ABX2038/39
PECL and LVDS Low Phase Noise XO (for 65-130MHz Output)
30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 www.Abracon.com 03/21/05 Page 1
FEATURES
• 65MHz to 130MHz Crystal input.
• Output range: 32.5MHz – 130MHz (no PLL).
• Low Injection Power for crystal, 50uW.
• PECL (ABX2038) or LVDS output (ABX2039).
• Supports 2.5V or 3.3V-Power Supply.
• Available in 16-Pin TSSOP.
DESCRIPTION
The ABX2038/39 is a family of XO IC’s specifically
designed to work with high frequency fundamental or
3rd OT crystals from 65MH z to 130MHz, with
selectable PECL or LVDS outputs. They achieve
very low current into the crystal resulting in better
overall stability. Their very low jitter makes them
ideal for the most demanding timing requirements.
BLOCK DIAGRAM
PIN CONFIGURATION
OUTPUT ENABLE LOGICAL LEVELS
Part # OE State
0
(Default) Output enabled
ABX2038 1 Tri-state
0 Tri-state
ABX2039 1
(Default) Output enabled
OE input: Logical states defined by PECL levels fo r ABX2038
Logical states de fined by CMOS levels fo r ABX2039
ABX203x
1
2
3
4
5
6
7
8
VDD
9
10
11
12
13
14
15
16
XIN
XOUT
N/C
S2
OE
N/C
GND
N/C
N/C
GND
CLKC
VDD
CLKT
N/C
N/C
XIN
XOUT
OE
Q
Q
Oscillator
Amplifier S2
ABX2038/39
PECL and LVDS Low Phase Noise XO (for 65-130MHz Output)
30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 www.Abracon.com 03/21/05 Page 2
PIN DESCRIPTIONS
Name Number Type Description
XIN 2 I Crystal input. See Crystal Specifications o n page 2.
XOUT 3 I Crystal output. Se e Crystal Specifications on page 2.
S2 5 I
When pulled low the output is equal to the input d ivided by 2. Internal
pull up.
OE 6 I Output enable. Se e Output Enable Logic table on page 1.
GND 8, 14 P Ground.
CLKT 11 O True output PECL (ABX2038) or L VDS (ABX2039).
CLKC 13 O Complementary o utput PECL (ABX2038) or LVDS (ABX2 039).
N/C 4,7,9,10,15,16 - Not connected.
VDD 1, 12 P Power supply.
ELECTRICAL SPECIFICATIONS
1. Absolute Maximum Ratings
PARAMETERS SYMBOL MIN. MAX. UNITS
Supply Voltage VDD 4.6 V
Input Voltage, dc VI -0.5 VDD+0.5 V
Output Voltage, dc VO -0.5 VDD+0.5 V
Storage Temperature TS -65 150
°C
Ambient Operating T emperature* TA -40 85 °C
Junction Temperature TJ 125
°C
Lead Temperature ( soldering, 10s) 260 °C
ESD Protection, Human Body Model 2 kV
Exposure of the d evice under conditions beyond the limits specified by Maximum Ratings for extended periods may cause pe rmanent damage to the
device and affect product reliability. These conditions represent a stress rating on ly, and functional operations of the device at these or any other
conditions above the operational limits noted in this spec ification is not im plied.
* Note: Operating Temperature is guaranteed by design for all parts (COMMERCIAL and INDUSTRIAL), bu t tested for COMMERCIAL grade only.
