Programmable LVCMOS/LVTTL Clock Generator IDT5V925BI DATA SHEET General Description Features The IDT5V925BI is a high-performance, low skew, low jitter phase-locked loop (PLL) clock driver. It provides precise phase and frequency alignment of its clock outputs to an externally applied clock input or internal crystal oscillator. The IDT5V925BI has been specially designed to interface with Gigabit Ethernet and Fast Ethernet applications by providing a 125MHz clock from 25MHz input. It can also be programmed to provide output frequencies ranging from 3.125MHz to 160MHz with input frequencies ranging from 3.125MHz to 80MHz. • • • • • • • 3V to 3.6V operating voltage The IDT5V925BI includes an internal RC filter that provides excellent jitter characteristics and eliminates the need for external components. When using the optional crystal input, the chip accepts a 10-30MHz fundamental mode crystal with a maximum equivalent series resistance of 50Ω. The on-chip crystal oscillator includes the feedback resistor and crystal capacitors (nominal load capacitance is 18pF). • • • • • 5V tolerant inputs Low output skew/jitter External PLL feedback, internal loop filter 3.125MHz to 160MHz output frequency range Four programmable frequency LVCMOS/LVTTL outputs Input from fundamental crystal oscillator or external source Balanced drive outputs ±12mA PLL disable mode for low frequency testing Select inputs (S[1:0]) for divide selection (multiply ratio of 2, 3, 4, 5, 6, 7 and 8) -40°C to 85°C ambient operating temperature Available in Lead-free (RoHS 6) package Pin Assignment Applications • • • • • S1 1 16 VDD S0 2 15 GND GNDQ 3 14 Q2 VDDQ 4 13 Q1 SAN X1 5 12 Q0 Instrumentation X2 6 11 Q/N CLKIN 7 10 GND FB 8 9 Ethernet/fast ethernet Router Network switches OE IDT5V925BI 16 LEAD QSOP 0.194” x 0.236” x 0.058” package body Q Package Top View Block Diagram S0 S1 SELECT MODE FB PHASE DETECTOR CLKIN LOOP FILTER VCO 0 1 VCO DIVIDE 1/N Q/N Q0 X2 XTAL OSC Q1 X1 OPTIONAL CRYSTAL Q2 OE IDT5V925BQGI REVISION B JANUARY 21, 2011 1 ©2011 Integrated Device Technology, Inc. IDT5V925BI Data Sheet PROGRAMMABLE LVCMOS/LVTTL CLOCK GENERATOR Table 1. Pin Descriptions Number Name 1, 2 S1, S0 Input 3 GNDQ Power Ground supply for PLL. 4 VDDQ Power Power supply for PLL. 5 (1) Input Crystal oscillator input. Connected to GND if oscillator not required. (1) Output 6 X1 X2 Type Pullup/ Pulldown Description Three level divider/mode select pins. Float to MID. Crystal oscillator output. Leave unconnected for clock input. 7 CLKIN Input Clock input. 8 FB Input PLL feedback input which should be connected to Q/N output pin only. PLL locks onto positive edge of FB signal. 9 OE Input High-Impedance output enable. When asserted HIGH, clock outputs are high impedance. 10, 15 GND Power Ground supply for output buffers. 11 Q/N Output Programmable divide-by-N clock output. 12, 13, 14 Q0, Q1, Q2 Output Output at N*CLKIN frequency. 16 VDD Power Power supply for output buffers. NOTE: Pullup and Pulldown refer to internal input resistors. See Table 2, Pin Characteristics, for typical values. NOTE 1: For best accuracy, use parallel resonant crystal specified for a load capacitance of 18pF. Table 2. Pin Characteristics Symbol Parameter CIN Input Capacitance CPD Power Dissipation Capacitance (per output) RPULLUP Test Conditions Minimum Typical Maximum Units CLKIN, FB, OE 4 pF VDD = 3.6V 15 pF Input Pullup Resistor 47 kΩ RPULLDOWN Input Pulldown