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EEPROM Programmable PLL Die for LVCMOS Crystal Oscillator
IDT5V7855
DATA SHEET
General Description
The IDT5V7855 is a programmable PLL-based clock generator used for crystal oscillator modules. The device incorporates an on-chip crystal oscillator with a programmable capacitor tuning array to support direct connection with fundamental-mode crystals between 16MHz - 50MHz. The capacitor tuning array offers a total of 9 bits of resolution and provides a step of 0.01pF. The device incorporates on-chip non-volatile EEPROM cells which can store all the device settings and maintain them even when there is no power. The serial programming interface is implemented with dual-use pins for the clock and data. The CONT input can be programmed as either a power down input or an output enable input. Crystal oscillator modules using this device can be stocked as blank parts and custom frequencies programmed in package at the last stage before shipping. This enables fast-turn manufacture of custom and standard crystal oscillators without the need for expensive dedicated crystals. The IDT PLL uses a patent-pending fractional multiplier technique to provide ultra-high resolution multiplication and division from input to output with low jitter. In addition, prescaler and postdivider circuits are included to enhance the granularity of clock scaling. The PLL may also be bypassed in order to operate the device as a non-PLL fundamental-mode crystal oscillator for applications that do not require frequency multiplication. The device is fabricated using advance technology and can support both 2.5V and 3.3V operation. The device is small enough to fit into small-footprint crystal oscillators. This is the industry's smallest programmable die and can support crystal oscillator packages as small as 20mm x 16mm.
Features
* * *
Input: 16MHz - 50MHz fundamental mode crystal Output frequency range: 1MHz - 170MHz in PLL mode, 1MHz - 50MHz in non-PLL mode On-chip EEPROM to store device configuration - 19-bit high-resolution fractional programmable multiplier - 3-bit prescaler - 7-bit output divider - 9-bit crystal oscillator tuning capacitor array - Selectable function power down or OE control pin In-package serial programming interface through dual-use pins Full 2.5V and 3.3V operating supply Maximum frequency shift across supply voltage: 1ppm Available in die pack, lead-free RoHS compliant ESD Human Body Model (HBM) and Machine Model (MM): - HBM: 2000V - MM: 200V Small die size: 0.75mm x 0.75mm Supports 20mm x 16mm package size -40C to 85C ambient operating temperature
* * * * * * * *
Functional Block Diagram
xg x2 0
Pad Assignment
VDD 1
OSC
xd
Pre-Scaler
3-bit
PFD
VCO
1
Output Divider
/2
OUT
VDD 2 xd 3
8 OUT
Tuning Cap 9-bit
Fractional Multiplier
19-bit
7-bit xg 4 CONT 5 6 VSS 7 VSS
EEPROM
CONT
Pullup
IDT5V7855 0.75mm x 0.75mm Die
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(c)2010 Integrated Device Technology, Inc.
IDT5V7855 Data Sheet
EEPROM PROGRAMMABLE PLL DIE FOR LVCMOS CRYSTAL OSCILLATOR
Table 1. Pad Descriptions
Number 1, 2 3, 4 5 6, 7 8 Name VDD xd, xg CONT VSS OUT Input Input Power I/O Pullup Type Power Description Power supply pins. Both pads must be bonded. Crystal oscillator interface. xg is the input. xd is the output. Programmable to function as power down or output enable. Serves as VPP and data input during programming mode. Power supply ground. Only one pad should be bonded. Either pad can be used to accommodate optimal bond wire placement Single-ended clock output. Serves as clock input during programming mode.
NOTE: Pullup refers to internal input resistor.
Table 2. Pad Characteristics
Symbol RPULLUP ROUT Parameter Input Pullup Resistor Output Impedance VDD = 3.3V VDD = 2.5V Test Conditions Minimum Typical 51 25 37 Maximum Units k

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IDT5V7855 Data Sheet
EEPROM PROGRAMMABLE PLL DIE FOR LVCMOS CRYSTAL OSCILLATOR
Functional Description
The output frequency of the IDT5V7855 is determined by the crystal frequency and the three programmable divider/multiplier registers: Prescaler (P), Fractional Multiplier (M), and Output Divider (D). The prescaler (P) is a 3-bit integer register while the output divider (D) is a 7-bit integer register. The fractional multiplier (M) is a 19-bit register and has the feature of a fractional component in addition to the integer value. This allows the IDT5V7855 to be programmed to a wide variety of output frequencies from a single input crystal frequency.
