NB3V63143G 1.8 V Programmable OmniClock Generator with Single Ended (LVCMOS) and Differential (LVDS/HCSL) Outputs with Individual Output Enable and Individual VDDO The NB3V63143G, which is a member of the OmniClock family, is a one−time programmable (OTP), low power PLL−based clock generator that supports any output frequency from 8 kHz to 200 MHz. The device accepts fundamental mode parallel resonant crystal or a single ended (LVCMOS) reference clock as input. It generates either three single ended (LVCMOS) outputs, or one single ended output and one differential (LVDS/HCSL) output. The output signals can be modulated using the spread spectrum feature of the PLL (programmable spread spectrum type, deviation and rate) for applications demanding low electromagnetic interference (EMI). Individual output enable pins OE[2:0] are available to enable/disable the outputs. Individual output voltage pins VDDO[2:0] are available to independently set the output voltage of each output. Up to four different configurations can be written into the device memory. Two selection pins (SEL[1:0]) allow the user to select the configuration to use. Using the PLL bypass mode, it is possible to get a copy of the input clock on any or all of the outputs. The device can be powered down using the Power Down pin (PD#). It is possible to program the internal input crystal load capacitance and the output drive current provided by the device. The device also has automatic gain control (crystal power limiting) circuitry which avoids the device overdriving the external crystal. Features • Member of the OmniClock Family of Programmable • • • • • • • • January, 2016 − Rev. 2 1 QFN16 CASE 485AE MARKING DIAGRAM 3V631 43Gxx ALYWG G 3V63143G xx A L Y W G = Specific Device Code = Specific Program Code (Default ‘00’ for Unprogrammed Part) = Assembly Location = Wafer Lot = Year = Work Week = Pb−Free Package (Note: Microdot may be in either location) ORDERING INFORMATION See detailed ordering and shipping information on page 20 of this data sheet. • Programmable Internal Crystal Load Capacitors • Programmable Output Drive Current for Single Ended Clock Generators Operating Power Supply: 1.8 V ± 0.1 V I/O Standards ♦ Inputs: LVCMOS, Fundamental Mode Crystal ♦ Outputs: 1.8 V LVCMOS ♦ Outputs: LVDS and HCSL 3 Programmable Single Ended (LVCMOS) Outputs from 8 kHz to 200 MHz 1 Programmable Differential Clock Output up to 200 MHz Input Frequency Range ♦ Crystal: 3 MHz to 50 MHz ♦ Reference Clock: 3 MHz to 200 MHz Configurable Spread Spectrum Frequency Modulation Parameters (Type, Deviation, Rate) Individual Output Enable Pins Independent Output Voltage Pins © Semiconductor Components Industries, LLC, 2016 www.onsemi.com • • • • • • • Outputs Power Saving Mode through Power Down Pin Programmable PLL Bypass Mode Programmable Output Inversion Programming and Evaluation Kit Available for Field Programming and Quick Evaluation Temperature Range −40°C to 85°C Packaged in 16−pin QFN These are Pb−Free Devices Typical Applications • eBooks and Media Players • Smart Wearables, Smart Phones, Portable Medical and • 1 Industrial Equipment Set Top Boxes, Printers, Digital Cameras and Camcorders Publication Order Number: NB3V63143G/D NB3V63143G BLOCK DIAGRAM VDD PD# SEL0 SEL1 Input Decoder Output control Crystal/Clock Control Configuration Memory VDDO0 Frequency and SS Reference XIN/ CLKIN Clock Crystal XOUT Output Divider PLL Block CMOS/ DIFF buffer OE0 Clock Buffer/ Crystal Oscillator And AGC Phase Detector Charge Pump VDDO1 VCO Output Divider CMOS/ DIFF buffer Feedback Divider VDDO2 PLL Bypass Mode Notes: 1. CLK0 and CLK1 can be configured to be one LVDS or HCSL output, or two single ended LVCMOS outputs. 2. Dotted lines are the programmable control signals to internal IC blocks. 3. OE[2:0], SEL[1:0] have internal pull up resistors. PD# has internal pull down resistor. Figure 1. Simplified Block Diagram XOUT 2 SEL0 SEL1 VDDO2 CLK2 PIN FUNCTION DESCRIPTION 1 16 15 14 13 NB3V63143G 12 VDD 11 VDDO1 GNDO (EPAD) 10 CLK1 GND 4 9 CLK0 OE1 OE0 6 7 8 VDDO0 3 OE2 PD# 5 Figure 2. Pin Connections (Top View) − QFN16 (with EPAD) www.onsemi.com 2 CMOS buffer CLK2 OE2 GNDO XIN/CLKIN CLK1 OE1 Output Divider GND CLK0 NB3V63143G Table 1. PIN DESCRIPTION Pin No. Pin Name Pin Type 1 XIN/CLKIN Input 3 MHz to 50 MHz crystal input connection or an external single ended reference input clock between 3 MHz and 200 MHz. Description 2 XOUT Output Crystal output. Float this pin when external reference clock is connected at XIN. 3 PD# Input 4 GND Ground 5, 6, 7 OE[2:0] Input 8 VDDO0 Power 9 CLK0 SE/DIFF Output Supports 8 kHz to 200 MHz Single Ended (LVCMOS) signals or Differential (LVDS/HCSL) signals. Using PLL Bypass mode, the output can also be a copy of the input clock. The single ended output will be LOW and differential outputs will be complementary LOW/HIGH until the PLL has locked and the frequency has stabilized. 10 CLK1 SE/DIFF Output Supports 8 kHz to 200 MHz Single Ended (LVCMOS) signals or Differential (LVDS/HCSL) signals. Using PLL Bypass mode, the output can also be a copy of the input clock. The single ended output will be LOW and differential outputs will be complementary LOW/HIGH until the PLL has locked and the frequency has stabilized. 11 VDDO1 Power CLK1 Output power supply ≤ VDD 12 VDD Power 1.8 V power supply. 