DS1087L Fast Delivery |IC PHOENIX CO.,LIMITED

DS1087L ,3.3V Spread-Spectrum EconOscillatorApplications♦ Power-Down ModePrinters♦ Programmable Output Power-Down/Disable ModeCopiersPCsCompute ..
DS1087LU-266+ ,3.3V Spread-Spectrum EconOscillatorApplications♦ Power-Down ModePrinters♦ Programmable Output Power-Down/Disable ModeCopiersPCsCompute ..
DS1087LU-266+T&R ,3.3V Spread-Spectrum EconOscillatorELECTRICAL CHARACTERISTICS(V = 2.7V to 3.6V, T = -40°C to +85°C.)CC APARAMETER SYMBOL CONDITION MIN ..
DS1088 ,Fixed-Frequency EconOscillator™Electrical Characteristics(V = 2.7V to 3.6V, T = -20°C to +85°C, unless otherwise noted.)CC A PARAM ..
DS1088L ,Low-Cost Fixed-Frequency EconOscillatorFeaturesThe DS1088L is a low-cost clock generator that pro-♦ Factory-Programmed, Square-Wave Genera ..
DS1088LU-02 ,Low-Cost Fixed-Frequency EconOscillatorApplications♦ Power-Down ModePrinters♦ 1.0% Frequency Tolerance Over Temperature Copiersand Voltage ..
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DS1087L
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.
Applications
Printers
Copiers
PCs
Computer Peripherals
Cell Phones
Cable Modems
FeaturesFactory Programmed Square-Wave Generator
from 130kHz to 66.6MHzNo External Timing Components RequiredEMI Reduction2.7V to 3.6V SupplyUser Programmable Down to 130kHz with Divider
(Dependent on Master Oscillator Frequency)2% or 4% Selectable Dithered Output Glitchless Output-Enable Control2-Wire Serial InterfaceNonvolatile SettingsPower-Down ModeProgrammable Output Power-Down/Disable Mode
DS1087L
3.3V Spread-Spectrum EconOscillator
PDNGND
SCL
SDASPRD
VCC
OUT
μSOP (118 mils)
TOP VIEW
DS1087L
Pin Configuration
Ordering Information
Rev 1; 11/03
PARTTEMP RANGEPIN-PACKAGE
DS1087LU-yxx-40°C to +85°C8 µSOP (118 mils)
EconOscillator is a trademark of Dallas Semiconductor.
Typical Operating Circuits appear at end of data sheet.
Standard Frequency Options
PARTFREQUENCY (MHz)SPREAD (%)
DS1087LU-2022.04802
DS1087LU-4022.04804
DS1087LU-21010.02
DS1087LU-21616.62
DS1087LU-26666.62
DS1087LU-46666.64
DS1087LU-yxxFixed up to 66.62 or 4
Custom frequencies and over 20 standard frequencies avail-
able, contact factory.
DS1087L
3.3V Spread-Spectrum EconOscillator
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED DC OPERATING CONDITIONS
(VCC= 2.7V to 3.6V, TA= -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.
PARAMETERSYMBOLCONDITIONMINTYPMAXUNITS
Supply VoltageVCC(Note 1)2.73.6V
High-Level Input Voltage
(SDA, SCL, SPRD, PDN, OE)VIH0.7 x
VCC
VCC +
0.3V
Low-Level Input Voltage
(SDA, SCL, SPRD, PDN, OE)VIL-0.30.3 x
VCCV
DC ELECTRICAL CHARACTERISTICS
(VCC= 2.7V to 3.6V, TA= -40°C to +85°C.)
PARAMETERSYMBOLCONDITIONMINTYPMAXUNITS
High-Level Output Voltage (OUT)VOHIOH = -4mA, VCC = min2.4V
Low-Level Output Voltage (OUT)VOLIOL = 4mA0.4V
VOL13mA sink current00.4Low-Level Output Voltage (SDA)VOL26mA sink current00.6V
High-Level Input CurrentIIHVCC = 3.6V1µA
Low-Level Input CurrentIILVIL = 0-1µA
Supply Current (Active)ICCCL = 15pF (output at f0)15mA
Standby Current (Power-Down)ICCQPower-down mode5µA
Voltage Range on VCCRelative 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
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
MASTER OSCILLATOR CHARACTERISTICS
(VCC= 2.7V to 3.6V, TA= -40°C to +85°C.)
