DS1099 Datasheet by Maxim Integrated

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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
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 +125°C
±100ppm/°C Temp Drift (max)
19-7629; Rev 2; 5/15
EconOscillator is a trademark of Maxim Integrated Products, Inc.
Ordering information is continued on the last page.
*Where α 0 and α 1 specify the factory-programmed divider
settings for OUT0 and OUT1, respectively.
PART TEMP RANGE PIN-PACKAGE
DS1099U- a O a 1 -40°C to +125°C 8 µSOP
Ordering Information
OUT0
OUT1
GND
OE0
VCC
VCC
VCC
OE1
N.C.
N.C.
OE1 CAN INSTEAD
BE TIED TO VCC
IF OUT1 IS NOT USED.
OUTPUTS CAPABLE OF
SINKING 16mA
DS1099
OE1
OEOGND
1
2
8
7
N.C.
N.C.OUT0
VCC
OUT1
µSOP
TOP VIEW
3
4
6
5
DS1099
Pin ConfigurationTypical Operating Circuit
DS1099 Low-Frequency Dual EconOscillator
Voltage Range on VCC Relative to Ground .........-0.5V to +6.0V
Voltage Range on OE0 and OE1
Relative to Ground .................................. -0.5V to (VCC + 0.5V),
not to exceed 6.0V
Operating Temperature Range ......................... -40°C to +125°C
Storage Temperature Range ............................ -55°C to +125°C
Soldering Temperature ......................................See IPC/JEDEC
J-STD-020A Specification
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
(VCC = +2.7V to +5.5V, TA = -40°C to +125°C, unless otherwise noted.)
(TA = -40°C to +125°C)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Standby Supply Current ISTBY OE0 = OE1 = VCC 145 275 µA
Active Supply Current (Note 2) ICC
CL = 15pF per output,
OE0 = OE1 = GND,
VCC = 3.3V
1.048MHz (both) 323
µA4kHz (both) 146
1Hz (both) 145
High-Level Output Voltage
(OUT0, OUT1) VOH IOH = -1mA, VCC = MIN 2.4 V
Low-Level Output Voltage
(OUT0, OUT1) VOL
IOL = 16mA (-40°C to +85°C)
IOL = 12mA (-40°C to +125°C) 0.4 V
High-Level Input Current
(OE0, OE1)IIH VIH = VCC +1.0 µA
Low-Level Input Current
(OE0, OE1)IIL VIL = 0.0V -1.0 µA
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage VCC (Note 1) 2.7 5.5 V
Input Logic 1 (OE0, OE1) VIH
0.7 x
VCC
VCC +
0.3 V
Input Logic 0 (OE0, OE1) VIL -0.3 +0.3 x
VCC
V
DC Electrical Characteristics
Recommended DC Operating Conditions
Absolute Maximum Ratings
DS1099 Low-Frequency Dual EconOscillator
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2
(VCC = +5.0V, TA = +25°C, unless otherwise noted.)
Note 1: All voltages referenced to ground.
Note 2: Active supply current combines the standby current with the output current. The output current is defined by
I = (CLOAD + 12pF ) x VCC x fOUT for each output when enabled.
Note 3: This is the change observed in output frequency due to changes in temperature or voltage.
Note 4: This parameter is guaranteed by design.
Note 5: This indicates the time between power-up and the outputs becoming active.