13 CLK2 SE Output 14 VDDO2 Power 15, 16 SEL[1:0] Input EPAD GNDO Ground Asynchronous LVCMOS input. Active Low Master Reset to disable the device and set outputs Low. Internal pull−down resistor. This pin needs to be pulled High for normal operation of the chip. Power supply ground. 2−Level LVCMOS Inputs for Enabling/Disabling output clocks CLK[2:0] respectively. Internal pull−up resistor. CLK0 Output power supply ≤ VDD Supports 8 kHz to 200 MHz Single Ended (LVCMOS) signals. Using PLL Bypass mode, the output can also be a copy of the input clock. The single ended output will be LOW until the PLL has locked and the frequency has stabilized. CLK2 Output power supply ≤ VDD 2−Level LVCMOS Inputs for Configuration Selection. Configuration parameters include individual output frequencies, spread spectrum configuration, enable/disable status of each output, output type, internal crystal load capacitance configuration, etc. Configuration can be switched dynamically, but may require the PLL to re−lock. Internal pull−up resistor. Power supply ground for Outputs. Table 2. OUTPUT CONFIGURATION SELECT FUNCTION TABLE Table 4. OUTPUT ENABLE FUNCTION TABLE SEL1 SEL0 Output Configuration L L I L H II H L III H H IV OE[2:0] Function 0 CLK Disabled 1 CLK Enabled TYPICAL CRYSTAL PARAMETERS Crystal: Fundamental Mode Parallel Resonant Frequency: 3 MHz to 50 MHz Table 3. POWER DOWN FUNCTION TABLE Table 5. MAX CRYSTAL LOAD CAPACITORS RECOMMENDATION PD# Function 0 Device Powered Down Crystal Frequency Range Max Cap Value 1 Device Powered Up 3 MHz − 30 MHz 20 pF 30 MHz − 50 MHz 10 pF Shunt Capacitance (C0): 7 pF (Max) Equivalent Series Resistance 150 W (Max) www.onsemi.com 3 NB3V63143G FUNCTIONAL DESCRIPTION The NB3V63143G is a 1.8 V programmable, single ended/differential clock generator, designed to meet the timing requirements for consumer and portable markets. It has a small package size and it requires low power during operation and while in standby. This device provides the ability to configure a number of parameters as detailed in the following section. The One−Time Programmable memory allows programming and storing of up to four configurations in the memory space. 1.8 V VDDO0 R (Optional) 0.1 mF R (Optional) 0.01 mF 0.1 mF 0.01 mF VDD Crystal or Reference Clock Input VDDO0 XIN/CLKIN VDDO1 XOUT VDDO1 R (Optional) 0.1 mF 0.01 mF VDDO2 R (Optional) VDDO2 0.1 mF NB3V63143G 0.01 mF SEL0 GND GNDO CLK2 SEL1 Single Ended Clock CLK1 CLK0 Single Ended Clocks or Differential Clock LVDS/HCSL PD# OE0 OE1 OE2 Figure 3. Power Supply and Output Supply Noise Suppression Power Supply power supply can be as high as VDD. This feature removes the need for external voltage converters for each of the outputs thus reducing component count, saving board space and facilitating board design. In order to suppress power supply noise it is recommended to connect decoupling capacitors of 0.1 mF and 0.01 mF close to each VDDO pin as shown in Figure 3. Device Supply The NB3V63143G is designed to work with a 1.8 V VDD power supply. For VDD operation of 3.3 V/2.5 V, refer to the NB3H63143G datasheet. In order to suppress power supply noise it is recommended to connect decoupling capacitors of 0.1 mF and 0.01 mF close to the VDD pin as shown in Figure 3. Output Power Supply Each output CLK[2:0] has a separate output power supply VDDO[2:0] pin to control its output voltage. The output www.onsemi.com 4 NB3V63143G Clock Input maintain a good quality input clock signal level. This feature takes care of low clock swings fed from external reference clocks and ensures proper device operation. It also enables maximum compatibility with crystals from different manufacturers, processes, quality and performance. AGC also takes care of power dissipation in the crystal; avoids overdriving the crystal and thus extending the crystal life. In order to calculate the AGC gain accurately and avoid increasing the jitter on the output clocks, the user needs to provide the crystal load capacitance as well as other crystal parameters like ESR and shunt capacitance (C0). Input Frequency The clock input block can be programmed to use a fundamental mode crystal from 3 MHz to 50 MHz or a single ended reference clock source from 3 MHz to 200 MHz. When using output frequency modulation for EMI reduction, for optimal performance, it is recommended to use crystals with a frequency greater than 6.75 MHz as input. Crystals with ESR values of up to 150 W are supported. While using a crystal as input, it is important to set crystal load capacitor values correctly to achieve good performance. Programmable Clock Outputs Programmable Crystal Load Capacitors Output Type and Frequency The provision of internal programmable crystal load capacitors eliminates the necessity of external load capacitors for standard crystals. The internal load capacitors can be programmed to any value between 4.36 pF and 20.39 pF with a step size of 0.05 pF. Refer to Table 5 for recommended maximum load capacitor values for stable operation. There are three modes of loading the crystal − with internal chip capacitors only, with external capacitors only or with the both internal and external capacitors. Check with the crystal vendor’s load capacitance specification for setting of the internal load capacitors. The minimum value of 4.36 pF internal load capacitor need to be considered while selecting external capacitor value. The internal load capacitors will be bypassed when using an external reference clock. The NB3V63143G provides three independent single ended LVCMOS