IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR DESCRIPTION: FEATURES: IDTCV125 is a 56 pin clock device, incorporating both Intel CK410M and CKSSCD requirements, for Intel advance P4 processors. The CPU output buffer is designed to support up to 400MHz processor. This chip has four PLLs inside for CPU, SRC/PCI, LVDS, and 48MHz/DOT96 IO clocks. This device also implements Band-gap referenced IREF to reduce the impact of VDD variation on differential outputs, which can provide more robust system performance. Static PLL frequency divide error can be as low as 36 ppm, worse case 114 ppm, providing high accuracy output clock. Each CPU/SRC/LVDS has its own Spread Spectrum selection. • Power management control suitable for notebook applications • One high precision PLL for CPU, SSC and N programming • One high precision PLL for SRC/PCI, supports 100MHz output frequency, SSC and N programming • One high precision PLL for LVDS. Supports 100/96MHz output frequency, SSC programming • One high precision PLL for 96MHz/48MHz • Band-gap circuit for differential outputs • Support spread spectrum modulation, –0.5 down spread and others • Support SMBus block read/write, index read/write • Selectable output strength for REF • Allows for CPU frequency to change to a slower frequency to conserve power when an application is less executionintensive • Smooth transition for N programming • Available in TSSOP package OUTPUTS: • • • • • • • KEY SPECIFICATION: • • • • IDTCV125 2*0.7V current –mode differential CPU CLK pair 6*0.7V current –mode differential SRC CLK pair One CPU_ITP/SRC selectable CLK pair 6*PCI, 2 free running, 33.3MHz 1*96MHz, 1*48MHz 1*REF One 100/96 MHz differential LVDS CPU/SRC CLK cycle to cycle jitter < 85ps PCI CLK cycle to cycle jitter < 250ps Static PLL frequency divide error < 114 ppm Static PLL frequency divide error for 48MHz < 5 ppm FUNCTIONAL BLOCK DIAGRAM PLL1 SSC N Programmable X1 CPU CLK Output Buffer Stop Logic CPU[1:0] CPU_ITP/SRC7 XTAL Osc Amp IREF REF X2 SDATA SCLK LVDS CLK Output Buffer Stop Logic PLL2 SSC SM Bus Controller ITP_EN LVDS IREF PLL3 SSC N Programmable SRC CLK Output Buffer Stop Logic SRC[6:1] VTT_PWRGD#/PD SEL100/96# SEL 100/96MHz PCI[3:0], PCIF[1:0] IREF FSA.B.C PCI_STOP# Control Logic CPU_STOP# 48MHz 48MHz/96MHz Output BUffer PLL4 DOT96 The IDT logo is a registered trademark of Integrated Device Technology, Inc. COMMERCIAL TEMPERATURE RANGE DECEMBER 2004 1 © 2004 Integrated Device Technology, Inc. DSC 6552/14 IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE ABSOLUTE MAXIMUM RATINGS(1) PIN CONFIGURATION Symbol Description Min VDD_PCI 1 56 PCI0 VDDA 3.3V Core Supply Voltage VSS_PCI 2 55 PCI_STOP# VDDIN 3.3V Logic Input Supply Voltage GND - 0.5 PCI1 3 54 CPU_STOP# TSTG Storage Temperature PCI2 4 53 FSC/TEST_SEL 5 TAMBIENT Ambient Operating Temperature PCI3 52 REF VSS_PCI 6 TCASE Case Temperature 51 VSS_REF VDD_PCI 7 ESD Prot Input ESD Protection 50 XTAL_IN PCIF0/ITP_EN 8 49 XTAL_OUT PCIF1/SEL100/96# 9 48 VDD_REF VTT_PWRGD#/PD 10 47 SDA VDD48 11 46 SCL USB48/FSA 12 45 VSS_CPU VSS48 13 44 CPU0 DOT96 14 43 CPU0# DOT96# 15 42 VDD_CPU FSB/TEST_MODE 16 41 CPU1 LVDS 17 40 CPU1# LVDS# 18 39 IREF SRC1 19 38 VSSA SRC1# 20 37 VDDA VDD_SRC 21 36 CPU2_ITP/SRC7 SRC2 22 35 CPU2_ITP#/SRC7# SRC2# 23 34 VDD_SRC SRC3 24 33 SRC6 SRC3# 25 32 SRC6# SRC4 26 31 SRC5 SRC4# 27 30 SRC5# VDD_SRC 28 29 VSS_SRC (1) (2) (2) –65 0 2000 Max Unit 4.6 V 4.6 V +150 °C +70 °C +115 °C V Human Body Model NOTE: 1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. NOTES: 1. 130K internal pull-up resistor. 2. Can be configured as 100MHz or 96MHz output clock, depending on pin9 power on pull-up (100MHz) or pull-down (96MHz) latch. If using internal pull-up resistor, power on would be 100MHz. TSSOP TOP VIEW FREQUENCY SELECTION TABLE FSC, B, A CPU SRC[7:0] PCI USB DOT REF 101 100 100 33.3 48 96 14.318 001 133 100 33.3 48 96 14.318 011 166 100 33.3 48 96 14.318 010 200 100 33.3 48 96 14.318 000 266 100 33.3 48 96 14.318 100 333 100 33.3 48 96 14.318 110 400 100 33.3 48 96 14.318 111 Reserve 100 33.3 48 96 14.318 2 IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE PIN DESCRIPTION Pin Number Name Type Description 1 VDD_PCI PWR 3.3V 2 VSS_PCI GND GND 3 PCI1 OUT PCI clock 4 PCI2 OUT PCI clock 5 PCI3 OUT PCI clock 6 VSS_PCI GND GND 7 VDD_PCI PWR 3.3V 8 PCIF0/ITP_EN I/O PCI clock, free running. CPU2 select (sampled on VTT_PWRGD# assertion) HIGH = CPU2. 