SL28774ELC

SL28774 EProClock® Generator for Intel Calpella Chipset Features • 100MHz Differential SATA clocks • Intel CK505 Clock Revision 1.0 Compliant • Hybrid Video Support - Simultaneous DOT96, 27MHz_SS and 27MHz_NSS video clocks • 96MHz Differential DOT clock • 27MHz Video clock • Buffered Reference Clock 14.318MHz • PCI-Express Gen 2 Compliant • PC EProClock® Programmable Technology • Low power push-pull type differential output buffers • I2C support with readback capabilities • Integrated voltage regulator • Industrial Temperature -40oC to 85oC • Integrated resistors on differential clocks • Triangular Spread Spectrum profile for maximum electromagnetic interference (EMI) reduction CPU SRC x2 x1 SATA DOT96 REF 27M x1 x1 x1 x2 CKPWRGD/ PD# VSS_REF SCLK XTAL_OUT Pin Configuration Block Diagram XTAL_IN • 100MHz Differential SRC clocks • 32-pin QFN package VDD_REF • Differential CPU clocks with selectable frequency • 3.3V Power supply REF0/ FS** • Wireless friendly 3-bits slew rate control on single-ended clocks. SDATA • Scalable low voltage VDD_IO (3.3V to 1.05V) 32 31 30 29 28 27 26 25 24 VDD_CPU VDD_DOT 1 VSS_DOT 2 23 CPU0 DOT96 3 DOT96# 4 22 CPU#0 VDD_27 5 27_NSS 6 20 CPU1 21 VSS_CPU 19 CPU#1 18 VDD_CPU_IO 27_SS 7 VSS_27 8 17 VDD_SRC 27_OE# VDD_SRC_IO SRC1# SRC1 VSS_SRC SRC0 / SATA SRC0# / SATA# VSS_SATA 9 10 11 12 13 14 15 16 ** Internal 100K-ohm Pull-Down Resistor ........................ Document #: 001-08400 Rev ** Page 1 of 19 400 West Cesar Chavez, Austin, TX 78701 1+(512) 416-8500 1+(512) 416-9669 www.silabs.com SL28774 32-QFN Pin Definitions Pin No. 1 Name VDD_DOT Type PWR Description 3.3V Power supply for outputs and PLL 2 VSS_DOT 3 DOT96 O, DIF Fixed true 96MHz clock output GND Ground for outputs 4 DOT96# O, DIF Fixed complement 96MHz clock output 5 VDD_27 PWR 3.3V Power supply for 27MHz PLL Non-spread 27MHz video clock output 6 27M_NSS O,SE 7 27M_SS O, SE Spread 27MHz video clock output 8 VSS_27 GND Ground for 27MHz PLL 9 VSS_SATA GND Ground for outputs 10 SRC0 / SATA O, DIF 100MHz True differential serial reference clock 11 SRC0# / SATA# O, DIF 100MHz Complement differential serial reference clock 12 VSS_SRC 13 SRC1 O, DIF 100MHz True differential serial reference clock GND 14 SRC1# O, DIF 100MHz Complement differential serial reference clock 15 VDD_SRC_IO 16 27_OE# 17 VDD_SRC 18 VDD_CPU_IO 19 CPU1# O, DIF Complement differential CPU clock output 20 CPU1 O, DIF True differential CPU clock output 21 VSS_CPU 22 CPU0# O, DIF Complement differential CPU clock output 23 CPU0 O, DIF True differential CPU clock output 24 VDD_CPU 25 CKPWRGD/PD# PWR I Ground for PLL Scalable 3.3V to 1.05V power supply for output buffer 3.3V tolerance input pin to enable and disable both 27_NSS and 27_SS PWR 3.3V Power supply for PLL PWR Scalable 3.3V to 1.05V power supply for output buffer GND PWR I Ground for PLL 3.3V Power supply for CPU PLL 3.3V LVTTL input. This pin is a level sensitive strobe used to latch the FS. After CKPWRGD (active HIGH) assertion, this pin becomes a real-time input for asserting power down (active LOW) 26 VSS_REF GND 27 XOUT O, SE 14.318MHz Crystal output 28 XIN 29 VDD_REF 30 REF/FS** I PWR Ground for outputs 14.318MHz Crystal input 3.3V Power supply for outputs and also maintains SMBUS registers during power-down PD, I/O 3.3V tolerant input for Graphic clock selection/fixed 14.318MHz clock output. (Internal 100K-ohm pull-down resistor on FS pin) Refer to DC Electrical Specifications table for Vil_FS and Vih_FS specifications 31 SDATA I/O 32 SCLK I SMBus compatible SDATA SMBus compatible SCLOCK ........................Document #: 001-08400 Rev ** Page 2 of 19 SL28774 PC EProClock® Programmable Technology PC EProClock® is the world’s first non-volatile programmable PC clock. The PC EProClock® technology