outputs, or one single ended LVCMOS output and one LVDS/HCSL differential output. The device supports any single ended output or differential output frequency from 8 kHz up to 200 MHz with or without frequency modulation. All outputs have individual output enable pins (refer to the Output Enable/Disable section on page 7). It should be noted that certain combinations of output frequencies and spread spectrum configurations may not be recommended for optimal and stable operation. For differential clocking, CLK0 and CLK1 can be configured as LVDS or HCSL. While using differential signaling format at the output, it is required to use only VDDO1 as output supply and use only the OE1 pin for the output enable function. (refer to the Application Schematic in Figure 4). When all 3 outputs are single ended, VDDO0 and OE0 have normal functionality. Automatic Gain Control (AGC) The Automatic Gain Control (AGC) feature adjusts the gain to the input clock based on its signal strength to VDDO2 ≤ VDD Crystal or Reference Clock Input VDDO2 XIN/CLKIN CLK2 XOUT NB3V63143G Single Ended Clock VDDO1 ≤ VDD VDDO1 VDDO0 CLK1 CLK0 OE2 PD# Differential Clock LVDS/HCSL OE0 OE1 Figure 4. Application Setup for Differential Output Configuration Programmable Output Drive provides further load drive and signal conditioning as per the application requirement. The drive strength or output current of each of the LVCMOS clock outputs is programmable independently. For each VDDO supply voltage, four distinct levels of LVCMOS output drive strengths can be selected as mentioned in DC Electrical Characteristics. This feature PLL BYPASS Mode PLL Bypass mode can be used to buffer the input clock on any of the outputs or all of the outputs. Any of the clock outputs can be programmed to generate a copy of the input clock. www.onsemi.com 5 NB3V63143G Output Inversion modulates the output of its PLL in order to “spread” the bandwidth of the synthesized clock, decreasing the peak amplitude at the center frequency and at the frequency’s harmonics. This results in significantly lower system EMI compared to the typical narrow band signal produced by oscillators and most clock generators. Lowering EMI by increasing a signal’s bandwidth is called ‘spread spectrum modulation’. All output clocks of the NB3V63143G can be phase inverted relative to each other. This feature can also be used in conjunction with the PLL BYPASS mode. Spread Spectrum Frequency Modulation Spread spectrum is a technique using frequency modulation to achieve lower peak electromagnetic interference (EMI). It is an elegant solution compared to techniques of filtering and shielding. The NB3V63143G Figure 5. Frequency Modulation or Spread Spectrum Clock for EMI Reduction For example, the minimum recommended reference frequency for a modulation rate of 30 kHz would be 30 kHz * 225 = 6.75 MHz. For 27 MHz, the maximum recommended modulation rate would be 27 MHz / 225 = 120 kHz The outputs of the NB3V63143G can be programmed to have either center spread from ±0.125% to ±3% or down spread from −0.25% to −4%. The programmable step size for spread spectrum deviation is 0.125% for center spread and 0.25% for down spread respectively. Additionally, the frequency modulation rate is also programmable. Frequency modulation from 30 kHz to 130 kHz can be selected. Spread spectrum, when on, applies to all the outputs of the device but not to output clocks that use the PLL bypass feature. There exists a tradeoff between the input clock frequency and the desired spread spectrum profile. For certain combinations of input frequency and modulation rate, the device operation could be unstable and should be avoided. For spread spectrum applications, the following limits are recommended: Fin (Min) = 6.75 MHz Fmod (range) = 30 kHz to 130 kHz Fmod (Max) = Fin / 225 Control Inputs Configuration Space Selection The SEL[1:0] pins are used to select one of the pre−programmed configurations statically or dynamically while the device is powered on. These pins are 2−level LVCMOS. Up to four configurations can be stored in the memory space of the device. Clock outputs can be independently enabled or disabled through the configuration space. To have a given clock output enabled, it must be enabled in both the configuration space and through its respective output enable pin. The PLL re−locking and stabilization time must be taken into consideration when dynamically changing the configurations. Table 6 shows an example of four configurations. For any input frequency selected, the above limits must be observed for a good spread spectrum profile. Table 6. EXAMPLE CONFIGURATION SPACE SETTINGS Configuration Selection Input Frequency Output Frequency VDD VDDO SS% SS Mod Rate Output Drive Output Inversion Output Enable PLL Bypass I 25 MHz CLK0=100 MHz CLK1=8 kHz CLK2=25 MHz 1.8 V VDDO0=1.8 V VDDO1=1.8 V VDDO2=1.8 V −0.5% 110 kHz CLK0=8mA CLK1=4mA CLK2=2mA CLK0=N CLK1=N CLK2=Y CLK0=Y CLK1=Y CLK2=Y CLK0=N CLK1=N CLK2=Y CLK2 Ref clk II 40 MHz CLK0=125 MHz CLK1=40 MHz CLK2=10 MHz 1.8 V VDDO0=1.8 V VDDO1=1.8 V VDDO2=1.8 V ±0.25% 30 kHz CLK0=4mA CLK1=4mA CLK2=4mA CLK0=N CLK1=N CLK2=N CLK0=Y CLK1=Y CLK2=Y CLK0=N CLK1=Y CLK2=N CLK1 Ref clk III 100 MHz CLK0=100 MHz CLK1=100 MHz CLK2=100 MHz 1.8 V VDDO0=1.8 V VDDO1=1.8 V VDDO2=1.8 V No SS NA CLK0=8mA CLK1=4mA CLK2=2mA CLK0=N CLK1=Y CLK2=Y CLK0=Y CLK1=Y CLK2=Y CLK0=Y CLK1=Y CLK2=Y All Three Outputs are Ref clks IV 25 MHz CLK0=100 MHz