PARAMETERSYMBOLCONDITIONMINTYPMAXUNITS
Master Oscillator Range
Availablef033.366.6MHz
Master Oscillator Frequency
Tolerance f 0 VCC = 3.3V, TA = +25°C (Notes 2, 13)-0.5+0.5%
Voltage Frequency
Variation f VOver voltage range, TA = +25°C (Note 3)-0.75+0.75%
Temperature Frequency Variation∆ f T0°C to +70°C, VCC = 3.3V (Note 4)-0.5+0.5%
Temperature Frequency Variation∆ f T-40°C to +85°C, VCC = 3.3V (Note 4)-1.5+0.5%
Prescaler bit J0 = 1 (Note 5)2Dither Frequency RangePrescaler bit J0 = 0 (Note 5)4%
Dither Ratef0 / 4096Hz
AC ELECTRICAL CHARACTERISTICS
(VCC= 2.7V to 3.6V, TA= -40°C to +85°C.)
PARAMETERSYMBOLCONDITIONMINTYPMAXUNITS
Frequency Stable After
PRESCALER Change1period
Power-Up TimetPOR +
tSTAB(Note 6)0.10.5ms
Enable of OUT After Exiting
Power-Down ModetSTAB500μs
OUT Disabled After Entering
Power-Down ModetPDN1ms
Load CapacitanceCL(Note 7)1550pF
Output Duty Cycle (OUT)TA = +25°C4555%
DS1087L
3.3V Spread-Spectrum EconOscillator
AC ELECTRICAL CHARACTERISTICS—2-WIREINTERFACE
(VCC= 2.7V to 3.6V, TA= 0°C to +70°C.)
PARAMETERSYMBOLCONDITIONMINTYPMAXUNITS
Fast mode (Note 8)400SCL Clock FrequencyfSCLStandard mode (Note 8)100kHz
Fast mode (Note 8)1.3Bus Free Time Between a STOP
and START ConditiontBUFStandard mode (Note 8)4.7µs
Fast mode (Notes 8 and 9)0.6Hold Time (repeated) START
ConditiontHD:STAStandard mode (Notes 8 and 9)4.0µs
Fast mode (Note 8)1.3LOW Period of SCLtLOWStandard mode (Note 8)4.7µs
Fast mode (Note 8)0.6HIGH Period of SCLtHIGHStandard mode (Note 8)4.0µs
Fast mode0.6Setup Time for a Repeated
STARTtSU:STAStandard mode4.7µs
Fast mode (Notes 8, 10, and 11)00.9Data Hold TimetHD:DATStandard mode (Notes 8, 10, and 11)00.9µs
Fast mode (Note 8)100Data Setup TimetSU:DATStandard mode (Note 8)250ns
Fast mode (Note 12)20 + 0.1CB300Rise Time of Both SDA and SCL
SignalstRStandard mode (Note 12)20 + 0.1CB1000ns
Fast mode (Note 12)20 + 0.1CB300Fall Time of Both SDA and SCL
SignalstFStandard mode (Note 12)20 + 0.1CB1000ns
Fast mode0.6Setup Time for STOPtSU:STOStandard mode4.0µs
Capacitive Load for Each BusCB(Note 12)400pF
NV Write Cycle TimetWR10ms
Input CapacitanceCI5pF
NONVOLATILEMEMORYCHARACTERISTICS
(VCC= 2.7V to 3.6V)
PARAMETERSYMBOLCONDITIONMINTYPMAXUNITS
Writes+70°C10,000
DS1087L
3.3V Spread-Spectrum EconOscillator
Note 1:All voltages are referenced to ground.
Note 2:This is the absolute accuracy of the master oscillator frequency at the default settings.
Note 3:This is the change that is observed in master oscillator frequency with changes in voltage from nominal voltage at = +25°C.
Note 4:This is the percentage frequency change from the +25°C frequency due to temperature at VCC= 3.3V.
Note 5:The dither deviation of the master oscillator frequency is unidirectional and lower than the undithered frequency.
Note 6:This indicates the time elapsed between power-up and the output becoming active. An on-chip delay is intentionally
introduced to allow the oscillator to stabilize. tstabis equivalent to approximately 512 master clock cycles and depends
on the programmed master oscillator frequency.
Note 7:Output voltage swings may be impaired at high frequencies combined with high output loading.
Note 8:A fast-mode device can be used in a standard-mode system, but the requirement tSU:DAT> 250ns must then be met. This
is automatically the case if the device does not stretch the LOW period of the SCL signal. If such a device does stretch
the LOW period of the SCL signal, it must output the next data bit to the SDA line at least tR MAX+ tSU:DAT= 1000ns +
250ns = 1250ns before the SCL line is released.