Resistor 47 kΩ ROUT Output Impedance 16 Ω IDT5V925BQGI REVISION B JANUARY 21, 2011 VDD = 3.3V±0.3V 2 ©2011 Integrated Device Technology, Inc. IDT5V925BI Data Sheet PROGRAMMABLE LVCMOS/LVTTL CLOCK GENERATOR Function Tables Table 3A. Function Table Allowable CLKIN Range (MHz) (1, 2) Output Frequency Relationships Output Used for Feedback Minimum Maximum Q/N Q[2:0] Q/N 25/N 160/N CLKIN CLKIN x N NOTE 1: Operation in the specified CLKIN frequency range guarantees that the VCO will operate in the optimal range of 25MHz to 160MHz. Operation with CLKIN outside specified frequency ranges may result in invalid or out-of-lock outputs. NOTE 2: Q[2:0] are not allowed to be used as feedback. Table 3B. Divide Selection Table (1) S1 S0 L L Divide-by-N Value Mode L M 2 PLL Factory Test (2) L H 3 PLL M L 4 PLL M M 5(3) (default) PLL M H 6 PLL H L 7 PLL H M 8 PLL H H 16 TEST(4) NOTE 1: H = HIGH, M = MEDIUM, L = LOW. NOTE 2: Factory Test Mode: operation not specified. NOTE 3: Ethernet mode (use a 25MHz input frequency and Q/N as feedback). NOTE 4: Test mode for low frequency testing. In this mode, CLKIN bypasses the VCO (VCO powered down). Frequency must be > 1MHz due to dynamic circuits in the frequency dividers. Q[2:0] outputs are divided by 2 in test mode. IDT5V925BQGI REVISION B JANUARY 21, 2011 3 ©2011 Integrated Device Technology, Inc. IDT5V925BI Data Sheet PROGRAMMABLE LVCMOS/LVTTL CLOCK GENERATOR 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 Rating Supply Voltage to Ground, VTERM -0.5V to +4.6V DC Input Voltage, VIN -0.5V to +4.6V DC Output Voltage, VOUT -0.5 to VDD +0.5V Maximum Power Dissipation, TA = 85°C 0.55W Storage Temperature, TSTG -65°C to +150°C Package Thermal Impedance, θJA 72.3°C/W Operating Conditions Symbol Description Minimum Typical Maximum Units VDD / VDDQ Power Supply Voltage 3.0 3.3 3.6 V TA Operating Temperature -40 +25 +85 °C DC Electrical Characteristics Table 4A. Power Supply DC Characteristics, VDD = 3.3V ± 0.3V, TA = -40°C to 85°C Symbol Parameter IDDQ Quiescent Supply Current Static Supply Current IDD Dynamic Supply Current Test Conditions Minimum Typical Maximum Units VDD = VDDQ = 3.6V; CLKIN = 2.5MHz; S[1:0] = MM, OE = H, All Outputs Unloaded 2 4 mA VDD = VDDQ = 3.6V; S[1:0] = MM, OE = H, All Outputs Unloaded 83 102 mA VDD = VDDQ = 3.6V, fOUT = 70MHz; S[1:0] = LM, OE = GND, All Outputs Loaded with 50Ω to GND 80 160 mA NOTE: H = HIGH, M = MEDIUM, L = LOW IDT5V925BQGI REVISION B JANUARY 21, 2011 4 ©2011 Integrated Device Technology, Inc. IDT5V925BI Data Sheet PROGRAMMABLE LVCMOS/LVTTL CLOCK GENERATOR Table 4B. LVCMOS/LVTTL DC Characteristics, VDD = 3.3V ± 0.3V, TA = -40°C to 85°C Symbol Parameter Test Conditions Minimum VIL Input Low Voltage VIH Input High Voltage VIHH Input High Voltage S[1:0] VIMM Input Mid Voltage VILL IIN (1) (1) Typical I3 Units 0.8 V 2 V 3-Level Input Only VDD - 0.6 V S[1:0] 3-Level Input Only VDD/2 - 0.3 Input Low Voltage S[1:0] 3-Level Input Only Input Leakage Current CLKIN, FB VIN = VDD or GND, VDD = Max. -5 VIN = VDD, HIGH Level (1) Maximum 3-Level Input DC Current S[1:0] VIN = VDD/2, MID Level -50 VIN = GND, LOW Level -200 VIN = VDD -5 IIH Input High Current VOL Output Low Voltage IOL = 12mA VOH Output High Voltage IOH = -12mA 2.4 VDD/2 + 0.3 V 0.6 V +5 µA 200 µA +50 µA µA 0.07 ±5 µA 0.15 0.55 V 2.8 V NOTE: Conditions apply unless otherwise specified. NOTE 1: These inputs are normally wired to VDD, GND, or unconnected. If the