CLK1=100 MHz CLK2=48 MHz 1.8 V VDDO0=NA VDDO1=1.8 V VDDO2=1.8 V −1% 100 kHz CLK2=8mA CLK0=NA CLK1=NA CLK2=N CLK0=NA CLK1=Y CLK2=Y CLK0=NA CLK1=N CLK2=N CLK[1:0] is Differential Output www.onsemi.com 6 Notes NB3V63143G Output Enable/Disable device functions are disabled by default and when the PD# pin is pulled high the device functions are activated. Output Enable pins (OE[2:0]) are LVCMOS input pins that individually enable or disable the outputs CLK[2:0] respectively. These inputs only disable the output buffers thus not affecting the rest of the blocks on the device. When using a differential output, only the OE1 pin must be used to enable/disable the differential output (the OE0 pin will be ignored). The hardware OE pins have an effect only when the respective outputs are enabled in the configuration space. The output disable state can be set to high impedance (Hi−Z) or Low. Default Device State The NB3V63143G parts shipped from ON Semiconductor are blank, with no inputs/outputs programmed. The parts need to be programmed by the field sales or by a distributor or by the users themselves before they can be used. Programmable clock software downloadable from the ON Semiconductor website can be used along with the programming kit to achieve this purpose. For mass production, parts can be factory programmed with a customer qualified configuration and sourced from ON Semiconductor as a dash part number (Eg. NB3V63143G−01). Power Down Power saving mode can be activated though the power down PD# input pin. This input is an LVCMOS active Low Master Reset that disables the device and sets the outputs Low. By default it has an internal pull−down resistor. The Table 7. ATTRIBUTES Characteristic Value ESD Protection − Human Body Model 2 kV Internal Input Default State Pull Up/Down Resistor 50 kW Moisture Sensitivity, Indefinite Time Out of Dry Pack (Note 1) MSL1 Flammability Rating − Oxygen Index: 28 to 34 UL 94 V−0 @ 0.125in Transistor Count 130k Meets or Exceeds JEDEC Spec EIA/JESD78 IC Latchup Test 1. For additional information, see Application Note AND8003/D. ABSOLUTE MAXIMUM RATINGS (Note 2) Symbol VDD Parameter Positive Power Supply with Respect to Ground Rating Unit −0.5 to +4.6 V VI Input Voltage with Respect to Chip Ground −0.5 to VDD + 0.5 V TA Operating Ambient Temperature Range (Industrial Grade) −40 to +85 °C TSTG Storage Temperature −65 to +150 °C TSOL Max. Soldering Temperature (10 sec) 265 °C 32.3 24.22 °C/W °C/W qJA Thermal Resistance (Junction−to−Ambient) (Note 3) 0 lfpm 500 lfpm qJC Thermal Resistance (Junction−to−Case) 3.6 °C/W TJ Junction Temperature 125 °C Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. 2. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and not valid simultaneously. If stress limits are exceeded device functional operation is not implied, damage may occur and reliability may be affected. 3. JEDEC standard multilayer board − 2S2P (2 signal, 2 power). JESD51.7 type board. Back side Copper heat spreader area 100 sqmm, 2 oz (0.070mm) copper thichness. www.onsemi.com 7 NB3V63143G RECOMMENDED OPERATING CONDITIONS Symbol Min Typ Max Unit Core Power Supply Voltage 1.8 V operation 1.7 1.8 1.9 V Output Power Supply Voltage (Note 4) 1.8 V operation 1.7 1.8 1.9 V Clock output load capacitance for LVCMOS clock fout < 100 MHz fout ≥ 100 MHz 15 5 pF Crystal Input Frequency Reference Clock Frequency Fundamental Crystal Single ended clock input 50 200 MHz CX Xin / Xout pin stray capacitance (Note 5) 4.5 CXL Crystal load capacitance (Note 6) 10 ESR Crystal ESR VDD VDDO[2:0] CL fclkin Parameter Condition 3 3 pF pF 150 W Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond the Recommended Operating Ranges limits may affect device reliability. 4. The output power supply voltage VDDO[2:0] must always be less than or equal to core power supply voltage VDD. 5. The Xin/ Xout pin stray capacitance needs to be subtracted from crystal load capacitance (along with PCB and trace capacitance) while selecting appropriate load for the crystal in order to get minimum ppm error. 6. Refer to XTAL parameters supplied by the vendor. DC ELECTRICAL CHARACTERISTICS (VDD = 1.8 V ± 0.1V, VDDO[2:0] = 1.8 V ± 0.1V; GND = 0 V, TA = −40°C to 85°C, Notes 7 & 16) Parameter Symbol IDD_1.8 V Condition Min Typ Max Power Supply Current for Core Configuration Dependent. VDD = 1.8 V, TA = 25°C, XIN/CLKIN = 25 MHz (XTAL), CLK[0:2] = 100 MHz, 8 mA output drive IPD Power Down Supply Current PD# is Low to Make All Outputs OFF 20 mA VIH Input HIGH Voltage Pins XIN, SEL[1:0], OE[2:0] 0.65 VDD VDD V Pin PD# 0.85 VDD VDD Pins XIN, SEL[1:0], OE[2:0] 0 0.35 VDD Pin PD# 0 0.15 VDD VIL Input LOW Voltage 13 Unit mA V Zo Nominal Output Impedance Configuration Dependent. 