(VCC = +2.7V to +5.5V, TA = -40°C to +125°C, unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Master Oscillator Frequency fMOSC 1.048 MHz
Nominal Output Frequency fOUT0,
fOUT1
0.25 1,048,000 Hz
Output Frequency Tolerance ∆fOUT TA = +25°C, VCC = 4.1V -1.0 +1.0 %
Voltage Frequency Variation
(Note 3) ∆fOUT
TA = +25°C 3300 ppm/V
2.7V to 5.5V, TA = +25°C -2.0 +2.5 %
Temperature Frequency Variation ∆fOUT (Notes 3, 4) -100 +100 ppm/°C
Output Duty Cycle 45 55 %
Power-Up Time tPU (Note 5) 10 ms
Output Rise/Fall Time tR, tFCL = 15pF (both) 20 ns
SUPPLY CURRENT vs. OUTPUT LOAD
(BOTH OUTPUTS LOADED EQUALLY), TA = +25°C
DS1099 toc03
CL (pF)
SUPPLY CURRENT (mA)
40302010
0.2
0.4
0.6
0.8
1.0
1.2
0
0 50
VCC = 5.5V
VCC = 4.0V
VCC = 2.7V
SUPPLY CURRENT vs. TEMPERATURE
VCC = 5.5V, CL = 15pF
DS1099 toc02
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
603510-15
100
200
300
400
500
600
700
0
-40 85
OUT0 = OUT1 = 1MHz
OUT0 = OUT1 = 0.25Hz
OUT0 =1MHz,
OUT1 = 0.25Hz
SUPPLY CURRENT vs. SUPPLY VOLTAGE
CL = 15pF, TA = +25°C
DS1099 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
4.84.13.4
100
200
300
400
500
600
700
0
2.7 5.5
OUT0 = OUT1 = 1MHz
OUT0 = OUT1 = 0.25Hz
OUT0 =1MHz,
OUT1 = 0.25Hz
Typical Operating Characteristics
AC Electrical Characteristics
DS1099 Low-Frequency Dual EconOscillator
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vgkkw 050 0:1 cum oun
(VCC = +5.0V, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
PIN NAME FUNCTION
1OUT1 Oscillator Outputs. Each output is forced high when the corresponding OE is high.
2OUT0
3 VCC Positive Supply Terminal
4 GND Ground
5OE0 Output Enable for OUT0 and OUT1, respectively. When low, the outputs are enabled. When high, the
corresponding output is disabled (forced high).
6OE1
7, 8 N.C. No Connection
OUTPUT VOLTAGE HIGH vs. OUTPUT CURRENT
DS1099 toc09
IOH (mA)
VOH (V)
-1-2-3-4
2.3
2.4
2.5
2.6
2.7
2.8
2.2
-5 0
VCC = 2.7V, TA = +25°C
OUT0
OUT1
OUTPUT VOLTAGE LOW vs. OUTPUT CURRENT
DS1099 toc08
IOL (mA)
VOLTAGE (V)
15105
0.1
0.2
0.3
0.4
0.5
0
0 20
VCC = 2.7V, TA = +25°C
OUT0
OUT1
FREQUENCY CHANGE vs. TEMPERATURE
fOUT = 1MHz, VCC = 4.0V, CL = 15pF
DS1099 toc07
TEMPERATURE (°C)
FREQUENCY (% CHANGE)
603510-15
-0.5
0
0.5
1.0
-1.0
-40 85
FREQUENCY CHANGE vs. SUPPLY VOLTAGE
fOUT = 1MHz, TA = +25°C, CL = 15pF
DS1099 toc06
SUPPLY VOLTAGE (V)
FREQUENCY (% CHANGE)
4.84.13.4
-0.5
0
0.5
1.0
-1.0
2.7 5.5
DUTY CYCLE vs. SUPPLY VOLTAGE
OUT0 = OUT1 = 1MHz, CL = 15pF
DS1099 toc05
SUPPLY VOLTAGE (V)
DUTY CYCLE (% CHANGE)
4.84.13.4
49.0
50.0
51.0
52.0
48.0
2.7 5.5
TA = -40°C
TA = +25°C
TA = +85°C
SUPPLY CURRENT vs. VOLTAGE
OEO = OE1 = VCC
DS1099 toc04
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
4.84.13.4
110
120
130
140
150
160
170
180
100
2.7 5.5
TA = +25°C
Pin Description
DS1099 Low-Frequency Dual EconOscillator
Maxim Integrated
4
www.maximintegrated.com
D
Detailed Description
The DS1099 consists of a fixed-frequency 1.048MHz
master oscillator followed by two independent facto-
ry-programmable dividers. The two divider outputs
are connected to pins OUT0 and OUT1, which are
independently enabled/disabled using the output-enable
pins, OE0 and OE1, respectively. When the output-en-
able pins are active (low), the corresponding outputs are
enabled. If either output-enable pin is tied to its inactive
state (high), then the corresponding output is disabled
and forced high immediately. The output- enable pins only
disable the corresponding output driver(s) and do not shut
down the master oscillator or the dividers.
