674R-01LF

DATASHEET ICS674-01 USER CONFIGURABLE DIVIDER Description Features The ICS674-01 consists of two separate configurable dividers. The A Divider is a 7-bit divider and can divide by 3 to 129. The B Divider consists of a 9-bit divider followed by a post divider. The 9-bit divider can divide by 12 to 519. The post divider has eight settings of 1, 2, 4, 5, 6, 7, 8, and 10; giving a maximum total divide of 5190. The A and B Dividers can be cascaded to give a maximum divide of 669510. The ICS674-01 supports the ICS673 PLL Building Block and enables the user to build a full custom PLL synthesizer. • • • • • • • • Packaged in 28-pin SSOP (150 mil body) • • • • Industrial temperature range available Pb (lead) free package, RoHS compliant General purpose programmable divider Supports ICS673 PLL Building Block User determines the divide by setting input pins Pull-ups on all select inputs Includes one 7-bit Divider for OUTA Includes one 9-bit Divider and one selectable Post Divider for OUTB 25 mA drive capability at TTL levels Advanced, low power CMOS process Operating voltage of 3.3 V or 5 V Block Diagram A6:A0 VDD 7 INA Divider A (7-Bit) INB Divider B (9-Bit) 9 B8:B0 IDT™ / ICS™ USER CONFIGURABLE DIVIDER 2 OUTA Post Divider 3 GND 1 OUTB 3 S2:S0 ICS674-01 REV H 051310 ICS674-01 USER CONFIGURABLE DIVIDER CLOCK DIVIDER Pin Assignment Post Divider Table A5 1 28 A4 2 27 A3 S2 Pin 5 S1 Pin 4 S0 Pin 3 Post Divide A6 S0 3 26 A2 0 0 0 10 S1 4 25 A1 0 0 1 2 S2 5 24 A0 VDD 6 23 VDD 0 1 0 8 0 1 1 4 INA 7 22 OUTA INB 8 21 OUTB 1 0 0 5 GND 9 20 GND 1 0 1 7 B0 10 19 GND 1 1 0 1 B1 11 18 B8 1 1 1 6 B2 12 17 B7 B3 13 16 B6 B4 14 15 B5 28 pin (150 mil) SSOP Pin Descriptions Pin Number Pin Name Pin Type 1, 2, 24 - 28 A5, A6, A0-A4 Input Divider A word input pins. Forms a number from 1 to 127. Internal pull-up resistors. See page 3 for details. 3-5 S0, S1, S2 Input Select pins for Post Divider. See table above. Internal pull-up resistors. 6, 23 VDD Power Connect to VDD. 7 INA Input Divider A input. 8 INB Input Divider B input. 9, 19 - 20 GND Power Connect to ground. 10 - 18 B0 - B8 Input Divider B word input pins. Forms a number from 4 to 511. Internal pull-up resistors. See page 3 for details. 21 OUTB Output Divider B output. 22 OUTA Output Divider A output. IDT™ / ICS™ USER CONFIGURABLE DIVIDER Pin Description 2 ICS674-01 REV H 051310 ICS674-01 USER CONFIGURABLE DIVIDER CLOCK DIVIDER External Components The ICS674-01 requires a minimum number of external components for proper operation. A 0.01µF decoupling capacitor should be connected between each VDD and GND as close to the device as possible. A series termination resistor of 33Ω should be used in series with OUTA and OUTB pins. Determining (setting) the Divider The user has full control in setting the desired divide. The user should connect the appropriate divider select input pins directly to ground (or VDD, although this is not required because of internal pull-ups) during Printed Circuit Board layout, ensuring that the ICS674-01 will automatically produce the correct divide when all components are soldered. It is also possible to connect the inputs to parallel I/O ports in order to change divides. The divides of the ICS674-01 can be determined by the following equations: Divide A = DAW + 2 Where Divider A Word (DAW) = 1 to 127 (0 is not permitted) Divide B = (DBW+8) x PD Where Divider B Word (DBW) = 4 to 511 (0, 1, 2, 3 are not permitted) Post Divider (PD) = values on page 2 For example, suppose Divide A is desired to be 61 and Divide B is desired to be 284, then DAW = 59, DBW = 276, and PD = 1. This means A6:A0 is 0111011, B8:B0 is 100010100 and S2:S0 is 110. Since all inputs have pull-ups, it is only necessary to ground the zero pins, namely A6, A2, B7, B6, B5, B1, B0, and S0. These configuration pins can be changed at any time during operation. IDT™ / ICS™ USER CONFIGURABLE DIVIDER 3 ICS674-01 REV H 051310 ICS674-01 USER CONFIGURABLE DIVIDER CLOCK DIVIDER Using the ICS674-01 with the ICS673-01: The ICS674-01 may be used with the ICS673-01 to build a frequency synthesizer. The following example shows a typical application when the reference clock is in the MHz range: Reference Clock Divide A REFIN CLK1 Ouput Clock ICS673-01 FBIN CLK2 Post Divide Divide B ICS674-01 If the reference is in the kHz range, for example 8 kHz, the following configuration may be more typical: REFIN Reference Clock CLK1 Ouput Clock ICS673-01 FBIN Divide A Post Divide CLK2 Divide B ICS674-01 Note that in both examples, Divide B is connected to the output of the ICS673. This is because Divide B has a higher operating frequency than Divide A. IDT™ / ICS™ USER CONFIGURABLE DIVIDER 4 ICS674-01 REV H 051310 ICS674-01 USER CONFIGURABLE DIVIDER CLOCK DIVIDER Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the ICS674-01. These ratings, which are standard values for IDT commercially rated parts, are stress ratings only. 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 can affect product reliability. Electrical parameters are guaranteed only over the recommended operating temperature range. Item Rating Supply Voltage, VDD 7V All Inputs and Outputs -0.5 V to VDD+0.5 V CLKIN and FBIN inputs -0.5 V to 5.5 V Electrostatic Discharge 2000 V Ambient Operating Temperature 0 to +70° C Ambient Operating Temperature (I version) -40 to +85° C Storage Temperature -65 to +150° C Junction Temperature 150° C Soldering Temperature 260° C Recommended Operation Conditions Parameter Min. Max. Units 0 +70 °C +3.0 +5.5 V Ambient Operating Temperature Power Supply Voltage (measured in respect to GND) Typ. DC Electrical Characteristics VDD=5 V ±10%, Ambient temperature -40 to +85° C, unless stated otherwise Parameter Symbol Conditions Min. Typ. Units 5.5 V Operating Voltage VDD Input High Voltage VIH All A, B, and S pins Input Low Voltage VIL All A, B, and S pins Input High Voltage VIH INA and INB only (VDD/2)+1 VDD/2 Input Low Voltage VIL INA and INB only VDD/2 Output High Voltage VOH IOH = -25 mA Output Low Voltage VOL IOL = 25 mA mA IDD No load, fin=100 MHz 3.3 V 3 Operating Supply Current DivA=DivB=20 No load, fin=100 MHz 5V 5 mA IDT™ / ICS™ USER CONFIGURABLE DIVIDER 3.0 Max. 5 2 V 0.8 V V (VDD/2)-1 2.4 V V 0.4 ICS674-01 V REV H 051310 ICS674-01 USER CONFIGURABLE DIVIDER Parameter CLOCK DIVIDER Symbol Conditions Min. Typ. Max. Units Short Circuit Current IOS Each output ±70 mA On-Chip Pull-up Resistor RPU A, B, S select pins 270 kΩ Input Capacitance CIN A, B, S select pins 5 pF AC Electrical Characteristics VDD = 5 V, Ambient Temperature -40 to +85° C, CLOAD at CLK = 15 pF, unless stated otherwise Parameter Symbol Input Frequency, Divider A fIN Conditions Min. Typ. Max. Units 3.3 V 0 135 MHz Input Frequency, Divider B 3.3 V 0 180 MHz Input Frequency, Divider A 5V 0 200 MHz Input Frequency, Divider