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參數(shù)資料
| 型號： | DS1094L |
| 英文描述： | 10/100/1000 Base-T Ethernet LAN Switch |
| 中文描述： | 多相擴頻EconOscillator |
| 文件頁數(shù)： | 6/11頁 |
| 文件大?。?/td> | 590K |
| 代理商： | DS1094L |
D
Detailed Description
The DS1094L consists of a master oscillator, prescaler,
phase generator, and triangle-wave generator (used to
dither the master oscillator), which are all programma-
ble using the 2-wire interface and stored in NV memory.
Master Oscillator
The master oscillator is responsible for generating the
timing (frequency) of the outputs. The master oscillator
frequency, f
MOSC
, can be programmed anywhere
between 1MHz to 2MHz in 100kHz steps. The master
oscillator is programmed using the DAC register. The four
MSBs of the DAC register are don’t cares, while the four
LSBs (D3 to D0) are the DAC value. The master oscillator
frequency is determined using the following equation:
f
MOSC
= 1MHz + (DAC value x 100kHz)
Valid values for DAC are 0 to 10 (dec). DAC values
greater than 10 exceed the 2MHz limit and are not per-
mitted.
The master oscillator also determines the spread-spec-
trum dither frequency. This is described in
the Triangle
Wave Generator
section.
Multiphase Spread-Spectrum EconOscillator
6
_____________________________________________________________________
GND
MASTER
OSCILLATOR
1MHz TO 2MHz
PRESCALER
DIVIDE BY
1, 2, 4, OR 8
TRIANGLE
WAVE
GENERATOR
2-WIRE
SERIAL
INTERFACE
TWO/THREE/
FOUR-PHASE
GENERATOR
DAC
PRESCALER
ADDR
D0
D1
D2
D3
X
X
X
X
P0
P1
J0
J1
PH0
PH1
D0
D1
A0
A1
A2
WC
X
X
X
X
V
CC
V
CC
SCL
SDA
DITHER RATE
DITHER %
EEPROM
WRITE EE
COMMAND
OUT2
OUT1
OUT3
OUT4
2-WIRE ADDRESS BITS
PHASE SELECT
PRESCALER SETTING
EEPROM WRITE CONTROL
CONTROL REGISTERS
DAC SETTING
f
MOSC
f
OSC
f
MOSC
f
MOD
f
OUT
DS1094L
Functional Diagram
DAC VALUE (dec)
0
1
2
—
10
11 to 15
DAC REGISTER
00h
01h
02h
—
0Ah
0Bh to 0Fh
f
MOSC
1.0MHz
1.1MHz
1.2MHz
—
2.0MHz
Reserved
Table 1. Master Oscillator Settings
BITS P1, P0
00
01
10
11
DIVISOR
2
0
2
1
2
2
2
3
f
OSC
=
f
MOSC
/1
f
MOSC
/2
f
MOSC
/4
f
MOSC
/8
Table 2. Prescaler Settings
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1094LU-350+ | 制造商:Maxim Integrated Products 功能描述: |
| DS1094LU-42M | 功能描述:可編程振蕩器 Multiphase Spread Spctrm EconOscillatr RoHS:否 制造商:IDT 封裝 / 箱體:5 mm x 7 mm x 1.5 mm 頻率:15.476 MHz to 866.67, 975 MHz to 1300 MHz 頻率穩(wěn)定性:+/- 50 PPM 電源電壓:3.63 V 負載電容:10 pF 端接類型:SMD/SMT 輸出格式:LVPECL 最小工作溫度:- 40 C 最大工作溫度:+ 85 C 尺寸:7 mm W x 5 mm L x 1.5 mm H 封裝: |
| DS1094LU-42M+ | 功能描述:可編程振蕩器 Multiphase Spread Spctrm EconOscillatr RoHS:否 制造商:IDT 封裝 / 箱體:5 mm x 7 mm x 1.5 mm 頻率:15.476 MHz to 866.67, 975 MHz to 1300 MHz 頻率穩(wěn)定性:+/- 50 PPM 電源電壓:3.63 V 負載電容:10 pF 端接類型:SMD/SMT 輸出格式:LVPECL 最小工作溫度:- 40 C 最大工作溫度:+ 85 C 尺寸:7 mm W x 5 mm L x 1.5 mm H 封裝: |
| DS1094LU-42M+T | 功能描述:可編程振蕩器 Multiphase Spread Spctrm EconOscillatr RoHS:否 制造商:IDT 封裝 / 箱體:5 mm x 7 mm x 1.5 mm 頻率:15.476 MHz to 866.67, 975 MHz to 1300 MHz 頻率穩(wěn)定性:+/- 50 PPM 電源電壓:3.63 V 負載電容:10 pF 端接類型:SMD/SMT 輸出格式:LVPECL 最小工作溫度:- 40 C 最大工作溫度:+ 85 C 尺寸:7 mm W x 5 mm L x 1.5 mm H 封裝: |
| DS1099U-01M | 功能描述:可編程振蕩器 Low-Frequency Dual EconOscillator RoHS:否 制造商:IDT 封裝 / 箱體:5 mm x 7 mm x 1.5 mm 頻率:15.476 MHz to 866.67, 975 MHz to 1300 MHz 頻率穩(wěn)定性:+/- 50 PPM 電源電壓:3.63 V 負載電容:10 pF 端接類型:SMD/SMT 輸出格式:LVPECL 最小工作溫度:- 40 C 最大工作溫度:+ 85 C 尺寸:7 mm W x 5 mm L x 1.5 mm H 封裝: |
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