allows board designer to promptly achieve optimum compliance and clock signal integrity; historically, attainable typically through device and/or board redesigns. PC EProClock® technology can be configured through SMBus or hard coded. - Differential skew control on true or compliment or both - Differential duty cycle control on true or compliment or both - Differential amplitude control - Differential and single-ended slew rate control Features: - Program Internal or External series resistor on single-ended clocks - > 4000 bits of configurations - Program different spread profiles - Can be configured through SMBus or hard coded - Program different spread modulation rate - Custom frequency sets - For more information: Please refer to Application Note #25 Frequency Select Pin (FS) FS CPU Power On 0 133MHz Default 1 100MHz SRC SATA DOT96 27MHz REF 100MHz 100MHz 96MHz 27MHz 14.318MHz Frequency Select Pin FS Apply the appropriate logic levels to FS inputs before CKPWRGD assertion to achieve host clock frequency selection. When the clock chip sampled HIGH on CKPWRGD and indicates that VTT voltage is stable then FS input values are sampled. This process employs a one-shot functionality and once the CKPWRGD sampled a valid HIGH, all other FS, and CKPWRGD transitions are ignored except in test mode. Serial Data Interface To enhance the flexibility and function of the clock synthesizer, a two-signal serial interface is provided. Through the Serial Data Interface, various device functions, such as individual clock output buffers are individually enabled or disabled. The registers associated with the Serial Data Interface initialize to their default setting at power-up. The use of this interface is optional. Clock device register changes are normally made at system initialization, if any are required. The interface cannot be used during system operation for power management functions. Data Protocol The clock driver serial protocol accepts byte write, byte read, block write, and block read operations from the controller. For block write/read operation, access the bytes in sequential order from lowest to highest (most significant bit first) with the ability to stop after any complete byte is transferred. For byte write and byte read operations, the system controller can access individually indexed bytes. The offset of the indexed byte is encoded in the command code described in Table 1. The block write and block read protocol is outlined in Table 2 while Table 3 outlines byte write and byte read protocol. The slave receiver address is 11010010 (D2h). . Table 1. Command Code Definition Bit 7 Description 0 = Block read or block write operation, 1 = Byte read or byte write operation (6:0) Byte offset for byte read or byte write operation. For block read or block write operations, these bits should be '0000000' Table 2. Block Read and Block Write Protocol Block Write Protocol Bit 1 8:2 9 10 18:11 19 27:20 28 Description Start Slave address–7 bits Write Acknowledge from slave Command Code–8 bits Block Read Protocol Bit 1 8:2 9 10 18:11 Description Start Slave address–7 bits Write Acknowledge from slave Command Code–8 bits Acknowledge from slave 19 Acknowledge from slave Byte Count–8 bits 20 Repeat start Acknowledge from slave ........................Document #: 001-08400 Rev ** Page 3 of 19 27:21 Slave address–7 bits SL28774 Table 2. Block Read and Block Write Protocol (continued) Block Write Protocol Bit 36:29 37 45:38 Description Data byte 1–8 bits Acknowledge from slave Data byte 2–8 bits Block Read Protocol Bit Read = 1 29 Acknowledge from slave 37:30 46 Acknowledge from slave .... Data Byte /Slave Acknowledges .... Data Byte N–8 bits .... Acknowledge from slave .... Stop Description 28 38 46:39 47 55:48 Byte Count from slave–8 bits Acknowledge