8 mA Drive 22 W RPUP/PD Internal Pull Up/ Pull Down Resistor VDD = 1.8 V 150 kW Cprog Programmable Internal Crystal Load Capacitance Configuration Dependent 4.36 Programmable Internal Crystal Load Capacitance Resolution Cin Input Capacitance 20.39 pF 6 pF 0.05 Pins PD#, SEL[1:0], OE[2:0] 4 LVCMOS OUTPUTS VOH VOL Output HIGH Voltage 0.75xVDDO VDDO = 1.8 V IOH = 1 mA IOH = 2 mA IOH = 4 mA IOH = 8 mA VDDO = 1.8 V IOL = 1 mA IOL = 2 mA IOL = 4 mA IOL = 8 mA Output LOW Voltage V 0.25xVDDO www.onsemi.com 8 V NB3V63143G DC ELECTRICAL CHARACTERISTICS (continued) (VDD = 1.8 V ± 0.1V, VDDO[2:0] = 1.8 V ± 0.1V; GND = 0 V, TA = −40°C to 85°C, Notes 7 & 16) Symbol Parameter Condition Min Typ Max Unit LVCMOS OUTPUTS IDDO_LVCMOS LVCMOS Output Supply Current Configuration Dependent. TA = 25°C, CLK[0:2] = fout in PLL bypass mode Measured on VDDO = 1.8 V fout = 33.33 MHz, CL = 5 pF fout = 100 MHz, CL = 5 pF fout = 200 MHz, CL = 5 pF mA 3 8 16 HCSL OUTPUTS (Note 8) VOH_HCSL VOL_HCSL VCROSS Output HIGH Voltage (Note 9) mV VDDO = 1.8 V 700 VDDO = 1.8 V 0 Output Low Voltage (Note 9) mV Crossing Point Voltage (Notes 10 and 11) mV VDDO = 1.8 V Delta Vcross Change in Magnitude of Vcross for HCSL Output (Notes 10 and 12) VDDO = 1.8 V IDDO_HCSL Measured on VDDO0 = 1.8 V with 250 350 450 150 fout = 100 MHz, CL = 2 pF fout = 200 MHz, CL = 2 pF 22 mV mA LVDS OUTPUTS (Notes 10 and 13) VOD_LVDS Differential Output Voltage DeltaVOD_LVDS Change in Magnitude of VOD for Complementary Output States VOS_LVDS Offset Voltage Delta VOS_LVDS Change in Magnitude of VOS for Complementary Output States VOH_LVDS Output HIGH Voltage (Note 14) VDDO = 1.8 V VOL_LVDS Output LOW Voltage (Note 15) VDDO = 1.8 V 250 450 mV 0 25 mV VDDO = 1.8 V IDDO_LVDS fout = 100 MHz fout = 200 MHz 900 0 1100 700 mV 25 mV 1250 mV 800 mV 14 mA Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions. NOTE: Device will meet the specifications after thermal equilibrium has been established when mounted in a test socket or printed circuit board with maintained transverse airflow greater than 500 lfpm. 7. Measurement taken with single ended clock outputs terminated with test load capacitance of 5 pF and 15 pF and differential clock terminated with test load of 2 pF. See Figures 6, 7 and 10. 8. Measurement taken with outputs terminated with RS = 0 W, RL = 50 W, with test load capacitance of 2 pF. See Figure 8. Guaranteed by characterization. 9. Measurement taken from single ended waveform. 10. Measured at crossing point where the instantaneous voltage value of the rising edge of CLKx+ equals the falling edge of CLKx−. 11. Refers to the total variation from the lowest crossing point to the highest, regardless of which edge is crossing. Refers to all crossing points for this measurement. 12. Defined as the total variation of all crossing voltage of rising CLKx+ and falling CLKx−. This is maximum allowed variance in the VCROSS for any particular system. 13. LVDS outputs require 100 W receiver termination resistor between differential pair. See Figure 9. 14. VOHmax = VOSmax + 1/2 VODmax. 15. VOLmax = VOSmin − 1/2 VODmax. 16. Parameter guaranteed by design verification not tested in production. www.onsemi.com 9 NB3V63143G AC ELECTRICAL CHARACTERISTICS (VDD = 1.8 V ± 0.1 V, VDDO[2:0] = 1.8 V ± 0.1 V; VDDO ≤ VDD, GND = 0 V, TA = −40°C to 85°C, Notes 16, 17, 20, 21 and 22) Symbol fout fMOD SS SSstep SSCRED Parameter Condition Min Single Ended Output Frequency Typ Max Unit 0.008 200 MHz Spread Spectrum Modulation Rate fclkin ≥ 6.75 MHz 30 130 kHz Percent Spread Spectrum (deviation from nominal frequency) Down Spread 0 −4 % Center Spread 0 ±3 % Percent Spread Spectrum Change Step Size Down Spread Step Size 0.25 % Center Spread Step Size 0.125 % Spectral Reduction, 3rd harmonic @SS = −0.5%, fout = 100 MHz, fclkin = 25 MHz Crystal, RES BW at 30 kHz, All Output Types −10 dB tPU Stabilization Time from Power−up VDD = 1.8 V with Frequency Modulation ON 3.0 ms tPD Stabilization Time from Power Down Time from falling edge on PD pin to Tri−stated Outputs (Asynchronous) 3.0 ms tSEL Stabilization Time from Change of Configuration With Frequency Modulation ON 3.0 ms tOE1 Output Enable Time Time from rising edge on OE pin to valid clock outputs (asynchronous) 2/fout (MHz) ms tOE2 Output Disable Time Time from falling edge on OE pin to valid clock outputs (asynchronous) 2/fout (MHz) ms Synthesis Error Configuration Dependent 0 ppm Eppm SINGLE ENDED OUTPUTS (VDD = 1.8 V ± 0.1V, VDDO[2:0] = 1.8 V ± 0.1V; VDDO ≤ VDD, GND = 0 V, TA = −40 to 85°C) (Notes 16, 17, 20, 21 and 22) tJITTER−1.8 V tr / tf 1.8 V tDC Period Jitter Peak−to−Peak 25 MHz xtal input, fout = 100 MHz, SS off, Configuration Dependent (Note 22, see Figure 12) 100 Cycle−Cycle Jitter 25 MHz xtal input, fout = 100 MHz, SS off, Configuration Dependent (Note 22, see Figure 12) 100 Rise/Fall Time Measured between 20% to 80% with 15 pF load, fout = 100 MHz, VDD = VDDO = 1.8 V, Max Drive Min Drive Output Clock Duty Cycle VDD = 1.8 V; VDDO ≤ VDD Duty Cycle of Ref clock is 50% PLL Clock Reference Clock ps ns 1 2 % 45 40 50 50 55 60 DIFFERENTIAL OUTPUT (CLK1, CLK0) (VDD = 1.8 V ± 0.1V, VDDO[2:0] = 1.8 V ± 0.1V; VDDO ≤ VDD, GND = 0 V, TA = −40 to 85°C) (Notes 16, 17, 20, 21 and 22) tJITTER−1.8 V tr 1.8 V Period Jitter Peak−to−Peak Configuration Dependent. 25 MHz xtal input, fout = 100 MHz, SS off, CLK2 = OFF (Note 18, 20 and 22, see Figure 12) 100 Cycle−Cycle Jitter Configuration Dependent. 25 MHz xtal input, fout = 100 MHz, SS off, CLK2 = OFF (Note 19, 20 and 22, see Figure 12) 100 Rise Time Measured between 20% to 80%, VDD = 1.8 V 175 LVDS HCSL www.onsemi.com 10 ps 700 ps NB3V63143G AC ELECTRICAL CHARACTERISTICS (continued)(VDD = 1.8 V ± 0.1 V, VDDO[2:0] = 1.8 V ± 0.1 V; VDDO ≤ VDD, GND = 0 V, TA = −40°C to 85°C, Notes 16, 17, 20, 21 and 22) Symbol Parameter Condition Min Typ Max Unit DIFFERENTIAL OUTPUT (CLK1, CLK0) (VDD = 1.8 V ± 0.1V, VDDO[2:0] = 1.8 V ± 0.1V; VDDO ≤ VDD, GND = 0 V, TA = −40 to 85°C) (Notes 16, 17, 20, 21 and 22) tf 1.8 V tDC Fall Time Measured between 20% to 80% with 2 pF load, VDD = 1.8 V LVDS HCSL Output Clock Duty Cycle VDD = 1.8 V; Duty Cycle of Ref clock is 50% PLL Clock Reference Clock 175 700 ps % 45 40 50 50 55 60 Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions. NOTE: Device will meet the specifications after thermal equilibrium has been established when mounted in a test socket or printed circuit board with maintained transverse airflow greater than 500 lfpm. 17. Measurement taken from single ended clock terminated with test load capacitance of 5 pF and 15 pF and differential clock terminated with test load of 2 pF. See Figures 6, 7 and 10. 