9 PCIF1/SEL100/96# I/O PCI clock, free running. SEL100/96MHz (sampled on VTT_PWRGD# assertion) HIGH, LVDS = 100MHz. 10 VTT_PWRGD#/PD IN Level-sensitive strobe used to latch the FSA, FSB, FSC/TEST_SEL, and PCIF0/ITP_EN inputs. After VTT_PWRGD# assertion, becomes a real-time input for asserting power down. (Active HIGH). Latch PCIF1/ SEL100/96# input. 11 VDD48 PWR 12 USB48/FSA I/O 13 VSS48 GND GND 3.3V 48MHz clock/FSA for CPU frequency selection 14 DOT96 OUT 96MHz 0.7 current mode differential clock output 15 DOT96# OUT 96MHz 0.7 current mode differential clock output 16 FSB/TEST_MODE IN CPU frequency selection. Selects REF/N or Hi-Z when in test mode, Hi-Z = 1, REF/N = 0. 17 LVDS OUT Differential serial reference clock 18 LVDS# OUT Differential serial reference clock 19 SRC1 OUT Differential serial reference clock 20 SRC1# OUT Differential serial reference clock 21 VDD_SRC PWR 3.3V 22 SRC2 OUT Differential serial reference clock 23 SRC2# OUT Differential serial reference clock 24 SRC3 OUT Differential serial reference clock 25 SRC3# OUT Differential serial reference clock 26 SRC4 OUT Differential serial reference clock 27 SRC4# OUT Differential serial reference clock 28 VDD_SRC PWR 3.3V 29 VSS_SRC GND GND 30 SRC5# OUT Differential serial reference clock 31 SRC5 OUT Differential serial reference clock 32 SRC6# OUT Differential serial reference clock 33 SRC6 OUT Differential serial reference clock 34 VDD_SRC PWR 3.3V 35 CPU2_ITP#/SRC7# OUT Selectable CPU or SRC differential clock output. ITP_EN = 0 at VTT_PWRGD# assertion = SRC7#. 36 CPU2_ITP/SRC7 OUT Selectable CPU or SRC differential clock output. ITP_EN = 0 at VTT_PWRGD# assertion = SRC7. 37 VDDA PWR 3.3V 38 VSSA GND GND 39 IREF OUT Reference current for differential output buffer 40 CPU1# OUT Host 0.7 current mode differential clock output 41 CPU1 OUT Host 0.7 current mode differential clock output 42 VDD_CPU PWR 3.3V 3 IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE PIN DESCRIPTION (CONT.) Pin Number Name Type 43 CPU0# OUT Host 0.7 current mode differential clock output Description 44 CPU0 OUT Host 0.7 current mode differential clock output 45 VSS_CPU GND 46 SCL IN GND SM bus clock 47 SDA I/O 48 VDD_REF PWR 3.3V SM bus data 49 XTAL_OUT OUT XTAL output 50 XTAL_IN IN 51 VSS_REF GND XTAL input 52 REF OUT 53 FSC/TEST_SEL IN CPU frequency selection. Selects test mode if pulled above 2V when VTT_PWRGD# is asserted LOW. 54 CPU_STOP# IN Stop all stoppable CPU CLK 55 PCI_STOP# IN Stop all stoppable PCI, SRC CLK 56 PCI0 OUT GND 14.318 MHz reference clock output PCI clock INDEX BLOCK WRITE PROTOCOL Bit 1 2-9 10 11-18 19 20-27 28 29-36 37 38-45 46 # of bits 1 8 1 8 1 8 1 8 1 8 1 From Master Master Slave Master Slave Master Slave Master Slave Master Slave Master Slave Master INDEX BLOCK READ PROTOCOL Master can stop reading any time by issuing the stop bit without waiting until Nth byte (byte count bit30-37). Description Start D2h Ack (Acknowledge) Register offset byte (starting byte) Ack (Acknowledge) Byte count, N (0 is not valid) Ack (Acknowledge) first data byte (Offset data byte) Ack (Acknowledge) 2nd data byte Ack (Acknowledge) : Nth data byte Acknowledge Stop Bit 1 2-9 10 11-18 19 20 21-28 29 30-37 # of bits 1 8 1 8 1 1 8 1 8 From Master Master Slave Master Slave Master Master Slave Slave 38 39-46 47 48-55 1 8 1 8 Master Slave Master Slave Master Slave Master INDEX BYTE READ INDEX BYTE WRITE Description Start D2h Ack (Acknowledge) Register offset byte (starting byte) Ack (Acknowledge) Repeated Start D3h Ack (Acknowledge) Byte count, N (block read back of N bytes), power on is 8 Ack (Acknowledge) first data byte (Offset data byte) Ack (Acknowledge) 2nd data byte Ack (Acknowledge) : Ack (Acknowledge) Nth data byte Not acknowledge Stop Setting bit[11:18] = starting address. After reading back the first data byte, master issues Stop bit. Setting bit[11:18] = starting address, bit[20:27] = 01h. 4 IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE RESOLUTION SSC MAGNITUDE CONTROL FOR CPU, SRC, AND SMC SMC[2:0] 000 001 010 011 100 101 110 111 CPU (MHz) 100 133 166 200 266 333 400 -0.25 -0.5 -0.75 -1 ±0.125 ±0.25 ±0.375 ±0.5 Resolution 0.666667 0.666667 1.333333 1.333333 1.333333 2.666667 2.666667 N= 150 200 125 150 200 125 150 SPREAD SPECTRUM CONTROL SELECTION (SSC) FOR LVDS SEL 100/96# CONFIGURATION SEL 100/96# LVDS Frequency Unit 0 96 MHz S[3:0] Spread MHz 0000 -0.8% 0001 -1% 0010 -1.25% 0011 -1.5% 0100 -1.75% 0101 -2% 0110 -0.3% 1 100 S.E. CLOCK STRENGTH SELECTION (PCI, REF, USB48) Str[1:0] Level 0111 -0.5% 00 1 1000 ±0.3% 01 0.8 1001 ±0.4% 10 0.6 1010 ±0.5% 11 1.2 1011 ±0.6% 1100 ±0.8% 1101 ±1% 1110 ±1.25% 1111 ±1.5% 5 IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE CONTROL REGISTERS N PROGRAMMING PROCEDURE Use Index byte write. For N programming, the user only needs to access Byte 11, Byte 12, and Byte 9. • • 1. 