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| Integrated Circuit Systems, Inc. ICS9107C-21 ICS9107C-22 Preliminary Product Preview Frequency Generator for Fibre Channel Systems General Description The ICS9107C-21 and ICS9107C-22 are high-speed clock generators designed to support fibre channel system requirements. The ICS9107C-21 generates a single copy of the 106.25 MHz from a 17 MHz crystal. The ICS9107C-22 provides a second copy of the 106.25 MHz clock with output skew less than 100ps. An exact frequency multiplying ratio ensures better than 100 ppm frequency accuracy using a standard AT crystal with external load capacitors (typically 33pF5% for an 18pF load crystal). Achieving 100 ppm over four years requires the crystal to have a 20 ppm initial accuracy, 30 ppm temperature and 5 ppm/year aging coefficients. Features * * * * * * * * Generates one or two 106.25 MHz clocks from a 17 MHz crystal Less than 60ps one sigma jitter Less than 200ps absolute jitter Output skew less than 100ps on two channel version (-22) Rise/fall times less than 4ns driving 15pF On-chip loop filter components 5.5V supply range 8-pin, 150-mil SOIC package Applications * Specifically designed to support the high-speed clocking requirements of fibre channel systems Block Diagram 9107-21 /22 Rev C 9/14/99 PRODUCT PREVIEW documents contain information on new products in the sampling or preproduction phase of development. Characteristic data and other specifications are subject to change without notice. ICS9107C-21 ICS9107C-22 Preliminary Product Preview Pin Configurations 8-Pin SOIC 8-Pin SOIC Functionality OE 1 0 X1, X2 (MHz) 17.00 X FOUT (MHz) 106.25 Tristate Pin Descriptions PIN NUMBER PIN NAME 1 AGND 2 GND 3 4 5 6 7 8 X1 X2 OE VDD CLK2 AVDD VDD+AVDD CLK1 TYPE PWR PRW DESCRIPTION Analog ground. Digital Ground. Crystal or clock input to device; nominally 17.0 MHz. Requires external load IN capacitors. IN Crystal drive output from device. Requires external load capacitors. IN Output enable causes all outputs to tristate when at a logic low level; has a pull-up. PWR +5.0 volt supply (-21). OUT 106.25 MHz clock output (-22). PWR PWR Analog power. (Must equal digital power voltage) (-21). Digital and analog power, +5.0 volt supply (-22). OUT 106.25 MHz clock output. 2 ICS9107C-21 ICS9107C-22 Preliminary Product Preview Absolute Maximum Ratings AVDD, VDD referenced to GND . . . . . . . . . . . . . . . 7V Operating temperature under bias. . . . . . . . . . . . . . . . 0C to +70C Storage temperature . . . . . . . . . . . . . . . . . . . . . . . . . . -65C to +150C Voltage on I/O pins referenced to GND. . . . . . . . . . . GND -0.5V to VDD +0.5V Power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 Watts Stresses above 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 the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect product reliability. Electrical Characteristics at 5.0V Operating VDD = +4.5V to +5.5V; TA =0C to 70C unless otherwise stated PARAMETER Input Low Voltage Input High Voltage Input Low Current Input High Current Output Low Voltage1 Output High Voltage1 Output Low Current1 Output High Current1 Supply Current Pull-up Resistor1 Rise Time1 Fall Time1 Rise Time1 Fall Time1 Duty Cycle1 Jitter, One Sigma1 Jitter, Absolute1 Output Skew,1 Clock 1 to 2 Input Frequency Output Frequency1 Power-up Time1 Transition Time1 Crystal Input Capacitance1 1 SYMBOL VIL VIH IIL IIH VOL VOH IOL IOH IDD Rpu Tr1 Tf1 Tr2 Tf2 Dt Tj1s Tjab tsk1 Fi Fo Tpu Tft Cinx DC Characteristics TEST CONDITIONS VIN=0V (Pull-up input) VIN=VDD IOL=10mA IOH=-30mA VOL=0.8V VOH=2.0V Unloaded AC Characteristics 15pF load, 0.8 to 2.0V 15pF load, 2.0 to 0.8V 15pF load, 20% to 80% 15pF load, 80% to 20% 15pF load @ 1.4V 15pF load 15pF load 15pF load @ 1.4V (-22 only) MIN 2.0 -16.0 -2.0 2.4 22.0 42.0 -200.0 -100.0 11.0 2.0 - TYP -6.0 0.15 3.25 35.0 -50.0 22.0 380.0 0.8 0.7 1.5 1.0 49.0 30.0 MAX 0.8 2.0 0.40 -35.0 45.0 700.0 1.4 1.2 2.0 1.5 55.0 60.0 200.0 100.0 19.0 120.0 18.0 13.0 - UNITS V V A A V V mA mA mA k ohms ns ns ns ns % ps ps ps MH z MHz ms ms pF -20.0 17.0 106.25 7.58 6.0 5.0 8 to 66.6 MHz X1 (Pin 3) X2 (Pin 4) Note 1: Parameter is guaranteed by design and characterization. Not 100% tested in production. 3 ICS9107C-21 ICS9107C-22 Preliminary Product Preview 8-Pin Plastic SOIC Package Ordering Information ICS9107C-21CS08 or ICS9107C-22CS08 Example: XXX XXX PPP S X#W Lead Count & Package Width Package Type S=SOIC Lead Count=1, 2 or 3 digits W=.3 SOIC or .6 DIP; None=Standard Width Pattern Number (2 or 3 digit number for parts with ROM code patterns) Device Type (consists of 3 or 4 digit numbers) Prefix ICS, AV=Standard Device 4 PRODUCT PREVIEW documents contain information on new products in the sampling or preproduction phase of development. Characteristic data and other specifications are subject to change without notice. |
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