18. Measurement taken from single ended waveform. 19. Measurement taken from differential waveform. 20. AC performance parameters like jitter change based on the output frequency, spread selection, power supply and loading conditions of the output. For application specific AC performance parameters, please contact ON Semiconductor. 21. Measured at fout = 100 MHz, No Frequency Modulation, fclkin = 25 MHz fundamental mode crystal and output termination as described in Parameter Measurement Test Circuits 22. Period jitter Sampled with 10000 cycles, Cycle−cycle jitter sampled with 1000 cycles. Jitter measurement may vary. Actual jitter is dependent on Input jitter and edge rate, number of active outputs, inputs and output frequencies, supply voltage, temperature, and output load. www.onsemi.com 11 SEL1 SEL1 NB3V63143G www.onsemi.com 12 OE0 1.8 V 1.8 V VDDO1 VDDO0 VDD − − VDD 1.8 V VDDO2 1.8 V (LVDS/HCSL) − − VDD 1.8 V VDD VDD 1.8 V MIN 1.8 V MAX Differential Signal OE2 1.8 V OE1 MIN Single Ended Signal PD# RL Zo = 50 W Optional Optional LVDS HCSL 100 Open RD Open Open 50 RL Open Open 2 pF CL Open Differential Clock Termination CL CL RD Open Open RC Open Open Open RV Open Receiver VCC 23. Receiver VCC must be at same supply potential as VDDO1 for differential clock outputs. 24. All resistor values are in ohms. 25. VDDO [2:0] <= VDD always RS Optional Zo = 50 W Zo = 50 W Differential Clock Single Ended Clock Signaling Type LVCMOS RL RS (Optional) RS (Optional) RS (Optional) MAX CLK0 CLK1 CLK2 PD# OE0 OE1 OE2 GND GNDO SEL0 XOUT VDDO1 VDDO0 VDDO1 VDDO2 VDDO0 VDDO2 XIN/CLKIN VDD SEL0 Reference Clock Input or Crystal 1.8 V NB3V63143G SCHEMATIC FOR OUTPUT TERMINATION Figure 6. Typical Termination for Single Ended and Differential Signaling Device Load NB3V63143G PARAMETER MEASUREMENT TEST CIRCUITS CLKx LVCMOS Clock Hi−Z Probe CL Measurement Equipment Figure 7. LVCMOS Parameter Measurement CLK1 Hi−Z Probe 2 pF HCSL Clock Measurement Equipment Hi−Z Probe CLK0 50 W 2 pF 50 W Figure 8. HCSL Parameter Measurement CLK1 LVDS Clock Hi−Z Probe Measurement Equipment 100 W Hi−Z Probe CLK0 Figure 9. LVDS Parameter Measurement www.onsemi.com 13 NB3V63143G TIMING MEASUREMENT DEFINITIONS t2 tDC = 100 * t1 / t2 t1 VDDO 80% of VDDO 50% of VDDO 20% of VDDO LVCMOS Clock Output GND tF tR Figure 10. LVCMOS Measurement for AC Parameters t2 tDC = 100 * t1/t2 tPeriod = t2 t1 80% 80% Vcross = 50% of output swing 20% DVcross 20% tR tF Figure 11. Differential Measurement for AC Parameters tperiod−jitter 50% of CLK Swing Clock Output tNcycle t(N+1)cycle 50% of CLK Swing Clock Output tCTC−jitter = t(N+1)cycle − tNcycle (over 1000 cycles) Figure 12. Period and Cycle−Cycle Jitter Measurement www.onsemi.com 14 NB3V63143G Toutput enable Toutput disable OE VIH VIL CLK Output With Hi-Z in disable mode ÏÏÏÏÏÏ High-Z ÏÏÏÏÏÏ CLK Output with output Low in disable mode Tpower-up Tpower-down PD# VIH VIL CLK Output Figure 13. Output Enable/ Disable and Power Down Functions www.onsemi.com 15 NB3V63143G APPLICATION GUIDELINES Crystal Input Interface Output Interface and Terminations Figure 14 shows the NB3V63143G device crystal oscillator interface using a typical parallel resonant fundamental mode crystal. A parallel crystal with loading capacitance CL = 18 pF would use C1 = 32 pF and C2 = 32 pF as nominal values, assuming 4 pF of stray capacitance per line. The NB3V63143G consists of a unique Multi Standard Output Driver to support LVCMOS, LVDS and HCSL standards. Termination techniques required for each of these standards are different to ensure proper functionality. From the device it is possible to switch off one output driver and turn on another output driver using the SEL[1:0] pins as part of the Configuration Settings. The required termination changes must be considered and taken care of by the system designer. C L + (C1 ) Cstray)ń2; C1 + C2 The frequency accuracy and duty cycle skew can be fine−tuned by adjusting the C1 and C2 values. For example, increasing the C1 and C2 values will reduce the operational frequency. Note R1 is optional and may be 0 W. LVCMOS Interface LVCMOS output swings rail−to−rail up to VDDO supply and can drive up to 15 pF load at higher drive stengths. The output buffer’s drive is programmable up to four steps, though the drive current will depend on the step setting as well as the VDDO supply voltage. (See Figure 15 and Table 8). Drive strength must be configured high for driving higher loads. The slew rate of the clock signal increases with higher output current drive for the same load. The software lets the user choose the load drive current value per LVCMOS output based on the VDDO supply selected. Figure 14. Crystal Interface Loading Table 8. LVCMOS DRIVE LEVEL SETTINGS VDDO Supply Load Current Setting 3 Max Load Current Load Current Setting 2 Load Current Setting 1 Load Current Setting 0 Min Load Current 1.8 V 8 mA 4 mA 2 mA 1 mA The IDDO current consists of the static current component (varies with drive) and dynamic current component. For any VDDO, the IDDO dynamic current range per LVCMOS output can be approximated by the following: Cload includes the load capacitor connected to the output, the pin capacitor posed by the output pin (typically 5 pF) and the cap load posed by the receiver input pin. Cload = (CL + Cpin+ Cin) An optional series resistor Rs can be connected at the output for impedance matching, to limit the overshoots and ringings. IDDO + f out * C load * VDDO www.onsemi.com 16 NB3V63143G VDD Drive Strength selection CLKx Drive Strength selection Figure 15. Simplified LVCMOS Output Structure LVDS Interface Differential signaling like LVDS has inherent advantage of common mode noise rejection and low noise emission, and thus a popular choice for clock distribution in systems. TIA/EIA−644 or LVDS is a standard differential, point−to−point bus topology that supports fast switching speeds and has the benefit of low power consumption. The driver consists of a low swing differential with constant current of 3.5 mA through the differential pair, and generates switching output voltage across a 100 W terminating resistor (externally connected or internal to the receiver). Power dissipation in LVDS standard ((3.5 mA)2 x 100 W = 1.2 mW) is thus much lower than other differential signalling standards. A fan−out LVDS buffer (like ON Semiconductor’s NB6N1xS and NB6L1xS) can be used as an extension to provide clock signal to multiple LVDS receivers to drive multiple point−to−point links to receiving node. VDDO Iss CLK 1 + RT 100 W Vout _ CLK 0 + Vin _ Iss Figure 16. Simplified LVDS Output Structure with Termination www.onsemi.com 17 NB3V63143G HCSL Termination overshoot and ringing due to the rapid rise of current from the output driver. The open source driver has high internal impedance; thus a series resistor up to 33 W does not affect the signal integrity. This resistor can be avoided for VDDO supply (1.8 V) of operation, unless impedance matching requires it. HCSL is a differential signaling standard commonly used in PCIe systems. The HCSL driver is typical 14.5 mA switched current open source output that needs a 50 W termination resistor to ground near the source, and generates 725 mV of signal swing. A series resistor (10 W to 33 W) is optionally used to achieve impedance matching by limiting 14.5mA 2.6mA CLK1 CLK0 50 W 50 W Figure 17. Simplified HCSL Output Structure with Termination Field Programming Kit and Software depends on the trace length and the propogation delay. For eg. On an FR4 PCB with approximately 150 ps/inch of propogation rate on a 2 inch trace, the ripple frequency = 1 / (150 ps * 2 inch * 5) = 666.6 MHz; [5 = number of times the signal travels, 1 trip to receiver plus 2 additional round trips]. PCB traces should be terminated when trace length >= tr/f / (2* tprate); tf/t = rise/ fall time of signal, tprate = propagation rate of trace. The NB3V63143G can be programmed by the user using the ‘Clock Cruiser Programmable Clock Kit’. This device uses the 16L daughter card on the hardware kit. To design a new clock, ‘Clock Cruiser Software’ is required to be installed from the ON Semiconductor website. The user manuals for the hardware kit Clock Cruiser Programmable Clock Kit and Clock Cruiser Software can be found following this link www.onsemi.com. ÌÌÑ Recommendation for Clock Performance Overshoot (Positive) Clock performance is specified in terms of Jitter in the time domain. Details and measurement techniques of Cycle−cycle jitter, period jitter, TIE jitter and Phase Noise are explained in application note AND8459/D. In order to have a good clock signal integrity for minimum data errors, it is necessary to reduce the signal reflections. The reflection coefficient can be zero only when the source impedance equals the load impedance. Reflections are based on signal transition time (slew rate) and due to impedance mismatch. Impedance matching with proper termination is required to reduce the signal reflections. The amplitude of overshoots is due to the difference in impedance and can be minimized by adding a series resistor (Rs) near the output pin. Greater the difference in impedance, greater is the amplitude of the overshoots and subsequent ripples. The ripple frequency is dependant on the signal travel time from the receiver to the source. Shorter traces results in higher ripple frequency, as the trace gets longer the travel time increases, reducing the ripple frequency. The ripple frequency is independent of signal frequency, and only Ringing ÌÌÌÑ Overshoot (Negative) Figure 18. Signal Reflection Components www.onsemi.com 18 NB3V63143G PCB Design Recommendation source or the receiver. In an optimum layout all components are on the same side of the board, minimizing vias through other signal layers. For a clean clock signal waveform it is necessary to have a clean power supply for the device. The device must be isolated from system power supply noise. A 0.1 mF and a 2.2 mF decoupling capacitor should be mounted on the component side of the board as close to the VDD pin as possible. No vias should be used between the decoupling capacitor and VDD pin. The PCB trace to VDD pin and the ground via should be kept as thick and as short as possible. All the VDD pins should have decoupling capacitors. Stacked power and ground planes on the PCB should be large. Signal traces should be on the top layer with minimum vias