SY100EL38LZC-TR

NOT RECOMMENDED FOR NEW DESIGNS Micrel, Inc. 5V/3.3V ÷2, ÷4/6 CLOCK GENERATION CHIP Precision Edge® SY10EL38/L Precision Edge® SY100EL38/L SY10EL38/L SY100EL38/L 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 Precision Edge® DESCRIPTION The SY10/100EL38/L are low skew ÷2, ÷4/6 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 V BB output is designed to act as the switching reference for the input of the EL38/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 input clock, therefore, all associated specification limits are referenced to the negative edge of the clock input. The Phase_Out output will go HIGH for one clock cycle whenever the ÷2 and the ÷4/6 outputs are both transitioning from a LOW to a HIGH. This output allows for clock synchronization within the system. 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 EL38/Ls in a system. ■ Available in 20-pin SOIC package Precision Edge is a registered trademark of Micrel, Inc. M9999-031006 hbwhelp@micrel.com or (408) 955-1690 Rev.: G 1 Amendment: /0 Issue Date: March 2006 Precision Edge® SY10EL38/L SY100EL38/L Micrel, Inc. PACKAGE/ORDERING INFORMATION Ordering Information(1) VCC 1 20 VCC /EN 2 19 Q0 Package Type Operating Range Package Marking Lead Finish SY10EL38LZC Z20-1 Commercial SY10EL38LZC Sn-Pb Part Number DIVSEL 3 18 /Q0 SY10EL38LZCTR(2) Z20-1 Commercial SY10EL38LZC Sn-Pb CLK 4 17 Q1 SY100EL38LZC Z20-1 Commercial SY100EL38LZC Sn-Pb /CLK 5 16 /Q1 SY100EL38LZCTR(2) Z20-1 Commercial SY100EL38LZC Sn-Pb VBB 6 15 Q2 SY10EL38LZI Z20-1 Industrial SY10EL38LZI Sn-Pb MR 7 14 /Q2 VCC 8 13 Q3 SY10EL38LZITR(2) Z20-1 Industrial SY10EL38LZI Sn-Pb PHASED_OUT 9 12 /Q3 SY100EL38LZI Z20-1 Industrial SY100EL38LZI Sn-Pb SY100EL38LZITR(2) Z20-1 Industrial SY100EL38LZI Sn-Pb SY10EL38LZG(3) Z20-1 Industrial SY10EL38LZG with Pb-Free Pb-Free bar-line indicator NiPdAu SY10EL38LZGTR(2, 3) Z20-1 Industrial SY10EL38LZG with Pb-Free Pb-Free bar-line indicator NiPdAu SY100EL38LZG(3) Z20-1 Industrial SY100EL38LZG with Pb-Free Pb-Free bar-line indicator NiPdAu SY100EL38LZGTR(2, 3) Z20-1 Industrial SY100EL38LZG with Pb-Free Pb-Free bar-line indicator NiPdAu /PHASED_OUT 10 20-Pin SOIC (Z20-1) 11 VEE Notes: 1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC Electricals only. 2. Tape and Reel. 3. Pb-Free package is recommended for new designs. M9999-031006 hbwhelp@micrel.com or (408) 955-1690 2 Precision Edge® SY10EL38/L SY100EL38/L Micrel, Inc. PIN NAMES TRUTH TABLE Pin Function CLK EN MR Function Z L L Divide CLK Differential Clock Inputs EN Synchronous Enable ZZ H L Hold Q0–3 MR Master Reset X X H Reset Q0–3 VBB Reference Output Q0, Q1 Differential ÷2 Outputs Q2, Q3 Differential ÷4/6 Outputs DIVSEL Frequency Select Input NOTE: Z = LOW-to-HIGH transition ZZ = HIGH-to-LOW transition DIVSEL Q2, Q3 OUTPUTS 0 Divide by 4 1 Divide by 6 DC ELECTRICAL CHARACTERISTICS(1) VEE = VEE (Min.) to VEE (Max.); VCC = GND TA = –40°C Symbol IEE VBB IIH TA = 0°C TA = +25°C TA = +85°C Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Power Supply Current 10EL 100EL 35 35 50 50 65 65 35 35 — — 65 65 35 35 — — 65 65 35 35 — — 65 75 Output Reference Voltage 10EL 100EL -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 — — 150 — — 150 — — 150 — — 150 Input High Current NOTE: 1. Parametric values specified at: mA V 5 volt Power Supply Range 3 volt Power Supply Range M9999-031006 hbwhelp@micrel.com or (408) 955-1690 Unit 100EL38 Series: 10EL38 Series 10/100EL38L Series: 3 -4.2V to -5.5V. -4.75V to -5.5V. -3.0V to -3.8V. µA Precision Edge® SY10EL38/L SY100EL38/L Micrel, Inc. AC ELECTRICAL CHARACTERISTICS(1) VEE = VEE (Min.) to VEE (Max.); VCC = GND TA = -40°C Symbol Parameter Min. TA = 0°C TA = +25°C Typ. Max. Min. Typ. Max. Min. Typ. Max. fMAX Maximum Toggle Frequency 1000 — — 1000 — — 1000 — tPD Propagation Delay to Output CLK ➝ Output (Diff.) CLK ➝ Output (S.E.) MR ➝ Output 950 900 600 — — — 1150 1200 900 950 900 600 — — — 1150 1200 900 970 920 600 — — — Within-Device Skew(2) Q0 — Q3 All — — — — 50 75 — — — — 50 75 — — — — 50 75 Part-to-Part Q0 — Q3 (Diff.) All — — — — 200 240 — — — — 200 240 — — — — tS Set-up Time EN ➝ CLK DIVSEL ➝ CLK 300 300 150 — — — — — 150 — — — — — tH Hold Time CLK ➝ EN CLK ➝ DIVSEL 400 400 150 200 — — 400 400 150 200 — — VPP Minimum Input Swing(3) 250 — — 250 — CLK –1.3 — –0.4 –1.4 — — 100 CLK MR 800 700 — — Q 280 — tskew Range(4) VCMR Common Mode tRR Reset Recovery Time tPW Minimum Pulse Width tr tf Output Rise/Fall Times (20% —80%) NOTES: 1. Parametric values specified at: CLK — TA = +85°C Min. Typ. Max. Unit 1000 — — MHz 1170 1050 1220 1000 900 600 — — — 1250 1300 900 — — — — 50 75 200 240 — — — — 200 240 150 — — — — — 150 — — — ps 400 400 150 200 — — 400 400 150 200 — — ps — 250 — — 250 — — mV — –0.4 –1.4 — –0.4 –1.4 — –0.4 V — — 100 — — 100 — — 100 ps — — 800 700 — — — — 800 700 — — — — 800 700 — — — — ps 550 280 — 550 280 — 550 280 — 550 ps ps 5 volt Power Supply Range 100EL38 Series: 10EL38 Series 10/100EL38L Series: -4.2V to -5.5V. -4.75V to -5.5V. -3.0V to -3.8V. ps 3 volt Power Supply Range 2. 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 min. and 1V. The lower end of the CMR range varies 1:1 with VEE. The numbers in the spec table assume a nominal VEE = –3.3V. Note for PECL operation, the VCMR (min) will be fixed at 3.3V – IVCMR (min)I. M9999-031006 hbwhelp@micrel.com or (408) 955-1690 4 Precision Edge® SY10EL38/L SY100EL38/L Micrel, Inc. LOGIC DIAGRAM (÷ 2) Q0 Q0 CLK R CLK Q1 Q1 EN R (÷ 4/6) R Q2 Q2 Q3 MR Q3 DIVSEL Phase Out Logic R TIMING DIAGRAMS CLK Q (÷ 2) Q (÷ 4) Q (÷ 6) Phase_Out(÷ 4) Phase_Out(÷ 6) M9999-031006 hbwhelp@micrel.com or (408) 955-1690 5 Phased_Out Phased_Out Precision Edge® SY10EL38/L SY100EL38/L Micrel, Inc. 20-PIN SOIC .300" WIDE (Z20-1) Rev. 03 MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 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. © 2006 Micrel, Incorporated. M9999-031006 hbwhelp@micrel.com or (408) 955-1690 6