PACKAGE
(MHz) (f )*
C
(MHz) (f )*
C
DS4625P+100/150
DS4625P+125/125
DS4625P+125/156
DS4625P+150/150
DS4625P+150/200
-40°C to +70°C
-40°C to +70°C
-40°C to +70°C
-40°C to +70°C
-40°C to +70°C
100.000
125.000
125.000
150.000
150.000
150.000
125.000
156.250
150.000
200.000
10 LCCC
10 LCCC
10 LCCC
10 LCCC
10 LCCC
6AC
6BB
6BD
6CC
6CE
+Denotes a lead(Pb)-free/RoHS-compliant package. The lead finish is JESD97 category e4 (Au over Ni) and is compatible with both
lead-based and lead-free soldering processes.
*Standard frequency options. Contact the factory at Custom.Oscillators@maxim-ic.com for custom frequencies.
Pin Confiꢁuration and Typical Application Circuit appear at end of data sheet.
InfiniBand is a trademark and service mark of the InfiniBand Trade Association.
PCIe is a registered trademark of PCI-SIG Corp.
________________________________________________________________ Maxim Inteꢁrated Products
1
For pricinꢁ, delivery, and orderinꢁ information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
3.3V Dual-Output LVPECL Clock Oscillator
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to ground unless otherwise noted.)
Voltage Range on Any Pin Relative to Ground......-0.3V to +4.0V
Operating Temperature Range ...........................-40°C to +70°C
Junction Temperature......................................................+150°C
θ
...................................................................+90°C/W (Note 1)
JA
Storage Temperature Range...............................-55°C to +85°C
Soldering Temperature (3 passes max of reflow)......Refer to the
IPC/JEDEC J-STD-020 Specification.
Note 1: Package thermal resistances were obtained using a two-layer board. For detailed information on package thermal consider-
ations, refer to www.maxim-ic.com/thermal-tutorial.
DS4625
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
CONDITIONS
MIN
2.97
0.7 x
TYP
MAX
UNITS
Operating Voltage Range
V
3.3
3.63
V
CC
Input-Voltage High (OE)
Input-Voltage Low (OE)
V
V
V
V
IH
CC
V
CC
0.3 x
V
0
IL
V
CC
ELECTRICAL CHARACTERISTICS
(V = +2.97V to +3.63V, T = -40°C to +70°C, typical values are at V = +3.3V and T = +25°C, unless otherwise noted.) (Notes 2, 3)
CC
A
CC
A
PARAMETER
SYMBOL
CONDITIONS
LVPECL, output unloaded
LVPECL, output loaded
MIN
TYP
65
MAX
90
UNITS
mA
I
CC_PU
Operating Current
I
120
80
140
115
mA
CC_PL
I
V
= V
mA
CC_OEZ
OE
IL
f
f
OUT1
OUT2
Output Frequency
Startup Time
V
= V
f
MHz
ms
OE
IH
C
t
(Note 4)
1.0
START
Temperature, aging, load, supply, and
initial tolerance (Note 5)
Frequency Stability
ꢀf
f
-50
-35
+50
+35
ppm
TOTAL/ C
Frequency Stability Over
Temperature with Initial
Tolerance
ꢀf
/f
V
CC
= +3.3V
ppm
TEMP C
Initial Tolerance
ꢀf
/f
V
V
= +3.3V, T = +25°C
20
1
ppm
INITIAL C
CC
A
Frequency Change Due to ꢀV
ꢀf
= +3.3V 10%, T = +25°C
-3
+3
ppm/V
CC
VCC
CC
A
Frequency Change Due to Load
Variation
ꢀf
/f
10% variation in termination resistance
ppm
LOAD C
Aging (15 Years)
ꢀf
/f
-7
+7
ppm
AGING C
OE Pullup Resistance
R
T
A
= +25°C
70
100
130
kꢀ
PU
2
_______________________________________________________________________________________
3.3V Dual-Output LVPECL Clock Oscillator
DS4625
ELECTRICAL CHARACTERISTICS (continued)
(V = +2.97V to +3.63V, T = -40°C to +70°C, typical values are at V = +3.3V and T = +25°C, unless otherwise noted.) (Notes 2, 3)
CC
A
CC
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Output connected to 50ꢀ at PECL_BIAS at
- 2.0V
V
-
V
0.88
-
CC
CC
Output High Voltage
Output Low Voltage
V
V
OH
V
CC
1.085
Output connected to 50ꢀ at PECL_BIAS at
- 2.0V
V
CC
-
V
CC
-
V
V
V
OL
V
CC
1.825
1.62
Output connected to 50ꢀ at PECL_BIAS at
- 2.0V
Differential Output Voltage
|V
|
0.595
0.710
OD
V
CC
Output Rise Time
Output Fall Time
Duty Cycle
t
20% to 80%
80% to 20%
200
200
ps
ps
%
R
t
F
D
45
55
CYCLE
Propagation Delay from OE
Going Low to Output High
Impedance
t
t
(See Figure 2)
100
ns
PAZ
Propagation Delay from OE
Going High to Output Active
(See Figure 2)
100
ns
ps
ps
PZA
Integrated phase RMS, 12kHz to 20MHz,
Jitter
J
0.7
0.1
RMS
V
CC
= +3.3V, T = +25°C
A
Accumulated Deterministic
Jitter Due to Reference Spurs
125.00MHz output, V = +3.3V,
CC
T
A
= +25°C
10kHz
100kHz
200kHz
1MHz
12.9
26.3
20.1
6.4
ps
ps
ps
ps
Accumulated Deterministic
Jitter Due to Power-Supply Noise
(P-P) (Note 6)
Note 2: Limits at -40°C are guaranteed by design and are not production tested.
