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DS1099U-AY [DALLAS]

Oscillator,;
DS1099U-AY
型号： DS1099U-AY
厂家： DALLAS SEMICONDUCTOR    DALLAS SEMICONDUCTOR
描述：

Oscillator,
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Rev 0; 2/04  
Lo w -Fre q u e n c y Du a l Ec o n Os c illa t o r  
Ge n e ra l De s c rip t io n  
Fe a t u re s  
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.  
Ind ivid ua l outp ut e na b le s a llow b oth outp uts to b e  
e na b le d /d is a b le d ind e p e nd e ntly. Both outp uts a re  
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.  
♦ 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  
Contact the factory for custom frequencies or require-  
ments.  
♦ 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)  
Ap p lic a t io n s  
Flashing LED Status Indicators  
Consumer Appliances  
Automotive  
Ord e rin g In fo rm a t io n  
Servers  
PART  
TEMP RANGE  
PIN-PACKAGE  
Printers  
DS1099U-α α *  
-40°C to +85°C  
8 µSOP  
0
1
Switch-Mode Power Supplies  
*Where α and α specify the factory programmed divider set-  
0
1
tings for OUT0 and OUT1, respectively.  
Ordering information is continued on the last page.  
EconOscillator is a trademark of Dallas Semiconductor.  
Typ ic a l Op e ra t in g Circ u it  
P in Co n fig u ra t io n  
V
CC  
V
CC  
TOP VIEW  
V
CC  
OUT1  
OUT0  
1
2
3
4
8
7
6
5
N.C.  
N.C.  
OE1  
OEO  
OE0  
OUT0  
OUT1  
DS1099  
OE1  
N.C.  
N.C.  
V
CC  
DS1099  
GND  
GND  
OUTPUTS CAPABLE OF  
SINKING 16mA  
OE1 CAN INSTEAD  
µSOP  
BE TIED TO V  
CC  
IF OUT1 IS NOT USED.  
______________________________________________ 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.  
Lo w -Fre q u e n c y Du a l Ec o n Os c illa t o r  
ABSOLUTE MAXIMUM RATINGS  
Voltage Range on V Relative to Ground ...........-0.5V to +6.0V  
Voltage Range on OE0 and OE1  
Operating Temperature Range ...........................-40°C to +85°C  
CC  
Storage Temperature Range .............................-55°C to +125°C  
Soldering Temperature .......................................See IPC/JEDEC  
J-STD-020A Specification  
Relative to Ground.................................-0.5V to (V + 0.5V),  
CC  
not to exceed 6.0V  
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.  
RECOMMENDED DC OPERATING CONDITIONS  
(T = -40°C to +85°C)  
A
PARAMETER  
SYMBOL  
CONDITIONS  
MIN  
TYP  
MAX  
UNITS  
Supply Voltage  
V
CC  
(Note 1)  
2.7  
5.5  
V
0.7 x  
V
CC  
V
0.3  
+
CC  
Input Logic 1 (OE0, OE1)  
Input Logic 0 (OE0, OE1)  
V
V
V
IH  
+0.3 x  
V
V
IL  
-0.3  
CC  
DC ELECTRICAL CHARACTERISTICS  
(V = +2.7V to +5.5V, T = -40°C to +85°C, unless otherwise noted.)  
CC  
A
PARAMETER  
Standby Supply Current  
SYMBOL  
CONDITIONS  
MIN  
TYP  
145  
323  
146  
145  
MAX  
UNITS  
I
OE0 = OE1 = V  
275  
µA  
STBY  
CC  
1.048MHz (both)  
C
= 15pF per output,  
L
Active Supply Current (Note 2)  
I
CC  
OE0 = OE1 = GND,  
= 3.3V  
4kHz (both)  
1Hz (both)  
µA  
V
CC  
High-Level Output Voltage  
(OUT0, OUT1)  
V
I
= -1mA, V = MIN  
2.4  
V
V
OH  
OH CC  
Low-Level Output Voltage  
(OUT0, OUT1)  
V
I
OL  
= 16mA  
0.4  
OL  
High-Level Input Current  
(OE0, OE1)  
I
V
= V  
CC  
+1.0  
µA  
µA  
IH  
IH  
Low-Level Input Current  
(OE0, OE1)  
I
V
IL  
= 0.0V  
-1.0  
IL  
2
_____________________________________________________________________  
Lo w -Fre q u e n c y Du a l Ec o n Os c illa t o r  
AC ELECTRICAL CHARACTERISTICS  
(V = +2.7V to +5.5V, T = -40°C to +85°C, unless otherwise noted.)  
