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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
Miniature profile
Low power consumption
Standby function
Tape & Reel (1,000 pcs)
ECS-3951C/3953C
SERIES
SMD CLOCK OSCILLATOR
* ECS-3953C is also compatible with a supply voltage of +3.0V DC 0.3V
** Inclusive of 25C 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 F bypass capacitor should be placed between VCC (Pin 4) and GND (Pin 2) to minimize power line noise.
7.5
0.2
5.00
0.2
2.54
1.60
0.15
1
1
4
2
3
3
2
4
1.00
5.08
0.10
1.40
Figure 1) ECS-3951C/3953C Top, Side and Bottom views
PACKAGE DIMENSIONS (mm)
PIN CONNECTIONS
#1
TRI-STATE***
#2
GND
#3
OUTPUT
#4
V
CC
The ECS-3951C (5V) and ECS-3953C (3.3V)
Series are miniature, crystal controlled, low
current clock oscillator in a ceramic SMD
package. The low profile package is ideal
for today's advanced portable PC and
instrumentation designs.
5.08
4.20
2.00
1.40
0.01
F
Figure 2) Land Pattern
ECS-3951C/3953C Standby Control Voltage
PIN #1 = OPEN ***
#3 = OSCILLATION
PIN #1 = V
CC
x0.9 MIN
#3 = OSCILLATION
PIN #1 = V
CC
x0.1 MAX
#3 = HIGH IMPEDANCE
Sample Part Number: ECS-3951C-500-B
PART NUMBERING GUIDE
FREQUENCY (50.0 MHz)
STABILITY TOLERANCE (50 PPM)
ECS-3951C
500
B
OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS
ECS-3951C (5V)
ECS-3953C (3.3V)*
PARAMETERS
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
FREQUENCY RANGE
1.800
80.000
1.800
80.000
MHz
Operating
0
+70
0
+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 ~ 30.0 MHz
10
8
mA
30.0 ~ 35.0 MHz
15
8
mA
35.0 ~ 50.0 MHz
30
12
mA
50.0 ~ 66.0 MHz
30
15
mA
INPUT CURRENT
66.0 ~ 80.0 MHz
50
30
mA
OUTPUT SYMMETRY
@ 1/2 V
CC
Level
40/60
50 4
60/40
40/60
50 4
60/40
%
RISE AND FALL TIMES
10
15
ns
LOGIC "0" LEVEL
V
CC
x 0.1V max.
LOGIC "1" LEVEL
V
CC
x 0.9V min.
LOAD
HCMOS
15
15
pF
1.8 ~ 36.0 MHz
5
5
ms
START-UP TIME
36.0 ~ 80.0 MHz
10
10
ms
VOL=0.5V/0.33
4
4
mA
OUTPUT CURRENT
(IOL)
(IOH)
VOH=4.5V/2.97V
-4
-4
mA
ENABLE/DISABLE TIME
100
100
ns
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