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DS1099 Datasheet(PDF) 5 Page - Maxim Integrated Products

Part # DS1099
Description  Low-Frequency Dual EconOscillator
Download  7 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

DS1099 Datasheet(HTML) 5 Page - Maxim Integrated Products

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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
www.maximintegrated.com
Maxim Integrated │ 5


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