2. 3. Write Byte 11 for CPU PLL N, CPU f = N* Resolution (see resolution table). Write Byte 12 for SRC PLL N, SRC f = N*0.666667, PCI = SRC f /3. Enable N Programming bit, Byte 9 bit 1. Once this bit is enabled, any N value will be changed on the fly. BYTE 0 Bit Output(s) Affected Description/Function 0 1 Type Power On 0 Reserved 1 SRC1, SRC1# Output Enable Tristate Enable RW 1 2 SRC2, SRC2# Output Enable Tristate Enable RW 1 3 SRC3, SRC3# Output Enable Tristate Enable RW 1 4 SRC4, SRC4# Output Enable Tristate Enable RW 1 5 SRC5, SRC5# Output Enable Tristate Enable RW 1 6 SRC6, SRC6# Output Enable Tristate Enable RW 1 7 CPU2, CPU2#/ Output Enable Tristate Enable RW 1 SRC7, SRC7# BYTE 1 Bit Output(s) Affected Description/Function 0 1 Type Power On 0 CPU[2:0], SRC[7:1], Spread Spectrum mode enable Spread off Spread on RW 0 PCI[5:0], PCIF[1:0] 1 CPU0, CPU0# Output Enable Tristate Enable RW 1 2 CPU1, CPU1# Output Enable Tristate Enable RW 1 3 Reserved RW 0 4 REF Output Enable Tristate Enable RW 1 5 USB48 Output Enable Tristate Enable RW 1 6 DOT96 Output Enable Tristate Enable RW 1 7 PCIF0 Output Enable Tristate Enable RW 1 Bit Output(s) Affected Description/Function 0 1 Type Power On 0 PCIF1 Output Enable Tristate Enable RW 1 1 Reserved RW 1 2 PCI0 Output Enable Tristate Enable RW 1 3 PCI1 Output Enable Tristate Enable RW 1 4 PCI2 Output Enable Tristate Enable RW 1 5 PCI3 Output Enable Tristate Enable RW 1 6 Reserved RW 1 7 Reserved RW 1 BYTE 2 6 IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE BYTE 3 Bit Output(s) Affected 0 1 2 3 4 5 6 7 Reserved SRC1 SRC2 SRC3 SRC4 SRC5 SRC6 SRC7 Description / Function Allow controlled by PCI_STOP# assertion Bit Output(s) Affected 0 0 1 Type Power On Free running, not affected by PCI_STOP# Stopped with PCI_STOP# RW RW RW RW RW RW RW RW 0 0 0 0 0 0 0 0 Description / Function 0 1 Type Power On CPU0, CPU0# Allow control of CPU0 with assertion of CPU_STOP# Not stopped by CPU_STOP# Stopped with CPU_STOP# RW 1 1 CPU1, CPU1# Allow control of CPU1 with assertion of CPU_STOP# Not stopped by CPU_STOP# Stopped with CPU_STOP# RW 1 2 CPU2, CPU2# Allow control of CPU2 with assertion of CPU_STOP# Not stopped by CPU_STOP# Stopped with CPU_STOP# RW 1 BYTE 4 3 PCIF0 Allow controlled by Not stopped Stopped with RW 0 4 PCIF1 PCI_STOP# assertion by PCI_STOP# PCI_STOP# RW 0 5 Reserved RW 0 RW 0 RW 0 6 DOT96 7 Reserved DOT96 power down drive mode Driven in power down Tristate BYTE 5 Bit Output(s) Affected Description / Function 0 1 Type Power On 0 CPU0, CPU0# CPU0 PD drive mode Driven in power down Tristate in power down RW 0 1 CPU1, CPU1# CPU1 PD drive mode Driven in power down Tristate in power down RW 0 2 CPU2, CPU2# CPU2 PD drive mode Driven in power down Tristate in power down RW 0 3 SRC[7:1], SRC[7:1]# SRC PD drive mode Driven in power down Tristate in power down RW 0 4 CPU0, CPU0# CPU0 CPU_STOP drive mode Driven in CPU_STOP# Tristate when stopped RW 0 5 CPU1, CPU1# CPU1 CPU_STOP drive mode Driven in CPU_STOP# Tristate when stopped RW 0 6 CPU2, CPU2# CPU2 CPU_STOP drive mode Driven in CPU_STOP# Tristate when stopped RW 0 7 SRC[7:1], SRC[7:1]# SRC PCI_STOP drive mode Driven in PCI_STOP Tristate when stopped RW 0 7 IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE BYTE 6 Bit Output(s) Affected Description / Function 0 CPU[2:0] FSA latched value on power up R 1 CPU[2:0] FSB latched value on power up R 2 CPU[2:0] FSC latched value on power up 3 PCI, SRC Software PCI_STOP control for PCI and SRC CLK Stop all PCI, PCIF, and SRC which can be stopped by PCI_STOP# Software STOP Disabled RW 1 4 REF REF drive strength 1x drive 2x drive RW 1 5 Reserved RW 0 Test clock mode entry control Normal operation Test mode, controlled by Byte 6, Bit 7 RW 0 CPU, SRC, PCI PCIF, REF, USB48, DOT96 Only valid when Byte 6, Bit 6 is HIGH Hi-Z REF/N RW 0 Output(s) Affected Description / Function 0 1 6 7 0 1 Type Power On R BYTE 7 Bit Type Power On 0 Vendor ID R 1 1 Vendor ID R 0 2 Vendor ID R 1 3 Vendor ID R 0 4 Revision ID R 0 5 Revision ID R 0 6 Revision ID R 0 7 Revision ID R 0 BYTE 8, LVDS CONTROL BYTE Bit Output(s) Affected Description/Function 0 1 Type Power On 0 LVDS HW/ SMBus control HW(1) SW RW 0 1 LVDS SSC EN Spread spectrum enable Off On RW 1 2 LVDS Enable Output Enable Disable Enable RW 1 3 SEL 100/96# Select LVDS frequency 96MHz 100MHZ RW SEL 100/96# 4 S3 see SSC table RW 0 5 S2 see SSC table RW 0 6 S1 see SSC table RW 0 7 S0 see SSC table RW 0 NOTE: 1. If bit 0 is set to 0, LVDS output frequency is selected by HW SEL 100/96#. If bit 0 is set to 1, LVDS output frequency is selected by bit 3. 