EPSON EG-2121CA-L

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
Symbol
Supply Voltage
Storage temperature
Solder heat resistance
VCC
Tstg
Tsol
♦ Operating range
Item
TYP.
MAX.
Condition
V
-0.5
°C
-40
Max. 240°C x Max. 10s x 2 times
MIN.
+4.0
+100
VCC – GND
Stored as bare product
Condition
Symbol
Unit
MIN.
TYP.
MAX.
VCC
Topr
V
°C
2.375
0
-5
2.5
2.625
+70
+85
RL
Ω
Symbol
Unit
MIN.
fosc
df/f0
MHz
ppm
53.125
-100
-50
Supply voltage
Operating temperature
Output load
♦ Frequency characteristics
Item
Unit
Output frequency Range
Frequency Stability
100
P version
R version
Differential resistor
(VCC=2.375 to 2.625,GND=0.0V,Load=100Ω)
MAX.
Condition
TYP.
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
Item
Symbol
Unit
Start up time
Current consumption
Tosc
IOP
ms
mA
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
at outputs crossing point
VIH
VIL
IIH
IIL
VOD
dVOD
VOS
dVOS
tw/t
V
V
uA
uA
mV
mV
V
mV
%
Output Rise time
Output Fall time
Phase Jitter *2
Offset =12KHz to 20MHz
Period Jitter *3
n=50000 samples
Accumulated Jitter *3
n=2 to 50000 cycles
tTLH
tTHL
TPJ
ps
ps
UI
ps
ps
ps
ps
tRJ
tp-p
tacc
MIN.
(VCC=2.375 to 2.625,GND=0.0V,Load=100Ω)
MAX.
Condition
TYP.
10
30
35
20
25
t=0 at VCC=2.375V
fosc<=500MHz
fosc>500MHz
0.7VCC
-100
247
350
1.125
1.25
0.3VCC
1
-10
454
50
1.375
150
52
55
60
400
400
48
45
40
0.044x10
0.29
3
25
4
-3
1
4
40
5
OE= VCC
OE=GND
VOD1 ,VOD2
dVOD=VOD1 - VOD2
VOS1 ,VOS2
dVOS=VOS1 - VOS2
V version: <=175MHz
53.125M to 350MHz
>350M
20-80% of VOD
80-20% of VOD
53.125 to 700MHz
@156.25MHz
σ of Random Jitter
Peak to Peak of jitter distribution
σ of Total jitter distribution
*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
♦Test circuit
50Ω Line Impedance
IOP
Test Point
A
By-pass capacitor
10µF
Power
Supply
6
5
4
Vcc
OUT
OUT
OE
NC
GND
1
2
3
100Ω
Test Point
Bypass capacitor
0.01 to 0.1 µF
OE
♦ Timing chart
Vcc
tTLH
tTHL
OUT
80%
Outputs crossing
VOD Differential Voltage
20%
OUT
tw
VOS Offset Voltage
Duty=tw/t x 100
t
GND
♦ External Dimensions ( Unit : mm )
#5
#4
#5
#1
#3
#3
#2
(Metallize)
#2
#6
2.60
5.0 ±0.2
E EG-2121
150.000L
HPA21MA
#1
0.70
5.08
1.4 Max
#4
1.10
7.0 ±0.2
#6
1.40
• Soldering position
3.90
Pin Name
OE
N.C.
GND
OUT
OUT
VCC
2.40
No.
#1
#2
#3
#4
#5
#6
1.60
1.50
0.94
5.08
EPSON ELECTRONICS AMERICA, INC.
www.eea.epson.com
EG2121 LVDS Rev 1.4 35D
♦ Part Numbering Guide
EG-2121CA - 156.2500M - L H P A
Stability condition
A: Including 10yrs Aging N: Excluding Aging
Temperature Range
P: 0 to +70C R: - 5 to +85C
Frequency Stability
H: +/-100ppm
G: +/-50ppm
Output
L: LVDS
V: LVDS (Duty +/-2%)*2
Output Frequency
: see Standard frequency list
*1 Available combination : xHPA, xHPN, xHRA, xHRN, xGPN
For xGPA and xGRN stability, please contact Epson.
xGRA is not available.
*2 V (Duty +/-2%) version is available under 175MHz.
♦ Standard Frequency List
53.1250 *3
62.5000 *3
100.0000
106.2500
125.0000
133.0000
159.3750
161.1328 *4
200.0000
212.5000
312.5000
322.2656 *5
400.0000
425.0000
622.0800
625.0000
644.5313 *6
th
Please round off 5 digit and specify 4-digit accuracy under decimal point.
155.5200
250.0000
500.0000
156.2500
311.0400
*3 available only xHPA and xHPN.
Nominal frequency: *4=161.1328125MHz, *5=322.265625MHz, *6=644.53125MHz
EPSON ELECTRONICS AMERICA, INC.
www.eea.epson.com
EG2121 LVDS Rev 1.4 35D