DS1089LU-A29+T Fast Delivery |IC PHOENIX CO.,LIMITED

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DS1089LU-A29+T
3.3V Center Spread-Spectrum EconOscillator™
EconOscillator is a trademark of Maxim Integrated Products, Inc.
Add “/T” for Tape and Reel.
Custom frequencies available, contact factory.
Pin Configuration and Typical Operating Circuits appear at
end of data sheet.
General Description
The DS1089L is a clock generator that produces a
spread-spectrum (dithered) square-wave output of fre-
quencies from 130kHz to 66.6MHz. The DS1089L is
shipped from the factory programmed at a specific
frequency. The DS1089L is pin-for-pin compatible with
the DS1087L, however, the DS1089L dithers at equal
percentages above and below the center frequency. The
user still has access to the internal frequency divider,
selectable ±1%, ±2%, ±4%, or ±8% dithered output, dith-
ering rate, and programmable output power-down/disable
mode through an I2C-compatible programming interface.
All the device settings are stored in nonvolatile (NV)
EEPROM allowing it to operate in stand-alone applica-
tions. The DS1089L also has power-down and output-en-
able control pins for power-sensitive applications.
Applications●Printers●Copiers●Computer Peripherals●POS Terminals●Cable Modems
Features●Factory-Programmed Square-Wave Generator from
33.3MHz to 66.6MHz●Center Frequency Remains Constant Independent of
Dither Percentage●No External Timing Components Required●EMI Reduction●Variable Dither Frequency●User Programmable Down to 130kHz with Divider
(Dependent on Master Oscillator Frequency)●±1%, ±2%, ±4%, or ±8% Selectable Dithered Output●Glitchless Output-Enable Control●I2C-Compatible Serial Interface●Nonvolatile Settings●Power-Down Mode●Programmable Output Power-Down/Disable Mode
PARTFREQUENCY (MHz)SPREAD (±%)DITHER FREQUENCY
DS1089LU-21G14.74561fMOSC/4096
DS1089LU-4CL18.4322fMOSC/4096
DS1089LU-22F24.5761fMOSC/2048
DS1089LU-23C33.31fMOSC/4096
DS1089LU-45050.02fMOSC/4096
DS1089LU-86666.64fMOSC/4096
DS1089LU-yxxFixed up to 66.61, 2, 4, or 8fMOSC/2048 or 4096 or 8192
*See Standard Frequency Options Table.
Ordering Information
PARTTEMP RANGEPIN-PACKAGE
DS1089LU-yxx* -40°C to +85°C8 µSOP (118 mil)
Standard Frequency Options
DS1089L3.3V Center Spread-Spectrum EconOscillator™
Voltage on VCC Relative to Ground ....................-0.5V to +6.0V
Voltage 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.
(VCC = +2.7V to +3.6V, TA = -40°C to +85°C.)
(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
Low-Level Output Voltage (SDA)VOL13mA sink current0.4VVOL26mA sink current0.6
High-Level Input CurrentIIHVIH = VCC1µA
Low-Level Input CurrentIILVIL = 0V-1µA
Supply Current (Active)ICCCL = 15pF, fOUT = fMOSCmax12mA
Standby Current (Power-Down)ICCQPower-down mode10µA
PARAMETERSYMBOLCONDITIONMINTYPMAXUNITS
Supply VoltageVCC(Note 1)2.73.33.6V
High-Level Input Voltage
(SDA, SCL, SPRD, PDN, OE)VIH0.7 x VCCVCC +
0.3V
Low-Level Input Voltage
(SDA, SCL, SPRD, PDN, OE)VIL-0.30.3 x
VCCV
DC Electrical Characteristics
Recommended Operating Conditions
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.
Absolute Maximum Ratings
DS1089L3.3V Center Spread-Spectrum EconOscillator™
MOSC
MOSC∆
MOSC ∆
MOSC ∆
(VCC = +2.7V to +3.6V, TA = -40°C to +85°C.)
(VCC = +2.7V to +3.6V, TA = -40°C to +85°C.)
