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ECS, INC. INTERNATIONAL 1105 S. RIDGEVIEW, OLATHE, KS 66062 • 913-782-7787 • 800-237-1041 • FAX 913-782-6991 • WWW.ECSXTAL.COM
SMD OSCILLATORS SMD OSCILLATORS
FEATURES
• 3.3 or 5.0V version
• Low power consumption
• Standby function
• Seam welded package
• Tape & Reel (1,000 pcs)
• PbFree/RoHS Compliant
ECS-3951M/3953M
SERIES
SMD CLOCK OSCILLATOR
* ECS-3953M is also compatible with a supply voltage of +3.0V DC ±0.3V
** Inclusive of 25˚C tolerance, operating temperature range, input voltage change, load change, aging shock and vibration.
*** An internal pullup resistor from pin 1 to 4 allows active output if pin 1 is left open.
Note: A 0.01 µF bypass capacitor should be placed between VCC (Pin 4) and GND (Pin 2) to minimize power line noise.
7.5 max.
5.0 max.
1.6 ± 0.15
2.6
1
2
3
4
5.08 max.
1
3
2
4
0.6 1.4
Figure 1) ECS-3951M/3953M Top, Side and Bottom views
PACKAGE DIMENSIONS (mm)
PIN CONNECTIONS
#1 TRI-STATE***
#2 GND
#3 OUTPUT
#4 V
CC
The ECS-3951M (5V) and ECS-3953M (3.3V)
Series are miniature, crystal controlled, low
current clock oscillators in a ceramic SMD
package. Package is seam welded with a
metal lid. The low profile package is ideal
for today’s advanced portable PC and
instrumentation designs.
5.08
4.20
2.00
1.40
0.01µF
Figure 2) Land Pattern
ECS-3951M/3953M Standby Control Voltage
PIN #1 = OPEN***
#3 = OSCILLATION
PIN #1 = +2.2V MIN
#3 = OSCILLATION
PIN #1 = 0.8V MAX
#3 = HIGH IMPEDANCE
Sample Part Number: ECS-3951M-500-B
PART NUMBERING GUIDE
PACKAGE TYPE FREQUENCY (50.0 MHz) STABILITY TOLERANCE (±50 PPM)
ECS-3951M – 500 – B
OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS
ECS-3951M (5V) ECS-3953M (3.3V)*
PARAMETERS
CONDITIONS
MIN TYP MAX MIN TYP MAX
UNITS
FREQUENCY RANGE 1.800 125.0 1.800 125.00 MHz
Operating -10 +70 -10 +70 ˚C
TEMPERATURE RANGE
Storage -55 +125 -55 +125 ˚C
SUPPLY VOLTAGE +4.5 +5.0 +5.5 +3.0 +3.3 +3.6 V DC
Standard -100 ±40 +100 –100 ±40 +100 PPM
Option (B) -50 +50 -50 +50 PPM
FREQUENCY STABILITY**
Option (C) -25 +25 -25 +25 PPM
1.8 ~ 36.0 MHz 20 15 mA
36.0 ~ 70.0 MHz 55 25 mA
70.0 ~ 100.0 MHz 60 30 mA
INPUT CURRENT
100.0 ~ 125.0 MHz 65 30
OUTPUT SYMMETRY @ 1/2 V
CC
Level 40/60 50 ±4 60/40 40/60 50 ±4 60/40 %
1.8 ~ 70.0 MHz 15 5 nS
RISE AND FALL TIMES
70.0 ~ 125.0 MHz 5 5 nS
LOGIC “0” LEVEL V
CC
x 0.1V max.
LOGIC “1” LEVEL V
CC
x 0.9V min.
LOAD HCMOS 30 15 pF
1.8 ~ 36.0 MHz 5 5 ms
36.0 ~ 70.0 MHz 10 10 ms
START-UP TIME
70.0 ~ 100.0 MHz 15 15 ms
VOL=0.5V/0.33 4 4 mA
OUTPUT CURRENT
(IOL)
VOL=4.5V/2.97V -4 -4 mA
ENABLE/DISABLE TIME 100 100 ns
(IOH)