inputs are switched in real time, the function and timing of the outputs may glitch, and the PLL may require an additional lock time before all the datasheet limits are achieved. Table 5. Crystal Characteristics Parameter Test Conditions Minimum Maximum Units 30 MHz Equivalent Series Resistance (ESR) 50 Ω Shunt Capacitance 7 pF Mode of Oscillation Typical Fundamental Frequency 10 NOTE: Characterized using an 18pF parallel resonant crystal. IDT5V925BQGI REVISION B JANUARY 21, 2011 5 ©2011 Integrated Device Technology, Inc. IDT5V925BI Data Sheet PROGRAMMABLE LVCMOS/LVTTL CLOCK GENERATOR AC Electrical Characteristics Table 6A. AC Characteristics, VDD = 3.3V ± 0.3V, TA = -40°C to 85°C Symbol Parameter Test Conditions tR / tF Rise and Fall Time; NOTE 1 odc Output Duty Cycle; NOTE 1, 2 tPD Propagation Delay; NOTE 1, 2 tsk(o) Output-to-Output Skew; NOTE 1, 3, 4 tjit(cc) Cycle-to-Cycle Jitter; NOTE 1, 3 fOUT Output Frequency Minimum Typical Maximum Units 0.7 1.8 ns 44 56 % 50 450 ps Q[2:0] 110 ps Q/N - Q[2:0] 450 ps 300 ps 160 MHz 0.8V to 2V CLKIN to FB 25 NOTE: Electrical parameters are guaranteed over the specified ambient operating temperature range, which is established when the device is mounted in a test socket with maintained transverse airflow greater than 500 lfpm. The device will meet specifications after thermal equilibrium has been reached under these conditions. NOTE: JEDEC Standard 65. NOTE 1: Guaranteed by design but not production tested. NOTE 2: Measured from VDD/2 of the input crossing point to the output at VDD/2. NOTE 3: This parameter is defined in accordance with JEDEC Standard 65. NOTE 4: Defined as skew between outputs at the same supply voltage and with equal load conditions. Measured at VDD/2. Table 6B. Input Timing Requirements, TA = -40°C to 85°C Symbol Parameter fosc Crystal Oscillator Frequency fIN Input Frequency IDT5V925BQGI REVISION B JANUARY 21, 2011 Test Conditions 6 Minimum Maximum Units 10 30 MHz 25/N 160/N MHz ©2011 Integrated Device Technology, Inc. IDT5V925BI Data Sheet PROGRAMMABLE LVCMOS/LVTTL CLOCK GENERATOR Parameter Measurement Information 1.65V ± 0.15V SCOPE VDD, VDDQ VDD 2 Qx Qx LVCMOS VDD 2 Qy GND tsk(b) -1.65V ± 0.15V LVCMOS Output Load AC Test Circuit Output Skew 3V 2V V Q/N, Q[2:0] V V DD DD 2 DD 2 VT H 2 /2 C /2 = VVCDD 0.8 ➤ ➤ tcycle n ➤ tcycle n+1 ➤ 0V tjit(cc) = |tcycle n – tcycle n+1| 1000 Cycles 1ns 1ns Cycle-to-Cycle Jitter C VVCDD 2V VT H C /2 = VVCDD /2 0.8 VDD 2 CLKIN 0V tR VDD 2 Q/N, Q[2:0] t tF Input and Output Test Waveforms PD Propagation Delay IDT5V925BQGI REVISION B JANUARY 21, 2011 7 ©2011 Integrated Device Technology, Inc. IDT5V925BI Data Sheet PROGRAMMABLE LVCMOS/LVTTL CLOCK GENERATOR Parameter Measurement Information, continued V V DD DD 2 Q[2:0] 2 t PW t odc = PERIOD t PW x 100% t PERIOD Output Duty Cycle/Pulse Width/Period Applications Information Recommendations for Unused Input and Output Pins Inputs: Outputs: CLKIN Input LVCMOS Outputs For applications not requiring the use of a clock input, but using the crystal interface, the CLKIN input has to be connected to X2 (output of the crystal oscillator). See Figure 3. All unused LVCMOS output can be left floating. There should be no trace attached. Crystal Inputs For applications not requiring the use of the crystal oscillator, X2 should be left floating and X1 and should be tied to ground. See Figure 2. LVCMOS Control Pins All control pins have internal pullups