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.
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)
DS1099
Applications
Flashing LED Status Indicators
Consumer Appliances
Automotive
Servers
Printers
Switch-Mode Power Supplies
Ordering Information
PART
DS1099U-α
0
α
1
*
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
8 µSOP
*Where
α
0
and
α
1
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
V
CC
V
CC
Pin Configuration
TOP VIEW
V
CC
OE0
OE1
N.C.
N.C.
OUT1 1
OUT0
OUT1
OUT0
V
CC
2
3
8
7
N.C.
N.C.
OE1
OEO
DS1099
GND
DS1099
6
5
GND 4
OE1 CAN INSTEAD
BE TIED TO V
CC
IF OUT1 IS NOT USED.
OUTPUTS CAPABLE OF
SINKING 16mA
µSOP
______________________________________________
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.
DALLAS [ DALLAS SEMICONDUCTOR ]