and discontinuities and should not cross the reference planes. The termination components must be placed near the VDD PD# Device Applications The NB3V63143G is targeted mainly for the Consumer market segment and can be used as per the examples below. Clock Generator Consumer applications like a Set top Box, have multiple sub−systems and standard interfaces and require multiple reference clock sources at various locations in the system. This part can function as a clock generating IC for such applications generating a reference clock for interfaces like USB, Ethernet, Audio/Video, ADSL, PCI etc. SEL0 SEL1 Input Decoder Output control Crystal /Clock Control Configuration Memory VDDO0 Frequency and SS Reference Clock XIN/CLKIN Crystal XOUT Clock Buffer/ Crystal Oscillator And AGC Output Divider PLL Block 25MHz Phase Detector Charge Pump CMOS/ DIFF buffer 27MHz Video 48MHz USB 25MHz Ethernet OE0 VDDO1 VCO Output Divider CMOS / DIFF buffer Feedback Divider CLK1 OE1 VDDO2 Output Divider PLL Bypass Mode GND CLK0 CMOS buffer CLK2 OE2 GNDO Figure 19. Application as Clock Generator Buffer and Logic/Level Translator The NB3V63143G is useful as a simple CMOS Buffer in PLL bypass mode. One or more outputs can use the PLL Bypass mode to generate the buffered outputs. If the PLL is configured to use spread spectrum, all outputs using PLL Bypass feature will not be subjected to the spread spectrum. The device can be simultaneously used as logic translator for converting the LVCMOS input clock to LVDS, HCSL or LVCMOS (with different output voltage level). For instance in applications like an LCD monitor, for converting the LVCMOS input clock to LVDS output. www.onsemi.com 19 NB3V63143G VDD PD# SEL0 SEL1 Input Decoder Output control Crystal /Clock Control Configuration Memory VDDO0 Frequency and SS Clock Buffer/ Crystal Oscillator And AGC Reference XIN/CLKIN Clock XOUT LVCMOS PLL Block Charge Pump Phase Detector CMOS/ DIFF buffer Output Divider CLK0 OE0 VDDO1 VCO CMOS / DIFF buffer Output Divider CLK1 Feedback Divider OE1 VDDO2 Output Divider CMOS buffer NOTE: GNDO LVCMOS CLK2 PLL Bypass Mode GND LVDS OE2 Figure 20. Application as Level Translator Since the device requirement is VDDO ≤ VDD, LVCMOS signal level cannot be translated to a higher level of LVCMOS voltage. EMI Attenuator clock outputs (not bypass outputs) even if they are at different frequencies. In Figure 21, CLK0 uses the PLL and hence is subjected to the spread spectrum modulation while CLK1 and CLK2 use the PLL Bypass mode and hence are not subjected to the spread spectrum modulation. Spread spectrum through frequency modulation technique enables the reduction of EMI radiated from the high frequency clock signals by spreading the spectral energy to the nearby frequencies. While using frequency modulation, the same selection is applied to all the PLL VDD PD# SEL0 SEL1 Input Decoder Output control Crystal /Clock Control Configuration Memory VDDO0 Frequency and SS Reference Clock XIN/CLKIN Crystal XOUT Clock Buffer/ Crystal Oscillator And AGC Output Divider PLL Block Phase Detector Charge Pump CMOS/ DIFF buffer CMOS / DIFF buffer Feedback Divider PLL Bypass Mode GNDO CPU CLK1 12MHz USB1 12MHz USB2 OE1 VDDO2 Output Divider GND 12MHz +/- 0.375 % OE0 VDDO1 VCO Output Divider 12MHz CLK0 CMOS buffer CLK2 OE2 Figure 21. Application as EMI Attenuator ORDERING INFORMATION Type Package Shipping† NB3V63143G00MNR2G Blank Device QFN−16 (Pb−Free) 3000 / Tape & Reel NB3V63143GxxMNR2G Factory Pre−programmed Device QFN−16 (Pb−Free) 3000 / Tape & Reel Device †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. †Note: Please contact your ON Semiconductor sales representative for availability in tube. www.onsemi.com 20 NB3V63143G PACKAGE DIMENSIONS QFN16 3x3, 0.5P CASE 485AE ISSUE B D A B ÇÇ ÇÇ PIN 1 LOCATION L1 DETAIL A ALTERNATE TERMINAL CONSTRUCTIONS E ÉÉÉ ÉÉÉ 0.15 C EXPOSED Cu 0.15 C TOP VIEW 0.10 C NOTES: 1. DIMENSIONING AND TOLERANCING PER ASME Y14.5M, 1994. 2. CONTROLLING DIMENSION: MILLIMETERS. 3. DIMENSION b APPLIES TO PLATED TERMINAL AND IS MEASURED BETWEEN 0.25 AND 0.30 MM FROM TERMINAL. 4. COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS THE TERMINALS. 5. OUTLINE MEETS JEDEC DIMENSIONS PER MO−220, VARIATION VEED−6. L L A1 DETAIL B (A3) DETAIL B MOLD CMPD ÉÉ ÉÉ ÇÇ DIM A A1 A3 b D D2 E E2 e K L L1 A3 ALTERNATE CONSTRUCTIONS A 0.08 C A1 SIDE VIEW NOTE 4 C SEATING PLANE D2 16X L RECOMMENDED SOLDERING FOOTPRINT* DETAIL A 5 8 3.30 9 4 16X MILLIMETERS MIN MAX 0.80 1.00 0.00 0.05 0.20 REF 0.18 0.30 3.00 BSC 1.25 1.55 3.00 BSC 1.25 1.55 0.50 BSC 0.20 −−− 0.30 0.50 0.00 0.15 16X 0.65 PACKAGE OUTLINE E2 K 1 1 b 0.10 C A B 12 16 3.30 13 16X 0.05 C NOTE 3 e e/2 BOTTOM VIEW 16X 0.30 0.50 PITCH DIMENSIONS: MILLIMETERS *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. ON Semiconductor and the are registered trademarks of Semiconductor Components Industries, LLC (SCILLC) or its subsidiaries in the United States and/or other countries. SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. 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SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor 19521 E. 32nd Pkwy, Aurora, Colorado 80011 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada Email: [email protected] N. American Technical Support: 800−282−9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81−3−5817−1050 www.onsemi.com 21 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative NB3V63143G/D