参数资料
型号: DS1099U-AG+T
厂商: Maxim Integrated Products
文件页数: 5/6页
文件大小: 0K
描述: IC ECONOSCILLATOR DL 8-USOP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 3,000
系列: EconOscillator™
类型: 时钟发生器
PLL:
输入: 时钟
输出: CMOS,TTL
电路数: 1
比率 - 输入:输出: 1:2
差分 - 输入:输出: 无/无
频率 - 最大: 1.048MHz,16.375kHz
除法器/乘法器: 是/无
电源电压: 2.7 V ~ 5.5 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 8-TSSOP,8-MSOP(0.118",3.00mm 宽)
供应商设备封装: 8-uMAX
包装: 带卷 (TR)
DS1099
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-
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.
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 inte-
gers 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
Functional Diagram
GND
MASTER
OSCILLATOR
1.048MHz
DIVIDER 0
DIVIDE BY 2X
(X = X0 = 0...22)
DIVIDER 1
DIVIDE BY 2X
(X = X1 = 0...22)
VCC
OE1
OE0
OUT0
OUT1
fOUT0
fOUT1
fMOSC
FACTORY-
PROGRAMMED
EEPROM
OUTPUT
DRIVER
OUTPUT
DRIVER
DS1099
Low-Frequency Dual EconOscillator
_______________________________________________________________________________________
5
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