CC  
A
PARAMETER  
SYMBOL  
CONDITIONS  
MIN  
TYP  
MAX  
UNITS  
Master Oscillator Frequency  
Nominal Output Frequency  
Output Frequency Tolerance  
f
1.048  
MHz  
MOSC  
f
OUT0,  
0.25  
-1.0  
1,048,000  
+1.0  
Hz  
f
OUT1  
∆f  
T
= +25°C, V = 4.1V  
%
ppm/V  
%
OUT  
A
CC  
T
A
= +25°C  
3300  
Voltage Frequency Variation  
(Note 3)  
∆f  
OUT  
2.7V to 5.5V, T = +25°C  
A
-2.0  
-100  
45  
+2.5  
+100  
55  
Temperature Frequency Variation  
Output Duty Cycle  
∆f  
(Notes 3, 4)  
ppm/°C  
%
OUT  
Power-Up Time  
t
(Note 5)  
10  
ms  
PU  
Output Rise/Fall Time  
t , t  
R
C = 15pF (both)  
L
20  
ns  
F
Note 1:  
Note 2:  
All voltages referenced to ground.  
Active supply current combines the standby current with the output current. The output current is defined by  
I = (C + 12pF ) x V x f for each output when enabled.  
LOAD  
CC  
OUT  
Note 3:  
Note 4:  
Note 5:  
This is the change observed in output frequency due to changes in temperature or voltage.  
This parameter is guaranteed by design.  
This indicates the time between power-up and the outputs becoming active.  
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s  
(V = +5.0V, T = +25°C, unless otherwise noted.)  
CC  
A
SUPPLY CURRENT vs. SUPPLY VOLTAGE  
SUPPLY CURRENT vs. TEMPERATURE  
SUPPLY CURRENT vs. OUTPUT LOAD  
V
= 15pF, T = +25°C  
V = 5.5V, C = 15pF  
CC L  
(BOTH OUTPUTS LOADED EQUALLY), T = +25°C  
1.2  
CC  
A
A
700  
600  
500  
400  
300  
200  
100  
0
700  
600  
500  
400  
300  
200  
100  
0
1.0  
OUT0 = OUT1 = 1MHz  
OUT0 = OUT1 = 1MHz  
V
CC  
= 5.5V  
0.8  
0.6  
0.4  
0.2  
0
V
CC  
= 4.0V  
OUT0 =1MHz,  
OUT1 = 0.25Hz  
OUT0 =1MHz,  
OUT1 = 0.25Hz  
V
CC  
= 2.7V  
40  
OUT0 = OUT1 = 0.25Hz  
OUT0 = OUT1 = 0.25Hz  
-40  
-15  
10  
35  
60  
85  
2.7  
3.4  
4.1  
4.8  
5.5  
0
10  
20  
C (pF)  
30  
50  
TEMPERATURE (°C)  
SUPPLY VOLTAGE (V)  
L
_____________________________________________________________________  
3
Lo w -Fre q u e n c y Du a l Ec o n Os c illa t o r  
Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s (c o n t in u e d )  
(V = +5.0V, T = +25°C, unless otherwise noted.)  
CC  
A
SUPPLY CURRENT vs. VOLTAGE  
DUTY CYCLE vs. SUPPLY VOLTAGE  
FREQUENCY CHANGE vs. SUPPLY VOLTAGE  
OEO = OE1 = V  
CC  
OUT0 = OUT1 = 1MHz, C = 15pF  
L
f
= 1MHz, T = +25°C, C = 15pF  
OUT  
A
L
180  
52.0  
51.0  
50.0  
49.0  
48.0  
1.0  
0.5  
0
T = +25°C  
A
170  
160  
150  
140  
130  
120  
110  
100  
T = -40°C  
A
T = +25°C  
A
-0.5  
-1.0  
T = +85°C  
A
2.7  
3.4  
4.1  
4.8  
5.5  
2.7  
3.4  
4.1  
4.8  
5.5  
2.7  
3.4  
4.1  
4.8  
5.5  
SUPPLY VOLTAGE (V)  
SUPPLY VOLTAGE (V)  
SUPPLY VOLTAGE (V)  
FREQUENCY CHANGE vs. TEMPERATURE  
= 1MHz, V = 4.0V, C = 15pF  
f
OUTPUT VOLTAGE LOW vs. OUTPUT CURRENT  
OUTPUT VOLTAGE HIGH vs. OUTPUT CURRENT  
OUT  
CC  
L
1.0  
0.5  
0
0.5  
0.4  
0.3  
0.2  
0.1  
0
2.8  
2.7  
2.6  
2.5  
2.4  
2.3  
2.2  
V
CC  
= 2.7V, T = +25°C  
A
V
CC  
= 2.7V, T = +25°C  
A
OUT0  
OUT1  
OUT0  
OUT1  
-0.5  
-1.0  
-40  
-15  
10  
35  
60  
85  
0
5
10  
(mA)  
15  
20  
-5  
-4  
-3  
-2  
-1  
0
TEMPERATURE (°C)  
I
OL  
I
OH  
(mA)  
P in De s c rip t io n  
PIN  
1
NAME  
OUT1  
OUT0  
FUNCTION  
Oscillator Outputs. Each output is forced high when the corresponding OE is high.  
2
3
V
Positive Supply Terminal  
Ground  
CC  
4
GND  
OE0  
OE1  
N.C.  