Table 3A. Prescaler Table
Crystal Range (MHz) 16 - 50 16 - 50 16 - 50 21.25 - 50 26.5625 - 50 31.875 - 50 37.1875 - 50 Prescaler (P) 1 2 3 4 5 6 7 Phase Detector Frequency (MHz) 16 - 50 8 - 25 5.3333 - 16.6667 5.3125 - 12.5 5.3125 - 10 5.3125 - 8.3333 5.3125 - 7.1429
Figure 1. Simplified Block Diagram
The actual values which may be programmed into the various registers depend on the specified operational ranges of some of the PLL components such as the VCO and crystal oscillator. As shown in tables 5 and 6A, these ranges are: VCO Range: 170MHz to 340MHz XTAL Oscillator Range: 16MHz to 50MHz The minimum value permitted for the feedback register is a function of the minimum VCO frequency and the maximum phase detector reference frequency. The maximum phase detector reference frequency is set by the maximum crystal frequency (50MHz) divided by the minimum prescaler divider (1) and is therefore 50MHz. The feedback fractional multiplier register operational range can be determined as: M Min: 170MHz / 50MHz = 3.4 M Max: 31.9993896 32 The maximum value that can be programmed into the fractional multiplier (all 19 bits "1") is approximately 32 (actual value is 31.99993896). Given the VCO range and the feedback divider range, the minimum phase detector frequency can be determined from the minimum VCO frequency and the maximum feedback divider as: Phase Detector Min: 170MHz / 32 = 5.3125MHz Phase Detector Max: 50MHz The maximum value is set by the specified maximum crystal frequency.
Fractional Multiplier (M)
The Fractional Multiplier (M) is a 19-bit register. The operational range of the fractional multiplier is 3.4 to approximately 32 (actually 31.99993896). The decimal multiplier value obtained from the 19-bit fractional multiplier register can be determined as: M BIN M DEC = --------------16384
MDEC is the fractional multiplier (decimal) value MBIN is the value programmed in the 19-bit register The fractional portion of the fractional multiplier allows a programming frequency resolution to 61/MDEC ppm. Note that higher MDEC values will produce lower ppm error. Examples: For a fractional multiplier register MBIN of 1010101000000000000 binary 348160 M DEC = ------------------- = 21.2500 16384 The ppm resolution (single LSB bit change in the MBIN) for this setting is: 61ppm ------------------ = 2.9ppm 21.25 For a fractional multiplier register MBIN of 0010101010000000000 binary 87040 M DEC = --------------- = 5.3125 16384 The ppm resolution (single LSB bit change in the MBIN) for this setting is: 61ppm ------------------ = 11.5ppm 5.3125
Prescaler (P)
The Prescaler (P) divides down the input crystal frequency prior to the internal phase detector. The prescaler register is a 3-bit register so the possible values which may be programmed are 1 through 7. The specified input crystal frequency range is: 16MHz to 50MHz and the phase detector range is: 5.3125MHz to 50MHz. So the possible settings and ranges are:
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(c)2010 Integrated Device Technology, Inc.