Data byte 1 from slave–8 bits Acknowledge Data byte 2 from slave–8 bits 56 Acknowledge .... Data bytes from slave / Acknowledge .... Data Byte N from slave–8 bits .... NOT Acknowledge .... Stop Table 3. Byte Read and Byte Write Protocol Byte Write Protocol Bit 1 8:2 9 10 18:11 19 27:20 Description Start Slave address–7 bits Write Acknowledge from slave Command Code–8 bits Byte Read Protocol Bit 1 8:2 9 10 18:11 Description Start Slave address–7 bits Write Acknowledge from slave Command Code–8 bits Acknowledge from slave 19 Acknowledge from slave Data byte–8 bits 20 Repeated start 28 Acknowledge from slave 29 Stop 27:21 28 29 37:30 ........................Document #: 001-08400 Rev ** Page 4 of 19 Slave address–7 bits Read Acknowledge from slave Data from slave–8 bits 38 NOT Acknowledge 39 Stop SL28774 Control Registers Byte 0: Control Register 0 Bit @Pup Name Description 7 HW FS 6 0 RESERVED RESERVED 5 1 RESERVED RESERVED 4 0 iAMT_EN 3 0 RESERVED 2 0 SRC_Main_SEL 1 0 SATA_SEL Select source of SATA clock 0 = SATA = SRC_MAIN, 1= SATA = PLL4 0 1 PD_Restore Save configuration when PD# is asserted 0 = Config. cleared, 1 = Config. saved CPU Frequency Select Bit, set by HW 0 = 133MHz, 1= 100MHz iAMT Enable 0 = Legacy Mode, 1 = iAMT Enabled RESERVED Select source for SRC clock 0 = SRC_MAIN = PLL1, PLL3_CFG Table applies 1 = SRC_MAIN = PLL3, PLL3_CFG Table does not apply Byte 1: Control Register 1 Bit @Pup Name 7 1 RESERVED 6 0 PLL1_SS_DC Select for down or center SS 0 = Down spread, 1 = Center spread 5 0 PLL3_SS_DC Select for down or center SS 0 = Down spread, 1 = Center spread 4 0 PLL3_CFB3 3 0 PLL3_CFB2 2 1 PLL3_CFB1 1 0 PLL3_CFB0 0 1 RESERVED Description RESERVED CFB Bit [4:1] only applies when SRC_Main_SEL = 0 (Byte 0, bit 2 =0) See Table 4 on page 9 for Configuration. RESERVED Byte 2: Control Register 2 Bit @Pup Name 7 1 REF_OE Description 6 1 RESERVED RESERVED 5 1 RESERVED RESERVED 4 1 RESERVED RESERVED 3 1 RESERVED RESERVED 2 1 RESERVED RESERVED 1 1 RESERVED RESERVED 0 1 RESERVED RESERVED Output enable for REF 0 = Output Disabled, 1 = Output Enabled Byte 3: Control Register 3 Bit @Pup Name Description 7 1 RESERVED RESERVED 6 1 RESERVED RESERVED 5 1 RESERVED RESERVED ........................Document #: 001-08400 Rev ** Page 5 of 19 SL28774 Byte 3: Control Register 3 4 1 RESERVED RESERVED 3 1 RESERVED RESERVED 2 1 RESERVED RESERVED 1 1 RESERVED RESERVED 0 1 RESERVED RESERVED Byte 4: Control Register 4 Bit @Pup Name Description 7 1 RESERVED 6 1 SATA_OE Output enable for SATA 0 = Output Disabled, 1 = Output Enabled 5 1 SRC_OE Output enable for SRC 0 = Output Disabled, 1 = Output Enabled 4 1 DOT96_OE Output enable for DOT96 0 = Output Disabled, 1 = Output Enabled 3 1 CPU1_OE Output enable for CPU1 0 = Output Disabled, 1 = Output Enabled 2 1 CPU0_OE Output enable for CPU0 0 = Output Disabled, 1 = Output Enabled 1 1 PLL1_SS_EN Enable PLL1s spread modulation, 0 = Spread Disabled, 1 = Spread Enabled 0 1 PLL3_SS_EN Enable PLL3s spread modulation 0 = Spread Disabled, 1 = Spread Enabled RESERVED Byte 5: Control Register 5 Bit @Pup Name Description 7 0 RESERVED RESERVED 6 0 RESERVED RESERVED 5 0 RESERVED RESERVED 4 0 RESERVED RESERVED 3 0 RESERVED RESERVED 2 0 RESERVED RESERVED 1 0 RESERVED RESERVED 0 0 RESERVED RESERVED Byte 6: Control Register 6 Bit @Pup Name Description 7 0 RESERVED RESERVED 6 0 RESERVED RESERVED 5 0 REF Bit1 4 0 RESERVED RESERVED 3 0 27MHz Bit 1 27MHz slew rate control (see Byte 13 for Slew Rate Bit 0 and Bit 2) 0 = High, 1 = Low 2 0 RESERVED RESERVED 1 0 RESERVED RESERVED 0 0 RESERVED RESERVED REF slew rate control (see Byte 13 for Slew Rate Bit 0 and Bit 2) 0 = High, 1 = Low ........................Document #: 001-08400 Rev ** Page 6 of 19 SL28774 Byte 7: Vendor ID Bit @Pup Name 7 0 Rev Code Bit 3 Revision Code