5
Output Enable for OUT0 and OUT1, respectively. When low, the outputs are enabled. When high, the  
corresponding output is disabled (forced high).  
6
7, 8  
No Connection  
4
_____________________________________________________________________  
Lo w -Fre q u e n c y Du a l Ec o n Os c illa t o r  
Fu n c t io n a l Dia g ra m  
V
CC  
MASTER  
OSCILLATOR  
1.048MHz  
V
CC  
DS1099  
GND  
f
MOSC  
DIVIDER 0  
DIVIDE BY 2  
X
f
OUT0  
OUTPUT  
DRIVER  
OUT0  
OUT1  
(X = X = 0...22)  
0
FACTORY-  
PROGRAMMED  
EEPROM  
DIVIDER 1  
DIVIDE BY 2  
X
f
OUTPUT OUT1  
DRIVER  
(X = X = 0...22)  
1
OE0  
OE1  
pendently enabled/disabled using the output-enable  
pins, OE0 and OE1, respectively. When the output-  
enable 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-  
e na ble pins only disa ble the c orre sponding output  
driver(s) and do not shut down the master oscillator or  
the dividers.  
De t a ile d De s c rip t io n  
The DS1099 consists of a fixed-frequency 1.048MHz  
master oscillator followed by two independent factory-  
programmable dividers. The two divider outputs are  
connected to pins OUT0 and OUT1, which are inde-  
Table 1. Divider Settings and Output  
Frequencies  
Since the master oscillator frequency, f  
the frequency of OUT0 and OUT1 is determined by  
DIVIDER 0 and DIVIDER 1, respectively. And since  
, is fixed,  
MOSC  
DIVIDER SETTING  
DIVISOR  
f
OR f  
OUT0 OUT1  
X OR X  
0
1
0
1
1
1.048MHz  
0.524MHz  
0.262MHz  
0.131MHz  
65.50kHz  
32.75kHz  
—
each output has its own divider, f  
and f  
can  
OUT0  
OUT1  
2
be programmed independent of each other.  
2
4
8
The frequency of the outputs are calculated as follows:  
3
X
X
X
0
X
1
0
/ 2 = 1.048MHz / 2  
f
= f  
= f  
OUT0  
MOSC  
1
/ 2 = 1.048MHz / 2  
MOSC  
4
16  
f
OUT1  
5
32  
whe re X is the DIVIDER 0 s e tting a nd X is the  
0
1
DIVIDER 1 setting. Valid values for X and X are inte-  
0
1
—
19  
20  
21  
22  
—
gers 0 to 22 (dec).  
524,288  
1,048,576  
2,097,152  
4,194,304  
2Hz  
Table 1 shows output frequencies and divider values  
for the range of divider settings.  
1Hz  
0.5Hz  
0.25Hz  
_____________________________________________________________________  
5
Lo w -Fre q u e n c y Du a l Ec o n Os c illa t o r  
The d ivid e r s e tting s , X a nd X , a re fa c tory p ro-  
0
1
Ap p lic a t io n In fo rm a t io n  
grammed. When placing an order for the DS1099, it is  
required to specify X and X . If only one output is used,  
P o w e r-S u p p ly De c o u p lin g  
To achieve best results, it is highly recommended that  
a decoupling capacitor is used on the IC power-supply  
p ins . Typ ic a l va lue s of d e c oup ling c a p a c itors a re  
0.01µF and 0.1µF. Use a high-quality, ceramic, sur-  
face-mount capacitor, and mount it as close as possi-  
0
1
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  
ble to the V and GND pins of the IC to minimize lead  
CC  
f
period. When OE is brought low, the output is  
OUT  
inductance.  
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.  
Ch ip To p o lo g y  
TRANSISTOR COUNT: 4221  
SUBSTRATE CONNECTED TO GROUND  
P a c k a g e In fo rm a t io n  
For the la te s t p a c ka g e outline informa tion, g o to  
www.maxim-ic.com/DallasPackInfo.  
Ord e rin g In fo rm a t io n (c o n t in u e d )  
α
A
B
C
D
E
DIVISOR  
20  
f
OUT  
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  
21  
22  
23  
24  
25  
26  
27  
28  
F
G
H
J
K
L
29  
210  
211  
212  
213  
214  
215  
216  
217  
218  
219  
220  
221  
222  
M
N
P
Q
R
S
T
8Hz  
U
W
X
Y
Z
4Hz  
2Hz  
1Hz  
0.5Hz  
0.25Hz  
Bra n d in g In fo rm a t io n  
The package branding includes α and α on the top  
0
1
of the package next to or below 1099.  
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 _____________________Ma x im In t e g ra t e d P ro d u c t s , 1 2 0 S a n Ga b rie l Drive , S u n n yva le , CA 9 4 0 8 6 4 0 8 -7 3 7 -7 6 0 0  
© 2004 Maxim Integrated Products  
Printed USA  
is a registered trademark of Maxim Integrated Products.  

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