Since the master oscillator frequency, fMOSC, is fixed, the
frequency of OUT0 and OUT1 is determined by DIVIDER
0 and DIVIDER 1, respectively. And since each output
has its own divider, fOUT0 and fOUT1 can be programmed
independent of each other.
The frequency of the outputs are calculated as follows:
fOUT0 = fMOSC/2X0 = 1.048MHz/2X0
fOUT1 = fMOSC/2X1 = 1.048MHz/2X1
where X0 is the DIVIDER 0 setting and X1 is the DIVIDER
1 setting. Valid values for X0 and X1 are integers 0 to 22
(dec).
Table 1 shows output frequencies and divider values for
the range of divider settings.
Table 1. Divider Settings and Output
Frequencies
DIVIDER SETTING
X0 OR X1
DIVISOR fOUT0 OR fOUT1
0 1 1.048MHz
1 2 0.524MHz
2 4 0.262MHz
3 8 0.131MHz
4 16 65.50kHz
5 32 32.75kHz
———
19 524,288 2Hz
20 1,048,576 1Hz
21 2,097,152 0.5Hz
22 4,194,304 0.25Hz
GND
MASTER
OSCILLATOR
1.048MHz
DIVIDER 0
DIVIDE BY 2X
(X = X0 = 0...22)
DIVIDER 1
DIVIDE BY 2X
(X = X1 = 0...22)
VCC
VCC
OE1
OE0
OUT0
OUT1
fOUT0
fOUT1
fMOSC
FACTORY-
PROGRAMMED
EEPROM
OUTPUT
DRIVER
OUTPUT
DRIVER
DS1099
Functional Diagram
DS1099 Low-Frequency Dual EconOscillator
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5
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.
Applications 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, surface-mount
capacitor, and mount it as close as possible to the VCC
and GND pins of the IC to minimize lead inductance.
aDIVISOR fOUT
A 201.048MHz
B 210.524MHz
C 220.262MHz
D 230.131MHz
E 2465.50kHz
F 2532.750kHz
G 2616.375kHz
H 278.187kHz
J 284.093kHz
K 292.046kHz
L 210 1.023kHz
M 211 511.7Hz
N 212 255.8Hz
P 213 127.9Hz
Q 214 63.96Hz
R 215 31.98Hz
S 216 16Hz
T 217 8Hz
U 218 4Hz
W 219 2Hz
X 220 1Hz
Y 221 0.5Hz
Z 222 0.25Hz
Package Information
For the latest package outline information and land patterns
(footprints), go to www.maximintegrated.com/packages.
Note that a “+”, “#”, or “-” in the package code indicates
RoHS status only. Package drawings may show a different
suffix character, but the drawing pertains to the package
regardless of RoHS status.
Branding Information
The package branding includes a0 and a1 on the top of
the package next to or below 1099.
Ordering Information (continued) Chip Topology
SUBSTRATE CONNECTED TO Ground
DS1099 Low-Frequency Dual EconOscillator
www.maximintegrated.com Maxim Integrated
6
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
1 9/07 — 1, 2, 3, 5, 6
2 5/15 Remove automotive reference from data sheet 1
Revision History
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
DS1099 Low-Frequency Dual EconOscillator
© 2015 Maxim Integrated Products, Inc.
7
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.

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