Bit 3 Description 6 1 Rev Code Bit 2 Revision Code Bit 2 5 0 Rev Code Bit 1 Revision Code Bit 1 4 0 Rev Code Bit 0 Revision Code Bit 0 3 1 Vendor ID bit 3 Vendor ID Bit 3 2 0 Vendor ID bit 2 Vendor ID Bit 2 1 0 Vendor ID bit 1 Vendor ID Bit 1 0 0 Vendor ID bit 0 Vendor ID Bit 0 Byte 8: Control Register 8 Bit @Pup Name 7 1 Device_ID3 RESERVED Description 6 0 Device_ID2 RESERVED 5 0 Device_ID1 RESERVED 4 0 Device_ID0 RESERVED 3 0 RESERVED RESERVED 2 0 RESERVED RESERVED 1 1 27M_non-SS_OE Output enable for 27M_non-SS 0 = Output Disabled, 1 = Output Enabled 0 1 27M_SS_OE Output enable for 27M_SS 0 = Output Disabled, 1 = Output Enabled Byte 9: Control Register 9 Bit @Pup Name Description 7 0 RESERVED RESERVED 6 0 RESERVED RESERVED 5 1 RESERVED RESERVED 4 0 TEST _MODE_SEL Test mode select either REF/N or tri-state 0 = All outputs tri-state, 1 = All output REF/N 3 0 TEST_MODE_ENTRY Allows entry into test mode 0 = Normal Operation, 1 = Enter test mode(s) 2 1 I2C_VOUT 1 0 I2C_VOUT 0 1 I2C_VOUT Amplitude configurations differential clocks I2C_VOUT[2:0] 000 = 0.30V 001 = 0.40V 010 = 0.50V 011 = 0.60V 100 = 0.70V 101 = 0.80V (default) 110 = 0.90V 111 = 1.00V Byte 10: Control Register 10 Bit @Pup Name 7 0 RESERVED RESERVED Description 6 0 RESERVED RESERVED 5 0 RESERVED RESERVED ........................Document #: 001-08400 Rev ** Page 7 of 19 SL28774 Byte 10: Control Register 10 (continued) Bit @Pup Name Description 4 0 RESERVED RESERVED 3 0 RESERVED RESERVED 2 0 RESERVED RESERVED 1 1 RESERVED RESERVED 0 1 RESERVED RESERVED Byte 11: Control Register 11 Bit @Pup Name 7 0 RESERVED RESERVED Description 6 0 RESERVED RESERVED 5 0 RESERVED RESERVED 4 0 RESERVED RESERVED 3 0 RESERVED RESERVED 2 1 CPU1_iAMT_EN 1 1 PCI-e_GEN2 PCI-e_Gen2 Compliant 0 = non Gen2, 1= Gen2 Compliant 0 1 RESERVED RESERVED CPU1 iAMT Clock Enabled 0 = Disabled, 1 = Enabled Byte 12: Byte Count Bit @Pup Name 7 0 BC7 6 0 BC6 5 0 BC5 4 0 BC4 3 1 BC3 2 1 BC2 1 1 BC1 0 1 BC0 Description Byte count register for block read operation. The default value for Byte count is 15. In order to read beyond Byte 15, the user should change the byte count limit.to or beyond the byte that is desired to be read. Byte 13: Control Register 13 Bit @Pup Name Description 7 1 REF_Bit2 Drive Strength Control - Bit[2:0], Note: See Byte 6 Bit 5 for REF Slew Rate Bit 1 and 6 1 REF_Bit0 Byte 6 Bit 3 for 27MHz Slew Rate Bit 1 5 1 27MHz_NSS_Bit2 4 1 27MHz_NSS_Bit0 3 1 27MHz_SS_Bit2 2 1 27MHz_SS_Bit0 1 0 RESERVED Normal mode default ‘101’ Wireless Friendly Mode default to ‘111’ RESERVED ........................Document #: 001-08400 Rev ** Page 8 of 19 SL28774 0 0 Wireless Friendly mode Wireless Friendly Mode 0 = Disabled, Default all single-ended clocks slew rate config bits to ‘101’ 1 = Enabled, Default all single-ended clocks slew rate config bits to ‘111’ Byte 14: Control Register 14 Bit @Pup Name Description 7 1 RESERVED RESERVED 6 0 RESERVED RESERVED 5 1 RESERVED RESERVED 4 0 OTP_4 3 0 OTP_3 2 0 OTP_2 1 0 OTP_1 0 0 OTP_0 OTP_ID Identification for programmed device Table 4. Pin 6 and 7 Configuration Table B1b4 B1b3 B1b2 B1b1 Pin7 Pin 8 Spread (%) 0 0 0 0 N/A N/A N/A 0 0 0 1 N/A N/A N/A 0 0 1 0 27M_NSS 27M_SS -0.5% 0 0 1 1 27M_NSS 27M_SS -1% 0 1 0 0 27M_NSS 27M_SS -1.5% 0 1 0 1 27M_NSS 27M_SS -2% 0 1 1 0 27M_NSS 27M_SS -0.75V 0 1 1 1 27M_NSS 27M_SS -1.25% 1 0 0 0 27M_NSS 27M_SS -1.75% 1 0 0 1 27M_NSS 27M_SS +/-0.5% 1 0 1 0 27M_NSS 27M_SS +/-0.75% 1 0 1 1 N/A N/A N/A 1 1 0 0 N/A N/A N/A 1 1 0 1 N/A N/A N/A 1 1 1 0 N/A N/A N/A 1 1 1 1 N/A N/A N/A . . Table 5. Output Driver Status during 27_OE# 27M_SS & 27M_NSS Other single-ended clocks Differential Clocks 27M_OE# Asserted 27M_OE# Deasserted Stoppable Running Running Running Running Running Running Running Running Running SMBus OE Disabled Driven low Driven