ABX2088/89
Low Phase Noise XO (9.5-65MHz 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
• 19MHz to 65MHz crystal input.
• Output range: 9.5MHz – 65MHz
• Complementary outputs: PECL or LVDS output.
• Selectable OE Logic (enable high or enable low).
• Supports 2.5V or 3.3V Power Supply.
• Available in 16 pin TSSOP package.
DESCRIPTION
The ABX2088 (PECL) and ABX2089 (LVDS) are XO
ICs specifically designed to work with fundamental
or 3rd OT crystals between 19MHz and 65MHz. The
selectable divide by two feature extends the
operation range from 9.5MHz to 65MHz. They
require very low current into the crystal resulting in
better overall stabil ity. The OE log ic feature all ows
selection of enable high or enable low.
BLOCK DIAGRAM
PIN CONFIGURATION
OUTPUT SELECTION AND ENABLE
OE_SELECT OE_CTRL State
0 Tri-state
0 1 (Default) Output enabled
0 (Default) Output enabled
1 (Default) 1 Tri-state
Input selection: Bond to GND to set to “0”, bond to VDD to set to “1”
No connection results to “de fault” setting through
internal pull-up/-down.
OE_CTRL: Logical states de fined by PECL levels if
OE_SELECT is “1”
Logical states de fined by CMOS levels if
OE_SELECT is “0”
OUTPUT FREQUENCY DIVIDE BY
TWO SELECTOR
S2 Output
0 Intput/2
1 Input
O
Q
ABX208X Block Diagram
Q
Oscillator
Amplifier
S2
X+
X-
ABX208x
1
2
3
4
5
6
7
8
VDD
9
10
11
12
13
14
15
16
XIN
XOUT
DNC
S2
OE
N/C
GND
DNC
DNC
GNDBUF
QBAR
VDDBUF
Q
GNDBUF
GND
ABX2088/89
Low Phase Noise XO (9.5-65MHz 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 AND PAD ASSIGNMENT
Name Pin# Description
VDD 1 Power Supply.
XIN 2 Crystal input. See Crystal Specification o n page 3.
XOUT 3 Crystal output. Se e Crystal Specificat ion on page 3.
DNC 4 Do Not Connect.
S2 5
Output Divide by Two selector pin. See th e OUTPUT DIVIDE BY TWO SELECTOR Table on
page 1.
OE_CTRL 6 Output Enable input . See OUTPUT SELECTION AND ENABLE TABLE on pag e 1.
DNC 8 Do Not Connect.
GND 9 Ground.
GNDBUF 10 Ground for output buffer circuitry.
Q 11 PECL or LVDS output.
VDDBUF 12 Power supply for ou tput buffer circuitry.
QBAR 13 Comp lementary PECL or LVDS ou tput.
GNDBUF 14 Ground for output buffer circuitry.
DNC 15 Do Not Connect.
DNC 16 Do Not Connect.
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 devic e 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 al l parts (COMMERCIAL and INDUSTR IAL), but tested for COMMERCIAL grade only .
ABX2088/89
Low Phase Noise XO (9.5-65MHz Output)
30332 Esperanza., Rancho Santa Margarita, Ca 92688 Ph: 949-546-8000 Fax: 949-546-8001 www.Abracon.com 03/21/05 Page 3
2. Crystal Specifications
PARAMETERS SYMBOL CONDITIONS MIN. TYP. MAX. UNITS
Crystal Resonator Freque ncy FXIN Fundamental 19 65 MHz
Crystal Loading Rat ing CL (xtal) 8.5 pF
Interelectrode Capacitance C0 5 pF
Recommended ESR RE AT cut 30 Ω
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 a t 27MHz 2.3
Period jitter peak-to-peak at 27MHz
With capacitive deco upling
between VDD and GND. Over
10,000 cycles 18.5 20 ps
Accumulated jitter RMS a t 27MHz 2.3
Accumulated jitter peak-to-peak at
27MHz
With capacitive deco upling
between VDD and GND. Over
1,000,000 cycles. 24 25
ps
Random Jitter “RJ” measured on Wa vecrest SIA
3000 2.3 ps
Measured on Wavecres t SIA 3000
5. Phase Noise Specifications
PARAMETERS FREQUENCY @10Hz @100Hz @1kHz @10kHz @100kHz UNITS
Phase Noise relative
to carrier 27MHz -75 -100 -125 -140 -145 dBc/Hz
Note: Phase Nois e measured on Agilent E5500
ABX2088/89
Low Phase Noise XO (9.5-65MHz 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
ABX2088/89
Low Phase Noise XO (9.5-65MHz 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
ABX2088/89
Low Phase Noise XO (9.5-65MHz 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 TSSOP ( 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 IN FORMATION
Abracon Corporation, reserves the right to make changes in its products or specifications, or both a t any time without notic e. 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 not authorized for use as critical components in life support devices or systems
without t he express wr itten appr oval of the P resident of Abracon Corp oration.
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
ABX208x x C
Order Number Marking Packag e Option
ABX2088OC-T ABX2088 OC TSSOP – Tape and Reel
ABX2088OC ABX2088 OC TSSOP – Tube
ABX2089OC-T ABX2089 OC TSSOP – Tape and Reel
ABX2089OC ABX2089 OC TSSOP – Tube
PART NUMBER TEMPERATU RE
C=COMMERCIAL
I=INDUSTRIAL
PACKAGE TYPE
O=TSSOP