8 IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE BYTE 9 Bit Output(s) Affected 0 1 2 3 4 5 6 7 One cycle read Description / Function 0 1 Type Power On N Programming enable LVDS PLL power down disable Disable normal enable enable Power down SRC, PLL2, SSC enable USB PLL power down SRC PLL power down CPU PLL power down Only valid when Byte1 bit0 is 1 normal normal normal disable Power down Power down Power down enable RW RW RW RW RW RW RW RW 0 0 0 0 0 0 0 1 Bit Output(s) Affected Description / Function 0 1 Type Power On 0 1 2 3 4 5 6 7 SRC SMC0 SRC SMC1 SRC SMC2 Reserved CPU SMC0 CPU SMC1 CPU SMC2 Reserved SRC/PCI SSC control see SMC table RW RW RW RW RW RW RW RW 1 0 0 0 1 0 0 0 Type Power On RW RW RW RW RW RW RW RW 0 1 1 0 1 0 0 1 Type Power On RW RW RW RW RW RW RW RW 0 1 1 0 1 0 0 1 BYTE 10 CPU PLL SSC control see SMC table BYTE 11 Bit Output(s) Affected Description / Function 0 1 2 3 4 5 6 7 CPU_N0, LSB CPU_N1 CPU_N2 CPU_N3 CPU_N4 CPU_N5 CPU_N6 CPU_N7, MSB CPU CLK = N* Resolution see Resolution table Bit Output(s) Affected Description / Function 0 1 2 3 4 5 6 7 SRC_N0, LSB SRC_N1 SRC_N2 SRC_N3 SRC_N4 SRC_N5 SRC_N6 SRC_N7, MSB 0 1 BYTE 12 0 SRC f = N*SRC Resolution Resolution = 0.666667 100MHz N= 150 9 1 IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE BYTE 13 Bit Output(s) Affected 0 1 2 3 4 5 6 7 48MHzStr0 48MHStr1 REFStr0 REFStr1 PCIStrC0 PCIStrC1 PCIFStr0 PCIFStr1 Description / Function 0 1 USB48MHz0 strength selection REF strength selection PCI strength selection PCIF strength selection Type Power On RW RW RW RW RW RW RW RW 0 0 0 0 0 0 0 0 ELECTRICAL CHARACTERISTICS - INPUT / SUPPLY / COMMON OUTPUT PARAMETERS Following Conditions Apply Unless Otherwise Specified: Operating Condition: TA = 0°C to +70°C, Supply Voltage: VDD = 3.3V ± 5% Symbol Parameter Test Conditions Min. Typ. Max. Unit VIH Input HIGH Voltage 3.3V ± 5% 2 — VDD + 0.3 V VIL Input LOW Voltage 3.3V ± 5% VSS - 0.3 — 0.8 V VIH_FS LOW Voltage, HIGH Threshold For FSA.B.C test_mode 0.7 — VDD + 0.3 V VIL_FS LOW Voltage, LOW Threshold For FSA.B.C test_mode VSS - 0.3 — 0.35 V IIH Input HIGH Current VIN = VDD –5 — 5 µA IIL1 Input LOW Current VIN = 0V, inputs with no pull-up resistors –5 — — µA IIL2 Input LOW Current VIN = 0V, inputs with pull-up resistors –200 — — µA IDD3.3OP Operating Supply Current Full active, CL = full load — — 400 mA IDD3.3PD Powerdown Current All differential pairs driven — — 70 mA All differential pairs tri-stated — — 12 VDD = 3.3V — 14.31818 — MHz — — 7 nH Logic inputs Output pin capacitance — — — — 5 6 pF XTAL_IN — — 5 FI Input Frequency(1) LPIN Pin Inductance(2) CIN COUT Input Capacitance(2) CINX COUTX TSTAB XTAL_OUT — — 12 Clock Stabilization(2,3) From VDD power-up or de-assertion of PD to first clock — — 1.8 ms Modulation Frequency(2) Triangular modulation 30 — 33 KHz TDRIVE_SRC(2) SRC output enable after PCI_STOP# de-assertion — — 15 ns TDRIVE_PD(2) CPU output enable after PD de-assertion — — 300 us TFALL_PD(2) Fall time of PD — — 5 ns TRISE_PD(3) Rise time of PD — — 5 ns TDRIVE_CPU_STOP#(2) CPU output enable after CPU_STOP# de-assertion — — 10 us TFALL_CPU_STOP#(2) Fall time of CPU_STOP# — — 5 ns TRISE_CPU_STOP#(3) Rise time of CPU_STOP# — — 5 ns NOTES: 1. Input frequency should be measured at the REF output pin and tuned to ideal 14.31818MHz to meet ppm frequency accuracy on PLL outputs. 2. This parameter is guaranteed by design, but not 100% production tested. 3. See TIMING DIAGRAMS for timing requirements. 