low Table 6. Output Driver Status All Single-ended Clocks w/o Strap w/ Strap All Differential Clocks Clock ........................Document #: 001-08400 Rev ** Page 9 of 19 Clock# SL28774 Table 6. Output Driver Status Low PD# = 0 (Power down) Hi-z Low Low Table 7. Crystal Recommendations Frequency (Fund) Cut Loading Load Cap Drive (max.) Shunt Cap (max.) Motional (max.) Tolerance (max.) Stability (max.) Aging (max.) 14.31818 MHz AT Parallel 0.1 mW 5 pF 0.016 pF 35 ppm 30 ppm 5 ppm 20 pF The SL28774 requires a Parallel Resonance Crystal. Substituting a series resonance crystal causes the SL28774 to operate at the wrong frequency and violates the ppm specification. For most applications there is a 300-ppm frequency shift between series and parallel crystals due to incorrect loading. Crystal Loading Crystal loading plays a critical role in achieving low ppm performance. To realize low ppm performance, use the total capacitance the crystal sees to calculate the appropriate capacitive loading (CL). Figure 1 shows a typical crystal configuration using the two trim capacitors. It is important that the trim capacitors are in series with the crystal. It is not true that load capacitors are in parallel with the crystal and are approximately equal to the load capacitance of the crystal. Figure 2. Crystal Loading Example , Use the following formulas to calculate the trim capacitor values for Ce1 and Ce2. Load Capacitance (each side) Ce = 2 * CL – (Cs + Ci) Total Capacitance (as seen by the crystal) CLe Figure 1. Crystal Capacitive Clarification = 1 1 ( Ce1 + Cs1 + Ci1 + 1 Ce2 + Cs2 + Ci2 ) CL....................................................Crystal load capacitance CLe......................................... Actual loading seen by crystal Calculating Load Capacitors In addition to the standard external trim capacitors, consider the trace capacitance and pin capacitance to calculate the crystal loading correctly. Again, the capacitance on each side is in series with the crystal. The total capacitance on both side is twice the specified crystal load capacitance (CL). Trim capacitors are calculated to provide equal capacitive loading on both sides. ......................Document #: 001-08400 Rev ** Page 10 of 19 using standard value trim capacitors Ce..................................................... External trim capacitors Cs .............................................. Stray capacitance (terraced) Ci ...........................................................Internal capacitance (lead frame, bond wires, etc.) SL28774 PD# (Power down) Clarification The CKPWRGD/PD# pin is a dual-function pin. During initial power up, the pin functions as CKPWRGD. Once CKPWRGD has been sampled HIGH by the clock chip, the pin assumes PD# functionality. The PD# pin is an asynchronous active LOW input used to shut off all clocks cleanly before shutting off power to the device. This signal is synchronized internally to the device before powering down the clock synthesizer. PD# is also an asynchronous input for powering up the system. When PD# is asserted LOW, clocks are driven to a LOW value and held before turning off the VCOs and the crystal oscillator. PD# (Power down) Assertion When PD# is sampled LOW by two consecutive rising edges of CPU clocks, all single-ended outputs will be held LOW on their next HIGH-to-LOW transition and differential clocks must held LOW. When PD# mode is desired as the initial power on state, PD# must be asserted LOW in less than 10 s after asserting CKPWRGD. PD# Deassertion The power up latency is less than 1.8 ms. This is the time from the deassertion of the PD# pin or the ramping of the power supply until the time that stable clocks are generated from the clock chip. All differential outputs stopped in a three-state