IDT5V7855 Data Sheet
EEPROM PROGRAMMABLE PLL DIE FOR LVCMOS CRYSTAL OSCILLATOR
Output Divider (D)
The Output Divider register is a 7-bit register so the possible values which may be programmed are 1 through 127. Combining the information from the three registers, including the final output divider and the crystal frequency, the output frequency may be derived. The actual frequency produced from a given crystal frequency may be determined as: MDEC FOUT = ( FXTAL ) x -------------------------P x ( D x 2) FOUT FXTAL P D MDEC is the output frequency is the Crystal Frequency is the Prescaler Value is the Output Divider Value is the Fractional Divider (decimal) Value Crystal Range (MHz) 16 - 50 16 - 50 16 - 50 21.25 - 50 26.5625 - 50 Using table 3B, identify the crystal frequency from the given ranges and select the associated prescaler (P) value. The phase detector frequency is then calculated as: F XTAL F PHASE - DET = --------------- P
Table 3B. Crystal Range Table
Prescaler (P) 1 2 3 4 5 6 Phase Detector Frequency (MHz) 16 - 50 8 - 25 5.3333 - 16.6667 5.3125 - 12.5 5.3125 - 10 5.3125 - 8.3333
Fine Frequency Adjustment
The IDT5V7855 also has a fine frequency adjustment capability utilizing adjustable tuning capacitors in the crystal oscillator. These capacitors are set through a tuning capacitor register which is a 9-bit register and the resolution of the tuning capacitance is approximately 0.01pF per bit. The frequency ppm tuning performance can be found by: C1 1 1 FREQ ( ppm ) = ------- x ----------------------------------------------------------------- - --------------------- x10 6 ppm 2 C0 + CL + CSTEP x T REG C0 + CL C1 C0 CL CSTEP TREG is the Crystal Motional Capacitance is the Crystal Shunt Capacitance is the Inherent (parasitic) Load Capacitance is the Tuning Capacitance Resolution 0.01pF is the Tuning Capacitor Register Value from 0 to 511
31.875 - 50
Identify the range(s) that match the desired output frequency and select the associated Output Divider (D) value. The VCO frequency is then calculated as: F VCO = ( F OUT x D x 2 )
Table 3C. FVCO Table
Output Frequency Range (MHz) FOUT 85.0000 - 170.0000 42.5000 - 85.0000 28.3333 - 56.6667 Output Divider (D) 1 2 3 4 5 6 *** 125 126 127 VCO Frequency (MHz) 170 - 340 170 - 340 170 - 340 170 - 340 170 - 340 170 - 340 *** 170 - 340 170 - 340 170 - 340
Determining the Appropriate Register Settings
A typical use for this type of device is generating virtually any frequency between 1MHz to 170MHz from a single crystal frequency value. The steps required to accomplish this are: 1. 2. 3. 4. 5. 6. Determine the crystal frequency. Determine the desired output frequency. Determine the proper prescaler value using the crystal frequency and the associated phase detector frequency. Determine the proper output divider using the desired output frequency to optimize the internal VCO frequency. Determine the appropriate fractional multiplier value using the phase detector frequency and the VCO frequency. Determine the MBIN value by multiplying the MDEC value by 16384.
21.2500 - 42.5000 17.0000 - 34.0000 14.1667 - 28.3333 *** 0.6800 - 1.3600 (NOTE) 0.6746 - 1.3492 (NOTE) 0.6693 - 1.3386 (NOTE)
NOTE: The specified minimum output frequency is 1MHz. While output frequencies less than 1MHz are possible, specified device performance is not guaranteed.
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IDT5V7855 Data Sheet
EEPROM PROGRAMMABLE PLL DIE FOR LVCMOS CRYSTAL OSCILLATOR
The fractional multiplier is determined from the phase detector frequency and the VCO frequency using the following equations. Calculate the fractional multiplier decimal value: F VCO M DEC = ----------------------------------F PHASE - DET Calculate the fractional multiplier register binary value: MBIN = MDEC x 16384 Example 1: The crystal frequency is 27MHz and the desired output frequency is 166.66667MHz. 1. With a crystal frequency of 27MHz, the appropriate prescaler value is 1 and the associated phase detector frequency would be: 27MHz / 1 = 27MHz. For an output frequency of 166.6667MHz, the output divider which can be used with a VCO frequency in the proper 170MHz to 340MHz range is 1, and the resulting VCO frequency is: 166.6667MHz x 1 x 2 = 333.33MHz. The fractional multiplier is calculated as the VCO frequency divided by the phase detector frequency or 333.33MHz / 27MHz = 12.345679. The MBIN is found by 12.345679 x 16384 = 202271.6 and is rounded to 202272. Due to the rounding, the actual MDEC value will be 12.3457 and the actual output frequency will be:
3.
