 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| PRELIMINARY DATASHEET LOW SKEW 1 TO 4 CLOCK BUFFER Description The ICS621 is a low skew, single input to four output, clock buffer. The device operates from a single 1.2 to 1.8 volt supply and has a 3.3 volt tolerant input, making it ideal for level translation. IDT makes many non-PLL and PLL based low skew output devices as well as Zero Delay Buffers to synchronize clocks. Contact us for all of your clocking needs. ICS621 Features * * * * * * * * Low skew outputs (150 ps) Packaged in 8-pin SOIC or 8-pin DFN (2x2mm) Available in RoHS 5 or RoHS 6 (lead-free) package Low power CMOS technology Operating Voltages of 1.2 V to 1.8 V Output Enable pin tri-states outputs 3.3 V tolerant input clock Industrial or commercial temperature ranges Block Diagram Q0 Q1 ICLK Q2 Q3 Output Enable IDTTM / ICSTM LOW SKEW 1 TO 4 CLOCK BUFFER 1 ICS621 REV B 030907 ICS621 LOW SKEW 1 TO 4 CLOCK BUFFER FAN OUT BUFFER Pin Assignment (8-pin SOIC) ICLK Q1 Q2 Q3 1 2 3 4 8 7 6 5 OE VDD GND Q4 Pin Assignment (8-pin DFN) ICLK Q1 Q2 Q3 4 5 1 8 OE VDD GND Q4 Pin Descriptions Pin Pin Number Name 1 2 3 4 5 6 7 8 ICLK Q1 Q2 Q3 Q4 GND VDD OE Pin Type Input Output Output Output Output Power Power Input Clock Output 1. Clock Output 2. Clock Output 3. Clock Output 4. Connect to ground. Connect to +1.2 V or +1.8 V. Pin Description Clock Input. 3.3 V tolerant input. Output Enable. Tri-states outputs when low. Connect to VDD for normal operation. External Components A minimum number of external components are required for proper operation. A decoupling capacitor of 0.01 F should be connected between VDD on pin 7 and GND on pin 6, as close to the device as possible. A 33 series terminating resistor may be used on each clock output if the trace is longer than 1 inch. To achieve the low output skew that the ICS621 is capable of, careful attention must be paid to board layout. Essentially, all four outputs must have identical terminations, identical loads and identical trace geometries. If they do not, the output skew will be degraded. For example, using a 30 series termination on one output (with 33 on the others) will cause at least 15 ps of skew. IDTTM / ICSTM LOW SKEW 1 TO 4 CLOCK BUFFER 2 ICS621 REV B 030907 ICS621 LOW SKEW 1 TO 4 CLOCK BUFFER FAN OUT BUFFER Absolute Maximum Ratings Stresses above the ratings listed below can cause permanent damage to the ICS621. 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 Supply Voltage, VDD Output Enable and All Outputs ICLK Ambient Operating Temperature (industrial) Ambient Operating Temperature (commercial) Storage Temperature Junction Temperature Soldering Temperature 5V Rating -0.5 V to VDD+0.5 V -0.5 V to 3.6 V (VDD > 0V) -40 to +85 C 0 to +70 C -65 to +150C 125C 260C Recommended Operation Conditions Parameter Ambient Operating Temperature (industrial) Ambient Operating Temperature (commercial) Power Supply Voltage (measured in respect to GND) Min. -40 0 1.14 Typ. Max. +85 +70 1.89 Units C C V IDTTM / ICSTM LOW SKEW 1 TO 4 CLOCK BUFFER 3 ICS621 REV B 030907 ICS621 LOW SKEW 1 TO 4 CLOCK BUFFER FAN OUT BUFFER DC Electrical Characteristics VDD=1.2 V 5%, Ambient