B 5V 0 235 MHz at 3.3 V, +85° C 0 125 MHz Input Frequency, Divider B (Industrial temperature) at 3.3 V, +85° C 0 170 MHz Input Frequency, Divider A (Industrial temperature) at 5 V, +85° C 0 190 MHz Input Frequency, Divider B (Industrial temperature) at 5 V, +85° C 0 220 MHz Input Frequency, Divider A (Industrial temperature) fIN tOR 20% to 80% 1.5 ns tOF 80% to 20% 1.5 ns tDC at VDD/2 45 OUTB Clock Duty Cycle odd post dividers at VDD/2, except PD=1 OUTA Clock Duty Cycle1 at VDD/2 Peak-to-Peak Jitter Cycle-to-Cycle Jitter Output Rise Time Output Fall Time 1 OUTB Clock Duty Cycle Propagation Delay, Divider A TPA Propagation Delay, Divider B + Post Divider TPB 49 to 51 55 % 40 60 % 20 98.5 % 15 pF 400 ps 30 pF loads 300 ps VDD = 3.3 V, +25° C 6.5 ns VDD = 5.0 V, +25° C 4.5 ns VDD = 3.3 V, +25° C 20 ns VDD = 5.0 V, +25° C 13 ns 1 The duty cycle of OUTA is dependent on the selected divide. This because OUTA goes low for 1 input clock cycles on INA. For example, if a divide of 20 is selected, the duty cycle will be 90%. Simlarly, if PD=1 is selected for OUTB, the duty cycle will be dependent on the selected divide. In this case, OUTB goes high for approximately 8 input clock cycles on INB. IDT™ / ICS™ USER CONFIGURABLE DIVIDER 6 ICS674-01 REV H 051310 ICS674-01 USER CONFIGURABLE DIVIDER CLOCK DIVIDER Package Outline and Package Dimensions (28-pin SSOP, 150 Mil. Body) Package dimensions are kept current with JEDEC Publication No. 95 Millimeters 28 Symbol E1 A A1 A2 b C D E E1 e L α E INDEX AREA 1 2 D Min Inches* Max 1.35 1.75 0.10 0.25 -1.50 0.20 0.30 0.18 0.25 9.80 10.00 5.80 6.20 3.80 4.00 0.635 Basic 0.40 1.27 0° 8° Min Max .053 .069 .0040 .010 -.059 0.008 0.012 .007 .010 .386 .394 .228 .244 .150 .157 0.025 Basic .016 .050 0° 8° *For reference only. Controlling dimensions in mm. A A2 A1 c -Ce b SEATING PLANE L .10 (.004) C Ordering Information Part / Order Number Marking Shipping Packaging Package Temperature 674R-01LF 674R-01LFT 674R-01ILF 674R-01ILFT 674R-01LF 674R-01LF 674R-01ILF 674R-01ILF Tubes Tape and Reel Tubes Tape and Reel 28-pin SSOP 28-pin SSOP 28-pin SSOP 28-pin SSOP 0 to +70° C 0 to +70° C -40 to 85° C -40 to 85° C "LF" suffix to the part number are the Pb-Free configuration and are RoHS compliant. While the information presented herein has been checked for both accuracy and reliability, Integrated Device Technology (IDT) assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use in normal commercial applications. Any other applications such as those requiring extended temperature range, high-reliability, or other extraordinary environmental requirements are not recommended without additional processing by IDT. IDT reserves the right to change any circuitry or specifications without notice. IDT does not authorize or warrant any IDT product for use in life support devices or critical medical instruments. IDT™ / ICS™ USER CONFIGURABLE DIVIDER 7 ICS674-01 REV H 051310 ICS674-01 USER CONFIGURABLE DIVIDER CLOCK DIVIDER Innovate with IDT and accelerate your future networks. Contact: www.IDT.com For Sales For Tech Support 800-345-7015 408-284-8200 Fax: 408-284-2775 www.idt.com/go/clockhelp Corporate Headquarters Integrated Device Technology, Inc. www.idt.com © 2006 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT and the IDT logo are trademarks of Integrated Device Technology, Inc. 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