PRELIMINARY INFORMATION ICS671-03 3.3 Volt Zero Delay, Low Skew Buffer Description Features The ICS671-03 is a low phase noise, high speed PLL based, 8 output, low skew zero delay buffer. Based on ICS’s proprietary low jitter Phase Locked Loop (PLL) techniques, the device provides eight low skew outputs at speeds up to 133 MHz at 3.3 V. The outputs can be generated from the PLL (for zero delay), or directly from the input (for testing), and can be set to tri-state mode or to stop at a low level. For normal operation as a zero delay buffer, any output clock is tied to the FBIN pin. • Packaged in 16 pin narrow (150 mil) SOIC ICS manufactures the largest variety of clock generators and buffers, and is the largest clock supplier in the world. • 5 V tolerant FBIN and CLKIN pins • Clock outputs from 10 to 133 MHz • Zero input-output delay • Eight low-skew (<200 ps) outputs • Device-to-device skew <700 ps • Low jitter (<200 ps) • Full CMOS outputs with 25 mA output drive capability at TTL levels • Tri-state mode for board-level testing • Advanced, low power, sub-micron CMOS process • 3.3 V operating voltage • Industrial temperature range of -40 to 85 °C Block Diagram 2 S2, S1 Control Logic CLKA1 CLKA2 CLKA3 CLKIN CLKA4 FBIN Clock Synthesis PLL CLKB1 CLKB2 CLKB3 CLKB4 Feedback is shown from CLKB4 for illustration, but may come from any output. MDS 671-03 A 1 Revision 072501 Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126 • (408) 295-9800 tel • www.icst.com PRELIMINARY INFORMATION ICS671-03 3.3 Volt Zero Delay, Low Skew Buffer Pin Assignment CLKIN 1 16 FBIN CLKA1 2 15 CLKA4 CLKA2 3 14 CLKA3 VDD 4 13 VDD GND 5 12 GND CLKB1 6 11 CLKB4 CLKB2 7 10 CLKB3 S2 8 9 S1 16 pin narrow (150 mil) SOIC Output Clock Mode Select Table S2 S1 CLKA1:A4 CLKB1:B4 0 0 Tri-state (Note 1) Tri-state (Note 1) 0 1 Stopped Low Stopped Low 1 0 Running Running 1 1 Running Running Notes: 1. Outputs are in high impedance state with weak pulldowns. 2. Buffer mode only; not zero delay between input and output. A & B Source PLL none CLKIN (Note 2) PLL PLL Status ON OFF OFF ON Pin Descriptions Number Name 1 CLKIN 2, 3, 14, 15 CLKA1:A4 4, 13 VDD 5, 12 GND 6, 7, 10, 11 CLKB1:B4 8 S2 9 S1 16 FBIN Type I O P P O I I I Description Clock Input. (5 V tolerant) Clock Outputs A1:A4. See above table. Outputs have weak pulldown resistors. Power supply. Connect both pins to 3.3 V. Connect to ground. Clock Outputs B1:B4. See above table. Outputs have weak pulldown resistors. Select input 2. See table above. Internal pull-up. Select input 1. See table above. Internal pull-up. Feedback Input. Connect to any output under normal operation. (5 V tolerant) Key: I = Input; O = output; P = power supply connection. Outputs have a weak internal pull-down when in tri-state mode. External Components The ICS671-03 requires a minimum number of external components for proper operation. Decoupling capacitors of 0.01µF should be connected between VDD and GND on pins 4 and 5, and VDD and GND on pins 13 and 12, as close to the device as possible. A series termination resistor of 33 Ω may be used close to each clock output pin to reduce reflections. MDS 671-03 A 2 Revision 072501 Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126 • (408) 295-9800 tel • www.icst.com PRELIMINARY INFORMATION