2.5V operation LVDS SAW Oscillator
EG-2121CA-L
♦ Features
• Generates high frequency clock from a high stability SAW (surface acoustic wave) resonator.
• 2.5V-LVDS output.
• Very low jitter/low phase noise.
• Small SMD in 7x5mm, Max1.4mm height, ceramic package.
♦ Applications
• Gigabit Ethernet, Fibre channel, Infini Band, PCI-express, Rapid IO, Hyper Transport, Memory clock, CPU clock
♦ Absolute Maximum Ratings
Item
Supply Voltage
Storage temperature
Solder heat resistance
Symbol
Unit
MIN.
TYP.
MAX.
Condition
VCC
Tstg
Tsol
V
°C
-0.5
-40
+4.0
+100
VCC – GND
Stored as bare product
Max. 240°C x Max. 10s x 2 times
♦ Operating range
Item
Symbol
Unit
MIN.
TYP.
2.5
MAX.
Condition
Supply voltage
Operating temperature
VCC
Topr
V
°C
2.375
0
2.625
+70
P version
-5
+85
R version
Output load
RL
Ω
100
Differential resistor
♦ Frequency characteristics
(VCC=2.375 to 2.625,GND=0.0V,Load=100Ω)
Item
Symbol
Unit
MIN.
TYP.
MAX.
Condition
Output frequency Range
Frequency Stability
fosc
df/f0
MHz
ppm
53.125
-100
-50
700
+100
+50
H version, *1
G version, *1
*1 This includes initial frequency tolerance, temperature, supply voltage variation and loading variation. Please refer to Part Numbering Guide (page3).
♦ Electrical characteristics
(VCC=2.375 to 2.625,GND=0.0V,Load=100Ω)
Item
Symbol
Unit
MIN.
TYP.
MAX.
Condition
Start up time
Current consumption
Tosc
IOP
ms
mA
10
30
35
t=0 at VCC=2.375V
fosc<=500MHz
fosc>500MHz
20
25
OE High level input voltage
OE Low level input voltage
OE High level input current
OE Low level input current
Differential output voltage
Change to VOD
Offset Voltage
Change to VOS
Duty
VIH
VIL
IIH
V
V
0.7VCC
0.3VCC
1
-10
454
50
1.375
150
52
uA
uA
mV
mV
V
OE= VCC
OE=GND
VOD1 ,VOD2
dVOD= VOD1 - VOD2
VOS1 ,VOS2
dVOS= VOS1 - VOS2
V version: <=175MHz
53.125M to 350MHz
>350M
IIL
-100
247
VOD
dVOD
VOS
dVOS
tw/t
350
1.125
1.25
mV
%
48
45
40
at outputs crossing point
55
60
Output Rise time
Output Fall time
Phase Jitter *2
tTLH
tTHL
TPJ
ps
ps
UI
ps
ps
ps
ps
400
400
20-80% of VOD
80-20% of VOD
0.044x10-3
53.125 to 700MHz
@156.25MHz
σ of Random Jitter
Peak to Peak of jitter distribution
σ of Total jitter distribution
Offset =12KHz to 20MHz
0.29
3
25
4
1
4
40
5
Period Jitter *3
n=50000 samples
tRJ
tp-p
tacc
Accumulated Jitter *3
n=2 to 50000 cycles
*2 Measured by SSB phase noise test equipment.
*3 Measured by Time interval analyzer or oscilloscope.
EPSON ELECTRONICS AMERICA, INC.
www.eea.epson.com
EG2121 LVDS Rev 1.4 35D
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