The fractional multiplier is calculated as the VCO frequency divided by the phase detector frequency. So, for the possible combinations identified, the resulting fractional multiplier could be one of nine possibilities.
Table 3D. Fractional Multiplier Table
P=1 FPHASE_DET (48MHz) D=4 MDEC = FVCO = 200MHz D=5 MDEC = FVCO = 250MHz D=6 MDEC = FVCO = 300MHz 200MHz ---------------------48MHz 4.16666 250MHz ---------------------48MHz 5.20833 300MHz ---------------------48MHz 6.5 P=2 FPHASE_DET (24MHz) 200MHz MDEC= ---------------------24MHz 8.33333 250MHz MDEC= ---------------------24MHz 10.41666 300MHz MDEC = ---------------------24MHz 12.5 P=3 FPHASE_DET (16MHz) 200MHz MDEC = ---------------------16MHz 12.5 250MHz MDEC = ---------------------16MHz 15.625 300MHz MDEC= ---------------------16MHz 18.75
2.
3.
4.
4. 5.
M DEC 12.3457 F OUT = F XTAL x -------------------------- = 27MHz x -------------------P x ( D x 2) 1 x1 x 2 FOUT = 166.66699MHz (NOTE: This is an error of only 1.94ppm.)
With the different MDEC values to choose from, how does one select the `best' value? In general, selecting a fractional value which reduces the ppm error is the first selection criteria. This applies to MDEC values which have the fewest non-zero decimal places or MDEC values which have large integer values. This criteria would eliminate the MDEC = 4.16666, 5.208333, 8.33333, and 10.4166666 options. After the ppm error selection is made and if there are still other options, generally the higher VCO frequency will provide better performance. In this example, the higher VCO frequency corresponds with D = 6 and the associated P and MDEC values of 1 and 6.25, 2 and 12.5, or 3 and 18.75. Lastly, the higher phase detector frequency generally provides better performance. So for this example, the condition of P = 1, MDEC = 6.25, and D = 6 would be the preferred choice. The MBIN is found by: 6.25 x 16384 = 102400. (No rounding is necessary.) Verifying the values M DEC 12.5 F OUT = F XTAL x -------------------------- = 48MHz x -------------------P x ( D x 2) 2 x6 x 2
Example 2: The starting crystal frequency is 48MHz and the desired output frequency is 25MHz. 1. With a starting crystal frequency of 48MHz, the appropriate prescaler value can be either 1, 2 or 3 and the associated phase detector frequency would be either: 48MHz / 1 = 484MHz, 48MHz / 2 = 24MHz or, 48MHz / 3 = 16MHz. 2. For an output frequency of 25MHz, the output dividers which can be used with a VCO frequency in the proper 170MHz to 340MHz range are: 4, 5, or 6, and the resulting VCO frequencies is: 200MHz, 250MHz, or 300MHz.
5. 6.