condition, resulting from are driven high in less than 300 s of PD# deassertion to a voltage greater than 200 mV. After the clock chip’s internal PLL is powered up and locked, all outputs are enabled within a few clock cycles of each clock. Figure 4 is an example showing the relationship of clocks coming up. Figure 3. Power Down Assertion Timing Waveform Figure 4. Power Down Deassertion Timing Waveform ......................Document #: 001-08400 Rev ** Page 11 of 19 SL28774 Figure 5. CKPWRGD Timing Diagram 27M_OE# Assertion 27M_OE# Deassertion The 27M_OE# signal is an active LOW input used for stopping and starting both 27MHz spread and 27MHz non-spread output clocks while the rest of the clock generator continues to function. When the 27M_OE# pin is asserted, both 27MHz spread and 27MHz non-spread outputs are stopped after they are sampled by two falling edges of the internal 27MHz clock. The final states of the stopped 27MHz spread and 27MHz non-spread signals are LOW. The deassertion of the 27M_OE# signal causes both stopped 27MHz spread and 27MHz non-spread outputs to resume normal operation in a synchronous manner. No short or stretched clock pulses are produced when the clock resumes. The maximum latency from the deassertion to active outputs is no more than two 27MHz clock cycles. 27M H z_O E # 27M H z_SS 27M H z_N S S Figure 6. 27M_OE# Assertion Waveform 27M H z_O E # 27M H z_S S 27M H z_N S S 27M H z_S S In te rn a l 27M H z_S S In te rn a l Figure 7. 27M_OE# Deassertion Waveform ......................Document #: 001-08400 Rev ** Page 12 of 19 SL28774 Absolute Maximum Conditions Parameter Description VDD_3.3V Main Supply Voltage VDD_IO IO Supply Voltage Condition Min. Max. Unit – 4.6 V 3.465 V VIN Input Voltage Relative to VSS –0.5 4.6 VDC TS Temperature, Storage Non-functional –65 150 °C TA Temperature, Operating Ambient Functional -40 85 °C TJ Temperature, Junction Functional – 150 °C ØJC Dissipation, Junction to Case MIL-STD-883E Method 1012.1 – 20 °C/ W ØJA Dissipation, Junction to Ambient JEDEC (JESD 51) – 60 °C/ W ESDHBM ESD Protection (Human Body Model) MIL-STD-883, Method 3015 2000 – V UL-94 Flammability Rating At 1/8 in. MSL Moisture Sensitivity Level V–0 1 Multiple Supplies: The Voltage on any input or I/O pin cannot exceed the power pin during power-up. Power supply sequencing is NOT required. DC Electrical Specifications Parameter Description Min. Max. Unit 3.135 3.465 V 3.3V Input High Voltage (SE) 2.0 VDD + 0.3 V 3.3V Input Low Voltage (SE) VSS – 0.3 0.8 V VDD core 3.3V Operating Voltage VIH VIL Condition 3.3 ± 5% VIHI2C Input High Voltage SDATA, SCLK 2.2 – V VILI2C Input Low Voltage SDATA, SCLK – 1.0 V VIH_FS FS Input High Voltage 0.7 VDD+0.3 V VIL_FS FS Input Low Voltage VSS – 0.3 0.35 V IIH Input High Leakage Current Except internal pull-down resistors, 0 < VIN < VDD – 5 A IIL Input Low Leakage Current Except internal pull-up resistors, 0 < VIN < VDD –5 – A VOH 3.3V Output High Voltage (SE) IOH = –1 mA 2.4 – V VOL 3.3V Output Low Voltage (SE) – 0.4 V IOL = 1 mA VDD IO Low Voltage IO Supply Voltage 1 3.465 V IOZ High-impedance Output Current –10 10 A CIN Input Pin Capacitance 1.5 5 pF COUT Output Pin Capacitance 6 pF LIN Pin Inductance – 7 nH VXIH Xin High Voltage 0.7VDD VDD V VXIL Xin Low Voltage 0 0.3VDD V IDD_PD Power Down Current – 1 mA IDD_3.3V Dynamic Supply Current All outputs enabled. SE clocks with 8” traces. Differential clocks with 7” traces. Loading per CK505 spec. – 65 mA IDD_VDD_IO Dynamic Supply Current All outputs enabled. SE clocks with 8” traces. Differential clocks with 7” traces. Loading per CK505 spec. – 25 mA ......................Document #: 001-08400 Rev ** Page 13 of 19 SL28774 AC Electrical Specifications Parameter Description Condition Min. Max. Unit 47.5 52.5 % 69.841 71.0 ns