temperature -40 to +85C or 0 to +70C, unless stated otherwise Parameter Operating Voltage Input High Voltage Input Low Voltage Output High Voltage Output Low Voltage Operating Supply Current Nominal Output Impedance Input Capacitance Short Circuit Current Symbol VDD VIH VIL VOH VOL IDD ZO CIN IOS Conditions Note 1, ICLK, OE Note 1, ICLK, OE IOH = -2 mA IOL = 2 mA No load, 133 MHz ICLK, OE pin Min. 1.14 0.65VDD 0.75VDD Typ. Max. 1.26 VDD+0.3 0.35VDD 0.25VDD Units V V V V V mA TBD 20 5 20 pF mA Notes: 1. Nominal switching threshold is VDD/2 VDD=1.5 V 5%, Ambient temperature -40 to +85C or 0 to +70C, unless stated otherwise Parameter Operating Voltage Input High Voltage Input Low Voltage Output High Voltage Output Low Voltage Operating Supply Current Nominal Output Impedance Input Capacitance Short Circuit Current Symbol VDD VIH VIL VOH VOL IDD ZO CIN IOS Conditions Note 1, ICLK, OE Note 1, ICLK, OE IOH = -6 mA IOL = 6 mA No load, 133 MHz ICLK, OE pin Min. 1.425 0.65VDD 0.75VDD Typ. Max. 1.575 VDD+0.3 0.35VDD 0.25VDD Units V V V V V mA 25 20 5 28 pF mA Notes: 1. Nominal switching threshold is VDD/2 VDD=1.8 V 5%, Ambient temperature -40 to +85C or 0 to +70C, unless stated otherwise Parameter Operating Voltage Input High Voltage, ICLK Input Low Voltage, ICLK Output High Voltage Output Low Voltage Operating Supply Current Nominal Output Impedance Input Capacitance Short Circuit Current Symbol VDD VIH VIL VOH VOL IDD ZO CIN IOS Conditions Note 1, ICLK, OE Note 1, ICLK, OE IOH = -8 mA IOL = 8 mA No load, 133 MHz ICLK, OE pin Min. 1.71 0.65VDD 1.35 Typ. Max. 1.89 VDD+0.3 0.35VDD 0.45 Units V V V V V mA 50 20 5 50 pF mA Notes: 1. Nominal switching threshold is VDD/2 IDTTM / ICSTM LOW SKEW 1 TO 4 CLOCK BUFFER 4 ICS621 REV B 030907 ICS621 LOW SKEW 1 TO 4 CLOCK BUFFER FAN OUT BUFFER AC Electrical Characteristics VDD = 1.2 V 5%, Ambient Temperature -40 to +85C or 0 to +70C, unless stated otherwise Parameter Input Frequency Output Rise Time Output Fall Time Propagation Delay Output to Output Skew Symbol tOR tOF Note 1 Note 2 Conditions 20% to 80%, Note 3 80% to 20%, Note 3 Min. 0 Typ. 1.0 1.0 Max. Units 100 1.5 1.5 5 150 MHz ns ns ns ps 2.2 Rising edges at VDD/2 3 0 VDD = 1.5 V 5%, Ambient Temperature -40 to +85C or 0 to +70C, unless stated otherwise Parameter Input Frequency Output Rise Time Output Fall Time Propagation Delay Output to Output Skew Symbol tOR tOF Note 1 Note 2 Conditions 20% to 80%, Note 3 80% to 20%, Note 3 Min. 0 Typ. 1.0 1.0 Max. Units 166 1.5 1.5 5 150 MHz ns ns ns ps 2.2 Rising edges at VDD/2 3 0 VDD = 1.8 V 5%, Ambient Temperature -40 to +85C or 0 to +70C, unless stated otherwise Parameter Input Frequency Output Rise Time Output Fall Time Propagation Delay Output to Output Skew Symbol tOR tOF Note 1 Note 2 Conditions 20% to 80%, Note 3 80% to 20%, Note 3 Min. 0 Typ. 1.0 1.0 Max. Units 200 1.5 1.5 5 150 MHz ns ns ns ps 2.2 Rising edges at VDD/2 3 0 Notes: 1. With rail to rail input clock 2. Between any 2 outputs with equal loading. 