PARAMETERSYMBOLCONDITIONMINTYPMAXUNITS
Frequency Stable After
PRESCALER Change1Period
Power-Up TimetPOR +
tSTAB(Note 6)40200µs
Enable of OUT After Exiting
Power-Down ModetSTAB(Note 6)512clock
cycles
OUT Disabled After Entering
Power-Down ModetPDN7µs
Load CapacitanceCL1550pF
Output Duty Cycle (fOUT)50%
PARAMETERSYMBOLCONDITIONMINTYPMAXUNITS
Internal Master Oscillator
FrequencyfMOSC33.366.6MHz
Master Oscillator Frequency
Tolerance
VCC = 3.3V,
TA = +25°C (Notes 2, 10)-0. 5+0. 5%
Voltage Frequency
Variation TA = +25°C (Note 3)-0.75+0.75%
Temperature Frequency Variation
(Note 4)
VCC = 3.3V,
fOUT = fMOSCmax
TA = 0°C to +85°C-0.75+0.75%TA = -40°C to 0°C-2.00+0.75
Dither Frequency Range
(Note 5)
J3 = J2 = GND ±1J3 = GND, J2 = VCC±2
J3 = VCC, J2 = GND ±4
J3 = J2 = VCC ±8
Dither Frequency
(Note 5)fMOD
J1 = GND, J0 = VCC fMOSC / 2048J1 = VCC, J0 = GND fMOSC / 4096
J1 = J0 = VCCfMOSC / 8192
AC Electrical Characteristics
Master Oscillator Characteristics
DS1089L3.3V Center 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 with spread disabled.
Note 3: This is the change that is observed in master oscillator frequency with changes in voltage at TA = +25°C.
Note 4: This is the change that is observed in master oscillator frequency with changes in temperature at VCC = 3.3V.
Note 5: The dither deviation of the master oscillator frequency is bidirectional and results in an output frequency centered at the
undithered frequency.
Note 6: This indicates the time elapsed between power-up and the output becoming active. An on-chip delay is intentionally intro-
duced to allow the oscillator to stabilize. tSTAB is equivalent to 512 master clock cycles and will depend on the programmed
master oscillator frequency.
Note 7: Timing shown is for fast-mode (400kHz) operation. This device is also backward compatible with I2C standard-mode timing.
Note 8: CB—total capacitance of one bus line in picofarads.
Note 9: EEPROM write time applies to all the EEPROM memory and SRAM shadowed EEPROM memory when WC = 0.
The EEPROM write time begins after a stop condition occurs.
Note 10: Typical frequency shift due to aging is ±0.25%. Aging stressing includes Level 1 moisture reflow conditioning (24hr) +125°C
bake, 168hr +85°C/85°RH moisture soak, and three solder reflow passes +269 +0/-5°C peak) followed by 408hr max VCC
biased 125°C HTOL, 500 temperature cycles at -55°C to +125°C, 96hr +130°C/85%RH/3,6V HAST and 168hr +121°C/2
ATM Steam/Unbiased Autoclave.
(VCC = +2.7V to +3.6V.)
(VCC = +2.7V to +3.6V, TA = -40°C to +85°C, unless otherwise noted. Timing referenced to VIL(MAX) and VIH(MIN).)
PARAMETERSYMBOLCONDITIONMINTYPMAXUNITS
Writes+70°C10,000
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
SCL Clock FrequencyfSCL(Note 7)0400kHz
Bus Free Time Between Stop and
Start ConditionstBUF1.3µs
Hold Time (Repeated) Start
ConditiontHD:STA0.6µs
Low Period of SCLtLOW1.3µs
High Period of SCLtHIGH0.6µs
Data Hold TimetHD:DAT00.9µs
Data Setup TimetSU:DAT100ns
Start Setup TimetSU:STA0.6µs
SDA and SCL Rise TimetR(Note 8)20 + 0.1CB300ns
SDA and SCL Fall TimetF(Note 8)20 + 0.1CB300ns
Stop Setup TimetSU:STO0.6µs
SDA and SCL Capacitive
LoadingCB(Note 8)400pF
EEPROM Write TimetWR(Note 9)1020ms
Nonvolatile Memory Characteristics
AC Electrical Characteristics—I2c Interface
DS1089L3.3V Center Spread-Spectrum EconOscillator™
(VCC = 3.3V, TA = +25°C, unless otherwise noted.)