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IDT5V7855 Data Sheet
EEPROM PROGRAMMABLE PLL DIE FOR LVCMOS CRYSTAL OSCILLATOR
Programming Instructions
The IDT5V7855 registers, along with some control functions, are written and the EEPROM burned through a serial write using the CONT and OUT pins. During the programming the CONT pin functions as a Data input while the OUT pin functions as a Clock 9 bits 19 bits 3 bits 3 bits 1 bit 1 bit 1 bit 7 bits input. The data registers are not addressed individually but are all written sequentially with the most significant bit first. All registers must be written when programming the device. The order of registers / control bits and the number of bits per register are:
Tuning Capacitor Register T[8:0] Fractional Multiplier Register M[18:0] Prescaler Register P[2:0] Factory Test Mode Register F[2:0] PLL Bypass Mode (0 = crystal oscillator connected directly to output divider, 1 = PLL used) Power Down Control (0 = CONT acts as an output enable, 1 = CONT acts as power down) Output Enable Type (0 = synchronous output enable, 1 = asynchronous output enable) Output Divider Register D[6:0]
Table 3E. Register Table
Register Name # of Bits Symbol Tuning Capacitor 9-bit T[8:0] Fractional Multiplier 19-bit M[18:0] Prescaler (P) 3-bit P[2:0] Factory Test Mode 3-bit F[2:0] PLL Mode 1-bit Power Down Control 1-bit Output Enable Control 1-bit Output Divider 7-bit D[6:0]
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IDT5V7855 Data Sheet
EEPROM PROGRAMMABLE PLL DIE FOR LVCMOS CRYSTAL OSCILLATOR
The procedure to program the registers and control bits without writing to the EEPROM is as follows: 1. 2. 3. 4. 5. 6. 7. Set CONT and OUT to 0.0 volts with no power applied. Apply power, wait for 1ms. Apply four clock pulses on OUT to enter serial programming mode (see timing diagram below). Enter serial data (bit order as described above) via the CONT pin, with a positive pulse on OUT pin for each data bit. NOTE: CONT must only change while OUT is LOW to write the data properly. To activate the registers and exit serial programming mode, while OUT is held LOW, set CONT HIGH. After 1s with CONT still HIGH, set OUT HIGH. After 1s with OUT still HIGH, set CONT LOW. Remove the programming voltage from OUT pin. Enable the output by setting CONT HIGH.
Figure 2. Timing Diagram 3F. Timing/Voltage Requirements Table
Symbol ts td VDD Parameter Enter Serial Data Mode Data & Clock Timing Supply Voltage Minimum 1 1 2.2 3.6 Maximum Units ms s V
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(c)2010 Integrated Device Technology, Inc.
IDT5V7855 Data Sheet
EEPROM PROGRAMMABLE PLL DIE FOR LVCMOS CRYSTAL OSCILLATOR
The procedure to program the registers and control bits and write the data to the EEPROM is as follows: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. Set CONT and OUT to 0.0 volts with no power applied. Apply power, wait for 1ms. Apply four clock pulses to OUT to enter serial programming mode (see timing diagram below). Wait 1ms. Apply EEPROM programming pulse (12V) on CONT to erase EEPROM. [WARNING: Do not apply High Voltage Programming pulse prior to entering serial mode.] Wait 1ms. Enter serial data (bit order as described above) via the CONT pin, with a positive pulse on OUT pin for each data bit. NOTE: CONT must only change while OUT is LOW to write the data properly. Complete the serial write with a Stop Bit set to 0. Wait 1ms While OUT is held LOW, apply EEPROM programming pulse (12V) to CONT to store the data in EEPROM. Remove power from the device.
Figure 3. Timing Diagram
3G. Timing/Voltage Requirements Table
Symbol ts td tp tR / tF VDD VPP Parameter Enter Serial Data Mode Data & Clock Timing Programming EEPROM Timing Rise/Fall Time of VPP Supply Voltage; NOTE Programming EEPROM Voltage 10% - 90% 2.2 11.5 Test Conditions Minimum 1 1 100 110 5 3.6 12.5 Maximum Units ms s ms ms V V
NOTE: The supply voltage on VDD must be able to sink at least 2mA when VPP is applied to CONT to ensure transient currents are safely absorbed. Alternatively, a 1k resistor may be connected between VDD and GND during programming.
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IDT5V7855 Data Sheet
EEPROM PROGRAMMABLE PLL DIE FOR LVCMOS CRYSTAL OSCILLATOR
Absolute Maximum Ratings
NOTE: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings are stress specifications only. Functional operation of product at these conditions or any conditions beyond those listed in the DC Characteristics or AC Characteristics is not implied. Exposure to absolute maximum rating conditions for extended periods may affect product reliability. Item Supply Voltage, VDD Inputs/Outputs, VI / VO; NOTE Storage Temperature, TSTG Rating 4.6V -0.5V to VDD + 0.5V -65C to 150C
NOTE: 12.5V can be applied to the CONT pin during serial programming mode only after applying four clock pulses to the OUT pin.
