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Part: PI6C410V
Category:
Timing Circuits
-> Clock Generators
-> Motherboard
Description: 400MHz Clock Generator For Desktop PC
Company: Pericom Semiconductor Corporation
Datasheet: Download PI6C410V datasheet File size : 292 kB
Request For quote: Find where to buy PI6C410V
Datasheet text preview:
PI6C410
Clock Generator for Intel PCI-Express Desktop Chipset
Product Features
· 14.318 MHz Crystal Input · Selectable of 100, 133, 166, 200, 266, 333, and 400MHz CPU Output Frequencies · SMBus: Power Management Control · Spread Spectrum support (-0.5% down spread) · Packages (Pb-free & Green available): -56-Pin SSOP -56-Pin TSSOP
Product Description
PI6C410 is a high-speed, low-noise clock generator designed to work with Intel Desktop PCI-Express Chipset. Spread Spectrum PLL based clock generator reduce EMI emission and support a wide range of frequencies. Jitter Performance · < 85ps Cycle to Cycle CPU clock jitter · < 350ps Cycle to Cycle 48MHz clock jitter · < 500ps Cycle to Cycle PCI clock jitter · < 125ps Cycle to Cycle SRC clock jitter · < 1000ps Cycle to Cycle REF clock jitter Skew Performance · < 100ps Output to output CPU clock skew · < 500ps Output to output PCI clock skew · < 250ps Output to output SRC clock skew
Output Features
· Two Pairs of Differential CPU Clocks · One selectable of CPU/SRC Clock · Six Pairs of SRC Clocks · Nine PCI Clocks · One 48 MHz USB clock · One REF clock · One 96 MHz Differential clock
Pin Description
VDD_PCI VSS_PCI PCI_3 PCI_4 PCI_5 VSS_PCI VDD_PCI PCIF_0 / ITP_EN PCIF_1 PCIF_2 VDD_48 USB_48 VSS_48 DOT_96 DOT_96# FS_B / TEST_MODE VTT_PWRGD# / PWRDWN FS_A SRC_1 SRC_1# VDD_SRC SRC_2 SRC_2# SRC_3 SRC_3# SRC_4 SRC_4# VDD_SRC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 PCI_2 PCI_1 PCI_0 FS_C / TEST_SEL REF VSS_REF XTAL_IN XTAL_OUT VDD_REF SDA SCL VSS_CPU CPU_0 CPU_0# VDD_CPU CPU_1 CPU_1# IREF VSS_A VDD_A CPU2_ITP / SRC7 CPU2_ITP# / SRC7# VDD_SRC SRC_6 SRC_6# SRC_5 SRC_5# VSS_SRC
Logic Block Diagram
XTAL_IN XTAL_OUT XTAL OSC PLL 2 /2 PLL 1 SDA SCL Div
DOT_96 DOT 96# USB_48 REF PCI [0:5] PCIF[0:2]
SMBus Logic
Div FS_A FS_B / TEST_MODE FS_C / TEST_SEL VTT_PWRGD# / PWRDWN PCIF_0 / ITP_EN C O N T R O L
SRC [1:6] SRC [1:6]# CPU2_ITP / SRC7 CPU2_ITP# / SRC7#
Div
CPU[0:1] CPU[0:1]#
1
PS8734
05/19/04
PI6C410 Clock Generator for Intel PCI-Express Desktop Chipset Pin Description