10 IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE ELECTRICAL CHARACTERISTICS - CPU, SRC, AND DOT96 0.7 CURRENT MODE DIFFERENTIAL PAIR(1) Following Conditions Apply Unless Otherwise Specified: Operating Condition: TA = 0°C to +70°C, Supply Voltage: VDD = 3.3V ± 5%; CL = 2pF Symbol Parameter Min. Typ. Max. Unit VO = VX 3000 — — Ω Output HIGH Voltage IOH = -1mA 2.4 — — V VOL3 Output LOW Voltage IOL = 1mA — — 0.4 V VHIGH Voltage HIGH(2) Statistical measurement on single-ended signal using 660 — 1150 mV VLOW Voltage LOW(2) oscilloscope math function –300 — 150 VOVS Max Voltage(2) Measurement on single-ended signal using absolute value — — 1150 VUDS Min Voltage(2) –300 — — VCROSS(ABS) Crossing Voltage (abs)(2) 250 — 550 mV d - VCROSS Crossing Voltage (var)(2) Variation of crossing over all edges — — 140 mV Long Accuracy(2,3) See TPERIOD Min. - Max. values –300 — 300 ppm 400MHz nominal / -0.5% spread 2.4993 — 2.5133 333.33MHz nominal / -0.5% spread 2.9991 — 3.016 266.66MHz nominal / -0.5% spread 3.7489 — 3.77 200MHz nominal / -0.5% spread 4.9985 — 5.0266 166.66MHz nominal / -0.5% spread 5.9982 — 6.032 133.33MHz nominal / -0.5% spread 7.4978 — 7.54 100MHz nominal / -0.5% spread 9.997 — 10.0533 96MHz nominal 10.4135 — 10.4198 400MHz nominal / -0.5% spread 2.4143 — — 333.33MHz nominal / -0.5% spread 2.9141 — — 266.66MHz nominal / -0.5% spread 3.6639 — — 200MHz nominal / -0.5% spread 166.66MHz nominal / -0.5% spread 4.9135 5.9132 — — — — 133.33MHz nominal / -0.5% spread 7.4128 — — 100MHz nominal / -0.5% spread 9.912 — — Current Source Output Impedance(2) VOH3 ZO ppm TPERIOD TABSMIN Average Period(3) Absolute Min Period(2,3) Test Conditions 96MHz nominal mV ns ns 10.1635 — — tR Rise Time(2) VOL = 0.175V, VOH = 0.525V 175 — 700 ps tF Fall Time(2) VOL = 0.175V, VOH = 0.525V 175 — 700 ps d-tR Rise Time Variation(2) — — 125 ps d-tF Fall Time Variation(2) — — 125 ps dT3 Cycle(2) 45 — 55 % Duty Measurement from differential waveform NOTES: 1. SRC clock outputs run only at 100MHz. 2. This parameter is guaranteed by design, but not 100% production tested. 3. All long term accuracy and clock period specifications are guaranteed with the assumption that the REF output is at 14.31818MHz. 11 IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE ELECTRICAL CHARACTERISTICS - CPU, SRC, AND DOT96 0.7 CURRENT MODE DIFFERENTIAL PAIR, CONTINUED(1) Following Conditions Apply Unless Otherwise Specified: Operating Condition: TA = 0°C to +70°C, Supply Voltage: VDD = 3.3V ± 5%; CL = 2pF Symbol tSK3 tJCYC-CYC Parameter Skew, CPU[1:0](2) Skew, CPU2(2) Test Conditions Min. — — Typ. — — Max. 100 250 Skew, SRC(2) — — 250 Jitter, Cycle to Cycle, CPU[1:0](2) — — 85 — — 100 — — — — 125 250 VT = 50% Jitter, Cycle to Cycle, CPU2(2) Measurement from differential waveform SRC(2) Jitter, Cycle to Cycle, Jitter, Cycle to Cycle, DOT96(2) Unit ps ps NOTES: 1. SRC clock outputs run only at 100MHz. 2. This parameter is guaranteed by design, but not 100% production tested. ELECTRICAL CHARACTERISTICS - PCICLK / PCICLK_F Following Conditions Apply Unless Otherwise Specified: Operating Condition: TA = 0°C to +70°C, Supply Voltage: VDD = 3.3V ± 5%; CL = 10 - 30pF Symbol Parameter Test Conditions ppm Static Error(1,2) Min. Typ. Max. Unit See Tperiod Min. - Max. values TPERIOD Clock Period(2) — — 0 ppm 33.33MHz output nominal 29.991 — 30.009 ns 33.33MHz output spread 29.991 — 30.1598 VOH Output HIGH Voltage IOH = -1mA 2.4 — — V VOL Output LOW Voltage IOL = 1mA — — 0.55 V IOH Output HIGH Current VOH at Min. = 1V -33 — — mA VOH at Max. = 3.135V — — -33 VOL at Min. = 1.95V 30 — — IOL Output LOW Current mA VOL at Max. = 0.4V — — 38 Edge Rate(1) Rising edge rate 1 — 4 V/ns Edge Rate(1) Falling edge rate 1 — 4 V/ns tR1 Rise Time(1) VOL = 0.8V, VOH = 2V 0.3 — 1.2 ns tF1 Fall Time(1) VOL = 0.8V, VOH = 2V 0.3 — 1.2 ns Cycle(1) dT1 Duty VT = 1.5V 45 — 55 % tSK1 Skew(1) VT = 1.5V — — 500 ps Jitter, Cycle to Cycle(1) VT = 1.5V — — 500 ps tJCYC-CYC NOTES: 1. This parameter is guaranteed by design, but not 100% production tested. 2. All long term accuracy and clock period specifications are guaranteed with the assumption that the REF output is at 14.31818MHz. 12 IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE ELECTRICAL CHARACTERISTICS, 48MHZ, USB Following Conditions Apply Unless Otherwise Specified: Operating Condition: TA = 0°C to +70°C, Supply Voltage: VDD = 3.3V ± 5%; CL = 10 - 20pF Symbol Parameter Test Conditions ppm Static Error(1,2) See Tperiod Min. - Max. values TPERIOD Clock Period(2) 48MHz output nominal VOH Output HIGH Voltage VOL IOH IOL Min. Typ. Max. Unit — — 0 ppm 20.8257 — 20.834 ns IOH = -1mA 2.4 — — V Output LOW Voltage IOL = 1mA — — 0.55 V Output HIGH Current VOH at Min. = 1V -29 — — mA VOH at Max. = 3.135V — — -23 VOL at Min. = 1.95V 29 — — Output LOW Current mA VOL at Max. = 0.4V — — 27 Edge Rate(1) Rising edge rate 1 — 2 V/ns Edge Rate(1) Falling edge rate 1 — 2 V/ns tR1 Rise Time(1) VOL = 0.8V, VOH = 2V 0.5 — 1.2 ns tF1 Fall Time(1) VOL = 0.8V, VOH = 2V 0.5 — 1.2 ns VT = 1.5V 45 — 55 % — — 350 ps Min. Typ. Max. Unit — — 0 ppm 69.827 — 69.855 ns dT1 tJCYC-CYC Duty Cycle(1) Jitter, Cycle to Cycle NOTES: 1. This parameter is guaranteed by design, but not 100% production tested. 