SY10EL34/L SY100EL34/L 5V/3.3V ÷2, ÷4, ÷8 Clock Generation Chip Precision Edge® General Description The SY10/100EL34/L are low-skew ÷2, ÷4, ÷8 clock generation chips designed explicitly for low-skew clock generation applications. The internal dividers are synchronous to each other; therefore, the common output edges are all precisely aligned. The devices can be driven by either a differential or single-ended ECL or, if positive power supplies are used, PECL input signal. In addition, by using the VBB output, a sinusoidal source can be ACcoupled into the device. If a single-ended input is to be used, the VBB output should be connected to the CLK input and bypassed to ground via a 0.01µF capacitor. The VBB output is designed to act as the switching reference for the input of the EL34/L under single-ended input conditions. As a result, this pin can only source/ sink up to 0.5mA of current. The common enable ( EN ) is synchronous so that the internal dividers will only be enabled/disabled when the internal clock is already in the LOW state. This avoids any chance of generating a runt clock pulse on the internal clock when the device is enabled/disabled as can happen with an asynchronous control. An internal runt pulse could lead to losing synchronization between the internal divider stages. The internal enable flip-flop is clocked on the falling edge of the divider stages. The internal enable flipflop 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. Upon start-up, the internal flip-flops will attain a random state; the master reset (MR) input allows for the synchronization of the internal dividers, as well as for multiple EL34/Ls in a system. Data sheets and support documentation can be found on Micrel’s web site at: www.micrel.com. Precision Edge® Features • • • • • • 3.3V and 5V power supply options 50ps output-to-output skew Synchronous enable/disable Master Reset for synchronization Internal 75KΩ input pull-down resistors Available in 16-pin SOIC package Pin Description Pin Name Pin Function CLK Differential clock inputs. EN Synchronous enable. MR Master reset. VBB Reference output. Q0 Differential ÷2 outputs. Q1 Differential ÷4 outputs. Q2 Differential ÷8 outputs. Precision Edge is a registered trademark of Micrel, Inc. Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com December 2011 M9999-120611-I [email protected] or (408) 955-1690 Precision Edge® SY10EL34/L SY100EL34/L Micrel, Inc. Ordering Information Part Number Package Type Operating Range Package Marking Lead Finish SY10EL34LZG Z16-2 Industrial SY10EL34LZG with Pb-Free Bar Line Indicator Pb-Free NiPdAu SY10EL34LZGTR(2) Z16-2 Industrial SY10EL34LZG with Pb-Free Bar Line Indicator Pb-Free NiPdAu SY100EL34LZG Z16-2 Industrial SY100EL34LZG with Pb-Free Bar Line Indicator Pb-Free NiPdAu SY100EL34LZGTR(2) Z16-2 Industrial SY100EL34LZG with Pb-Free Bar Line Indicator Pb-Free NiPdAu SY10EL34ZG Z16-2 Industrial SY10EL34ZG with Pb-Free Bar Line Indicator Pb-Free NiPdAu SY10EL34ZGTR(2) Z16-2 Industrial SY10EL34ZG with Pb-Free Bar Line Indicator Pb-Free NiPdAu SY100EL34ZG Z16-2 Industrial SY100EL34ZG with Pb-Free Bar Line Indicator Pb-Free NiPdAu SY100EL34ZGTR(2) Z16-2 Industrial SY100EL34ZG with Pb-Free Bar Line Indicator Pb-Free NiPdAu Notes: 1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC electricals only. 2. Tape and reel. Pin Configuration 16-Pin Narrow SOIC (Z16-2) December 2011 3 M9999-120611-I [email protected] or (408) 955-1690 Precision Edge® SY10EL34/L SY100EL34/L Micrel, Inc. DC Electrical Characteristics(1) VEE = VEE (minimum) to VEE (maximum); VCC = GND. Symbol Parameter Min. Typ. Max. Units mA TA = −40°C Power Supply Current IEE 10EL − − 49 100EL − − 49 10EL −1.43 −1.30 100EL −1.38 −1.26 Output Reference Voltage VBB IIH V − − 150 µA 10EL − − 49 mA 100EL − − 49 10EL −1.38 −1.27 100EL −1.38 −1.26 Input High Current TA = 0°C Power Supply Current IEE Output Reference Voltage VBB IIH V − − 150 µA 10EL − − 49 mA 100EL − − 49 10EL −1.35 100EL −1.38 Input High Current