or pulldowns; additional resistance is not required but can be added for additional protection. A 1kΩ resistor can be used. IDT5V925BQGI REVISION B JANUARY 21, 2011 8 ©2011 Integrated Device Technology, Inc. IDT5V925BI Data Sheet PROGRAMMABLE LVCMOS/LVTTL CLOCK GENERATOR How to Use the IDT5V925BI The IDT5V925BI is a general-purpose phase-locked loop (PLL) that can be used as a zero delay buffer or a clock multiplier. It generates three outputs at the VCO frequency and one output at the VCO frequency divided by n, where n is determined by the Mode/ Frequency Select input pins S0 and S1. The PLL will adjust the VCO frequency (within the limits of the Function Table) to ensure that the input frequency equals the Q/N frequency. By connecting one of the 49FCT3505 outputs to the FB input of the IDT5V925BI, the propagation delay from CLKIN to the output of the 49FCT3505 will be nearly zero. To ensure PLL stability, only one 49FCT3505 should be included between Q/N and FB. The second way to drive the input of the IDT5V925BI is via an external crystal. When connecting an external crystal to pins 5 and 6, the X2 pin must be shorted to the CLKIN (pin 7) as shown in Figure 3. To reduce the parasitic between the external crystal and the IDT5V925BI, it is recommended to connect the crystal as close as possible to the X1 and X2 pins. The IDT5V925BI can accept two types of input signals. The first is a reference clock generated by another device on the board which needs to be reproduced with a minimal delay between the incoming clock and output. The second is an external crystal. When used in the first mode, the crystal input (X1) should be tied to ground and the crystal output (X2) should be left unconnected. FB By connecting Q/N to FB (see Figure 1), the IDT5V925BI not only becomes a zero delay buffer, but also a clock multiplier. With proper selection of S0 and S1, the Q0–Q2 outputs will generate two, three, or up to eight times the input clock frequency. Make sure that the input and output frequency specifications are not violated (refer to Function Table). There are some applications where higher fan-out is required. These kinds of applications could be addressed by using the IDT5V925BI in conjunction with a clock buffer such as the 49FCT3805. Figure 2 shows how higher fan-out with different clock rates can be generated. CLKIN 5V925 Q /N Q0 X2 XTAL Q1 OSC Q2 X1 S0 S1 Figure 3 One of the questions often asked is what is the accuracy of our clock generators? In applications where clock synthesizers are used, the terms frequency accuracy and frequency error are used interchangeably. Here, frequency accuracy (or error) is based on two factors. One is the input frequency and the other is the multiplication factor. Clock multipliers (or synthesizers) are governed by the equation: FB Q /N CLKIN Q0 5V925 X2 Q1 X1 Q2 M FOUT = ----- × FIN N S0 S1 Where “M” is the feedback divide and “N” is the reference divide. If the ratio of M/N is not an integer, then the output frequency will not be an exact multiple of the input. On the other hand, if the ratio is a whole number, the output clock would be an exact multiple of the input. In the case of IDT5V925BI, since the reference divide (“N”) is “1”, the equation is a strong function of the feedback divide (“M”). In addition, since the feedback is an integer, the output frequency error (or accuracy) is merely a function of how accurate the input is. For