2. All long term accuracy and clock period specifications are guaranteed with the assumption that the REF output is at 14.31818MHz. ELECTRICAL CHARACTERISTICS - REF-14.318MHZ Following Conditions Apply Unless Otherwise Specified: Operating Condition: TA = 0°C to +70°C, Supply Voltage: VDD = 3.3V ± 5%; CL = 10 - 20pF Symbol Parameter Test Conditions Long Accuracy(1) See Tperiod Min. - Max. values Clock Period 14.318MHz output nominal VOH Output HIGH Voltage(1) IOH = -1mA 2.4 — — V VOL Output LOW Voltage(1) IOL = 1mA — — 0.4 V IOH Output HIGH Current VOH at Min. = 1V -33 — — mA VOH at Max. = 3.135V — — -33 VOL at Min. = 1.95V 30 — — ppm TPERIOD IOL Output LOW Current mA VOL at Max. = 0.4V — — 38 Edge Rate(1) Rising edge rate 1 — 4 V/ns Edge Rate(1) Falling edge rate 1 — 4 V/ns tR1 Rise Time(1) VOL = 0.8V, VOH = 2V 0.3 — 1.2 ns tF1 Fall Time(1) VOL = 0.8V, VOH = 2V 0.3 — 1.2 ns dT1 Duty Cycle(1) VT = 1.5V 45 — 55 % Jitter, Cycle to Cycle(1) VT = 1.5V — — 1000 ps tJCYC-CYC NOTE: 1. This parameter is guaranteed by design, but not 100% production tested. 13 IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE PCI STOP FUNCTIONALITY The PCI_STOP# signal is on an active low input controlling PCI and SRC outputs. If PCIF[1:0] and SRC clocks can be set to be free-running through SMBus programming, they will ignore both the PCI_STOP# pin and the PCI_STOP register bit. PCI_STOP# CPU CPU# SRC SRC# PCIF/PCI USB DOT96 DOT96# REF 1 Normal Normal Normal Normal 33MHz 48MHz Normal Normal 14.318MHz 0 Normal Normal IREF * 6 or float Low Low 48MHz Normal Normal 14.318MHz PCI_STOP# ASSERTION (TRANSITION FROM ‘1’ TO ‘0’) The clock samples the PCI_STOP# signal on a rising edge of PCIF clock. After detecting the PCI_STOP# assertion low, all PCI[6:0] and stoppable PCIF[1:0] clocks will latch low on their next high to low transition. After the PCI clocks are latched low, the SRC clock, (if set to stoppable) will latch high at IREF * 6 (or tristate if Byte 2 Bit 6 = 1) upon its next low to high transition and the SRC# will latch low as shown below. tSU PCI_STOP# PCIF[1:0] 33MHz PCI[3:0] 33MHz SRC 100MHz SRC# 100MHz PCI_STOP# - DE-ASSERTION The de-assertion of the PCI_STOP# signal is to be sampled on the rising edge of the PCIF free running clock domain. After detecting PCI_STOP# de-assertion, all PCI[6:0], stoppable PCIF[1:0] and stoppable SRC clocks will resume in a glitch free manner. tSU tDRIVE_SRC PCI_STOP# PCIF[1:0] 33MHz PCI[3:0] 33MHz SRC 100MHz SRC# 100MHz 14 IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE CPU STOP FUNCTIONALITY The CPU_STOP# signal is an active low input controlling the CPU outputs. This signal can be asserted asynchronously. CPU_STOP# CPU CPU# SRC SRC# PCIF/PCI USB DOT96 DOT96# REF 1 Normal Normal Normal Normal 33MHz 48MHz Normal Normal 14.318MHz 0 IREF * 6 or float Low Normal Normal 33MHz 48MHz Normal Normal 14.318MHz CPU_STOP# ASSERTION (TRANSITION FROM ‘1’ TO ‘0’) Asserting CPU_STOP# pin stops all CPU outputs that are set to be stoppable after their next transition. When the SMBus CPU_STOP tri-state bit corresponding to the CPU output of interest is programmed to a ‘0’, CPU output will stop CPU_True = High and CPU_Complement = Low. When the SMBus CPU_STOP# tri-state bit corresponding to the CPU output of interest is programmed to a ‘1’, CPU outputs will be tri-stated. CPU_STOP# CPU CPU# CPU_STOP# - DE-ASSERTION (TRANSITION FROM ‘0’ TO ‘1’) With the de-assertion of CPU_STOP# all stopped CPU outputs will resume without a glitch. The maximum latency from the de-assertion to active outputs is two to six CPU clock periods. If the control register tristate bit corresponding to the output of interest is programmed to ‘1’, then the stopped CPU outputs will be driven High within 10nS of CPU_STOP# de-assertion to a voltage greater than 200mV. CPU_STOP# CPU CPU# CPU Internal tDRIVE_CPU_Stop 10nS > 200mV 15 IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE PD, POWER DOWN PD is an asynchronous active high input used to shut off all clocks cleanly prior to clock power. When