DC Electrical Characteristics
Table 4A. Power Supply DC Characteristics, VDD = 2.3V to 3.6V, TA = -40C to 85C
Symbol VDD Parameter Power Supply Voltage No Load IDD Power Supply Current No Load PWRDN fOUT = 50MHz, Non-PLL mode fOUT = 170MHz, PLL mode Power-Down Mode Test Conditions Minimum 2.3 Typical 3.0 Maximum 3.6 6 15 40 Units V mA mA A
Table 4B. LVCMOS/LVTTL DC Characteristics, VDD = 2.7V to 3.6V, TA = -40C to 85C
Symbol VIH VIL IIN Parameter Input High Voltage Input Low Voltage CONT Input Current OUT VOH Output High Voltage Output Low Voltage IOH = -100A IOH = -4mA IOL = 100A IOL = 4mA Test Conditions VOUT = VOH (min.) VOUT = VOH (max.) VIN = max.; VIN = 0V or VIN = VDD VDD = min. VI = VIH or VIL VDD - 0.2 2.2 0.2 VDD = min. VI = VIH or VIL V 0.4 Minimum 2 -0.3 Typical Maximum VDD + 0.3 0.8 5 A 15 V Units V V
VOL
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IDT5V7855 Data Sheet
EEPROM PROGRAMMABLE PLL DIE FOR LVCMOS CRYSTAL OSCILLATOR
Table 4C. LVCMOS/LVTTL DC Characteristics, VDD = 2.3V to 2.7V, TA = -40C to 85C
Symbol VIH VIL IIN Parameter Input High Voltage Input Low Voltage Input Curren t Output High Voltag e Output Low Voltag e CONT OUT IOH = -100A IOH = -1mA IOH = -2mA IOH = -100A IOH = -1mA IOH = -2mA Test Conditions VOUT = VOH (min.) VOUT = VOH (max.) VIN = max.; VIN = 0V or VIN = VDD 2.1 VDD = min.; VI = VIH or VIL 2 1.7 0.2 VDD = min.; VI = VIH or VIL 0.4 0.7 V V Minimum 1.7 -0.3 Typical Maximum VDD + 0.3 0.7 5 A 15 Units V V
VOH
VOL
AC Electrical Characteristics
Table 6. AC Characteristics, VDD = 2.3V to 3.6V, TA = -40C to 85C
Symbol fVCO fOUT Parameter VCO Frequency Output Frequency PLL Mode Non-PLL Mode PLL Mode Non-PLL Mode PLL Mode Non-PLL Mode PLL Mode Non-PLL Mode Measured over 50,000 cycles; fOUT > 40MHz Measured over 50,000 cycles; fOUT > 16MHz Measured over 50,000 cycles; fOUT > 40MHz Measured over 50,000 cycles; fOUT > 16MHz Measured over 50,000 cycles; fOUT > 40MHz Measured over 50,000 cycles; fOUT > 16MHz fOUT > 40MHz, 20% to 80% PLL Bypass 100 48 45 Test Conditions Minimum 170 1 1 Typical Maximum 340 170 50 30 9 230 90 130 75 700 52 55 10 Units MHz MHz MHz ps ps ps ps ps ps ps % % ms
tjit(per)
Period Jitter, RMS; NOTE 1, 2
tp-p
Peak-to-Peak Jitter; NOTE 1, 2
tjit(cc)
Cycle-to-Cycle Jitter; NOTE 1, 2
tR / t F odc tOSC
Output Rise/Fall Time; NOTE 2 Output Duty Cycle; NOTE 2 Oscillation Startup Time
NOTE 1: Measured on Wavecrest SIA3000. NOTE 2: Output terminated with 50 to VDD/2.
