S1644 Series
2.5V CMOS Low Jitter
Crystal Clock Oscillator (XO)
Actual Size = 3.2 x 2.5mm
Product Features
• Very low jitter with non-PLL clock circuit
• 2.5V CMOS compatible logic levels
• Pin-compatible with standard 3.2x2.5mm packages
• Designed for standard reflow and washing
techniques
• Low power standby mode
• Pb-free and RoHS/Green compliant
Packaging Outline
Pin Functions
Pin
Function
1
2
3
4
OE Function
Ground
Clock Output
V
DD
Product Description
The S1644 Series is a 2.5V crystal clock oscillator that
achieves superb stability and low power consumption
over a broad range of operating conditions and
frequencies. The low jitter 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.
½½½½½½½½½½½
½½½½½½½½½½½½½½
Common Frequencies
Contact SaRonix for additional frequencies
Applications
The S1644 Series is an ideal reference clock for
compact, high-density applications requiring low
power or tight stability, including:
• Network adapter cards
• Portable Multimedia Devices
• Hard Disk Drives
• GPS/Navigation
• Bluetooth
• 802.11a/b/g WiFi
1.8432 MHz
3.072 MHz
3.6864 MHz
10.0000 MHz
12.0000 MHz
12.2880 MHz
13.0000 MHz
13.5000 MHz
14.7456 MHz
18.4320 MHz
20.0000 MHz
24.0000 MHz
24.5760 MHz
25.0000 MHz
26.0000 MHz
27.0000 MHz
37.5000 MHz
40.0000 MHz
48.0000 MHz
50.0000 MHz
75.0000 MHz
Ordering Information
½½½½½½½
½½½½½½½½½½½½½½
½½½½½½½½½½½½½½½½½½½
½½½½½½½½½½½½½½½½½½½½½½½½½½½½
½½½½½½½½½½½½½½½½½½½½½½½½½½½
½½½½½½½½½½½½½½½½½½½½½½½½½½½
½
½½½½ ½
½½½½½½½½½½½½½½½½½
½½½½½½½½½
½½½½½½½½½½½½½½½½½
½½½½½½½½½½½½½½½½½½½½½½½½½
½½½½½½½½½½½½½½½½½½½½½
½½½½½½½½½½½½½½½½½½½½½½½
* 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 271 Rev 01 | 01-12-06
S1644 Series
2.5V CMOS Low Jitter
Crystal Clock Oscillator (XO)
Electrical Performance
Parameter
Min.
Typ.
Max.
Units
Notes
Output frequency
Supply voltage
Supply current, output enabled
Supply current, standby mode
Frequency stability
Operating temperature
Output logic 0, VOL
Output logic 1, VOH
Output load
Duty cycle
Rise and fall
time
1.8432
+2.375
+2.5
80
+2.625
8
15
10
±25 to ±50
MHz
V
mA
µA
ppM
°C
V
V
pF
%
ns
As specified
1.8432 to 50 MHz
>50 MHz
Output Hi-Z
See Note 1 below
As specified
I
OL
= 6mA min
I
OH
= -6mA max
-40 to +85°C measured 50%VDD
measured 10/90% of waveform
-40
90% V
DD
+85
10% V
DD
15
45
55
5
Note:
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
50
100
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 271 Rev 01 | 01-12-06
S1644 Series
2.5V 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
4
0.1µF
or
0.01µF
1
Power
Supply
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 271 Rev 01 | 01-12-06
S1644 Series
2.5V CMOS Low Jitter
Crystal Clock Oscillator (XO)
Output Waveform
½
½
½
½
½
½½½ ½
½½½
½½½½
½½½
½½½
½
½
½
½½½½½½½½½½½½½½½½½½
½
½½½
½
½
½½½
½½
½
½½½½
½
½
½
½
Reflow Soldering Profile
As per IPC/JEDEC J-STD-020C
260
217
1 to 3°C/sec max
Peak 260°C for 10 sec max
1 to 3°C/sec
Temperature – °C
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 271 Rev 01 | 01-12-06
S1644 Series
2.5V 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:
S 12.345
Y WW X 4 X
(SaRonix, Frequency code)
(Pin 1, Year, Week, Origin, Model, Stability)
**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 271 Rev 01 | 01-12-06
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