PD is asserted high all clocks will be driven low before turning off the VCO. In PD de-assertion all clocks will start without glitches. PD CPU CPU# SRC SRC# PCIF/PCI USB 0 Normal 1 IREF * 2 or float Normal Normal Normal 33MHz Float IREF * 2 or float Float Low PD ASSERTION PD CPU 133MHz CPU# 133MHz SRC 100MHz SRC# 100MHz USB 48MHz PCI 33MHz REF 14.31818 16 DOT96 DOT96# REF 48MHz Normal Normal 14.318MHz Low IREF * 2 or float Float Low IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE PD DE-ASSERTION tSTABLE <1.8mS PD CPU 133MHz CPU# 133MHz SRC 100MHz SRC# 100MHz USB 48MHz PCI 33MHz REF 14.31818 tDRIVE_PWRDWN <300µS, <200mV 17 IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE DIFFERENTIAL CLOCK TRISTATE To minimize power consumption, CPU[2:0] clock outputs are individually configurable through SMBus to be driven or tristated during PD and CPU_STOP# mode and the SRC clock is configurable to be driven or tristated during PCI_STOP# and PD mode. Each differential clock (SRC, CPU[2:0]) output can be disabled by setting the corresponding output’s register OE bit to “0” (disable). Disabled outputs are to be tristated regardless of “CPU_STOP”, “SRC_STOP” and “PD” register bit settings. Signal Pin PD Pin CPU_STOP# CPU_STOPTristate Bit PD Tristate Bit Non-Stoppable Outputs Stoppable Outputs CPU 0 1 X X Running Running CPU 0 0 0 X Running Driven at IREF x 6 CPU 0 0 1 X Running Tristate CPU 1 X X 0 Driven at IREF x 2 Driven at IREF x 2 CPU 1 X X 1 Tristate Tristate NOTES: 1. Each output has four corresponding control register bits; OE, PD, CPU_STOP, and “Free Running”. 2. IREF x 6 and IREF x 2 is the output current in the corresponding mode. 3. See CONTROL REGISTERS section for bit address. Signal Pin PD Pin PCI_STOP# PCI_STOPTristate Bit PD Tristate Bit Non-Stoppable Outputs Stoppable Outputs SRC 0 1 X X Running Running SRC 0 0 0 X Running Driven at IREF x 6 SRC 0 0 1 X Running Tristate SRC 1 X X 0 Driven at IREF x 2 Driven at IREF x 2 SRC 1 X X 1 Tristate Tristate NOTES: 1. SRC output has four corresponding control register bits; OE, PD, SRC_STOP, and “Free Running”. 2. IREF x 6 and IREF x 2 is the output current in the corresponding mode. 3. See CONTROL REGISTERS section for bit address. TRISTATE DOT96 CLOCK CONTROL Signal Pin PD PD Tristate Bit Output DOT96 1 X Running DOT96 0 0 Driven at IREF x 2 DOT96 0 1 Tristate NOTES: 1. DOT output has two corresponding control register bits; OE and PD. 2. IREF x 6 and IREF x 2 is the output current in the corresponding mode. 3. See CONTROL REGISTERS section for bit address. 18 IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE LVDS AC TIMING REQUIREMENTS Following Conditions Apply Unless Otherwise Specified: Operating Condition: TA = 0°C to +70°C Symbol Parameter Min. Typ. Max. Unit tR1 Clock Rise Time(1,2,3) 175 — 700 ps tF1 Clock Fall Time(1,2,3) 175 — 700 ps ∆ tR Clock Rise Time Variation(2,3,4) — — 125 ps ∆ tF Clock Fall Time Variation(2,3,4) — — 125 ps Rise/Fall Matching(2,3,5) — — 20 % VHIGH Voltage HIGH(2,3,6) 660 700 850 mV VLOW Voltage LOW (2,3,7) -150 0 — mV VCROSS(ABS) Crossing Voltage (abs)(2,3,8,9,10) 250 — 550 mV VCROSS(REL) Crossing Voltage (rel)(2,3,10,11) TOTAL ∆ VCROSS tJCYC-CYC dT3 Calc. — Calc. Total Variation of VCROSS Over All Edges(2,3,12) — — 140 mV Cycle-to-Cycle Jitter(2,13) — — 350 ps Duty Cycle(2,13) 45 — 55 % VOVS Maximum Voltage Allowed at Output (overshoot)(2,3,14) — — VHIGH + 0.3V V VUDS Minimum Voltage Allowed at Output (undershoot)(2,3,15) -0.3 — — V VRB Ringback Margin(2,3) n/a — 0.2 V NOTES: 1. Measured from VOL = 1.75V to VOH =0.525V. Only valid for Rising LVDS and Falling LVDS#. Signal must be monotonic through the VOL to VOH region for tRISE and tFALL. 2. Test configuration is Rs = 32.2Ω, Rp = 49.9Ω, 2pF. 3. Measurement taken from single-ended waveform. 4. Measured with oscilloscope, averaging off, using Min. Max. statistics. Variation is the delta between Min. and Max. 5. Measured with oscilloscope, averaging off, the difference between the tRISE (average) of LVDS versus the tFALL (average) of LVDS#. 6. VHIGH is defined as the statistical average HIGH value as obtained by using the oscilloscope VHIGH math function. 7. VLOW is defined as the statistical average LOW value as obtained by using the oscilloscope VLOW math function. 8. Measured at crossing point where the instantaneous voltage value of the rising edge of LVDS equals the falling edge of LVDS#. 