Precision Edge™ SY10EL15 SY100EL15 FINAL 1:4 CLOCK DISTRIBUTION FEATURES ■ ■ ■ ■ ■ 50ps output-to-output skew Synchronous enable/disable Multiplexed clock input 75KΩ internal input pull-down resistors Available in 16-pin SOIC package Precision Edge™ DESCRIPTION The SY10/100EL15 are low skew 1:4 clock distribution chips designed explicitly for low skew clock distribution applications. The device can be driven by either a differential or single-ended ECL or, if positive power supplies are used, PECL input signal. If a single-ended input is to be used the VBB output should be connected to the CLK input and bypassed to VCC via a 0.01µF capacitor. The VBB output is designed to act as the switching reference for the input of the EL15 under singleended input conditions, as a result this pin can only source/sink up to 0.5mA of current. The EL15 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 pull-down resistor) the SEL pin will select the differential clock input. The common enable (EN) is synchronous so that the outputs will only be enabled/disabled when they are already in the LOW state. This avoids any chance of generating a runt clock pulse when the device is enabled/ disabled as can happen with an asynchronous control. The internal flip flop is clocked on the falling edge of the input clock, therefore all associated specification limits are referenced to the negative edge of the clock input. PIN CONFIGURATION/BLOCK DIAGRAM VCC 16 EN SCLK CLK CLK VBB 15 14 13 1 12 11 SEL VEE 10 9 0 D Q 1 2 3 4 5 6 7 8 Q0 Q0 Q1 Q1 Q2 Q2 Q3 Q3 SOIC TOP VIEW PIN NAMES Pin TRUTH TABLE Function CLK SCLK SEL EN Q CLK Differential Clock Inputs L X L L L SCLK Synchronous Clock Input H X L L H EN Synchronous Enable X L H L L SEL Clock Select Input X H H L H VBB Reference Output X X X H L* Q0-3 Differential Clock Outputs * On next negative transition of CLK or SCLK Precision Edge is a trademark of Micrel, Inc. Rev.: G 1 Amendment: /0 Issue Date: February 2003 Precision Edge™ SY10EL15 SY100EL15 Micrel ABSOLUTE MAXIMUM RATINGS(1) Symbol Rating Value Unit VEE Power Supply (VCC = 0V) –8.0 to 0 VDC VI Input Voltage (VCC = 0V) 0 to –6.0 VDC IOUT Output Current –Continuous –Surge 50 100 mA TA Operating Temperature Range –40 to +85 °C VEE Operating Range(1),(2) –5.7 to –4.2 V NOTES: 1. Absolute maximum rating, beyond which, device life may be impaired, unless otherwise specified on an individual data sheet. 2. Parametric values specified at: 100EL15 Series: –4.2V to –5.5V. 10EL15 Series –4.75V to –5.5V. 10EL DC ELECTRICAL CHARACTERISTICS VEE = VEE (Min.) to VEE (Max.); VCC = GND(1) TA = –40°C Symbol Parameter TA = 0°C TA = +25°C TA = +85°C Min. Max. Min. Max. Min. Typ. Max. Min. Max. Unit VOH Output HIGH Voltage –1080 –890 –1020 –840 –980 — –810 –910 –720 mV VOL Output LOW Voltage –1950 –1650 –1950 –1630 –1950 — –1630 –1950 –1595 mV VIH Input HIGH Voltage –1230 –890 –1170 –840 –1130 — –810 –1060 –720 mV VIL Input LOW Voltage –1950 –1500 –1950 –1480 –1950 — –1480 –1950 –1445 mV IIH Input High Current — 150 — 150 — — 150 — 150 µA IIL Input LOW Current 0.5 — 0.5 — 0.5 — — 0.5 — µA IEE Power Supply Current — 35 — 35 — 25 35 — 38 mA VBB Output Reference Voltage –1.38 –1.26 –1.38 –1.26 –1.38 — –1.26 –1.38 –1.26 V NOTE: 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 500lfpm is maintained. Outputs are terminated through a 50Ω resistor to –2.0V except where otherwise specified on the individual data sheets. PRODUCT ORDERING CODE Ordering Code SY10EL15ZC SY10EL15ZCTR* SY100EL15ZC SY100EL15ZCTR* Package Type Operating Range Marking Code SY10EL15ZI(1) Z16-2 Industrial HEL15 HEL15 SY10EL15ZITR*(1) Z16-2 Industrial HEL15 XEL15 SY100EL15ZI(1) Z16-2 Industrial XEL15 XEL15 SY100EL15ZITR*(1) Z16-2 Industrial XEL15 Package Type Operating Range Marking Code Z16-2 Commercial HEL15 Z16-2 Z16-2 Z16-2 Commercial Commercial Commercial Ordering Code *Tape and Reel *Tape and Reel Note 1. Recommended for new designs. 2 Precision Edge™ SY10EL15 SY100EL15 Micrel 100EL DC ELECTRICAL CHARACTERISTICS VEE = VEE (Min.) to VEE (Max.); VCC = GND(1) TA = –40°C Symbol Parameter TA = 0°C TA = +25°C TA = +85°C Min. Max. Min. Max. Min. Typ. Max. Min. Max. Unit VOH Output HIGH Voltage(2) –1085 –880 –1025 –880 –1025 –955 –880 –1025 –880 mV VOL Output LOW Voltage(2) –1830 –1555 –1810 –1620 –1810 –1705 –1620 –1810 –1620 mV Output HIGH Voltage(3) –1095 — –1035 — –1035 — — –1035 — mV VOLA Output LOW Voltage(3) — –1555 — –1610 — — –1610 — –1610 mV VIH Input HIGH Voltage –1165 –880 –1165 –880 –1165 — –880 –1165 –880 mV VIL Input LOW Voltage –1810 –1475 –1810 –1475 –1810 — –1475 –1810 –1475 mV IIH Input High Current — 150 — 150 — — 150 — 150 µA 0.5 — 0.5 — 0.5 — — 0.5 — µA — 35 — 35 — 25 35 — 38 mA –1.38 –1.26 –1.38 –1.26 –1.38 — –1.26 –1.38 –1.26 V VOHA Current(4) IIL Input LOW IEE Power Supply Current VBB Output Reference Voltage NOTES: 1. This table replaces the three traditionally seen in ECL 100K data books. The same DC parameter values at VEE = –4.5V now apply across the full VEE range of –4.2V to –5.5V. Outputs are terminated through a 50Ω resistor to –2.0V except where otherwise specified on the individual data sheets. 2. VIN = VIH(Max) or VIL(Min). 3. VIN = VIH(Min) or VIL(Max). 4. VIN = VIL(Max). AC ELECTRICAL CHARACTERISTICS VEE = VEE (Min) to VEE (Max); VCC = GND TA = –40°C Symbol Parameter TA = 0°C TA = +25°C TA = +85°C Min. Max. Min. Max. Min. Typ. Max. Min. Max. Unit 460 410 410 660 710 710 470 420 420 670 720 720 470 420 420 — — — 670 720 720 500 450 470 700 750 750 — — 200 50 — — 200 50 — — — — 200 50 — — 200 50 ps tPLH tPHL Propagation Delay CLK to Q (Diff) CLK to Q (SE) SCLK to Q tskew Part-to-Part Skew(1) Within-Device Skew tS Setup Time EN 150 — 150 — 150 — — 150 — ps tH Hold Time EN 400 — 400 — 400 — — 400 — ps VPP Minimum Input Swing CLK 250 — 250 — 250 — — 250 — mV VCMR Common Mode Range CLK –2.0 –0.4 –2.0 –0.4 –2.0 — –0.4 –2.0 –0.4 V tr tf Output Rise/Fall Times Q (20% – 80%) — — 325 575 325 — 575 325 575 ps ps NOTE: 1. Skews are specified for identical LOW-to-HIGH or HIGH-to-LOW transitions. 3 Precision Edge™ SY10EL15 SY100EL15 Micrel 16 LEAD SOIC .150" WIDE (Z16-2) Rev. 02 MICREL, INC. TEL 1849 FORTUNE DRIVE SAN JOSE, CA 95131 + 1 (408) 944-0800 FAX + 1 (408) 944-0970 WEB USA http://www.micrel.com The information furnished by Micrel in this datasheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2003 Micrel, Incorporated. 4