Note 9:After this period, the first clock pulse is generated.
Note 10:A device must internally provide a hold time of at least 300ns for the SDA signal (referred to as the VIH MINof the SCL sig-
nal) to bridge the undefined region of the falling edge of SCL.
Note 11:The maximum tHD:DATneed only be met if the device does not stretch the LOW period (tLOW) of the SCL signal.
Note 12:CB—total capacitance of one bus line, timing referenced to 0.9 x VCCand 0.1 x VCC.
Note 13:Typical frequency shift due to aging is ±0.5%. Aging stressing includes Level 1 moisture reflow preconditioning (24hr
+125°C bake, 168hr 85°C/85%RH moisture soak, and 3 solder reflow passes +240 +0/-5°C peak) followed by 1000hr
max VCCbiased 125°C HTOL, 1000 temperature cycles at -55°C to +125°C, and 168hr 121°C/2 ATM Steam/Unbiased
Autoclave.
Typical Operating Characteristics
(VCC= 3.3V, TA= +25°C, unless otherwise noted.)
ACTIVE SUPPLY CURRENT
vs. TEMPERATURE
DS1087L toc01
TEMPERATURE (°C)
CURRENT (mA)706050403020100-10-20-30
VCC = 3.3V
FREQUENCY = 66.6MHz
OE = PDN = VCC
15pF LOAD
8.2pF LOAD
4.7pF LOAD
UNLOADED
VOLTAGE (V)
ACTIVE SUPPLY CURRENT
vs. VOLTAGE
DS1087L toc02
CURRENT (mA)
FREQUENCY = 66.6MHz
OUTPUT UNLOADED
OE = PDN = VCC
SUPPLY CURRENT vs. PRESCALER
DS1087L toc03
PRESCALER (DECIMAL)
CURRENT (mA)
OUTPUT UNLOADED
3.6V
3.3V
2.7V
DS1087L
3.3V Spread-Spectrum EconOscillator
FREQUENCY % CHANGE vs.
SUPPLY VOLTAGE
DS1087L toc07
VOLTAGE (V)
FREQUENCY % CHANGE (FROM 3.3V)
OUTPUT LOADED WITH
12pF OSCILLOSCOPE PROBE
FREQUENCY = 66.6MHz
FREQUENCY % CHANGE vs.
TEMPERATURE
DS1087L toc08
TEMPERATURE (°C)
FREQUENCY % CHANGE (FROM 25706050403020100-10-20-30
VCC = 3.3V
FREQUENCY = 66.6MHz
OUTPUT LOADED WITH
12pF OSCILLOSCOPE PROBE
ACTIVE SUPPLY CURRENT
vs. SCL FREQUENCY
SCL FREQUENCY (kHz)
SUPPLY CURRENT (mA)
DS1087L toc09
VCC = SDA = 3.3V
FREQUENCY = 66.6MHz
OUTPUT UNLOADED
DUTY CYCLE vs. VOLTAGE
DS1087L toc10
VOLTAGE (V)
DUTY CYCLE (%)
FREQUENCY = 66.6MHz
TA = +25°C
OUTPUT LOADED WITH
12pF OSCILLOSCOPE PROBE
TEMPERATURE (°C)5030402010070
DUTY CYCLE vs. TEMPERATURE
DS1087L toc11
DUTY CYCLE (%)
VCC = 3.3V
FREQUENCY = 66.6MHz
OUTPUT LOADED WITH
12pF OSCILLOSCOPE PROBE
Typical Operating Characteristics
(VCC= 3.3V, TA= +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. PRESCALER
DS1087L toc04
PRESCALER (DECIMAL)
CURRENT (mA)
VCC = 3.3V
OUPUT UNLOADED
-40°C, +25°C, +85°C
SUPPLY CURRENT
vs. TEMPERATURE WITH OE = 0
DS1087L toc05
TEMPERATURE (°C)
CURRENT (mA)706050403020100-10-20-30-4090
FREQUENCY = 66.6MHz
VCC = 2.7V
OUTPUT UNLOADED
FREQUENCY = 206.4kHz
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
DS1087L toc06
TEMPERATURE (°C)
CURRENT (705060-10010203040-30-20
VCC = 3.3V
OUTPUT UNLOADED

Partno	Mfg	Dc	Qty	Available	Descript
DS1087L	MAXIM	N/a	60	avai	3.3V Spread-Spectrum EconOscillator