SK10/100EL14W 1:5 Clock Distribution Chip HIGH-PERFORMANCE PRODUCTS Description Features The SK10/100EL14W is a 1:5 Clock Distribution Chip designed specifically for low skew clock distribution applications. This device is fully compatible with MC100EL14 and MC100LVEL14. • • • • • • • • • The device can be driven by either differential or singleended ECL/PECL input signals. The SK10/100EL14W provides a VBB output for either single-ended use or DC bias for AC coupling to the device. VBB is an output pin and should be used as a bias for the EL14W as its current sink/source capability is limited. Whenever used, VBB should be bypassed to VCC via a 0.01 µF capacitor. • • • The EL14W features a multiplexed clock input to allow for the distribution of a lower speed scan or test clock along with the high speed system clock. When LOW (or left open and pulled LOW by the input pulldown resistor) the SEL pin will select the differential clock input. The Common Enable pin (EN*) is synchronous so that the outputs will only be enabled/disabled when they are already in the LOW state. This avoids the chance of generating a runt clock pulse when the device is enabled/disabled as can happen with an asynchronous control. The internal flipflops are clocked on the falling edge of the input clock; therefore, all associated specification limits are referenced to the negative edge of the clock input. Extended Supply Voltage Range: (VEE = –5.5V to –3.0V, VCC = 0V) or (VCC = + 3.0V to +5.5V, VEE=0V) High Bandwidth Output Transition Max. 50 ps Output-to-Output Skew (Typ. 30 ps) VBB Output Synchronous Enable/Disable Multiplexed Clock Input 75 KΩ Internal Input Pulldown Resistors New Differential Input Common Mode Range Fully Compatible with MC100EL14 and MC100LVEL14 ESD Protection of >4000 V Industrial Temperature Range: –40oC to +85oC Available in 20-Pin SOIC (150 mils) Package Pin Descriptions Functional Block Diagram Pin Function CLK, CLK* Differential Clock Inputs SCLK Scan Clock Input EN* Sync Enable SEL Clock Select Input VBB Reference Output Voltage Q0-Q4, Q0*-Q4* Differential Clock Outputs Q0 1 20 VCC Q0* 2 19 EN* Q1 3 18 VCC CLK SCLK SEL EN* Q Q1* 4 17 NC L X L L L Q2 5 16 SCLK H X L L H Q2* 6 15 CLK X L H L L Q D 1 Function Table 0 Q3 7 14 CLK* X H H L H Q3* 8 13 VBB X X X H L* Q4 9 12 SEL Q4* 10 11 VEE Revision 1/February 12, 2001 * On next negative transition of CLK or SCLK 1 www.semtech.com SK10/100EL14W HIGH-PERFORMANCE PRODUCTS Package Information 20 Pin SOIC Package PIN Descriptions –A 11 –B P R x 45 ˚ 20 10 X M B M M 0.010 (0.25) D 20 X M T A S B S J F 0.010 (0.25) C –T G 18 X K SEATING PLANE Millimeters MILLIMETERS DIM MIN MAX A 1.35 1.75 A1 0.10 0.25 B 0.33 0.51 C 0.19 0.25 D 4.80 5.00 E 3.80 4.00 e NOTES: 1. Dimensions and tolerances per ANSI Y14.5M, 1982. 2. Controlling dimension: millimeter. 3. Dimensions A and B do not include mold protrusion. 4. Maximum mold protrusion 0.150 (0.006) per side. 5. Dimension D does not include Dambar protrusion. Allowable Dambar protrusion shall be 0.13 (0.005) total in excess of d dimension at maximum material condition. 