Data Sheet

45
ECS, INC. INTERNATIONAL 1105 S. RIDGEVIEW, OLATHE, KS 66062 • 913-782-7787 • 800-237-1041 • FAX [phone] • WWW.ECSXTAL.COM
SMD OSCILLATORS SMD OSCILLATORS
FEATURES
• High capacitive load options
• Low power consumption
• Tri-State Function
• Seam welded package
• Tape & Reel (1,000 pcs STD)
ECS-3955M
SERIES
SMD CLOCK OSCILLATOR
The ECS-3955M (5V) ia a high capacitive load
version of our minature, crystal controlled,
low current clock oscillator in an all ceramic
SMD package. The low profile package is
ideal for PC’s, portable applications and
PCMCIA cards.
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-3955M Series Top, Side and Bottom Views
PACKAGE DIMENSIONS (mm)
PIN CONNECTIONS
#1 TRI-STATE**
#2 GND
#3 OUTPUT
#4 V
CC
5.08
4.20
2.00
1.40
0.01µF
Figure 2) Land Pattern
ECS-3955M 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-3955M-500-B
PART NUMBERING GUIDE
PACKAGE TYPE FREQUENCY (50.0 MHz) STABILITY TOLERANCE (B=±50 PPM)
ECS-3955M – 500 – B
* 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.
OPERATING CONDITIONS/ELECTRICAL CHARACTERISTICS
ECS-3955M (5V)
PARAMETERS CONDITIONS
MIN TYP MAX
UNITS
FREQUENCY RANGE 1.800 70.0 MHz
Operating -10 +70 ˚C
TEMPERATURE RANGE
Storage -55˚ +125 ˚C
SUPPLY VOLTAGE +4.5 +5.0 +5.5 V DC
Standard ±100 PPM
Option (B) ±50 PPM
FREQUENCY STABILITY*
Option (C) ±25 PPM
1.8 ~ 36.0 MHz 30 mA
INPUT CURRENT
36.1 ~ 70.0 MHz 65 mA
OUTPUT SYMMETRY @ 1/2 V
CC
Level 40/60 50 ±4 60/40 %
RISE AND FALL TIMES
7 ns
VOL V
CC
x 0.1V V DC
OUTPUT VOLTAGE
VOH V
CC
x 0.9V V DC
LOAD HCMOS 50 pF
1.8 ~ 36.0 MHz 5 ms
START-UP TIME
36.0 ~ 70.0 MHz 10 ms
VOL 16 mA
OUTPUT CURRENT
(IOL)
(IOH)
VOH -16 mA
ENABLE/DISABLE TIME 100 ns
(IOL)