S1642 Series
1.8V CMOS Low Jitter
Crystal Clock Oscillator (XO)
Actual Size = 3.2 x 2.5mm
Product Features
• Less than 1.5 ps RMS jitter with fundamental or
overtone design
• 1.8V CMOS compatible logic levels
• Pin-compatible with standard 3.2x2.5mm packages
• Designed for standard reflow and washing
techniques
• Low power standby mode: 10 uA max
• Pb-free and RoHS/Green compliant
Packaging Outline
Pin Functions
Pin
Function
1
2
3
4
2.5 0.2
0.098 0.008
OE Function
Ground
Clock Output
V
DD
Product Description
The S1642 Series is a 1.8V crystal clock oscillator
that achieves superb jitter and stability over a broad
range of operating conditions and frequencies. The
output clock signal, generated internally with a non-PLL
oscillator design, is compatible with LVCMOS logic
levels. The device, available on tape and reel, is
contained in a 3.2x2.5mm surface-mount ceramic
package.
Common Frequencies
Contact SaRonix for additional frequencies
10.0000 MHz
14.3181 MHz
16.0000 MHz
20.0000 MHz
24.0000 MHz
24.5760 MHz
25.0000 MHz
27.0000 MHz
32.0000 MHz
40.0000 MHz
48.0000 MHz
66.0000 MHz
75.0000 MHz
Applications
The S1642 Series is an ideal reference clock for
compact, high-density applications requiring low jitter
tight stability, or low power consumption, including:
• WLAN
• HBA
• Portable Multimedia Player (PMP)
• Notebook Computer
• SDIO / PCMIA CARD
• USB BT Interface
• Bluetooth
Ordering Information
SaRonix
Product Series
Frequency Stability
*A = ±25 ppM (-20 to +70 °C)
B = ±50 ppM (-2 to +70 °C)
*E = ±50 ppM (-40 to +85°C)
S 1633 B - 125.000 (T)
Packaging
(T) = Tape & Reel
full reel increments
Blank = Bulk packaged
Output Frequency
(MHz)
* Availability varies by frequency.
Pericom Semiconductor Corporation • 1-800-435-2336 • http://www.pericom.com/saronix
1
All specifications are subject to change without notice.
DS 282 Rev 01 | 05/08/07
S1642 Series
1.8V CMOS Low Jitter
Crystal Clock Oscillator (XO)
Electrical Performance
Parameter
Min.
Typ.
Max.
Units
Notes
Output frequency
Supply voltage
1.5440
1.71
1.8
100
1.89
4
7
10
20
MHz
V
As specified
1.5440 to <36 MHz
Supply current, output enabled
mA
36 to <50 MHz
50 to <70 MHz
70 to 100 MHz
Standby current
Frequency stability
Operating temperature
Output logic 0, VOL
Output logic 1, VOH
Output load
Duty cycle
Rise and fall
time
Jitter,
Phase
Jitter,
Accumulated
Jitter,
Total
<36 MHz
36 to 100 MHz
up to 75 MHz
75 to 100 MHz
up to <75 MHz
75 to 100 MHz
up to <75 MHz
75 to 100 MHz
45
90% V
DD
-40
10
100
±25 to ±50
+85
10% V
DD
15 pF (max)
55
4
2.5
1.5
1
5
3
50
30
μA
uA
ppM
°C
V
V
%
ns
ps RMS
(1-σ)
ps RMS
(1-σ)
ps
pk-pk
1.5440 to <36MHz
36 to 100MHz
See Note 1 below
As specified
measured 50%VDD
measured 20/80% of waveform
10kHz to 20 MHz frequency band
20.000 adjacent periods
100.000 random periods
Notes:
1. As specified. Stability includes all combinations of operating temperature, load changes, rated input (supply) voltage changes, initial calibration tolerance (25°C),
aging (1 year at 25°C average effective ambient temperature), shock and vibration.
Output Enable / Disable Function
Parameter
Min.
Typ.
Max.
Units
Notes
Input Voltage (pin 1), Output
Enable
Input voltage (pin 1), Output
Disable (low power standby)
Internal pullup resistance
Output disable delay
Output enable delay
0.7 V
DD
0.3 V
DD
30
200
10
V
V
kΩ
ns
ms
or open
Output is Hi-Z
Pericom Semiconductor Corporation • 1-800-435-2336 • http://www.pericom.com/saronix
2
All specifications are subject to change without notice. DS 282 Rev 01 | 05/08/07
S1642 Series
1.8V CMOS Low Jitter
Crystal Clock Oscillator (XO)
Absolute Maximum Ratings
Parameter
Min.
Typ.
Max.
Units
Notes
Storage temperature
-55
+125
°C
Test Circuit
Test Point
Power
Supply
4
0.1μF
or
0.01μF
1
3
2
15 pF
(Including probe
and fixture
capacitance)
Output Enable / Disable Function
Reliability Test Ratings
This product is rated to meet the following test conditions:
Type
Parameter
Test Condition
Mechanical
Mechanical
Mechanical
Mechanical
Mechanical
Mechanical
Environmental
Environmental
Environmental
Environmental
Shock
Solderability
Terminal strength
Gross leak
Fine leak
Solvent resistance
Thermal shock
Moisture resistance
Vibration
Resistance to soldering heat
MIL-STD-883, Method 2002, Condition B
JESD22-B102-D Method 2 (Preconditioning E)
MIL-STD-883, Method 2004, Condition D
MIL-STD-883, Method 1014, Condition C
MIL-STD-883, Method 1014, Condition A2 (R
1
= 2x10
-8
atm cc/s)
MIL-STD-202, Method 215
MIL-STD-883, Method 1011, Condition A
MIL-STD-883, Method 1004
MIL-STD-883, Method 2007, Condition A
J-STD-020C Table 5-2 Pb-free devices (2 cycles max)
Pericom Semiconductor Corporation • 1-800-435-2336 • http://www.pericom.com/saronix
3
All specifications are subject to change without notice. DS 282 Rev 01 | 05/08/07
S1642 Series
1.8V CMOS Low Jitter
Crystal Clock Oscillator (XO)
Output Waveform
t
f
VOH
t
r
80%
50%
20%
VOL
t
A
Duty cycle = 100%
x
(t
A
)
/
(t
A
+ t
B
)
t
B
Reflow Soldering Profile
As per IPC/JEDEC J-STD-020C
1 to 3°C/sec max
Temperature – °C
260
Peak 260°C for 10 sec max
1 to 3°C/sec
217
Time
60 to 90 sec
4 to 6 minutes max
Pericom Semiconductor Corporation • 1-800-435-2336 • http://www.pericom.com/saronix
4
All specifications are subject to change without notice. DS 282 Rev 01 | 05/08/07
S1642 Series
1.8V CMOS Low Jitter
Crystal Clock Oscillator (XO)
Mechanical Drawings
Recommended Land Pattern*
*External high-frequency power decoupling is
recommended.(see test circuit for minimum recom-
mendation). To ensure optimal performance, do not
route traces beneath the package.
Scale: None. Dimensions are in mm/inches.
Marking LINE 1:
Marking LINE 2:
S12.3456
YY WW X2X
(SaRonix, Frequency Code)
(Pin 1, Year, Week, Origin, Model, Internal Use)
**Exact location of markings may vary.
Pericom Semiconductor Corporation • 1-800-435-2336 • http://www.pericom.com/saronix
5
All specifications are subject to change without notice. DS 282 Rev 01 | 05/08/07
stm32/stm8