1.27 BSC H 5.80 6.20 h 0.25 0.50 L 0.40 1.27 θ 0o 8o Revision 1/February 12, 2001 2 www.semtech.com SK10/100EL14W HIGH-PERFORMANCE PRODUCTS DC Characteristics SK10/100EL14W DC Electrical Characteristics (Notes 1, 2) (VCC – VEE = +3.0V to +5.5V ; VOUT loaded 50Ω to VCC – 2.0V) TA = –40oC TA = 0oC TA = +25oC TA = +85oC Symbol Characteristic Min Typ Max Min Typ Max Min Typ Max Min Typ Max Unit IEE Power Supply current 10EL 100EL 22 22 28 28 38 38 23 23 30 30 39 40 24 24 30 31 40 41 25 27 32 34 42 46 mA mA - 1.43 - 1.38 - 1.30 - 1.26 - 1.38 - 1.38 - 1.27 - 1.26 - 1.35 - 1.38 - 1.25 - 1.26 -1.31 -1.38 -1.19 -1.26 V V - 150 150 150 - 150 150 150 - 150 150 150 - 150 150 150 µA µA VBB IIN Output Reference Voltage3 10EL 100EL Input Current (Diff) (SE) AC Characteristics SK10/100EL14W AC Electrical Characteristics (VCC – VEE = +3.0V to +5.5V ; VOUT loaded 50Ω to VCC – 2.0V) TA = –40oC TA = 0oC TA = +25oC TA = +85oC Symbol Characteristic Min Max Min Max Min Max Min Max Unit tPLH tPHL Propagation Delay CLK to Q (Diff) CLK to Q (SE) SCLK to Q 630 555 520 755 710 765 650 570 550 785 740 780 660 580 570 805 760 790 695 605 620 860 815 830 Ps Ps Ps 200 50 ps ps tskew Par t-to-Par t Skew Within Device Skew4 tS Setup Time EN* 0 0 0 0 ps tH Hold Time EN* 0 0 0 0 ps VPP Minimum Input Swing CLK5 VCMR Common Mode Range6 VPP < 500 mV VPP > 500 mV tr , tf Output Rise/Fall Times (20% to 80%) Q0-Q4, Q0*-Q4* Revision 1/February 12, 2001 200 50 200 50 200 50 150 1000 150 1000 150 1000 150 1000 mV VEE+1.3 VEE+1.5 VCC-0.4 VCC-0.4 VEE+1.3 VEE+1.5 VCC-0.4 VCC-0.4 VEE+1.3 VEE+1.5 VCC-0.4 VCC-0.4 VEE+1.3 VEE+1.5 VCC-0.4 VCC-0.4 V V 205 355 215 370 220 380 240 410 ps 3 www.semtech.com SK10/100EL14W HIGH-PERFORMANCE PRODUCTS AC Characteristics (continued) Notes: 1. 10EL circuits are designed to meet the DC specifications shown in the table after thermal equilibrium has been established. The circuit is in a test socket or mounted on a printed circuit board and transverse airflow greater than 500 lfpm is maintained. Outputs are terminated through a 50Ω resistor to VCC –2.0V. 2. 100K circuits are designed to meet the DC specification shown in the table where transverse airflow greater than 500 lfpm is maintained. 3. Voltages are referenced to VCC = 0V. 4. Skews are specified for identical LOW-to-HIGH or HIGH-to-LOW transitions. 5. Minimum input swing for which AC parameters guaranteed. 6. CMR range is referenced to the most positive side of the differential input signal. Normal operation is obtained if the high level falls within the specified range and the peak-to-peak voltage lies between VPP(min) and 1V. The lower end of the CMR range varies 1:1 with VEE and is equal to VEE + 1.3V for VPP < 500 mV, and VEE + 1.5 for VPP > 500 mV. 7. For standard ECL DC specifications, refer to the ECL Logic Family Standard DC Specifications Data Sheet. 8. For part ordering descriptions, see HPP Part Ordering Information Data Sheet. Ordering Information Ordering Code Package ID Temperature Range SK10EL14WD 20-SOIC Industrial SK10EL14WDT 20-SOIC Industrial SK100EL14WD 20-SOIC Industrial SK100EL14WDT 20-SOIC Industrial SK10EL14WU Die SK100EL14WU Die Contact Information Division Headquarters 10021 Willow Creek Road San Diego, CA 92131 Phone: (858) 695-1808 FAX: (858) 695-2633 Revision 1/February 12, 2001 Semtech Corporation High-Performance Products Division 4 Marketing Group 1111 Comstock Street Santa Clara, CA 95054 Phone: (408) 566-8776 FAX: (408) 727-8994 www.semtech.com