PRELIMINARY INFORMATION ICS508 PECL to CMOS Converter Description Features The ICS508 is the most cost effective way to generate a high quality, high frequency CMOS clock output from a PECL clock input. • Packaged as 8 pin SOIC or die • Separate VDD supplies allow voltage translation • Clock frequency of 0 - 250 MHz • Duty cycle of 45/55 • Operating voltages of 2.375 to 5.5 V • Tri-state output for board level testing • 24 mA drive capability • Industrial temperature version available • Advanced, low power CMOS process The ICS508 has separate VDD supplies for the PECL input buffer and the output buffer allowing different voltages to be used. For example, the input clock could use a 3.3 V supply while the output operates from 2.5 V. The device has an Output Enable pin that tri-states the clock output when the OE pin is taken low. The ICS508 is a member of the ClockBlocks™ family of devices. Block Diagram VDDP PECLIN VDDC Output Buffer PECLIN GND OE CLK GND 1 Revision 012400 Printed 11/13/00 Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126•(408) 295-9800tel • www.icst.com MDS 508 C PRELIMINARY INFORMATION ICS508 PECL to CMOS Converter Pin Assignment VDDP 1 8 VDDC PECLIN 2 7 CLK PECLIN 3 6 GND GND 4 5 OE Pin Descriptions Number 1 2 3 4 5 6 7 8 Name VDDP PECLIN PECLIN GND OE GND CLK VDDC Type O I I P I P O P Description Connect to 3.3 V or 5 V. Supplies PECL input buffer. Complementary PECL clock input. PECL clock input. Connect to ground. Output enable. Tri-states CLK output when low. Internal pull-up to VDDC. Connect to ground. Clock output. Connect to 2.5 V, or 3.3 V or 5 V. Supplies output buffer and OE pin. Key: I = Input, O = output, P = power supply connection 2 Revision 012400 Printed 11/13/00 Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126•(408) 295-9800tel • www.icst.com MDS 508 C PRELIMINARY INFORMATION ICS508 PECL to CMOS Converter Electrical Specifications Parameter Conditions Minimum Typical Maximum Units ABSOLUTE MAXIMUM RATINGS (sttresses beyond these can permanentlly damage the device) Supply Voltage, VDDP and VDDC PECL Inputs Clock Output and OE Pin Ambient Operating Temperature Soldering Temperature Storage temperature Referenced to GND Referenced to GND Referenced to GND ICS508MI only Max of 10 seconds -0.5 -0.5 0 -40 -65 7 VDDP+0.5 VDDC+0.5 70 85 260 150 V V V °C °C °C °C 5.5 5.5 1 VDDP - 0.6 VDDP - 0.6 VDDC 0.8 V V V V V V V V V V V V V kΩ mA mA DC CHARACTERISTICS (VDDP = VD DDC = 3.3 V unless oth herwise noted) Operating Voltage, VDDP Operating Voltage, VDDC Peak to Peak Input Voltage, PECLIN Common Mode Range, PECLIN Common Mode Range, PECLIN Input High Voltage, VIH Input Low Voltage, VIL Output High Voltage, VOH Output High Voltage, VOL Output High Voltage, VOH Output High Voltage, VOL Output High Voltage, VOH Output High Voltage, VOL On-Chip Pull-up Resistor Operating Supply Current, IDDP Operating Supply Current, IDDC Note 1 Note 1 VDDP = 5 V VDDP = 3.3 V OE only 3 2.375 0.3 VDDP - 3.7 VDDP - 2.0 2 OE only VDDC = 5 V, IOH = -24 mA VDDC-0.4 VDDC = 5 V, IOL = 24 mA VDDC = 3.3 V, IOH = -18 mA 0.4 VDDC-0.4 VDDC = 3.3 V, IOL = 18 