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IDT5V7855 Data Sheet
EEPROM PROGRAMMABLE PLL DIE FOR LVCMOS CRYSTAL OSCILLATOR
Parameter Measurement Information
1.65V0.15V 1.25V0.15V
VDD
SCOPE
VDD
SCOPE
LVCMOS
Qx
LVCMOS
GND
Qx
GND
1.65V0.15V
-1.25V0.15V
3.3V Output Load AC Test Circuit
2.5V Output Load AC Test Circuit
VOH VREF
OUT
tcycle n
tcycle n+1
tjit(cc) = |tcycle n - tcycle n+1| 1000 Cycles
1 contains 68.26% of all measurements 2 contains 95.4% of all measurements 3 contains 99.73% of all measurements 4 contains 99.99366% of all measurements 6 contains (100-1.973x10-7)% of all measurements
VOL
Cycle-to-Cycle Jitter
V
OUT
t PW
t
PERIOD
odc =
t PW t PERIOD
Output Duty Cycle/Pulse Width/Period
IDT5V7855-DPK REVISION A MARCH 11, 2010
DD
Reference Point
(Trigger Edge)
Histogram
Mean Period
(First edge after trigger)
Period Jitter
2
80% 20% tR x 100%
80% 20% tF
OUT
Output Rise/Fall Time
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(c)2010 Integrated Device Technology, Inc.
IDT5V7855 Data Sheet
EEPROM PROGRAMMABLE PLL DIE FOR LVCMOS CRYSTAL OSCILLATOR
Pad Information
Table 7. Bond Pad Coordinates
Pad Name Pad Size (m) X(m) 1 2 3 4 5 6 7 8 VDD VDD xd xg CONT VSS VSS OUT 75 x 75 75 x 75 75 x 75 75 x 75 75 x 75 75 x 75 75 x 75 75 x 75 -266 -266 -266 -266 -266 161 266 191 Coordinates Y(m) 266 161 56 -161 -266 -266 -266 219
NOTE: Pad locations specify the center of the pad relative to the center of the die. NOTE The substrate of the die should be connected to VSS. NOTE: Not all of the VSS pads need to be bonded, but all of the VDD pads need to be bonded.
Ordering Information
Table 8. Ordering Information
Part/Order Number 5V7855-DPK 5V7855SWFR Package Die Sawn Wafer Shipping Packaging Waffle Film Frame Temperature -40C to 85C -40C to 85C
While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology (IDT) assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial and industrial applications. Any other applications, such as those requiring high reliability or other extraordinary environmental requirements are not recommended without additional processing by IDT. IDT reserves the right to change any circuitry or specifications without notice. IDT does not authorize or warrant any IDT product for use in life support devices or critical medical instruments.
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(c)2010 Integrated Device Technology, Inc.
IDT5V7855 Data Sheet
EEPROM PROGRAMMABLE PLL DIE FOR LVCMOS CRYSTAL OSCILLATOR
Revision History Sheet
Rev A A T8 Table Page 7 12 Description of Change Deleted procedure 5. Complete the serial write with a Stop Bit set to 0. Updated Figure 2. Timing Diagram. Ordering Information Table - added Sawn Wafer package. Date 2/20/08 3/11/10
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(c)2010 Integrated Device Technology, Inc.
IDT5V7855 Data Sheet
EEPROM PROGRAMMABLE PLL DIE FOR LVCMOS CRYSTAL OSCILLATOR
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DISCLAIMER Integrated Device Technology, Inc. (IDT) and its subsidiaries reserve the right to modify the products and/or specifications described herein at any time and at IDT's sole discretion. All information in this document, including descriptions of product features and performance, is subject to change without notice. Performance specifications and the operating parameters of the described products are determined in the independent state and are not guaranteed to perform the same way when installed in customer products. The information contained herein is provided without representation or warranty of any kind, whether express or implied, including, but not limited to, the suitability of IDT's products for any particular purpose, an implied warranty of merchantability, or non-infringement of the intellectual property rights of others. This document is presented only as a guide and does not convey any license under intellectual property rights of IDT or any third parties. IDT's products are not intended for use in life support systems or similar devices where the failure or malfunction of an IDT product can be reasonably expected to significantly affect the health or safety of users. Anyone using an IDT product in such a manner does so at their own risk, absent an express, written agreement by IDT. Integrated Device Technology, IDT and the IDT logo are registered trademarks of IDT. Other trademarks and service marks used herein, including protected names, logos and designs, are the property of IDT or their respective third party owners. Copyright 2010. All rights reserved.

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