3. Measured with a 15 pF load. Thermal Characteristics Parameter Thermal Resistance Junction to Ambient Symbol JA JA JA JC JT Conditions Still air 1 m/s air flow 3 m/s air flow Min. Typ. 150 140 120 40 Max. Units C/W C/W C/W C/W Thermal Resistance Junction to Case Case Temperature Thermal Resistance Junction to Top of Case 120 Still air 20 C C/W IDTTM / ICSTM LOW SKEW 1 TO 4 CLOCK BUFFER 5 ICS621 REV B 030907 ICS621 LOW SKEW 1 TO 4 CLOCK BUFFER FAN OUT BUFFER Package Outline and Package Dimensions (8-pin DFN 2x2mm, 0.5mm pitch) Package dimensions are kept current with JEDEC Publication No. 95, Symbol Min Millimeters Max A A1 A3 b N ND NE D E e D2 E2 L aaa bbb ccc 0.80 1.00 0 0.05 0.20 Reference 0.20 0.30 8 4 0 2.00 BASIC 2.00 BASIC 0.50 BASIC 1.05 1.25 0.45 0.65 0.20 0.40 0.15 0.10 0.10 IDTTM / ICSTM LOW SKEW 1 TO 4 CLOCK BUFFER 6 ICS621 REV B 030907 ICS621 LOW SKEW 1 TO 4 CLOCK BUFFER FAN OUT BUFFER Package Outline and Package Dimensions (8-pin SOIC, 150 Mil. Narrow Body) Package dimensions are kept current with JEDEC Publication No. 95 Millimeters 8 Inches* Min Max Symbol Min Max E INDEX AREA H 12 D A 1.35 1.75 .0532 .0688 A1 0.10 0.25 .0040 .0098 B 0.33 0.51 .013 .020 C 0.19 0.25 .0075 .0098 D 4.80 5.00 .1890 .1968 E 3.80 4.00 .1497 .1574 e 1.27 BASIC 0.050 BASIC H 5.80 6.20 .2284 .2440 h 0.25 0.50 .010 .020 L 0.40 1.27 .016 .050 0 8 0 8 *For reference only. Controlling dimensions in mm. h x 45 C A A1 -Ce B SEATING PLANE L .10 (.004) C IDTTM / ICSTM LOW SKEW 1 TO 4 CLOCK BUFFER 7 ICS621 REV B 030907 ICS621 LOW SKEW 1 TO 4 CLOCK BUFFER FAN OUT BUFFER Ordering Information Part / Order Number ICS621MI ICS621MIT ICS621MILF ICS621MILFT ICS621M ICS621MT ICS621MLF ICS621MLFT ICS621NLFT ICS621NILFT Marking ICS621MI ICS621MI 621MILF 621MILF ICS621M ICS621M 621MLF 621MLF 621NLF 621NILF Shipping Packaging Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Tubes Tape and Reel Tape and Reel Tape and Reel Package 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin SOIC 8-pin DFN 8-pin DFN Temperature -40 to +85C -40 to +85C -40 to +85C -40 to +85C 0 to +70C 0 to +70C 0 to +70C 0 to +70C 0 to +70C -40 to +85C Parts that are ordered with a "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) 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. IDTTM / ICSTM LOW SKEW 1 TO 4 CLOCK BUFFER 8 ICS621 REV B 030907 ICS621 LOW SKEW 1 TO 4 CLOCK BUFFER FAN OUT BUFFER Revision History Rev. A B Originator S. Sharma S. Sharma Date 06/08/06 03/09/07 Description of Change New device/datasheet; Preliminary release. Removed Tape and Reel part number from DFN package ordering info. IDTTM / ICSTM LOW SKEW 1 TO 4 CLOCK BUFFER 9 ICS621 REV B 030907 ICS621 LOW SKEW 1 TO 4 CLOCK BUFFER FAN OUT BUFFER Innovate with IDT and accelerate your future networks. Contact: www.IDT.com For Sales 800-345-7015 408-284-8200 Fax: 408-284-2775 For Tech Support 408-284-4522 clockhelp@idt.com Corporate Headquarters Integrated Device Technology, Inc. www.idt.com (c) 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. Accelerated Thinking is a service mark of Integrated Device Technology, Inc. All other brands, product names and marks are or may be trademarks or registered trademarks used to identify products or services of their respective owners. Printed in USA |
Price & Availability of ICS621
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |