DS1099U-FF+T [MAXIM]
Clock Generator, 0.03275MHz, CMOS, PDSO8, LEAD FREE, MICRO, SOP-8;
| 型号： | DS1099U-FF+T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Clock Generator, 0.03275MHz, CMOS, PDSO8, LEAD FREE, MICRO, SOP-8 |
| 文件： | 总6页 (文件大小：115K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Rev 1; 9/07
Low-Frequency Dual EconOscillator
DS109
General Description
Features
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.
♦ 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
requirements.
♦ 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
Applications
♦
100ppm/°C Temp Drift (MAX)
Flashing LED Status Indicators
Consumer Appliances
Automotive
Ordering Information
Servers
PART
DS1099U- ꢀ ꢀ 1
TEMP RANGE
PIN-PACKAGE
Printers
-40°C to +125°C
8 μSOP
O
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.
Typical Operating Circuit
Pin Configuration
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
DS1099 OUT0
OE1
N.C.
N.C.
OUT1
GND
DS1099
V
CC
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 Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Low-Frequency Dual EconOscillator
ABSOLUTE MAXIMUM RATINGS
Voltage Range on V
Relative to Ground ...........-0.5V to +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
CC
Voltage Range on OE0 and OE1
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.
DS109
RECOMMENDED DC OPERATING CONDITIONS
(T = -40°C to +125°C)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Voltage
V
(Note 1)
2.7
5.5
V
CC
0.7 x
V
+
CC
0.3
Input Logic 1 (OE0, OE1)
Input Logic 0 (OE0, OE1)
V
V
V
IH
V
CC
+0.3 x
V
V
-0.3
IL
CC
DC ELECTRICAL CHARACTERISTICS
(V
CC
= +2.7V to +5.5V, T = -40°C to +125°C, unless otherwise noted.)
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)
4kHz (both)
C = 15pF per output,
L
OE0 = OE1 = GND,
Active Supply Current (Note 2)
I
μA
CC
V
CC
= 3.3V
1Hz (both)
High-Level Output Voltage
(OUT0, OUT1)
V
I
= -1mA, V = MIN
2.4
V
V
OH
OH
CC
Low-Level Output Voltage
(OUT0, OUT1)
I
I
= 16mA (-40°C to +85°C)
= 12mA (-40°C to +125°C)
OL
OL
V
I
0.4
OL
IH
High-Level Input Current
(OE0, OE1)
V
V
= V
+1.0
μA
μA
IH
IL
CC
Low-Level Input Current
(OE0, OE1)
I
= 0.0V
-1.0
IL
2
_______________________________________________________________________________________
Low-Frequency Dual EconOscillator
DS109
AC ELECTRICAL CHARACTERISTICS
(V
CC
= +2.7V to +5.5V, T = -40°C to +125°C, unless otherwise noted.)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Master Oscillator Frequency
Nominal Output Frequency
Output Frequency Tolerance
f
1.048
MHz
MOSC
f
f
OUT0,
0.25
-1.0
1,048,000
+1.0
Hz
OUT1
Δf
Δf
Δf
T
T
= +25°C, V
= +25°C
= 4.1V
CC
%
ppm/V
%
OUT
OUT
OUT
A
A
3300
Voltage Frequency Variation
(Note 3)
2.7V to 5.5V, T = +25°C
A
-2.0
-100
45
+2.5
+100
55
Temperature Frequency Variation
Output Duty Cycle
(Notes 3, 4)
ppm/°C
%
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.
Typical Operating Characteristics
(V
CC
= +5.0V, T = +25°C, unless otherwise noted.)
A
SUPPLY CURRENT vs. OUTPUT LOAD
SUPPLY CURRENT vs. SUPPLY VOLTAGE
SUPPLY CURRENT vs. TEMPERATURE
(BOTH OUTPUTS LOADED EQUALLY), T = +25°C
C = 15pF, T = +25°C
A
V
= 5.5V, C = 15pF
L
A
CC
L
700
600
500
400
300
200
100
0
700
1.2
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
30
50
TEMPERATURE (°C)
SUPPLY VOLTAGE (V)
C (pF)
L
_______________________________________________________________________________________
3
Low-Frequency Dual EconOscillator
Typical Operating Characteristics (continued)
(V
CC
= +5.0V, T = +25°C, unless otherwise noted.)
A
SUPPLY CURRENT vs. VOLTAGE
DUTY CYCLE vs. SUPPLY VOLTAGE
OUT0 = OUT1 = 1MHz, C = 15pF
FREQUENCY CHANGE vs. SUPPLY VOLTAGE
OEO = OE1 = V
f
= 1MHz, T = +25°C, C = 15pF
CC
L
OUT
A
L
180
52.0
51.0
50.0
49.0
48.0
1.0
0.5
0
DS109
T
A
= +25°C
170
160
150
140
130
120
110
100
T
A
= -40°C
T
T
= +25°C
= +85°C
A
-0.5
-1.0
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
OUTPUT VOLTAGE LOW vs. OUTPUT CURRENT
OUTPUT VOLTAGE HIGH vs. OUTPUT CURRENT
f
OUT
CC
L
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
1.0
0.5
0
V
= 2.7V, T = +25°C
A
V
CC
= 2.7V, T = +25°C
A
CC
OUT0
OUT1
OUT0
OUT1
-0.5
-1.0
0
5
10
15
20
-5
-4
-3
I
-2
(mA)
-1
0
-40
-15
10
35
60
85
I
(mA)
TEMPERATURE (°C)
OL
OH
Pin Description
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
_______________________________________________________________________________________
Low-Frequency Dual EconOscillator
DS109
Functional Diagram
V
CC
MASTER
OSCILLATOR
1.048MHz
V
CC
DS1099
GND
f
MOSC
DIVIDER 0
DIVIDE BY 2
X
f
f
OUT0
OUTPUT
DRIVER
OUT0
OUT1
(X = X = 0...22)
0
FACTORY-
PROGRAMMED
EEPROM
DIVIDER 1
DIVIDE BY 2
X
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-
enable pins only disable the corresponding output
driver(s) and do not shut down the master oscillator or
the dividers.
Detailed Description
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 , is fixed,
MOSC
DIVIDER SETTING
DIVISOR
f
OR f
OUT0 OUT1
the frequency of OUT0 and OUT1 is determined by
DIVIDER 0 and DIVIDER 1, respectively. And since
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
OUT1
OUT0
2
be programmed independent of each other.
2
4
8
The frequency of the outputs are calculated as follows:
3
X
X
X
X
0
/ 2 = 1.048MHz / 2
0
1
f
f
= f
= f
OUT0
OUT1
MOSC
1
/ 2 = 1.048MHz / 2
MOSC
4
16
5
32
where X is the DIVIDER 0 setting and 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
Low-Frequency Dual EconOscillator
The divider settings, X and X , are factory pro-
0
1
Application Information
grammed. When placing an order for the DS1099, it is
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-
required to specify X and X . If only one output is used,
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
DS109
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.
Chip Topology
TRANSISTOR COUNT: 4221
SUBSTRATE CONNECTED TO GROUND
Ordering Information (continued)
Package Information
α
A
B
C
D
E
For the latest package outline information, go to
DIVISOR
20
f
OUT
www.maxim-ic.com/DallasPackInfo.
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
Revision History
Pages changed at Rev 1: 1, 2, 3, 5, 6
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
4Hz
2Hz
1Hz
Y
0.5Hz
Z
0.25Hz
Branding Information
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 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2007 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
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