Cost Clock Generator PentiumBased Designs DIMM) Sel2 FREQUEN

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

Cost Clock Generator PentiumBased Designs DIMM) Sel2 FREQUEN

Datasheet Thumbnail

Top Searches for this datasheet

SC663
Cost Clock Generator PentiumBased Designs DIMM)
Sel2
FREQUENCY TABLE
Sel1 Sel0 tristate 66.6 tristate a.32 27.5 37.5 33.3 test
Designed Intel spec. supporting three Synchronous DRAM with Intel chipset host (CPU) clocks. SDRAM Clocks DIMM support. clocks skew CPU, buffers SSOP package minimum board space
test a.32 Asynchronous PCI.
BLOCK DIAGRAM
CONNECTION DIAGRAM
CPU4 CPU3 CPU2 CPU1 VDDCPU IOAPIC VDDIO Xout Sel2 Sel1 Sel0 PCI1 Rev. SDRM12 SDRM11 SDRM10 SDRM9 SDRM8 SDRM7 SDRM6 SDRM5 SDRM4 SDRM3 SDRM2 SDRM1 PCI6 PCI5 PCI4 PCI3 PCI2 5/5/97 Page
XOUT Sel2 Sel1 Sel0
IOAPIC
VDDIO
PLL1
VDDCPU
CPUCLK(1:4) SDRM (1:12)
PCICLK(1:6)
PLL2
INTERNATIONAL MICROCIRCUITS, INC. COCHES MILPITAS, 95035 TEL: 408-263-6300 ext. 408-263-6571
SC663
Cost Clock Generator PentiumBased Designs DIMM)
DESCRIPTION
11,12 Name Xin, Xout TYPE Description These pins form on-chip reference oscillator when connected terminals external parallel resonant crystal (nominally 14.318 MHz). also serve input externally generated reference signal. Standard frequency select inputs. They have internal pull-ups. (See table, Page skew (<250 clock outputs host frequencies such CPU, Chipset, Cache. VDDCPU supply voltage these outputs. skew (<250 clock outputs supporting SDRAM modules.
2,3,4,5 33,34,35, 36,38,39, 40,41,45, 46,47,48 24,25,26, 27,29,30 1,10,16, 19,28,37, 42,44 13,15,20, 23,31,32,
SEL(0:2) (1:4) SDRM(1:12)
(1:6) IOAPIC 48MHz 24MHz
skew (<250pS) clock outputs frequencies. They synchronous Clocks. Buffered output crystal reference. Buffered output crystal reference. This independently powered VDDIO. Frequency output USB. Frequency output super I/O. Circuit Ground.
Power supply.(3.3Volts)
VDDCPU VDDIO
Indepedent power supply clocks. connected 3.3V 2.5V. Indepedent power supply IOAPIC clock connectec 3.3V 2.5V
bypass capacitor (0.1µF) should placed close possible each VDD, VDDCPU, VDDIO pins. these bypass capacitors close pins their high frequency filtering characteristic will cancelled lead inductances traces.
INTERNATIONAL MICROCIRCUITS, INC. COCHES MILPITAS, 95035 TEL: 408-263-6300 ext. 408-263-6571
Rev.
5/5/97 Page
SC663
Cost Clock Generator PentiumBased Designs DIMM)
Preliminary MAXIMUM RATINGS
Voltage Relative VSS: Voltage Relative VDD: Storage Temperature: Ambient Temperature: Maximum Power Supply: -0.3V 0.3V This device contains circuitry protect inputs against damage high static voltages electric field; however, precautions should taken avoid application voltage higher than maximum rated voltages this circuit. proper operation, Vout should constrained range: VSS<(Vin Vout)<VDD
ELECTRICAL CHARACTERISTICS
Characteristic Input Voltage Input High Voltage Input High Current, Pull- Output Voltage Output High Voltage Tri-State leakage Current Dynamic Supply Current Static Supply Current Short Circuit Current Symbol (PD) Units Conditions S0-S2 Inputs Outputs, 12mA Outputs, 12mA Outputs 66.6 MHz, 33.3 Mhz, load output time seconds 3.3V+5%,
SWITCHING CHARACTERISTICS
Characteristic Output Rise (0.4V 2.0V) Fall (2.0V-0.4V) time Output Duty Cycle Offset Skew,CPU, PCI, SDRAM Period Cycles, Jitter Absolute, Symbol tTLH, tTHL tOFF tSKEW tjab +250 Units Conditions clock outputs, load Measured 1.5V Measured 1.5V Measured 1.5V 3.3V+5%,
INTERNATIONAL MICROCIRCUITS, INC. COCHES MILPITAS, 95035 TEL: 408-263-6300 ext. 408-263-6571
Rev.
5/5/97 Page
SC663
Cost Clock Generator PentiumBased Designs DIMM)
LAYOUT RECOMMENDATION
Island plane plane
IMISC663
22µF
22µF
This only layout recommendation best performance lower EMI. designer choose differnent approach C10, C11, (all 0.1µf) should always used placed close their pins. Clock Gen. placed noisy enviroment, designer choose place vias island outer side (between Cap) pins case, trace between must always short possible. improved current ground return paths, designer choose place vias pin. This will lower bounce ground return improves EMI.
INTERNATIONAL MICROCIRCUITS, INC. COCHES MILPITAS, 95035 TEL: 408-263-6300 ext. 408-263-6571
Rev.
5/5/97 Page
SC663
Cost Clock Generator PentiumBased Designs DIMM)
Preliminary PACKAGE DRAWING DIMENSIONS SSOP OUTLINE DIMENSIONS
INCHES SYMBOL 0.024 0.085 0.032 0.093 0.040 0.100 0.61 2.16 0.81 2.36 1.02 2.54
MILLIMETERS 0.110 0.016 0.092 0.0135 0.010 0.630 0.299 2.41 0.20 2.24 0.203 0.127 15.75 7.42 2.59 0.31 2.29 0.254 15.88 7.52 0.635 0.410 0.016 10.16 0.25 10.31 0.33 10.41 0.41 2.79 0.41 2.34 0.343 0.254 16.00 7.59
0.095 0.008 0.088 0.008 0.005 0.620 0.292
0.102 0.012 0.090 0.010 0.625 0.296 0.025
0.400 0.10
0.406 0.013
ORDERING INFORMATION
Part Number IMISC663BYB Note:
Marking:
Package Type SSOP
Production Flow Commercial,
ordering part number formed combination device number, device revision, package style, screening shown below.
Example: SC663BYB Date Code,
IMISC663BYB Flow Commercial, Package SSOP Revision Device Number
INTERNATIONAL MICROCIRCUITS, INC. COCHES MILPITAS, 95035 TEL: 408-263-6300 ext. 408-263-6571
Rev.
5/5/97 Page

Cost Clock Generator PentiumBased Designs DIMM) Sel2 FREQUEN

Top Searches for this datasheet

Other recent searches