mA VDDC = 2.5 V, IOH = -8 mA 0.4 VDDC-0.4 VDDC = 2.5 V, IOL = 8 mA OE 100 MHz, no load 100 MHz, no load 0.4 250 1.5 8 Note 1: VDDP must alwa s be greater than or equal to VDDC. 3 Revision 012400 Printed 11/13/00 Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126•(408) 295-9800tel • www.icst.com MDS 508 C PRELIMINARY INFORMATION ICS508 PECL to CMOS Converter Electrical Specifications Parameter Conditions Minimum Typical Maximum Units 250 MHz ns ns ns ns ns ns ns ns ns ns ns ns ns % % % % % % % % % % % AC CHARACTERISTICS (VDDP = VD DDC = 3.3V unless oth herwise noteed) Input Frequency Output Clock Rise Time, 0.8 to 2 V 0 VDDC = 5 V 0.4 0.6 1 0.4 0.6 1 7 7 4 4.5 5.5 4.5 5.5 VDDC = 3.3 V VDDC = 2.5 V Output Clock Fall Time, 2 V to 0.8 V VDDC = 5 V VDDC = 3.3 V VDDC = 2.5 V Output Enable Time, OE high to ouput on Output Disable Time, OE low to tri-state Propagation Delay VDDP=5 V, VDDC=5 V VDDP=5 V, VDDC=3.3 V VDDP=5 V, VDDC=2.5 V VDDP=3.3 V, VDDC=3.3 V VDDP=3.3 V, VDDC=2.5 V Output Clock Duty Cycle, 0-100 MHz Output Clock Duty Cycle, 100-166 MHz Any VDD combination VDDP=5 V, VDDC=5 V VDDP=5 V, VDDC=3.3 V VDDP=5 V, VDDC=2.5 V VDDP=3.3 V, VDDC=3.3 V VDDP=3.3 V, VDDC=2.5 V Output Clock Duty Cycle, 166-250 MHz VDDP=5 V, VDDC=5 V VDDP=5 V, VDDC=3.3 V VDDP=5 V, VDDC=2.5 V VDDP=3.3 V, VDDC=3.3 V VDDP=3.3 V, VDDC=2.5 V 45 45 45 40 40 45 40 40 35 35 40 20 20 6 7 9 7 9 55 55 55 60 60 55 60 60 65 65 60 4 Revision 012400 Printed 11/13/00 Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126•(408) 295-9800tel • www.icst.com MDS 508 C PRELIMINARY INFORMATION ICS508 PECL to CMOS Converter External Components The ICS508 requires two 0.01µF decoupling capacitors to be connected between VDDP and GND and between VDDC and GND. They must be connected close to the ICS508 to minimize lead inductance. A 33 Ω series terminating resistor can be used next to the CLK pin. Package Outline and Package Dimensions (For current dimensional specifications, see JEDEC Publication No. 95.) 8 pin SOIC Symbol A A1 E INDEX AREA 1 2 h x 45° D A1 e B C B H C D E e H h L Inch hes Min Max 0.0532 0.0688 0.0040 0.0098 0.0130 0.0200 0.0075 0.0098 0.1890 0.1968 0.1497 0.1574 .050 BSSC 0.2284 0.2440 0.0099 0.0195 0.0160 0.0500 Millim meters Min Max 1.35 1.75 0.10 0.24 0.33 0.51 0.19 0.24 4.80 5.00 3.80 4.00 1.27 BSSC 5.80 6.20 0.25 0.50 0.41 1.27 A L Ordering Information Part/Order Number ICS508M ICS508MT ICS508MI ICS508MIT ICS508-DWF ICS508-DPK Marking ICS508M ICS508M ICS508I ICS508I - Package 8 pin SOIC 8 pin SOIC on tape and reel 8 pin SOIC 8 pin SOIC on tape and reel Die on uncut, probed wafers Tested die in waffle pack Temperature 0 to 70 °C 0 to 70 °C -40 to +85 °C -40 to +85 °C 0 to 70 °C 0 to 70 °C While the information presented herein has been checked for both accuracy and reliability, ICS 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 ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS product for use in life support devices or critical medical instruments. 5 Revision 012400 Printed 11/13/00 Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126•(408) 295-9800tel • www.icst.com MDS 508 C