EM7602
Copyright
2003, EM Microelectronic-Marin SA
Subject to change without notice
Rev. C, 07/2003
Phone: +41.32.755-5111, Fax: +41.32.755-5403
www.emmicroelectronic.com
info@emmicroelectronic.com
Low Power Clock Oscillator 32768 Hz
The World's Smallest Thermo-Compensated Oscillator
Dimensions
All dimensions in mm typical
Package:
Recommended Solder Pad:
Pin Description:
1 = Output enable or NC
2 = Ground
3 = Frequency Output
4 = V
DD
3
2
1
4
1.2
8.0
1.2
3.6
1.2
1.
2
2.4
max
1.75
3.0
3.8
1.0
1.8
1.6
4.2
1.8
5.0
1.8
bottom view
top view
side view
KEY FEATURES
Temperature compensation
Small SMD ceramic package
Low power consumption of 6A
Tri state output
& BENEFITS
Save space and components
No more matching of quartz with IC
Easy PCB design
No more trouble with stray capacitors
High shock and vibration resistance
No need for external trimming
components
Typical Applications
Clock drivers for Real Time Clocks
Timekeeping in network servers and
computers
Data logger
Electricity, gas and water metering
Portable field communication
Automotive dashboard
High-end mobile phones
Description
EM7602 is a low power, low frequency crystal oscillator, with a three
times better thermal drift than any conventional tuning fork crystal.
It consists of a torsional tuning fork crystal and a CMOS integrated
circuit, both assembled in the same package. It is ideal for applications
requiring a high timekeeping accuracy over full temperature range.
The oscillator are supplied in trays (91 oscillators per tray).
For pick-and-place equipment, the parts are available in 16mm tapes:
7" (178 mm) reel with 1000 oscillators
10" (254 mm) reel with 2000 oscillators
13" (330 mm) reel with 4000 oscillators
Electrical Characteristics at 25C
Output Frequency
F
32.768
kHz
Frequency tolerance
(note 1)
F/F
30
ppm
Supply voltage
V
DD
2.3 3.6
V
Current Consumption (typ/max)
(note 2)
I
DD
6/10
A
Duty cycle (min/max)
49/51
%
Output voltage (high)
(note 3)
V
OH
V
DD
- 0.4
V
Output voltage (low)
(note 4)
V
OL
0.4
V
Output rise time (max)
(note 5)
t
r
100
ns
Output fall time (max)
(note 5)
t
f
100
ns
Start up time
t
start
1
s
Voltage coefficient
1
ppm/V
Turnover temperature (typ)
T
0
20
C
Temperature coefficient (typ)
-0.012
ppm/C
Frequency stability (typ)
0C to +50C
-20C to +70C
-40C to +85C
F/F
0 to -10
0 to -30
0 to -50
ppm
ppm
ppm
Note 1: Tighter tolerance on request
Note 4: I
OL
= 0.5mA
Note 2: V
DD
= 3.3V, no load
Note 5: C
L
= 15pF, 10% to 90%
Note 3: I
OH
= -0.5mA
EM MICROELECTRONIC
- MARIN SA
EM7602
Copyright
2003, EM Microelectronic-Marin SA
Subject to change without notice
Rev. C, 07/2003
Phone: +41.32.755-5111, Fax: +41.32.755-5403
www.emmicroelectronic.com
info@emmicroelectronic.com
Output Wave Form:
t
r
t
f
0
V
OL
V
OH
V
DD
Environmental Characteristics:
Conditions
Max. Dev.
Storage temp. range
-55C to +125C
Industrial operating temp. range
-40C to +85C
Shock resistance
F/F 5000 g, 0.3 ms, sine
5 ppm
Vibration resistance
F/F
20 g / 10-2000 Hz
5 ppm
Ordering Information,
Terminations and Processing:
Part Nb
Termination
Delivery Form
EM7602V1SM4D
For SMD mounting
Tray (91 pieces)
EM7602V1SM4B
Au (gold) flashed pads Tape & Reel (min. 1000 pieces)
Processing is by reflow soldering at 260C / 20 s max.
Note: Instead of Au (gold) flashed pads, Sn (tin) plated pads are also available
for SMD mounting, subject to availability and minimum order quantity.
Please contact EM Microelectronic for availability of Sn (tin) plated pads
and refer to EM7602V2 (version 2). For samples, only EM7602V1 is
available at all times.
Frequency Temperature
Characteristics
:
-180.0
-160.0
-140.0
-120.0
-100.0
-80.0
-60.0
-40.0
-20.0
0.0
20.0
-60
-40
-20
0
20
40
60
80
100
T [C]
D
F
[
ppm
]
Conventional Tuning Fork
EM7602 Oscillator
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