9. This measurement refers to the total variation from the lowest crossing point to the highest, regardless of which edge is crossing. 10. The crossing point must meet the absolute and relative crossing point specifications simultaniously. 11. VCROSS (rel) Min. and Max. are derived using the following: VCROSS (rel) Min. = 0.25V + 0.5 (VHAVG - 0.7V), VCROSS (rel) Max. = 0.55V + 0.5 (0.7V - VHAVG). 12. ∆ VCROSS is defined as the total variation of all crossing voltages of Rising LVDS and Falling LVDS#. This is the maximum allowed variance in VCROSS for any particular system. 13. Measurement is taken from differential waveform. 14. Overshoot is defined as the absolute value of the maximum voltage. 15. Undershoot is defined as the absolute value of the minimum voltage. 19 IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE LVDS AVERAGE PERIOD, TPERIOD(1,2,3,4) Following Conditions Apply Unless Otherwise Specified: Operating Condition: TA = 0°C to +70°C 96MHz Spread Min. 100MHz Max. Min. Max. Unit 0% (no spread) 10.406 10.427 9.99 10.01 ns 0.8% down-spread 10.406 10.511 9.99 10.09 ns 1% down-spread 10.406 10.531 9.99 10.11 ns 1.25% down-spread 10.406 10.557 9.99 10.135 ns 1.5% down-spread 10.406 10.583 9.99 10.16 ns 1.75% down-spread 10.406 10.61 9.99 10.185 ns 2% down-spread 10.406 10.636 9.99 10.21 ns 2.5% down-spread 10.406 10.688 9.99 10.26 ns 3% down-spread 10.406 10.74 9.99 10.31 ns ±0.3% down-spread 10.375 10.458 9.96 10.04 ns ±0.4% down-spread 10.365 10.469 9.95 10.05 ns ±0.5% down-spread 10.354 10.479 9.94 10.06 ns ±0.6% down-spread 10.344 10.49 9.93 10.07 ns ±0.8% down-spread 10.323 10.511 9.91 10.09 ns ±1% down-spread 10.302 10.531 9.89 10.11 ns ±1.25% down-spread 10.276 10.557 9.865 10.135 ns ±1.5% down-spread 10.25 10.583 9.84 10.16 ns NOTES: 1. Test configuration is Rs = 32.2Ω, Rp = 49.9Ω, 2pF. 2. The average period over any 1µS period of tiime must be greater than the minimum and less than the maximum specified period. 3. Measurement is taken from differential waveform. 4. Calculated using a ±0.1% accuracy in spread modulation. Assumes 300ppm long term accuracy on CLKIN. tRISE (LVDS) VOH = 0.525V LVDS LVDS# VCROSS VOL = 0.175V tFALL (LVDS#) Single-Ended Measurement Point for tRISE and tFALL 20 IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE MISCELLANEOUS AC TIMING REQUIREMENTS Following Conditions Apply Unless Otherwise Specified: Operating Condition: TA = 0°C to +70°C Symbol tPZL Parameter Output Enable Delay (All Outputs) (1) Min. Typ. Max. Unit 0 — 10 µs 0 — 10 µs — — 3 ms — — 3 ms tPZH tPLZ Output Disable Delay (All Outputs)(1) tPHZ tSTABLE All Clock Stabilization from Power-Up(2) tSPREAD Setting Period for Spread Selection Change (2,3) NOTES: 1. These specifications apply to the LVDS and SMBus pins. These pins must be tri-stated when PWRDWN is asserted. LVDS is driven differential when PWRDWN is de-asserted unless it is disabled. 2. The time specified is from when VDD achieves its nominal operating level (typical condition VDD = 3.3V) and PWRDWN is de-asserted until the frequency output is stable and operating within specification. 3. The time specified is measured from the spread selection change or output frequency change until the LVDS clock is operating at the new spread modulation and frequency. If there is another change in spread selection or output frequency during the tSPREAD settling period, then the settling period start resets to the most recent change in spread selection and output frequency. 21 IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE PWRDWN (POWER DOWN) CLARIFICATION PWRDWN CLOCK VCO On Off LVDS tPHZ LVDS# PWRDWN Assertion VDD PWRDWN CLOCK VCO Off Starting tSTABLE LVDS LVDS# tPZH PWRDWN De-Assertion 22 Stable IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE LVDS SYSTEM IMPLEMENTATION Clock Rs Rp Unit LVDS Clock 33.2 49.9 Ω 5% 1% 33Ω 5% CV125 Clock LVDS TLA 33Ω 5% Clock# LVDS# 475Ω 1% TLB 49.9Ω 1% 49.9Ω 1% 2pF 5% Test Load Board Configuration 23 2pF 5% IDTCV125 PROGRAMMABLE FLEXPC CLOCK FOR P4 PROCESSOR COMMERCIAL TEMPERATURE RANGE ORDERING INFORMATION XXX IDTCV Device Type XX Package X Grade CORPORATE HEADQUARTERS 2975 Stender Way Santa Clara, CA 95054 Blank Commercial Temperature Range (0°C to +70°C) PA PAG Thin Small Shrink Outline Package TSSOP - Green 125 Programmable FlexPC Clock for P4 Processor for SALES: 800-345-7015 or 408-727-6116 fax: 408-492-8674 www.idt.com 24 for Tech Support: [email protected] (408) 654-6459