Crystal TDC XIN Duty Cycle The device operates reliably with input duty cycles up to 30/70 but the REF clock duty cycle will not be within specification TPERIOD XIN Period When XIN is driven from an external clock source TR/TF XIN Rise and Fall Times Measured between 0.3VDD and 0.7VDD – 10.0 ns TCCJ XIN Cycle to Cycle Jitter As an average over 1-s duration – 500 ps TDC CPUT and CPUC Duty Cycle Measured at 0V differential 45 55 % TPERIOD 100 MHz CPUT and CPUC Period Measured at 0V differential at 0.1s 9.99900 10.00100 ns TPERIOD 133 MHz CPUT and CPUC Period Measured at 0V differential at 0.1s 7.49925 7.50075 ns TPERIODSS 100 MHz CPUT and CPUC Period, SSC Measured at 0V differential at 0.1s 10.02406 10.02607 ns TPERIODSS 133 MHz CPUT and CPUC Period, SSC Measured at 0V differential at 0.1s 7.51804 7.51955 ns TPERIODAbs 100 MHz CPUT and CPUC Absolute period Measured at 0V differential at 1 clock 9.91400 10.0860 ns TPERIODAbs 133 MHz CPUT and CPUC Absolute period Measured at 0V differential at 1 clock 7.41425 7.58575 ns TPERIODSSAbs 100 MHz CPUT and CPUC Absolute period, SSC Measured at 0V differential at1 clock 9.914063 10.1362 ns TPERIODSSAbs 133 MHz CPUT and CPUC Absolute period, SSC Measured at 0V differential at1 clock 7.41430 7.62340 ns – 85 ps CPU at 0.7V TCCJ CPU Cycle to Cycle Jitter Measured at 0V differential Skew CPU0 to CPU1 skew Measured at 0V differential – 100 ps LACC Long-term Accuracy Measured at 0V differential – 100 ppm T R / TF CPU Rising/Falling Slew rate Measured differentially from ±150 mV 2.5 8 V/ns TRFM Rise/Fall Matching Measured single-endedly from ±75 mV – 20 % VHIGH Voltage High 1.15 V VLOW Voltage Low –0.3 – V VOX Crossing Point Voltage at 0.7V Swing 300 550 mV SRC at 0.7V TDC SRC Duty Cycle Measured at 0V differential 45 55 % TPERIOD 100 MHz SRC Period Measured at 0V differential at 0.1s 9.99900 10.0010 ns TPERIODSS 100 MHz SRC Period, SSC Measured at 0V differential at 0.1s 10.02406 10.02607 ns TPERIODAbs 100 MHz SRC Absolute Period Measured at 0V differential at 1 clock 9.87400 10.1260 ns Measured at 0V differential at 1 clock 9.87406 10.1762 ns – 3.0 ns – 125 ps TPERIODSSAbs 100 MHz SRC Absolute Period, SSC TSKEW(window) Any SRC Clock Skew from the earliest Measured at 0V differential bank to the latest bank TCCJ SRC Cycle to Cycle Jitter Measured at 0V differential LACC SRC Long Term Accuracy Measured at 0V differential – 100 ppm T R / TF SRC Rising/Falling Slew Rate Measured differentially from ±150 mV 2.5 8 V/ns TRFM Rise/Fall Matching Measured single-endedly from ±75 mV – 20 % VHIGH Voltage High 1.15 V VLOW Voltage Low –0.3 – V VOX Crossing Point Voltage at 0.7V Swing 300 550 mV DOT96 at 0.7V ......................Document #: 001-08400 Rev ** Page 14 of 19 SL28774 AC Electrical Specifications (continued) Parameter Description Condition TDC DOT96 Duty Cycle Measured at 0V differential Min. Max. Unit 45 55 % 10.4177 ns ns TPERIOD DOT96 Period Measured at 0V differential at 0.1s 10.4156 TPERIODAbs DOT96 Absolute Period Measured at 0V differential at 0.1s 10.1656 10.6677 TCCJ DOT96 Cycle to Cycle Jitter Measured at 0V differential at 1 clock – 250 ps LACC DOT96 Long Term Accuracy Measured at 0V differential at 1 clock – 100 ppm T R / TF DOT96 Rising/Falling Slew Rate Measured differentially from ±150 mV 2.5 8 V/ns TRFM Rise/Fall Matching Measured single-endedly from ±75 mV – 20 % VHIGH Voltage High 1.15 V VLOW Voltage Low –0.3 – V VOX Crossing Point Voltage at 0.7V Swing 300 550 mV 27M_NSS/27_SS at 3.3V TDC Duty Cycle Measurement at 1.5V 45 55 % TPERIOD Spread 27M Period Measurement at 1.5V 37.03594 37.03813 ns 37.12986 37.13172 ns 1.0 4.0 V/ns Spread Enabled 27M Period Measurement at 1.5V T R / TF Rising and Falling Edge Rate Measured between 0.8V and 2.0V TCCJ Cycle to Cycle Jitter Measurement