instance, IDT5V925BI could accept two forms of input, one from a crystal oscillator (see Figure 1) and the other from a crystal (see Figure 3). By using a 20MHz clock with a multiplication factor of 5 (with an accuracy of ±30 parts per million), one can easily have three copies of 100MHz of clock with ±30ppm of accuracy. Frequency accuracy is defined by the following equation: Figure 1 FB INA Q/N 5 C O PIES OF Q/N CLKIN 5V925 49FC T3805 X2 X1 Q [2:0] INB 5 C O PIES OF Q Accuracy = Measured Frequency – Nominal Frequency x 106 Nominary Frequency S0 S1 Where measured frequency is the average frequency over certain number of cycles (typically 10,000) and the nominal frequency is the desired frequency. Figure 2 IDT5V925BQGI REVISION B JANUARY 21, 2011 9 ©2011 Integrated Device Technology, Inc. IDT5V925BI Data Sheet PROGRAMMABLE LVCMOS/LVTTL CLOCK GENERATOR Schematic Examples Figures 4A and 4B show an examples of IDT5V925BI application schematic. In Figure 4A example, the device is operated at VDD = VDDQ = 3.3V. The 18pF parallel resonant 25MHz crystal is used. The load capacitance, C1 = 27pF and C2 = 27pF are recommended for frequency accuracy. Depending on the parasitics of the printed circuit board layout, these values might require a slight adjustment to optimize the frequency accuracy. Crystals with other load capacitance specifications can be used. This will required adjusting C1 and C2. In Figure 4B example, the LVCMOS clock reference input is used. As with any high speed analog circuitry, the power supply pins are vulnerable to noise. To achieve optimum jitter performance, power supply isolation is required. The IDT5V925BI provides separate power supplies to isolate from coupling into the internal PLL. BLM18BB221SN1 1 VDD 3.3V BLM18BB221SN2 1 C4 0.1uF C7 2 VDDQ Ferrite Bead C5 3.3V 2 Ferrite Bead C8 0.1uF C3 0.1uF 10uF C6 10uF 0.1uF Q2 R1 33 Zo = 50 Ohm U1 S1 S2 XTAL_IN XTAL_OUT 25MHz S1 S0 GNDQ VDDQ X1 X2 CLKIN FB VDD GND Q2 Q1 Q0 Q/N GND /OE 16 15 14 13 12 11 10 9 LVCMOS VDD=3.3V VDDQ=3.3V Q1 Q0 R2 33 /OE VDDQ X1 F p 8 1 C2 27pF 1 2 3 4 5 6 7 8 Q/N C1 27pF Zo = 50 Ohm R3 100 R4 100 LVCMOS Please short the CLKIN pin and X2 pin for the crystal input option. Logic Control Input Examples Set Logic Input to '1' VDD RU1 1K Set Logic Input to '0' VDD RU2 Not Install To Logic Input pins RD1 Not Install Optional Termination Unused output can be left floating. There should no trace attached to unused output. Device characterized with all outputs terminated. To Logic Input pins RD2 1K Figure 4A. IDT5V925BI Application Schematic with Crystal Input Reference IDT5V925BQGI REVISION B JANUARY 21, 2011 10 ©2011 Integrated Device Technology, Inc. IDT5V925BI Data Sheet PROGRAMMABLE LVCMOS/LVTTL CLOCK GENERATOR Schematic Examples, continued 3.3V BLM18BB221SN1 VDD 3.3V BLM18BB221SN2 1 2 2 Ferrite Bead C8 0.1uF VDDQ Ferrite Bead C5 C4 0.1uF 1 C7 C3 0.1uF 10uF C6 R1 33 10uF 0.1uF Zo = 50 Ohm Q2 U1 S1 S2 1 2 3 4 5 6 7 8 S1 S0 GNDQ VDDQ X1 X2 CLKIN FB VDD GND Q2 Q1 Q0 Q/N GND /OE VDD=3.3V 16 15 14 13 12 11 10 9 LVCMOS VDDQ=3.3V Q1 Q0 R2 33 /OE VDDQ R3 100 Zo = 50 Ohm Q/N R4 100 VDD LVCMOS Q1 Ro ~ 7 Ohm R5 Zo = 50 Ohm Driv er_LVCMOS Optional Termination Logic Control Input Examples 43 Set Logic Input to '1' VDD Set Logic Input to '0' VDD RU1 1K RU2 Not Install To Logic Input pins Unused output can be left floating. There should no trace attached to unused output. Device characterized with all outputs