TA = +25°C Power Supply Current IEE Output Reference Voltage VBB IIH −1.25 V −1.26 − − 150 µA 10EL − − 49 mA 100EL − − 54 10EL −1.31 −1.19 100EL −1.38 −1.26 Input High Current TA = +85°C Power Supply Current IEE Output Reference Voltage VBB IIH − Input High Current − 150 V µA Note: 1. Parametric values specified at: − 5V Power Supply Range: 100EL34 Series: −4.2V to −5.5V 10EL34 Series: −4.75V to −5.5V − 3V Power Supply Range: 10/100EL34L Series: −3.0V to −3.8V December 2011 4 M9999-120611-I [email protected] or (408) 955-1690 Precision Edge® SY10EL34/L SY100EL34/L Micrel, Inc. AC Electrical Characteristics(1) VEE = VEE (minimum) to VEE (maximum); VCC = GND. Symbol Parameter Min. Typ. Max. Units CLK 960 MR 650 1100 1200 ps 800 1010 − − 50 ps 400 − − ps 200 − − ps 250 − − mV −1.3 − −0.4 V 275 400 525 ps CLK 960 1100 1200 ps MR 650 800 1010 − − 50 ps 400 − − ps 200 − − ps TA = −40°C Propagation Delay to Output tPD tSKEW Within-Device Skew(2) tS Set-Up Time ( EN ) tH Hold Time ( EN ) VPP Minimum Input Swing (3) (4) VCMR Common-Mode Range tr tf Output Rise/Fall Times Q (20% − 80%) TA = 0°C Propagation Delay to Output tPD tSKEW Within-Device Skew(2) tS Set-Up Time ( EN ) tH Hold Time ( EN ) (3) VPP Minimum Input Swing VCMR Common-Mode Range(4) tr tf Output Rise/Fall Times 250 − − mV −1.4 − −0.4 V 275 400 525 ps CLK 960 1100 1200 ps MR 650 800 1010 − − 50 ps 400 − − ps 200 − − ps 250 − − mV −1.4 − −0.4 V 275 400 525 ps Q (20% − 80%) TA = +25°C Propagation Delay to Output tPD tSKEW Within-Device Skew(2) tS Set-Up Time ( EN ) tH Hold Time ( EN ) VPP Minimum Input Swing (3) (4) VCMR Common-Mode Range tr tf Output Rise/Fall Times Q (20% − 80%) December 2011 5 M9999-120611-I [email protected] or (408) 955-1690 Precision Edge® SY10EL34/L SY100EL34/L Micrel, Inc. AC Electrical Characteristics(1) (Continued) VEE = VEE (minimum) to VEE (maximum); VCC = GND. Symbol Parameter Min. Typ. Max. Units CLK 960 MR 650 1100 1200 ps 800 1010 TA = +85°C Propagation Delay to Output tPD tSKEW Within-Device Skew − − 50 ps tS Set-Up Time ( EN ) 400 − − ps tH Hold Time ( EN ) 200 − − ps 250 − − mV −1.4 − −0.4 V 275 400 525 ps VPP Minimum Input Swing (3) (4) VCMR Common-Mode Range tr tf Output Rise/Fall Times Q (20% − 80%) Notes: 1. 2. Parametric values specified at: − 5V Power Supply Range: 100EL34 Series: −4.2V to −5.5V 10EL34 Series: −4.75V to −5.5V − 3V Power Supply Range: 10/100EL34L Series: −3.0V to −3.8V Skew is measured between outputs under identical transitions. 3. Minimum input swing for which AC parameters are guaranteed. The device will function reliably with differential inputs down to 100mV. 4. The 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 minimum and 1V. The lower end of the CMR range varies 1:1 with VEE. The numbers in the specification table assume a nominal VEE = −3.3V. Note for PECL operation, the VCMR(MIN) will be fixed at 3.3V − IVCMR(MIN)I. Truth Table CLK EN MR Function Z L L Divide ZZ H L Hold Q0−2 X X H Reset Q0−2 Notes: Z = LOW-to-HIGH transition ZZ = HIGH-to-LOW transition December 2011 6 M9999-120611-I [email protected] or (408) 955-1690 Precision Edge® SY10EL34/L SY100EL34/L Micrel, Inc. Timing Diagram The EN signal will freeze the internal clocks to the flip-flops on the first falling edge of CLK after its assertion. The internal dividers will maintain their state during the internal clock freeze and will return to clocking once the internal clocks are unfrozen. The outputs will transition to their next states in the same manner, time and relationship as they would have had the EN signal not been asserted. December 2011 7 M9999-120611-I [email protected] or (408) 955-1690 Precision Edge® SY10EL34/L SY100EL34/L Micrel, Inc. Package Information 16-Pin .150” Wide SOIC (Z16-2) MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. 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 a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2006 Micrel, Incorporated. December 2011 8 M9999-120611-I [email protected] or (408) 955-1690