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DS1087LU-210+

P1-P3P4-P6P7-P9P10-P12
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.
Applications
Printers
Copiers
PCs
Computer Peripherals
Cell Phones
Cable Modems
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
DS1087L
3.3V Spread-Spectrum EconOscillator
______________________________________________ Maxim Integrated Products 1
PDN
OEGND
1
2
8
7
SCL
SDASPRD
V
CC
OUT
µSOP (118 mils)
TOP VIEW
3
4
6
5
DS1087L
Pin Configuration
Ordering Information
Rev 1; 11/03
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.
PART TEMP RANGE PIN-PACKAGE
DS1087LU-yxx -40°C to +85°C 8 µSOP (118 mils)
EconOscillator is a trademark of Dallas Semiconductor.
Typical Operating Circuits appear at end of data sheet.
Standard Frequency Options
PART FREQUENCY (MHz) SPREAD (%)
DS1087LU-202 2.0480 2
DS1087LU-402 2.0480 4
DS1087LU-210 10.0 2
DS1087LU-216 16.6 2
DS1087LU-266 66.6 2
DS1087LU-466 66.6 4
DS1087LU-yxx Fixed up to 66.6 2 or 4
Custom frequencies and over 20 standard frequencies avail-
able, contact factory.
DS1087L
3.3V Spread-Spectrum EconOscillator
2 _____________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED DC OPERATING CONDITIONS
(V
CC
= 2.7V to 3.6V, T
A
= -40°C to +85°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 CONDITION MIN TYP MAX UNITS
Supply Voltage V
CC
(Note 1) 2.7 3.6 V
High-Level Input Voltage
(SDA, SCL, SPRD, PDN, OE)
V
IH
0.7 x
V
CC
V
CC
+
0.3
V
Low-Level Input Voltage
(SDA, SCL, SPRD, PDN, OE)
V
IL
-0.3
0.3 x
V
CC
V
DC ELECTRICAL CHARACTERISTICS
(V
CC
= 2.7V to 3.6V, T
A
= -40°C to +85°C.)
PARAMETER SYMBOL CONDITION 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
V
OL1
3mA sink current 0 0.4
Low-Level Output Voltage (SDA)
V
OL2
6mA sink current 0 0.6
V
High-Level Input Current I
IH
V
CC
= 3.6V 1 µA
Low-Level Input Current I
IL
V
IL
= 0 -1 µA
Supply Current (Active) I
CC
C
L
= 15pF (output at f
0
)15mA
Standby Current (Power-Down) I
CCQ
Power-down mode 5 µA
Voltage Range on V
CC
Relative to Ground ..........-0.5V to +6.0V
Voltage Range on SPRD, PDN, OE, SDA, SCL
Relative to Ground* ................................-0.5V to (V
CC
+ 0.5V)
Operating Temperature Range ...........................-40°C to +85°C
Programming Temperature Range .........................0°C to +70°C
Storage Temperature Range .............................-55°C to +125°C
Soldering Temperature ..................See IPC/JEDEC J-STD-020A
*This voltage must not exceed 6.0V.
DS1087L
3.3V Spread-Spectrum EconOscillator
_____________________________________________________________________ 3
MASTER OSCILLATOR CHARACTERISTICS
(V
CC
= 2.7V to 3.6V, T
A
= -40°C to +85°C.)
PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS
Master Oscillator Range
Available
f
0
33.3 66.6 MHz
Master Oscillator Frequency
Tolerance
∆ f
0
f
0
V
CC
= 3.3V, T
A
= +25°C (Notes 2, 13) -0.5 +0.5 %
Voltage Frequency
Variation
∆ f
V
f
0
Over voltage range, T
A
= +25°C (Note 3) -0.75 +0.75 %
Temperature Frequency Variation
∆
f
T
f
0
0°C to +70°C, V
CC
= 3.3V (Note 4) -0.5 +0.5 %
Temperature Frequency Variation
∆
f
T
f
0
-40°C to +85°C, V
CC
= 3.3V (Note 4) -1.5 +0.5 %
Prescaler bit J0 = 1 (Note 5) 2
Dither Frequency Range
Prescaler bit J0 = 0 (Note 5) 4
%
Dither Rate f
0
/ 4096 Hz
AC ELECTRICAL CHARACTERISTICS
(V
CC
= 2.7V to 3.6V, T
A
= -40°C to +85°C.)
PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS
Frequency Stable After
PRESCALER Change
1 period
Power-Up Time
t
POR
+
t
STAB
(Note 6) 0.1 0.5 ms
Enable of OUT After Exiting
Power-Down Mode
t
STAB
500 µs
OUT Disabled After Entering
Power-Down Mode
t
PDN
1ms
Load Capacitance C
L
(Note 7) 15 50 pF
Output Duty Cycle (OUT) T
A
= +25°C 45 55 %
P1-P3P4-P6P7-P9P10-P12

DS1087LU-210+

Mfr. #:
Buy DS1087LU-210+
Manufacturer:
Maxim Integrated
Description:
Clock Generators & Support Products 3.3V Spread-Spectrum EconOscillator
Lifecycle:
New from this manufacturer.
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