at 1.5V – 300 ps LACC 27_M Long Term Accuracy Measured at crossing point VOX – 50 ppm REF TDC REF Duty Cycle Measurement at 1.5V 45 55 % TPERIOD REF Period Measurement at 1.5V 69.82033 69.86224 ns TPERIODAbs REF Absolute Period Measurement at 1.5V 68.83429 70.84826 ns THIGH REF High time Measurement at 2V 29.97543 38.46654 ns TLOW REF Low time Measurement at 0.8V 29.57543 38.26654 ns T R / TF REF Rising and Falling Edge Rate Measured between 0.8V and 2.0V 1.0 4.0 V/ns TSKEW REF Clock to REF Clock Measurement at 1.5V – 500 ps TCCJ REF Cycle to Cycle Jitter Measurement at 1.5V – 1000 ps LACC Long Term Accuracy Measurement at 1.5V – 100 ppm – 1.8 ms 10.0 – ns ENABLE/DISABLE and SET-UP TSTABLE Clock Stabilization from Power-up TSS Stopclock Set-up Time ......................Document #: 001-08400 Rev ** Page 15 of 19 SL28774 Test and Measurement Set-up For Reference Clock The following diagram shows the test load configurations for the single-ended REF output signal. Figure 8. Single-ended REF Triple Load Configuration Figure 9. Single-ended Output Signals (for AC Parameters Measurement) For Differential Clock Signals This diagram shows the test load configuration for the differential clock signals Figure 10. 0.7V Differential Load Configuration ......................Document #: 001-08400 Rev ** Page 16 of 19 SL28774 Figure 11. Differential Measurement for Differential Output Signals (for AC Parameters Measurement) Figure 12. Single-ended Measurement for Differential Output Signals (for AC Parameters Measurement) ......................Document #: 001-08400 Rev ** Page 17 of 19 SL28774 Ordering Information Part Number Package Type Product Flow Lead-free SL28774ELI 32-pin QFN Industrial, -40 to 85C SL28774ELIT 32-pin QFN–Tape and Reel Industrial, -40 to 85C SL 28 774 EL I - T Packaging Designator for Tape and Reel Temperature Designator Package Designator L : QFN Revision Number A = 1st Silicon Generic Part Number Designated Family Number Company Initials This device is Pb free and RoHS compliant. Package Diagrams 32-Lead QFN 5x 5mm (Saw Version) ......................Document #: 001-08400 Rev ** Page 18 of 19 SL28774 Document History Page Document Title: SL28774 PC EProClock® Generator for Intel Calpella Chipset REV. Issue Date Orig. of Change 1.0 07/22/08 JMA 1.1 09/08/09 JMA Removed Preliminary 1.2 10/02/09 JMA Updated note in package diagram 1.3 01/05/10 JMA 1. Added Note in package diagram 2. Updated text content 3. Added information on trace length in Figure 8 4. Removed CPU Driven Figures 5. Updated VDD_IO spec to 3.465 maximum value 6. Edited CK_PWRGD to CKPWRGD Description of Change Initial Release The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice. Silicon Laboratories assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences resulting from the use of information included herein. Additionally, Silicon Laboratories assumes no responsibility for the functioning of undescribed features or parameters. Silicon Laboratories reserves the right to make changes without further notice. Silicon Laboratories makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Silicon Laboratories 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 consequential or incidental damages. Silicon Laboratories products are not designed, intended, or authorized for use in applications intended to support or sustain life, or for any other application in which the failure of the Silicon Laboratories product could create a situation where personal injury or death may occur. Should Buyer purchase or use Silicon Laboratories products for any such unintended or unauthorized application, Buyer shall indemnify and hold Silicon Laboratories harmless against all claims and damages. ......................Document #: 001-08400 Rev ** Page 19 of 19