1
S1903 and S1950 Series
3.3V and 5V ACMOS/TTL, High Frequency
Crystal Clock Oscillator (XO)
DS 187 Rev G | 08/11/05
Pericom Semiconductor Corporation • 1-800-435-2336 • http://www.pericom.com/saronix
All specifications are subject to change without notice.
Product Features
• 3.3V or 5V ACMOS/TTL compatible logic levels
• Very tight frequency stability available
• Fast clock edge rate
• Pin-compatible with standard 5x7mm packages
• Designed for standard reflow and washing
techniques
• Pb-free and RoHS/Green compliant
Product Description
The S19xx Series is a 3.3V or 5V crystal clock oscillator
that achieves superb stability and fast rise/fall edges
over a broad range of operating conditions and
frequencies. The output clock signal, generated
internally with a PLL oscillator design, is compatible
with ACMOS/TTL logic levels. The device, available
on tape and reel, is contained in a 5x7mm surface-
mount ceramic package.
Applications
The S19xx Series is an ideal reference clock for high-
speed applications requiring tight stability, including:
• T1 / E1 line cards
• T3 / E3 line cards
• Network processors
• Industrial controls
Common Frequencies
Contact SaRonix for additional frequencies
32.7680 MHz
35.3280 MHz
38.8800 MHz
40.0000 MHz
44.7360 MHz
45.0000 MHz
48.0000 MHz
49.1520 MHz
54.0000 MHz
60.0000 MHz
61.4400 MHz
66.0000 MHz
76.8000 MHz
77.7600 MHz
80.0000 MHz
90.0000 MHz
98.3040 MHz
108.0000 MHz
120.0000 MHz
122.8800 MHz
Ordering Information
Packaging Outline
Actual Size = 5 x 7mm
Pin Functions
Pin Function
1 OE Function
2 Ground
3 Clock Output
4 VDD
7.0±0.2
.276±.008
5.0±0.2
.179±.008
1.8
.071 Max
1
4 3
2
2DS 187 Rev G | 08/11/05
S1903 and S1950 Series
3.3V and 5V ACMOS/TTL, High Frequency
Crystal Clock Oscillator (XO)
Pericom Semiconductor Corporation • 1-800-435-2336 • http://www.pericom.com/saronix
All specifications are subject to change without notice.
Electrical Performance
Parameter Min. Typ. Max. Units Notes
Output frequency (S1903) 32 125 MHz As specied
Output frequency (S1950) 80 125 MHz As specied
Supply voltage (S1903) +2.97 +3.3 +3.63 V
Supply voltage (S1950) +4.75 +5.0 +5.25 V
Supply current (S1903) 35 mA
Supply current (S1950) 35 50 mA
Frequency stability ±20 to
±50 ppM See Note 1 below
Operating temperature -40 +85 °C As specied
Output logic 0, VOL (S1903) 20%
VDD V
Output logic 0, VOL (S1950) 10%
VDD V
Output logic 1, VOH 80%
VDD V
Output load (S1903) 95 ΩAC (ACMOS)
Output load (S1950) 50 ΩAC (ACMOS)
Duty cycle (S1903) 45 55 % -40 to +85°C measured 50%VDD
Duty cycle (S1950) 40 60 % -40 to +85°C measured 50%VDD or 1.5V
Duty cycle (S1950) 45 55 % 0 to +70°C measured 50%VDD
Rise and fall time 2 ns measured 20/80% of waveform
Jitter, total 80 ps
pk-pk up to 72 MHz
Jitter, total 120 ps
pk-pk >72 MHz 0 to 70°C
Jitter, total 150 ps
pk-pk >72 MHz -40 to +85°C
Notes:
1. As specied. 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 2.2 V or open
Input voltage (pin 1), Output
Disable 0.8 V Output is Hi-Z
Internal pullup resistance 50 kΩ
Output disable delay 100 ns
Output enable delay 100 ns
3DS 187 Rev G | 08/11/05
S1903 and S1950 Series
3.3V and 5V ACMOS/TTL, High Frequency
Crystal Clock Oscillator (XO)
Pericom Semiconductor Corporation • 1-800-435-2336 • http://www.pericom.com/saronix
All specifications are subject to change without notice.
Typical Phase Noise
4DS 187 Rev G | 08/11/05
S1903 and S1950 Series
3.3V and 5V ACMOS/TTL, High Frequency
Crystal Clock Oscillator (XO)
Pericom Semiconductor Corporation • 1-800-435-2336 • http://www.pericom.com/saronix
All specifications are subject to change without notice.
Test Circuit
Absolute Maximum Ratings
Parameter Min. Typ. Max. Units Notes
Storage temperature -55 +125 °C
Supply Voltage +7 V
Reliability Test Ratings
This product is rated to meet the following test conditions:
Type Parameter Test Condition
Mechanical Shock MIL-STD-883, Method 2002, Condition B
Mechanical Solderability JESD22-B102-D Method 2 (Preconditioning E)
Mechanical Terminal strength MIL-STD-883, Method 2004, Condition D
Mechanical Gross leak MIL-STD-883, Method 1014, Condition C
Mechanical Fine leak MIL-STD-883, Method 1014, Condition A2 (R1 = 2x10-8 atm cc/s)
Mechanical Solvent resistance MIL-STD-202, Method 215
Environmental Thermal shock MIL-STD-883, Method 1011, Condition A
Environmental Moisture resistance MIL-STD-883, Method 1004
Environmental Vibration MIL-STD-883, Method 2007, Condition A
Environmental Resistance to soldering heat J-STD-020C Table 5-2 Pb-free devices (2 cycles max)
5DS 187 Rev G | 08/11/05
S1903 and S1950 Series
3.3V and 5V ACMOS/TTL, High Frequency
Crystal Clock Oscillator (XO)
Pericom Semiconductor Corporation • 1-800-435-2336 • http://www.pericom.com/saronix
All specifications are subject to change without notice.
Reow Soldering Prole
Output Waveform
VOL
VOH
50%
20%
80%
tftr
Duty cycle = 100%
x
(tA)
/
(tA+ tB)
tAtB
Peak 260°C for 10 sec max
260
Temperature – °C
1 to 3°C/sec max
60 to 90 sec
Time
1 to 3°C/sec
217
4 to 6 minutes max
As per IPC/JEDEC J-STD-020C
6DS 187 Rev G | 08/11/05
S1903 and S1950 Series
3.3V and 5V ACMOS/TTL, High Frequency
Crystal Clock Oscillator (XO)
Pericom Semiconductor Corporation • 1-800-435-2336 • http://www.pericom.com/saronix
All specifications are subject to change without notice.
Mechanical Drawings
Marking LINE 1: S X X (SaRonix, Model (D=S1903, H=S1950), Stability code)
Marking LINE 2: Frequency (Frequency code)
Marking LINE 3: YY WW X (Pin 1, Year, Week, Origin)
Scale: None. Dimensions are in mm/inches.
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.
1.8
.071
4.4
.173
5.08
.200
2.4
.094
2.0
.079
7.0±0.2
.276±.008
5.0±0.2
.179±.008
1.8
.071 Max
1.4
.055
1
4 3
2
5.08
.200
1.2
.047
1.6
.063
2.62
.103
**Exact location of markings may vary.