ICS671-03 3.3 Volt Zero Delay, Low Skew Buffer Electrical Specifications Parameter Conditions Minimum Typical Maximum ABSOLUTE MAXIMUM RATINGS (note 1) Supply voltage, VDD Referenced to GND -0.5 7 Inputs and Clock Outputs Referenced to GND -0.5 VDD+0.5 CLKIN and FBIN Inputs -0.5 5.5 Electrostatic Discharge MIL-STD-883 2000 Ambient Operating Temperature -40 85 Soldering Temperature Max of 10 seconds 260 Junction temperature 150 Storage temperature -65 150 DC CHARACTERISTICS (VDD = 3.3 V unless specified otherwise) Operating Voltage, VDD 3.00 3.60 Input High Voltage, VIH 2 Input Low Voltage, VIL 0.8 Output High Voltage, VOH IOH=-12 mA 2.4 Output Low Voltage, VOL IOL=12 mA 0.4 Output High Voltage, VOH, CMOS level IOH=-8mA VDD-0.4 Operating Supply Current, IDD (Note 2) No Load, S2=1, S1=1 70 Power Down Supply Current, IDD CLKIN=0, S2=0, S1=1 1.3 CLKIN=0 (Note 3) 1.3 Short Circuit Current Each output ±50 Input Capacitance S2, S1, FBIN 5 AC CHARACTERISTICS (VDD = 3.3 V unless specified otherwise) Input Clock Frequency See table on page 2 10 133 Output Clock Frequency See table on page 2 10 133 Output Clock Rise Time, CL=30pF 0.8 to 2.0V 1.5 Output Clock Fall Time, CL=30pF 2.0 to 0.8V 1.25 Output Clock Duty Cycle, VDD=3.3V At VDD/2 45 50 55 Device to Device Skew, equally loaded rising edges at VDD/2 700 Output to Output Skew, equally loaded rising edges at VDD/2 200 Input to Output Skew, FBIN to CLKA4, S1=1, S0 =1 (Note 2) rising edges at VDD/2 ±250 Maximum Absolute Jitter 130 Cycle to Cycle Jitter, 30pF loads 300 PLL Lock Time (Note 4) 1.0 Units V V V °C °C °C °C V V V V V V mA mA mA mA pF MHz MHz ns ns % ps ps ps ps ps ms Notes: 1. Stresses beyond those listed under Absolute Maximum Ratings could cause permanent damage to the device. Prolonged exposure to levels above the operating limits but below the Absolute Maximums may affect device reliability. 2. With CLKIN = 100 MHz, FBIN to CLKA4, all outputs at 100 MHz. 3. When there is no clock signal present at CLKIN, the ICS671-03 will enter a power down mode. The PLL is stopped and the outputs are tri-state. 4. With VDD at a steady state, and valid clocks at CLKIN and FBIN. MDS 671-03 A 3 Revision 072501 Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126 • (408) 295-9800 tel • www.icst.com PRELIMINARY INFORMATION ICS671-03 3.3 Volt Zero Delay, Low Skew Buffer Package Outline and Package Dimensions (For current dimensional specifications, see JEDEC Publication No. 95.) 16 pin SOIC narrow E Inches Symbol Min Max A 0.0532 0.0688 A1 0.0040 0.0098 B 0.0130 0.0200 C 0.0075 0.0098 D 0.3859 0.3937 E 0.1497 0.1574 e .050 BSC H 0.2284 0.2440 h 0.0099 0.0195 L 0.0160 0.0500 H INDEX AREA 1 2 h x 45° D A1 A C e Millimeters Min Max 1.35 1.75 0.10 0.24 0.33 0.51 0.19 0.24 9.80 10.00 3.80 4.00 1.27 BSC 5.80 6.20 0.25 0.50 0.41 1.27 B L Ordering Information Part/Order Number Marking Shipping packaging Package Temperature ICS671M-03I ICS671M-03I tubes 16 pin SOIC -40 to +85 °C ICS671M-03IT ICS671M-03I tape and reel 16 pin SOIC -40 to +85 °C While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Incorporated (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. MDS 671-03 A 4 Revision 072501 Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126 • (408) 295-9800 tel • www.icst.com