2. Crystal Specifications
PARAMETERS SYMBOL CONDITIONS MIN. TYP. MAX. UNITS
Oscillation Frequency OF Fund 65 130 MHz
Crystal Load CL 8.5 pF
Inter-electrode capacitance C0 2.6
ABX2038/39
PECL and LVDS Low Phase Noise XO (for 65-130MHz Output)
30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 www.Abracon.com 03/21/05 Page 3
3. General Electrical Specifications
PARAMETERS SYMBOL CONDITIONS MIN. TYP. MAX. UNITS
Supply Current (Loade d
Outputs) IDD PECL/LVDS 100/80 mA
Operating Volt age VDD 2.97 3.63 V
Output Clock Duty Cycle @ 1.25V (LVDS)
@ VDD – 1.3V (PECL) 45
45 50
50 55
55 %
Short Circuit Current
±50 mA
4. Jitter Specifica tions
PARAMETERS CONDITIONS MIN. TYP. MAX. UNITS
Period jitter RMS 77.76MHz 2.5 ps
Period jitter peak-to-peak 77.76MHz 18.5 ps
Integrated jitte r RMS Integrated 12kHz t o 20MHz at 77.76MHz 0.5 ps
5. Phase Noise Specifications
PARAMETERS FREQUENCY @10Hz @100Hz @1kHz @10kHz @100kHz UNITS
Phase Noise relative
to carrier 77.76MHz -75 -95 -125 -145 -155 dBc/Hz
ABX2038/39
PECL and LVDS Low Phase Noise XO (for 65-130MHz Output)
30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 www.Abracon.com 03/21/05 Page 4
6. LVDS Electrical Characteristics
PARAMETERS SYMBOL CONDITIONS MIN. TYP. MAX. UNITS
Output Differential Voltage VOD 247 355 454 mV
VDD Magnitude Change ∆VOD -50 50 mV
Output High Voltage VOH 1.4 1.6 V
Output Low Voltage VOL 0.9 1.1 V
Offset Voltage VOS 1.125 1.2 1.375 V
Offset Magnitu de Change ∆VOS
RL = 100 Ω
(see figure)
0 3 25 mV
Power-off Leakage IOXD Vout = VDD or GND
VDD = 0V ±1 ±10 uA
Output Short Circuit Current IOSD -5.7 -8 mA
7. LVDS Switching Characteristics
PARAMETERS SYMBOL CONDITIONS MIN. TYP. MAX. UNITS
Differential Clock Rise Time tr 0.2 0.7 1.0 ns
Differential Clock Fall Time tf
RL = 100 Ω
CL = 10 pF
(see figure) 0.2 0.7 1.0 ns
OUT
OUT
V
OD
V
OS
50
Ω
50
Ω
OUT
V
DIFF
R
L
= 100
Ω
C
L
= 10pF
C
L
= 10pF
LVDS Switching Test CircuitLVDS Levels Test Circuit
LVDS Transistion Time Waveform
OUT
OUT
OUT
0V (Differential)
0V
20%
80%
20%
80%
t
R
t
F
V
DIFF
ABX2038/39
PECL and LVDS Low Phase Noise XO (for 65-130MHz Output)
30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 www.Abracon.com 03/21/05 Page 5
8. PECL Electrical Characteristics
PARAMETERS SYMBOL CONDITIONS MIN. MAX. UNITS
Output High Voltage VOH V
DD – 1.025 V
Output Low Voltage VOL RL = 50 Ω to (VDD – 2V)
(see figure) V
DD – 1.620 V
9. PECL Switching Characteristics
PARAMETERS SYMBOL CONDITIONS MIN. TYP. MAX. UNITS
Clock Rise Time tr @20/80% - PECL 0.6 1.5 ns
Clock Fall Time tf @80/20% - PECL 0.5 1.5 ns
OUT
OUT
50
Ω
50
Ω
PECL Levels Test Circuit
PECL Transistion Time Waveform
OUT
OUT
50%
20%
80%
t
R
t
F
VDD
DUTY CYCLE
45 - 55% 55 - 45%
50%
OUT
OUT
t
SKEW
PECL Output Skew
2.0V
ABX2038/39
PECL and LVDS Low Phase Noise XO (for 65-130MHz Output)
30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 www.Abracon.com 03/21/05 Page 6
PACKAGE INFORMATION
CL
A
EH
D
A1
eB
16 PIN TSSO P ( mm )
Symbol Min. Max.
A - 1.20
A1 0.05 0.15
B 0.19 0.30
C 0.09 0.20
D 4.90 5.10
E 4.30 4.50
H 6.40 BSC
L 0.45 0.75
e 0.65 BSC
ORDERING INFORMATION
Abracon Corporation, reserves the right to make changes in its products or specifications, or both at any time without notice. The information
furnished by Abra con is believed to be accurate and reliable. However, Abracon makes no guaran tee or warranty concern ing the accuracy of s aid
information and shall n ot be responsible for any loss or damage of whatever nature resulting from the use of, or reliance upon this product.
LIFE SUPPORT POLICY : Abracon’s products are n ot authorized for use as critic al components in life support devices or sy stems without the exp ress
written approval of the President of Abracon Corporation .
For part ordering, please contact our Sales Department:
30332 Esperanza., R ancho Santa Margarit a, Ca 92688
Ph: 949-546-8000 Fax: 949- 546-8001
PART NUMBER
The order number for this d evice is a combination of th e following:
Device number, Packag e type and Operating tempera ture range
ABX203x O C
Order Number Marking Package Option
ABX2038OC ABX2038OC TSSOP - Tube
ABX2038OC-T ABX2038OC TSSOP - Tape & Reel
ABX2039OC ABX2039OC TSSO P - Tube
ABX2039OC-T ABX2039OC TSSOP - Tape & Reel
PART NUMBER TEMPERATURE
C=COMMERCIAL
I=INDUSTRAL
PACKAGE TYPE
O=TSSOP Q=QFN
