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DS1099 Schematic ( PDF Datasheet ) - Dallas Semiconducotr

Teilenummer DS1099
Beschreibung Low-Frequency Dual EconOscillator
Hersteller Dallas Semiconducotr
Logo Dallas Semiconducotr Logo 




Gesamt 6 Seiten
DS1099 Datasheet, Funktion
www.DataSheet4U.com
Rev 0; 2/04
Low-Frequency Dual EconOscillator
General Description
The DS1099 is a low-cost, low-power, low-frequency
silicon oscillator that generates two square-wave out-
puts with frequencies between 0.25Hz and 1.048MHz.
Individual output enables allow both outputs to be
enabled/disabled independently. Both outputs are
capable of sinking 16mA, allowing them to directly
interface to light-emitting diodes (LEDs) as well as other
external circuitry. The DS1099 operates over a wide
supply voltage, making it suitable for both 3V and 5V
systems. The device is shipped from the factory custom
programmed and calibrated, ready to be inserted into
the end application.
Contact the factory for custom frequencies or require-
ments.
Applications
Flashing LED Status Indicators
Consumer Appliances
Automotive
Servers
Printers
Switch-Mode Power Supplies
Features
Low-Cost, Low-Frequency EconOscillator™ with
Dual Outputs
Factory Programmed
Output Frequencies Independently Programmable
from 0.25Hz to 1.048MHz
2.7V to 5.5V Single-Supply Operation
No External Timing Components Required
Independent Output Enables
CMOS/TTL-Compatible Outputs
Oscillator Outputs Capable of Sinking 16mA to
Directly Drive LEDs
Relieves Microprocessor of Periodic Interrupt
Low-Power Consumption
Operating Temperature Range: -40°C to +85°C
±100ppm/°C Temp Drift (MAX)
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
DS1099U-α0 α1*
-40°C to +85°C
8 µSOP
*Where α0 and α1 specify the factory programmed divider set-
tings for OUT0 and OUT1, respectively.
Ordering information is continued on the last page.
EconOscillator is a trademark of Dallas Semiconductor.
Typical Operating Circuit
Pin Configuration
VCC VCC
TOP VIEW
VCC
OE0
OE1 DS1099 OUT0
N.C. OUT1
N.C. GND
OE1 CAN INSTEAD
BE TIED TO VCC
IF OUT1 IS NOT USED.
OUTPUTS CAPABLE OF
SINKING 16mA
OUT1 1
OUT0 2
VCC 3
GND 4
DS1099
µSOP
8 N.C.
7 N.C.
6 OE1
5 OEO
______________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.






DS1099 Datasheet, Funktion
Low-Frequency Dual EconOscillator
The divider settings, X0 and X1, are factory pro-
grammed. When placing an order for the DS1099, it is
required to specify X0 and X1. If only one output is used,
it is recommended that the unused output be disabled.
The oscillator outputs are asynchronous. Since the
master oscillator and dividers are free running, even
when both outputs are disabled, the state of the output
when OE becomes active is unknown for up to half an
fOUT period. When OE is brought low, the output is
enabled instantaneously. Likewise, if the output is dis-
abled while outputting the low half of a cycle, the out-
put instantaneously is forced high before the current
cycle is completed.
Ordering Information (continued)
α DIVISOR
A 20
B 21
C 22
D 23
E 24
F 25
G 26
H 27
J 28
K 29
L 210
M 211
N 212
P 213
Q 214
R 215
S 216
T 217
U 218
W 219
X 220
Y 221
Z 222
fOUT
1.048MHz
0.524MHz
0.262MHz
0.131MHz
65.50kHz
32.750kHz
16.375kHz
8.187kHz
4.093kHz
2.046kHz
1.023kHz
511.7Hz
255.8Hz
127.9Hz
63.96Hz
31.98Hz
16Hz
8Hz
4Hz
2Hz
1Hz
0.5Hz
0.25Hz
Branding Information
The package branding includes α0 and α1 on the top
of the package next to or below 1099.
Application Information
Power-Supply Decoupling
To achieve best results, it is highly recommended that
a decoupling capacitor is used on the IC power-supply
pins. Typical values of decoupling capacitors are
0.01µF and 0.1µF. Use a high-quality, ceramic, sur-
face-mount capacitor, and mount it as close as possi-
ble to the VCC and GND pins of the IC to minimize lead
inductance.
Chip Topology
TRANSISTOR COUNT: 4221
SUBSTRATE CONNECTED TO GROUND
Package Information
For the latest package outline information, go to
www.maxim-ic.com/DallasPackInfo.
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2004 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.

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