ICS951411BGLFT
ICS951411BGLFT Datasheet
ICS951411
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ICS951411BGLFT |
ICS951411BGLFT (pdf) |
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ICS951411BGLF |
ICS951411BGLF |
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| Integrated Circuit Systems, Inc. ICS951411 System Clock Chip for ATI RS400 P4TM-based Systems Recommended Application ATI RS400 systems using Intel P4TM processors Output Features • 6 - Pairs of SRC/PCI-Express clocks • 2 - Pairs of ATIG SRC/PCI Express* clocks • 3 - Pairs of Intel P4 clocks • 3 - MHz REF clocks • 1 - 48MHz USB clock • 1 - 33 MHz PCI clock seed Features/Benefits • 2- Programmable Clock Request pins for SRC clocks • Supports CK410 or CK409 frequency table mapping • Spread Spectrum for EMI reduction • Outputs may be disabled via SMBus • External crystal load capacitors for maximum frequency accuracy Key Specifications • CPU outputs cycle-cycle jitter < 85ps • SRC output cycle-cycle jitter <125ps • PCI outputs cycle-cycle jitter < 250ps • +/- 300ppm frequency accuracy on CPU & SRC clocks Functionality - CK410# = 0 FS_C1 FS_B1 FS_A1 CPU MHz SRC MHz PCI MHz 0 1 0 1 RESERVED REF MHz USB MHz Functionality - CK410# = 1 FS_C1 Byte6 FS_B1 FS_A1 CPU MHz bit5 SRC MHz PCI MHz REF MHz USB MHz FS_C, FS_B and FS_A are low-threshold inputs. Please see the VIL_FS and VIH_FS specifications in the Input/Supply/Common Output Parameters Table for correct values. Pin Configuration X1 1 X2 2 VDD48 3 USB_48MHz 4 GND 5 VTT_PWRGD#/PD 6 SCLK 7 SDATA 8 **FS_C 9 **CLKREQA# 10 **CLKREQB# 11 SRCCLKT7 12 SRCCLKC7 13 VDDSRC 14 GNDSRC 15 SRCCLKT6 16 SRCCLKC6 17 SRCCLKT5 18 SRCCLKC5 19 GNDSRC 20 VDDSRC 21 SRCCLKT4 22 SRCCLKC4 23 SRCCLKT3 24 SRCCLKC3 25 GNDSRC 26 ATIGCLKT1 27 ATIGCLKC1 28 ICS951411 56 VDDREF 55 GND 54 **FS_A/REF0 53 **FS_B/REF1 52 **TEST_SEL/REF2 51 VDDPCI 50 **CK410#/PCICLK0 49 GNDPCI 48 *CPU_STOP# 47 CPUCLKT0 46 CPUCLKC0 45 VDDCPU 44 GNDCPU 43 CPUCLKT1 42 CPUCLKC1 41 CPUCLKT2_ITP 40 CPUCLKC2_ITP 39 VDDA 38 GNDA 37 IREF 36 GNDSRC 35 VDDSRC 34 SRCCLKT0 33 SRCCLKC0 32 VDDATI 31 GNDATI 30 ATIGCLKT0 29 ATIGCLKC0 Note Pins preceeded by '**' have a 120 Kohm Internal Pull Down resistor Pins preceeded by '*' have a 120 Kohm Internal Pull Up resistor 56-pin SSOP & TSSOP *Other names and brands may be claimed as the property of others. Integrated Circuit Systems, Inc. ICS951411 Pin Description PIN # PIN NAME VDD48 USB_48MHz VTT_PWRGD#/PD Ordering Information ICS951411yFLFT Example: ICS XXXX y F LF T Designation for tape and reel packaging Annealed Lead Free optional Package Type F = SSOP Device Type consists of 3 or 4 digit numbers Prefix ICS, AV = Standard Device Integrated Circuit Systems, Inc. ICS951411 INDEX AREA c E1 E SEATING PLANE aaa C 56-Lead mm. Body, mm. Pitch TSSOP 240 mil 20 mil In Millimeters In Inches SYMBOL COMMON DIMENSIONS COMMON DIMENSIONS SEE VARIATIONS SEE VARIATIONS BASIC BASIC BASIC BASIC SEE VARIATIONS SEE VARIATIONS VARIATIONS D mm. Reference Doc. JEDEC Publicat ion 95, M O-153 10-0039 D inch Ordering Information ICS951411yGLFT Example: ICS XXXX y G LF T Designation for tape and reel packaging Annealed Lead Free optional Package Type G = TSSOP Device Type consists of 3 or 4 digit numbers Prefix ICS, AV = Standard Device |
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