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Dallas Semiconductor
Dallas Semiconductor

DS1087L Datasheet Preview

DS1087L Datasheet

Spread-Spectrum EconOscillator

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DS1087L pdf
Rev 1; 11/03
3.3V Spread-Spectrum EconOscillator
General Description
The DS1087L is a clock generator that produces a
spread-spectrum (dithered) square-wave output of fre-
quencies from 130kHz to 66.6MHz. The DS1087L is
shipped from the factory programmed at a specific fre-
quency and spread-spectrum percentage. The user still
has access to an internal frequency divider, selectable
2% or 4% dithered output, and programmable output
power-down/disable mode through a 2-wire program-
ming interface. All the device settings are stored in non-
volatile (NV) EEPROM allowing it to operate in
stand-alone applications. The DS1087L has power-
down and output-enable control pins for power-sensi-
tive applications.
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Printers
Copiers
PCs
Computer Peripherals
Cell Phones
Cable Modems
Applications
Features
Factory Programmed Square-Wave Generator
from 130kHz to 66.6MHz
No External Timing Components Required
EMI Reduction
2.7V to 3.6V Supply
User Programmable Down to 130kHz with Divider
(Dependent on Master Oscillator Frequency)
2% or 4% Selectable Dithered Output
Glitchless Output-Enable Control
2-Wire Serial Interface
Nonvolatile Settings
Power-Down Mode
Programmable Output Power-Down/Disable Mode
PART
DS1087LU-yxx
Ordering Information
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
8 µSOP (118 mils)
Standard Frequency Options
PART
DS1087LU-202
DS1087LU-402
DS1087LU-210
DS1087LU-216
DS1087LU-266
DS1087LU-466
DS1087LU-yxx
FREQUENCY (MHz)
2.0480
2.0480
10.0
16.6
66.6
66.6
Fixed up to 66.6
SPREAD (%)
2
4
2
2
2
4
2 or 4
Custom frequencies and over 20 standard frequencies avail-
able, contact factory.
EconOscillator is a trademark of Dallas Semiconductor.
Typical Operating Circuits appear at end of data sheet.
TOP VIEW
Pin Configuration
OUT 1
SPRD 2
VCC 3
GND 4
DS1087L
8 SCL
7 SDA
6 PDN
5 OE
µSOP (118 mils)
______________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.



Dallas Semiconductor
Dallas Semiconductor

DS1087L Datasheet Preview

DS1087L Datasheet

Spread-Spectrum EconOscillator

No Preview Available !

DS1087L pdf
3.3V Spread-Spectrum EconOscillator
ABSOLUTE MAXIMUM RATINGS
Voltage Range on VCC Relative to Ground ..........-0.5V to +6.0V
Voltage Range on SPRD, PDN, OE, SDA, SCL
Relative to Ground* ................................-0.5V to (VCC + 0.5V)
Operating Temperature Range ...........................-40°C to +85°C
*This voltage must not exceed 6.0V.
Programming Temperature Range .........................0°C to +70°C
Storage Temperature Range .............................-55°C to +125°C
Soldering Temperature ..................See IPC/JEDEC J-STD-020A
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.
RECOMMENDED DC OPERATING CONDITIONS
(VCC = 2.7V to 3.6V, TA = -40°C to +85°C.)
PARAMETER
Supply Voltage
High-Level Input Voltage
(SDA, SCL, SPRD, PDN, OE)
SYMBOL
VCC (Note 1)
VIH
CONDITION
Low-Level Input Voltage
(SDA, SCL, SPRD, PDN, OE)
VIL
MIN
2.7
0.7 x
VCC
-0.3
TYP
MAX
3.6
VCC +
0.3
0.3 x
VCC
UNITS
V
V
V
DC ELECTRICAL CHARACTERISTICS
(VCC = 2.7V to 3.6V, TA = -40°C to +85°C.)
PARAMETER
High-Level Output Voltage (OUT)
Low-Level Output Voltage (OUT)
Low-Level Output Voltage (SDA)
High-Level Input Current
Low-Level Input Current
Supply Current (Active)
Standby Current (Power-Down)
SYMBOL
VOH
VOL
VOL1
VOL2
IIH
IIL
ICC
ICCQ
CONDITION
IOH = -4mA, VCC = min
IOL = 4mA
3mA sink current
6mA sink current
VCC = 3.6V
VIL = 0
CL = 15pF (output at f0)
Power-down mode
MIN TYP MAX UNITS
2.4 V
0.4 V
0 0.4
V
0 0.6
1 µA
-1 µA
15 mA
5 µA
2 _____________________________________________________________________


Part Number DS1087L
Description Spread-Spectrum EconOscillator
Maker Dallas Semiconductor
Total Page 12 Pages
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DS1087L pdf
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