Pin Name REF XTAL_IN XTAL_OUT CPU[0:1] & CPU[0:1]# SRC[1:6] & SRC[1:6]# CPU2_ITP / SRC_7 & CPU2_ITP# / SRC_7# PCIF_0 / ITP_EN PCIF[1:2] PCI[0:5] USB_48 DOT_96 & DOT_96# FS_A FS_B / TEST_MODE FS_C / TEST_SEL IREF VTT_PWRGD# / PWRDWN SDA SCL VDD_PCI VDD_48 VDD_SRC VDD_CPU VDD_REF VSS_PCI VSS_48 VSS_SRC VSS_CPU VSS_REF VDD_A VSS_A Type Output Input Output Output Output Pin No 52 50 49 40, 41, 43, 44 19, 20, 22, 23, 24, 25, 26, 27, 30, 31, 32, 33 35, 36 8 9, 10 3, 4, 5, 54, 55, 56 12 14, 15 18 16 53 39 17 47 46 1, 7 11 21, 28, 34 42 48 2, 6 13 29 45 51 37 38 Descriptions 3.3V 14.31818MHz output 14.31818MHz crystal input 14.31818MHz crystal output Differential CPU outputs Differential Serial Reference Clock outputs Selectable Differential CPU or SRC clock output ITP_EN = 0 @ Vtt_Pwrgd# assertion = SRC ITP_EN = 1 @ Vtt_Pwrgd# assertion = CPU 33MHz clock output / CPU2 select when HIGH 33MHz clocks outputs (free running) 33MHz clocks outputs 48MHz clock output 96MHz differential clock output 3.3V LVTTL inputs for CPU frequency selection 3.3V LVTTL inputs for CPU frequency selection / Test Mode select: 0 = HiZ, 1 = Ref/N 3.3V LVTTL inputs for CPU frequency selection / Test Mode select if pulled to 3.3V when Vtt_Pwrgd# is asserted LOW External resistor connection for internal current reference 3.3V LVTTL Level sensitive strobe used to determine to latch the FS_A, FS_B/TEST_MODE, FS_C/TEST_SEL and PCIF0/ ITP_EN inputs (active low) / 3.3V LVTTL active high input for Power Down operation. SMBus compatible SDATA SMBus compatible SCLOCK 3.3V Power Supply for Outputs 3.3V Power Supply for Outputs 3.3V Power Supply for Outputs 3.3V Power Supply for Outputs 3.3V Power Supply for Outputs Ground for Outputs Ground for Outputs Ground for Outputs Ground for Outputs Ground for Outputs 3.3V Power Supply for PLL Ground for PLL
PS8734 05/19/04
Output Input / Output Output Output Output Output Input Input Input Input Input I/O Input Power Power Power Power Power Ground Ground Ground Ground Ground Power Ground
2
PI6C410 Clock Generator for Intel PCI-Express Desktop Chipset
Functionality
Frequency Selection FS_C 1 0 0 0 0 1 1 1 FS_B 0 0 1 1 0 0 1 1 FS_A 1 1 1 0 0 0 0 1 CPU 100MHz 133MHz 166MHz 200MHz 266MHz 333MHz 400MHz Reserved SRC 100MHz 100MHz 100MHz 100MHz 100MHz 100MHz 100MHz 100MHz PCIF / PCI 33MHz 33MHz 33MHz 33MHz 33MHz 33MHz 33MHz 33MHz REF 14.318MHz 14.318MHz 14.318MHz 14.318MHz 14.318MHz 14.318MHz 14.318MHz 14.318MHz DOT_96 96MHz 96MHz 96MHz 96MHz 96MHz 96MHz 96MHz 96MHz USB_48 48MHz 48MHz 48MHz 48MHz 48MHz 48MHz 48MHz 48MHz Note 1 1 1 1 1 1 1 1
Notes: 1. Refer to DC Electrical Characteristics for FS_A, FS_B and FS_C (Vih_FS, Vil_FS) threshold levels
Test Mode Selection TEST_MODE 1 0
Notes: 2. Test mode will occur where the SMBus Bit 6 of Byte 6 = 1, or FS_C/TEST_SEL is set to logic high level.
CPU REF/N Hi-Z
SRC REF/N Hi-Z
PCIF / PCI REF/N Hi-Z
REF REF Hi-Z
DOT_96 REF/N Hi-Z
USB_48 REF/N Hi-Z
Note 2 2
PWRDWN Functionality PWRDWN 0 1 CPU Normal Iref × 2 or Float CPU# Normal Float SRC Normal Iref × 2 or Float SRC# Normal Float PCIF / PCI 33MHz Low REF 14.318MHz Low DOT_96 Normal Iref × 2 or Float DOT_96# Normal Float USB_48 48MHz Low
3
PS8734
05/19/04
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