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参数资料
| 型号： | DS1089LU-23C+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/12页 |
| 文件大小： | 0K |
| 描述： | IC ECONOSCILLATOR SS 8-USOP |
| 其它有关文件： | Automotive Product Guide |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 系列： | EconOscillator™ |
| 类型： | 时钟发生器 |
| PLL： | 无 |
| 输入： | 时钟 |
| 输出： | 时钟 |
| 电路数： | 1 |
| 比率 - 输入:输出： | 1:1 |
| 差分 - 输入:输出： | 无/无 |
| 频率 - 最大： | 33.3MHz |
| 除法器/乘法器： | 是/无 |
| 电源电压： | 2.7 V ~ 3.6 V |
| 工作温度： | -40°C ~ 85°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： | 管件 |
When dither is enabled (by selecting a dither frequency
setting greater than 0 with SPRD high), the master
oscillator frequency is dithered around the center fre-
quency by the selected percentage from the pro-
grammed fMOSC (see Figure 2). For example, if fMOSC
is programmed to 40MHz (factory setting) and the
dither amount is programmed to
±1%, the frequency of
fMOSC will dither between 39.6MHz and 40.4MHz at a
modulation frequency determined by the selected
dither frequency. Continuing with the same example, if
J1 = 0 and J0 = 1, selecting fMOSC / 2048, then the
dither frequency would be 19.531kHz.
Register Summary
The DS1089L registers are used to change the dither
amount, output frequency, and slave address. A bit
summary of the registers is shown in Table 4. Once pro-
grammed into EEPROM, the settings only need to be
reprogrammed if it is desired to reconfigure the device.
PRESCALER Register
Bits 7 to 6:
Dither Frequency. The J1 and J0 bits
control the dither frequency applied to the
output. See Table 2 for divider settings. If
either of bits J1 or J0 is high and SPRD is
high, dither is enabled.
Bit 5:
Output Low or Hi-Z. The LO/HIZ bit
determines the state of the output during
power-down. While the output is deacti-
vated, if the LO/HIZ bit is set to 0, the out-
put will be high impedance (high-Z). If the
LO/HIZ bit is set to 1, the output will be
driven low.
Bit 4:
Reserved.
Bits 3 to 0:
Prescaler Divider. The prescaler bits (bits
P3 to P0) divide the master oscillator fre-
quency by 2x where x can be from 0 to 8.
Any prescaler bit value entered that is
greater than 8 will decode as 8. See Table
1 for prescaler settings.
ADDR Register
Bits 7 to 6:
Dither Percentage. The J3 and J2 bits
control the selected dither amplitude (%).
When both J3 and J2 are set to 0, the
default dither rate is
±1%.
Bit 5:
Output Enable. The OE bit and the OE
pin state determine if the output is on
when the device is active (PDN = VIH). If
(OE = 0 OR OE is high) AND the PDN pin
is high, the output will be driven.
Bit 4:
Reserved.
Bit 3:
Write Control. The WC bit determines if
the EEPROM is to be written after register
contents have been changed. If WC = 0
(default), EEPROM is written automatically
after a write. If WC = 1, the EEPROM is
only written when the WRITE EE command
is issued. See the WRITE EE Command
section for more information.
Bits 2 to 0:
Address. The A0, A1, A2 bits determine
the lower nibble of the I2C slave address.
DS1089L
3.3V Center Spread-Spectrum EconOscillator
_____________________________________________________________________
9
IF DITHER AMOUNT = 0%
(+1, 2, 4,
OR 8% OF fMOSC)
PROGRAMMED
fMOSC
(-1, 2, 4,
OR 8% OF fMOSC)
DITHER
AMOUNT
(2, 4, 8,
OR 16%)
TIME
1
fMOD
f MOSC
Figure 2. Output Frequency vs. Dither Rate
Table 4. Register Summary
REGISTER
ADDR
BIT7
BINARY
BIT0
DEFAULT
ACCESS
PRESCALER
02h
J1
J0
LO/
HIZ
X
P3
P2
P1
P0
xx00xxxxb
R/W
ADDR
0Dh
J3
J2
OE
X
WC
A2
A1
A0
xx100000b
R/W
WRITE EE
3Fh
No Data
—
X = “don’t care”
x = values depend on custom settings
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相关代理商/技术参数 |
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| DS1089LU-23C+ | 功能描述:可编程振荡器 3.3V Center Spread Spctrm EconOscillatr RoHS:否 制造商:IDT 封装 / 箱体:5 mm x 7 mm x 1.5 mm 频率:15.476 MHz to 866.67, 975 MHz to 1300 MHz 频率稳定性:+/- 50 PPM 电源电压:3.63 V 负载电容:10 pF 端接类型:SMD/SMT 输出格式:LVPECL 最小工作温度:- 40 C 最大工作温度:+ 85 C 尺寸:7 mm W x 5 mm L x 1.5 mm H 封装: |
| DS1089LU-266 | 功能描述:可编程振荡器 3.3V Center Spread Spctrm EconOscillatr RoHS:否 制造商:IDT 封装 / 箱体:5 mm x 7 mm x 1.5 mm 频率:15.476 MHz to 866.67, 975 MHz to 1300 MHz 频率稳定性:+/- 50 PPM 电源电压:3.63 V 负载电容:10 pF 端接类型:SMD/SMT 输出格式:LVPECL 最小工作温度:- 40 C 最大工作温度:+ 85 C 尺寸:7 mm W x 5 mm L x 1.5 mm H 封装: |
| DS1089LU-266+ | 功能描述:可编程振荡器 3.3V Center Spread Spctrm EconOscillatr RoHS:否 制造商:IDT 封装 / 箱体:5 mm x 7 mm x 1.5 mm 频率:15.476 MHz to 866.67, 975 MHz to 1300 MHz 频率稳定性:+/- 50 PPM 电源电压:3.63 V 负载电容:10 pF 端接类型:SMD/SMT 输出格式:LVPECL 最小工作温度:- 40 C 最大工作温度:+ 85 C 尺寸:7 mm W x 5 mm L x 1.5 mm H 封装: |
| DS1089LU-450 | 功能描述:可编程振荡器 RoHS:否 制造商:IDT 封装 / 箱体:5 mm x 7 mm x 1.5 mm 频率:15.476 MHz to 866.67, 975 MHz to 1300 MHz 频率稳定性:+/- 50 PPM 电源电压:3.63 V 负载电容:10 pF 端接类型:SMD/SMT 输出格式:LVPECL 最小工作温度:- 40 C 最大工作温度:+ 85 C 尺寸:7 mm W x 5 mm L x 1.5 mm H 封装: |
| DS1089LU-450+ | 功能描述:可编程振荡器 3.3V Center Spread Spctrm EconOscillatr RoHS:否 制造商:IDT 封装 / 箱体:5 mm x 7 mm x 1.5 mm 频率:15.476 MHz to 866.67, 975 MHz to 1300 MHz 频率稳定性:+/- 50 PPM 电源电压:3.63 V 负载电容:10 pF 端接类型:SMD/SMT 输出格式:LVPECL 最小工作温度:- 40 C 最大工作温度:+ 85 C 尺寸:7 mm W x 5 mm L x 1.5 mm H 封装: |
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