terminated. To Logic Input pins RD1 Not Install RD2 1K Figure 4B. IDT5V925BI Application Schematic with LVCMOS Reference Clock Input In order to achieve the best possible filtering, it is recommended that the placement of the filter components be on the device side of the PCB as close to the power pins as possible. If space is limited, the 0.1uF capacitor in each power pin filter should be placed on the device side of the PCB and the other components can be placed on the opposite side. If a specific frequency noise component is known, such as switching power supply frequencies, it is recommended that component values be adjusted and if required, additional filtering be added. Additionally, good general design practices for power plane voltage stability suggests adding bulk capacitances in the local area of all devices. The schematic example focuses on functional connections and is not configuration specific. Refer to the pin description and functional tables in the datasheet to ensure the logic control inputs are properly set. Power supply filter recommendations are a general guideline to be used for reducing external noise from coupling into the devices. The filter performance is designed for wide range of noise frequencies. This low-pass filter starts to attenuate noise at approximately 10kHz. IDT5V925BQGI REVISION B JANUARY 21, 2011 11 ©2011 Integrated Device Technology, Inc. IDT5V925BI Data Sheet PROGRAMMABLE LVCMOS/LVTTL CLOCK GENERATOR Power Considerations This section provides information on power dissipation and junction temperature for the IDT5V925BI. Equations and example calculations are also provided. 1. Power Dissipation. The total power dissipation for the IDT5V925BI is the sum of the core power plus the power dissipation in the load(s). The following is the power dissipation for VDD = 3.3V + 0.3V = 3.6V, which gives worst case results. The maximum current at 85°C is as follows: IDD_MAX(Static) = 102mA IDDQ_MAX = 4mA CL = 5pF N = number of outputs CPD = 15pF Core Output Power Dissipation • Power (core)MAX = VDD_MAX * (IDD _MAX(Static) + IDDQ_MAX) = 3.6V *(102mA + 4mA) = 382mW LVCMOS Output Power Dissipation • Output Impedance ROUT Power Dissipation due to Loading 50Ω to VDD/2 Output Current IOUT = VDD_MAX / [2 * (50Ω + ROUT)] = 3.6V / [2 * (50Ω + 16Ω)] = 27.3mA • Power Dissipation on the ROUT per LVCMOS output Power (ROUT) = ROUT * (IOUT)2 = 16Ω * (27.3mA)2 = 11.9mW per output • Total Power Dissipation on the ROUT Total Power (ROUT) = 11.9mW * 3 = 35.7mW Dynamic Power Dissipation • Dynamic Power Dissipation at 160MHz Total Power (160MHz) = [(CPD + CL) * N) * Frequency * (VDD)2] = [(15pF + 5pF) * 3) * 160MHz * (3.6V)2] = 124.4mW Total Power Dissipation • Total Power = Power (core) + Total Power (ROUT) + Total Power (160MHz) = 382mW + 35.7mW + 124.4mW = 542mW IDT5V925BQGI REVISION B JANUARY 21, 2011 12 ©2011 Integrated Device Technology, Inc. IDT5V925BI Data Sheet PROGRAMMABLE LVCMOS/LVTTL CLOCK GENERATOR 2. Junction Temperature. Junction temperature, Tj, is the temperature at the junction of the bond wire and bond pad, and directly affects the reliability of the device. The maximum recommended junction temperature is 125°C. Limiting the internal transistor junction temperature, Tj, to 125°C ensures that the bond wire and bond pad temperature remains below 125°C. The equation for Tj is as follows: Tj = θJA * Pd_total + TA Tj = Junction Temperature θJA = Junction-to-Ambient