DS1086U+ Maxim Integrated Products, DS1086U+ Datasheet

IC ECONOSCILLATOR SS 8-USOP

DS1086U+

Manufacturer Part Number
DS1086U+
Description
IC ECONOSCILLATOR SS 8-USOP
Manufacturer
Maxim Integrated Products
Series
EconOscillator™r
Type
Spread Spectrum Clock Generatorr
Datasheet

Specifications of DS1086U+

Pll
No
Input
Clock
Output
Clock
Number Of Circuits
1
Ratio - Input:output
2:1
Differential - Input:output
No/No
Divider/multiplier
Yes/No
Voltage - Supply
4.75 V ~ 5.25 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Frequency-max
133MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The DS1086 EconOscillator™ is a programmable clock
generator that produces a spread-spectrum (dithered)
square-wave output of frequencies from 260kHz to
133MHz. The selectable dithered output reduces radi-
ated-emission peaks by dithering the frequency 2% or
4% below the programmed frequency. The DS1086 has
a power-down mode and an output-enable control for
power-sensitive applications. All the device settings are
stored in nonvolatile (NV) EEPROM memory allowing it
to operate in stand-alone applications.
Rev 1; 9/03
EconOscillator is a trademark of Maxim Integrated Products, Inc.
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.
*SDA AND SCL CAN BE CONNECTED DIRECTLY HIGH IF THE DS1086 NEVER NEEDS
TO BE PROGRAMMED IN-CIRCUIT, INCLUDING DURING PRODUCTION TESTING.
PROCESSOR
XTL1/OSC1
XTL2/OSC2
MICRO-
Printers
Copiers
PCs
Computer Peripherals
Cell Phones
Cable Modems
DITHERED 260kHz TO
133MHz OUTPUT
DECOUPLING CAPACITORS
N.C.
Typical Operating Circuit
(0.1μF and 0.01μF)
V
CC
General Description
OUT
SPRD
V
GND
CC
DS1086
Applications
Spread-Spectrum EconOscillator
______________________________________________ Maxim Integrated Products
SDA*
SCL*
PDN
OE
V
CC
♦ User-Programmable Square-Wave Generator
♦ Frequencies Programmable from 260kHz to
♦ 2% or 4% Selectable Dithered Output
♦ Glitchless Output-Enable Control
♦ 2-Wire Serial Interface
♦ Nonvolatile Settings
♦ 5V Supply
♦ No External Timing Components Required
♦ Power-Down Mode
♦ 10kHz Master Frequency Step Size
♦ EMI Reduction
* Future Product
DS1086U*
DS1086Z
133MHz
PART
TOP VIEW
SPRD
GND
OUT
V
CC
TEMP RANGE
0°C to +70°C
0°C to +70°C
1
2
4
3
Ordering Information
μSOP/SO
DS1086
Pin Configuration
6
8
7
5
SCL
SDA
PDN
OE
PIN-PACKAGE
8 μSOP
8 SO
Features
1

Related parts for DS1086U+

DS1086U+ Summary of contents

Page 1

... AND SCL CAN BE CONNECTED DIRECTLY HIGH IF THE DS1086 NEVER NEEDS TO BE PROGRAMMED IN-CIRCUIT, INCLUDING DURING PRODUCTION TESTING. EconOscillator is a trademark of Maxim Integrated Products, Inc. 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. ...

Page 2

Spread-Spectrum EconOscillator ABSOLUTE MAXIMUM RATINGS Voltage on V Relative to Ground ......................-0.5V to +6.0V CC Voltage on SPRD, PDN, OE, SDA, SCL Relative to Ground (See Note 1).......-0 Note 1: This voltage must not exceed 6.0V. Stresses beyond ...

Page 3

MASTER OSCILLATOR CHARACTERISTICS ( ±5 0°C to +70°C PARAMETER SYMBOL Master Oscillator Range Default Master Oscillator Frequency Master Oscillator Frequency Tolerance Voltage Frequency Variation Temperature Frequency Variation Dither Frequency Range Integral Nonlinearity of Frequency ...

Page 4

Spread-Spectrum EconOscillator AC ELECTRICAL CHARACTERISTICS ( ±5 0°C to +70°C PARAMETER SYMBOL Frequency Stable After Prescaler Change Frequency Stable After DAC or Offset Change Power-Up Time t por Enable of OUT After Exiting Power-Down ...

Page 5

AC ELECTRICAL CHARACTERISTICS: 2-WIRE INTERFACE (continued ±5 0°C to +70°C PARAMETER SYMBOL Setup Time for STOP t SU:STO Capacitive Load for Each Bus Line NV Write-Cycle Time Input Capacitance Note 1: All voltages ...

Page 6

Spread-Spectrum EconOscillator (V = 5.0V unless otherwise noted) ° SUPPLY CURRENT vs. TEMPERATURE TEMPERATURE (°C) SUPPLY ...

Page 7

PIN NAME 1 OUT Oscillator Output 2 SPRD Dither Enable. When the pin is high, the dither is enabled. When the pin is low, the dither is disabled Power Supply CC 4 GND Ground Output Enable. When the ...

Page 8

Spread-Spectrum EconOscillator Table 1. Register Summary REGISTER ADDR MSB PRESCALER 02h DAC HIGH 08h b9 b8 DAC LOW 09h b1 b0 OFFSET 0Eh ADDR 0Dh RANGE 37h WRITE ...

Page 9

V CC SDA INTERFACE SCL PDN OE SPRD GND Figure 3. DS1086 Block Diagram The output frequency is determined by the following equation: ( MIN FREQUENCY OF SELECTED OFFSET RANGE + × DAC VALUE kHz STEP SIZE f ...

Page 10

Spread-Spectrum EconOscillator The A0, A1, A2 bits determine the 2-wire slave address. The WC bit determines if the EEPROM written to after register contents have been changed (default), EEPROM is written automatically after ...

Page 11

RANGE register (last five bits). In this example, 12h (18 decimal) was read from the RANGE register for this case is 10h (16 deci- mal). This is the value that is written ...

Page 12

Spread-Spectrum EconOscillator MSB DEVICE DEVICE IDENTIFIER ADDRESS Figure 5. Slave Address SDA t BUF t LOW SCL t HD:STA STOP START Figure 6. 2-Wire AC Characteristics Since the expected output frequency is equal to the ...

Page 13

Each data transfer is initiated with a START condition and terminated with a STOP condition. The number of data bytes transferred between START and STOP con- ditions is not limited, and is determined by the master device. The information is ...

Page 14

... 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. 14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2003 Maxim Integrated Products ...

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