General Description
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.
Applications
Printers
Copiers
PCs
Computer Peripherals
Cell Phones
Cable Modems
Features
o User-Programmable Square-Wave Generator
o Frequencies Programmable from 260kHz to
133MHz
o 2% or 4% Selectable Dithered Output
o Glitchless Output-Enable Control
o 2-Wire Serial Interface
o Nonvolatile Settings
o 5V Supply
o No External Timing Components Required
o Power-Down Mode
o 10kHz Master Frequency Step Size
o EMI Reduction
DS1086
Spread-Spectrum EconOscillator
________________________________________________________________
Maxim Integrated Products
1
PDN
OEGND
1
2
8
7
SCL
SDASPRD
V
CC
OUT
µSOP/SO
TOP VIEW
3
4
6
5
DS1086
Pin Configuration
Ordering Information
XTL1/OSC1
MICRO-
PROCESSOR
XTL2/OSC2
DITHERED 260kHz TO
133MHz OUTPUT
DECOUPLING CAPACITORS
(0.1µF and 0.01µF)
*SDA AND SCL CAN BE CONNECTED DIRECTLY HIGH IF THE DS1086 NEVER NEEDS
TO BE PROGRAMMED IN-CIRCUIT, INCLUDING DURING PRODUCTION TESTING.
SPRD
OUT
V
CC
V
CC
V
CC
GND
N.C.
SCL*
SDA*
PDN
OE
DS1086
Typical Operating Circuit
19-6224; Rev 2; 3/12
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.
Note: Contact the factory for custom settings.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
PART TEMP RANGE PIN-PACKAGE
DS1086U 0°C to +7C 8 µSOP
DS1086U+ 0°C to +7C 8 µSOP
DS1086Z 0°C to +7C 8 SO
DS1086Z+ 0°C to +7C 8 SO
EconOscillator is a trademark of Maxim Integrated Products, Inc.
DS1086
Spread-Spectrum EconOscillator
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED DC OPERATING CONDITIONS
(V
CC
= 5V ±5%, T
A
= 0°C to +70°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage V
CC
(Note 1) 4.75 5.00 5.25 V
High-Level Input Voltage
(SDA, SCL)
V
IH
0.7 x
V
CC
V
CC
+
0.3
V
Low-Level Input Voltage
(SDA, SCL)
V
IL
-0.3
0.3 x
V
CC
V
High-Level Input Voltage
(SPRD, PDN, OE)
V
IH
2
V
CC
+
0.3
V
Low-Level Input Voltage
(SPRD, PDN, OE)
V
IL
-0.3 0.8 V
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 5V ±5%, T
A
= 0°C to +70°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
High-Level Output Voltage (OUT) V
OH
I
OH
= -4mA, V
CC
= min 2.4 V
Low-Level Output Voltage (OUT) V
OL
I
OL
= 4mA 0.4 V
High-Level Input Current I
IH
V
CC
= 5.25V 1 µA
Low-Level Input Current I
IL
V
IL
= 0V -1 µA
Supply Current (Active)
I
CC
C
L
= 15pF (output at default frequency) 35 mA
Standby Current (Power-Down) I
CCQ
Power-down mode 35 µA
Voltage on V
CC
Relative to Ground ......................-0.5V to +6.0V
Voltage on SPRD, PDN, OE, SDA,
SCL Relative to Ground (See Note 1).......-0.5 to (V
CC
+ 0.5V)
Continuous Power Dissipation (T
A
= +70°C)
µSOP (derate 4.5mW/°C above +70°C)........................362mW
SO (derate 5.9mW/°C above +70°C).........................470.6mW
Junction Temperature......................................................+150°C
Operating Temperature Range...............................0°C to +70°C
Storage Temperature Range .............................-55°C to +125°C
Soldering Temperature (reflow)
Lead(Pb)-free................................................................+260°C
Containing lead(Pb) .....................................................+240°C
Note 1: This voltage must not exceed 6.0V.
DS1086
Spread-Spectrum EconOscillator
_______________________________________________________________________________________ 3
MASTER OSCILLATOR CHARACTERISTICS
(V
CC
= 5V ±5%, T
A
= 0°C to +70°C.)
PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS
Master Oscillator Range f
OSC
(Note 2) 66 133 MHz
Default Master Oscillator Frequency f
0
97.1 MHz
Default frequency (f
0
) -0.75 +0.75
Master Oscillator Frequency
Tolerance
f
0
f
0
V
CC
= 5V,
T
A
= +25°C
(Notes 3,17)
DAC step size -0.75 +0.75
%
Default frequency -0.75 +0.75
Voltage Frequency Variation
f
V
f
0
Over voltage range,
T
A
= +25°C (Note 4)
DAC step size -0.75 +0.75
%
Default frequency -0.5 +0.5
133MHz -0.5 +0.5Temperature Frequency Variation
f
T
f
0
Over temperature
range, V
CC
= 5V
(Note 5)
66MHz -1.0 +1.0
%
Prescaler bit J0 = 1 (Note 6) 2
Dither Frequency Range
f
f
0 Prescaler bit J0 = 0 (Note 6) 4
%
Integral Nonlinearity of Frequency
DAC
INL Entire range (Note 7) -0.4 +0.4 %
DAC Step Size
between two consecutive DAC values
(Note 8)
10 kHz
DAC Span
Frequency range for one offset setting
(see Table 2)
10.24 MHz
DAC Default Factory default register setting 500 decimal
Offset Step Size
between two consecutive offset values
(see Table 2)
5.12 MHz
Offset Default OS
Factory default OFFSET register setting
(5 LSBs) (see Table 2)
RANGE
(5 LSBs of
RANGE register)
hex
Dither Rate f
0
/4096 Hz

DS1086U-266+

Mfr. #:
Manufacturer:
Maxim Integrated
Description:
Clock Generators & Support Products 5V Spread-Spectrum EconOscillator
Lifecycle:
New from this manufacturer.
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