Thermal Resistance Pd_total = Total Device Power Dissipation (example calculation is in section 1 above) TA = Ambient Temperature In order to calculate junction temperature, the appropriate junction-to-ambient thermal resistance θJA must be used. Assuming no air flow and a multi-layer board, the appropriate value is 72.3°C/W per Table 7 below. Therefore, Tj for an ambient temperature of 85°C with all outputs switching is: 85°C + 0.542W * 72.3°C/W = 124.2°C. This is below the limit of 125°C. This calculation is only an example. Tj will obviously vary depending on the number of loaded outputs, supply voltage, air flow and the type of board (multi-layer). Table 7. Thermal Resistance θJA for 16-lead QSOP, Forced Convection θJA by Velocity Meters per Second Multi-Layer PCB, JEDEC Standard Test Boards IDT5V925BQGI REVISION B JANUARY 21, 2011 0 1 2.5 72.3°C/W 64.4°C/W 60.0°C/W 13 ©2011 Integrated Device Technology, Inc. IDT5V925BI Data Sheet PROGRAMMABLE LVCMOS/LVTTL CLOCK GENERATOR Reliability Information Table 8. θJA vs. Air Flow Table for a Q Suffix, 16-lead QSOP θJA by Velocity Meters per Second Multi-Layer PCB, JEDEC Standard Test Boards IDT5V925BQGI REVISION B JANUARY 21, 2011 0 1 2.5 72.3°C/W 64.4°C/W 60.0°C/W 14 ©2011 Integrated Device Technology, Inc. IDT5V925BI Data Sheet PROGRAMMABLE LVCMOS/LVTTL CLOCK GENERATOR Package Outline and Package Dimensions Package Outline - Q Suffix for 16 Lead QSOP Table 9. Package Dimensions Symbol N A A1 A2 D E E1 P P1 P2 e x JEDEC Variation: AB All Dimensions in Inches Minimum Nominal 16 0.061 0.064 0.004 0.006 0.055 0.058 0.189 0.194 0.230 0.236 0.150 0.155 0.274 0.142 0.175 Basic 0.025 Basic 0.010 Maximum .068 0.010 0.061 0.196 0.244 0.157 0.282 0.150 0.018 Ref. Document: IDT PC/PCG Package Outline, Dwg# PSC-4040 IDT5V925BQGI REVISION B JANUARY 21, 2011 15 ©2011 Integrated Device Technology, Inc. IDT5V925BI Data Sheet PROGRAMMABLE LVCMOS/LVTTL CLOCK GENERATOR Ordering Information Table 10. Ordering Information Part/Order Number 5V925BQI 5V925BQI8 5V925BQGI 5V925BQGI8 Marking IDT5V925BQI IDT5V925BQI IDT5V925BQGI IDT5V925BQGI Package 16 Lead QSOP 16 Lead QSOP “Lead-Free” 16 Lead QSOP “Lead-Free” 16 Lead QSOP Shipping Packaging Tube 3000 Tape & Reel Tube 3000 Tape & Reel Temperature -40°C to 85°C -40°C to 85°C -40°C to 85°C -40°C to 85°C NOTE: Parts that are ordered with an "G" suffix to the part number are the Pb-Free configuration and are RoHS compliant. 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. IDT5V925BQGI REVISION B JANUARY 21, 2011 16 ©2011 Integrated Device Technology, Inc. IDT5V925BI Data Sheet PROGRAMMABLE LVCMOS/LVTTL CLOCK GENERATOR Revision History Sheet Rev B Table Page 8 10 Description of Change Date Applications for Unused I/O Pins application note - corrected Input descriptions. Deleted Overdriving the XTAL Interface application note. IDT5V925BQGI REVISION B JANUARY 21, 2011 17 1/21/11 ©2011 Integrated Device Technology, Inc. IDT5V925BI Data Sheet PROGRAMMABLE LVCMOS/LVTTL CLOCK GENERATOR We’ve Got Your Timing Solution 6024 Silver Creek Valley Road San Jose, California 95138 Sales 800-345-7015 (inside USA) +408-284-8200 (outside USA) Fax: 408-284-2775 www.IDT.com/go/contactIDT Technical Support email@example.com +480-763-2056 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. 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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 2011. All rights reserved.