Note 3: AC parameters are guaranteed by design and not production tested.
Note 4: Startup time is from V
= V
until PLL locks to the crystal oscillator output.
CC
CCMIN
Note 5: Frequency stability is calculated as: Δf
= Δf
+ Δf
x (3.3 x 10ꢀ) + Δf
+ Δf
.
TOTAL
TEMP
VCC
LOAD
AGING
Note 6: Supply-induced jitter is the deterministic jitter as measured on a LeCroy SDA11000 measured with a 50mV
sine wave
P-P
forced on V
.
CC
SINGLE-SIDEBAND PHASE NOISE
SSB PHASE NOISE (dBc/Hz) (TYPICAL, +25°C, +3.3V)
UNITS
OFFSET
100Hz
1kHz
f
C
= 100MHz
-71
f
C
= 125MHz
-85
f
C
= 150MHz
-84
f
C
= 156.25MHz
-79
f
C
= 200MHz
-85
-116
-117
-116
-115
-113
10kHz
100kHz
1MHz
-119
-118
-116
-117
-113
dBc/Hz
-126
-125
-122
-123
-120
-143
-142
-141
-140
-139
10MHz
20MHz
-151
-149
-149
-148
-149
-151
-150
-149
-149
-150
_______________________________________________________________________________________
3
3.3V Dual-Output LVPECL Clock Oscillator
Typical Operating Characteristics
(T = +25°C, unless otherwise noted.)
A
f DEVIATION vs. V
I
vs. V
CC
f DEVIATION vs. TEMPERATURE
C
C
CC
CC
3.0
2.5
2.0
1.5
1.0
0.5
0
140
130
120
110
100
90
50
40
DS4625
I
CC_PU
30
20
10
ONE OUTPUT LOADED
0
-10
-20
-30
-40
-50
80
I
CC_PL
70
60
50
3.0
3.1
3.2
3.3
V
3.4
3.5
3.6
3.0
3.1
3.2
3.3
3.4
3.5
3.6
-40
-20
0
20
40
60
(V)
V
(V)
TEMPERATURE (°C)
CC
CC
Pin Description
PIN
NAME
FUNCTION
1
2, 3
4
OE
Active-High Output Enable. Has an internal pullup resistor (R ).
PU
GND
OP1
ON1
Ground
Positive Output 1 for LVPECL
Negative Output 1 for LVPECL
Supply Voltage Input
5
6
V
CC
A1, A2
A3
A4
N.C.
OP2
ON2
No Internal Connection. Must be connected to ground.
Positive Output 2 for LVPECL
Negative Output 2 for LVPECL
Exposed Pad. The exposed pad must be used for thermal relief. This pad must be connected to
ground.
—
EP
4
_______________________________________________________________________________________
3.3V Dual-Output LVPECL Clock Oscillator
DS4625
V
CC
V
CC
R
PU
OE
X1
X2
X0
PLL
OP1
LC-VCO
DIV M
DIV N
LVPECL
PFD
LPF
ON1
OP2
ON2
DIV P
DS4625
LVPECL
GND
Figure 1. Block Diagram
0.7 x V
CC
OE
0.3 x V
CC
t
PZA
t
PAZ
OP_
ON_
PECL_BIAS
PECL_BIAS
PECL_BIAS
PECL_BIAS
Figure 2. LVPECL Output Timing Diagram When OE is Enabled and Disabled
_______________________________________________________________________________________
5
3.3V Dual-Output LVPECL Clock Oscillator
Pin Configuration
Detailed Description
The DS4625 is a dual-output, low-jitter clock oscillator
that produces frequency output pair combinations as
shown in the Ordering Information/Selector Guide table.
The phase relationship between the outputs is not guar-
anteed. The device combines an AT-cut, fundamental-
mode crystal, an oscillator, and a low-noise PLL in a
5.0mm x 3.2mm surface-mount LCCC package.
TOP VIEW
N.C.
A1
N.C.
A2
+
DS4625
OE
GND
GND
1
6
5
4
V
CC
The DS4625 provides dual LVPECL clock output dri-
vers. The output drivers can be enabled and disabled
through the OE pin. The OE pin is an active-high CMOS
input that has an internal pullup resistor. When OE is
high, both output pairs are enabled.
2
3
ON1
OP1
DS4625
*EP
A3
Chip Information
A4
PROCESS: Bipolar SiGe
OP2
ON2
Package Information
For the latest package outline information and land patterns, go
to www.maxim-ic.com/packaꢁes.
(5.00mm × 3.20mm × 1.49mm)
*EXPOSED PAD
PACKAGE TYPE PACKAGE CODE DOCUMENT NO.
10 LCCC
L1053+H2
21-0389
Typical Application Circuit
V
OP1
CC
0.1μF
0.01μF
50Ω
PECL_BIAS AT V - 2.0V
CC
DS4625
50Ω
ON1
OP2
OE
50Ω
50Ω
PECL_BIAS AT V - 2.0V
CC
GND
ON2
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2009 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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