FREQUENCY % CHANGE
vs. TEMPERATURE
DS 1089L toc06
TEMPERATURE (ºC)
FREQUENCY CHANGE (%)66MHz
50MHz
130kHz
33MHz
VCC = 3.3V
FREQUENCY % CHANGE
vs. SUPPLY VOLTAGE
DS 1089L toc05
SUPPLY VOLTAGE (V)
FREQUENCY CHANGE (%)
66MHz
50MHz
130kHz
33MHzTA = +25ºC
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
DS 1089L toc04
TEMPERATURE (ºC)
SUPPLY CURRENT (
VCC = 3.3V,
PDN = GND100010010
SUPPLY CURRENT
vs. PRESCALER
DS 1089L toc03
PRESCALE DIVIDER (DECIMAL)
SUPPLY CURRENT (mA)3.6V
3.3V
2.7V
TA = +25ºC,
fMOSC = 50MHz,
OUTPUT UNLOADED
ACTIVE SUPPLY CURRENT
vs. TEMPERATURE
DS 1089L toc02
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
66MHz
50MHz130kHz
33MHz
TA = +25ºC,
OUTPUT
UNLOADED
ACTIVE SUPPLY CURRENT
vs. SUPPLY VOLTAGE
DS 1089L toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
66MHz
50MHz130kHz
33MHz
TA = +25ºC,
OUTPUT
UNLOADED
Typical Operating Characteristics
DS1089L3.3V Center Spread-Spectrum EconOscillator™
(VCC = 3.3V, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
PINNAMEFUNCTIONOUTOscillator OutputSPRDDither Enable. When the pin is high, the dither is enabled. When the pin is low, the dither is disabled.VCCPower SupplyGNDGroundOEOutput Enable. When the pin is high, the output buffer is enabled. When the pin is low, the output is disabled
but the internal master oscillator is still on.PDNPower-Down. When the pin is high, the master oscillator is enabled. When the pin is low, the master oscillator
and the output buffer are disabled (power-down mode).SDAI2C Serial Data. This pin is for serial data transfer to and from the device.SCLI2C Serial Clock. This pin is used to clock data into and out of the device.
DUTY CYCLE
vs. SUPPLY VOLTAGE
DS 1089L toc07
SUPPLY VOLTAGE (V)
DUTY CYCLE (%)
66MHz
50MHz
130kHz
33MHz
TA = +25ºC
DUTY CYCLE vs. TEMPERATURE
DS 1089L toc08
TEMPERATURE (ºC)
DUTY CYCLE (%)
66MHz50MHz
130kHz
33MHz
VCC = 3.3V
SPECTRUM COMPARISON
(120kHz BW, SAMPLE DETECT)
DS 1089L toc09
FREQUENCY (MHz)
POWER SPECTRUM (dBm)
NO SPREAD1%8%
fMOSC = 50MHz,
DITHER RATE = fMOSC / 4096
Pin Description
DS1089L3.3V Center Spread-Spectrum EconOscillator™
Detailed Description
Master Oscillator
The internal master oscillator is capable of generating
a square wave with a 33.3MHz to 66.6MHz frequency
range. The master oscillator frequency (fMOSC) is factory
programmed, and is specified in the Ordering Information.
Prescaler
The user can program the prescaler divider to produce an
output frequency (fOUT) as low as 130kHz using bits P0,
P1, P2, and P3 in the PRESCALER register. The output
frequency can be calculated using Equation 1. Any value
programmed greater than 28 will be decoded as 28. See
Table 1 for prescaler divider settings.
Equation 1
MOSCOSCxOutput Frequency (Hz) f =
where x = P3, P2, P1, P0
BITS P3, P2,
P1, P02x = fOUT = fOSC
00001fMOSC
00012fMOSC / 2
00104fMOSC / 4
00118fMOSC / 8
010016fMOSC / 16
010132fMOSC / 32
011064fMOSC / 64
0111128fMOSC / 128
1000256fMOSC / 256
1111256fMOSC / 256
Table 1. Prescaler Divider Settings
Block Diagram
FACTORY-
PROGRAMMED
MASTER
OSCILLATOR
33.3MHz TO
66.6MHz
PRESCALER
DIVIDE BY 1, 2, 4,
8, 16, 32, 64,
128, OR 256
TRIANGLE-
WAVE
GENERATOR
I2C SERIAL
INTERFACE
PRESCALER
ADDRP1P2P3XLO/
HIZJ0J1A1A2WCXOEJ2J3
VCC
VCC
SCL
SDA
DITHER RATE
DITHER %
EEPROM
WRITE EE
COMMAND
OUT
I2C
ADDRESS
BITS
PRESCALER SETTING
EEPROM
WRITE
CONTROL
CONTROL REGISTERS
fMOD
fOSCfMOSC
fMOSCOUTSYNCED
OUTPUT
BUFFER
OUTPUT CONFIGURATION
OUTPUT CONTROL
PDN
GND
SPRD
S/W GATED OUTPUT
H/W GATED OUTPUTDS1089L
DS1089L3.3V Center Spread-Spectrum EconOscillator™

Partno	Mfg	Dc	Qty	Available	Descript
DS1089LU-A29+T \|DS1089LUA29T	DALLA	N/a	6000	avai	3.3V Center Spread-Spectrum EconOscillator™