SY100S839VZC

NOT RECOMMENDED FOR NEW DESIGNS Micrel, Inc. ÷2/4, ÷4/5/6 CLOCK GENERATION CHIP Precision Edge® PrecisionSY100S839V Edge® SY100S839V FEATURES ■ ■ ■ ■ ■ ■ ■ 3.3V and 5V power supply option 50ps output-to-output skew 50% duty cycle outputs Synchronous enable/disable Master Reset for synchronization Internal 75KΩ input pull-down resistors Available in 20-pin SOIC package Precision Edge® DESCRIPTION The SY100S839V is a low skew ÷2/4, ÷4/5/6 clock generation chip 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 device can be driven by either a differential or single-ended ECL/LVECL or, if positive power supplies are used, PECL/LVPECL input signal. In addition, by using the VBB output, a sinusoidal source can be AC-coupled into the device. If a singleended 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 S839V 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. Upon start-up, the internal flip-flops will attain a random state; the master reset (MR) input must be asserted to ensure synchronization. For systems which only use one S839V, the MR pin need not be exercised as the internal divider designs ensures synchronization between the ÷2/4, and the ÷4/5/6 outputs of a single device. Precision Edge is a registered trademark of Micrel, Inc. M9999-032206 hbwhelp@micrel.com or (408) 955-1690 Rev.: B 1 Amendment: /0 Issue Date: March 2006 Precision Edge® SY100S839V Micrel, Inc. PACKAGE/ORDERING INFORMATION Ordering Information VCC 1 20 VCC Part Number Package Type Operating Range Package Marking Lead Finish /EN 2 19 Q0 DIVSELb0 3 18 /Q0 SY100S839VZC Z20-1 Commercial SY100S839VZC Sn-Pb CLK 4 17 Q1 SY100S839VZCTR(1) Z20-1 Commercial SY100S839VZC Sn-Pb /CLK 5 16 /Q1 SY100S839VZG(2) Z20-1 Industrial VBB 6 15 Q2 SY100S839VZG with Pb-Free bar-line indicator Pb-Free NiPdAu SY100S839VZGTR(1, 2) Z20-1 Industrial SY100S839VZG with Pb-Free bar-line indicator Pb-Free NiPdAu MR 7 14 /Q2 VCC 8 13 Q3 DIVSELb1 9 12 /Q3 DIVSELa 10 11 VEE Notes: 1. Tape and Reel. 2. Pb-Free package is recommended for new designs. 20-Pin SOIC (Z20-1) PIN NAMES TRUTH TABLE CLK /EN MR Function Z L L Divide CLK Differential Clock Inputs ZZ H L Hold Q0–3 /EN Synchronous Enable X X H Reset Q0–3 MR Master Reset VBB Reference Output Q0, Q1 Differential ÷2/4 Outputs Q2, Q3 Differential ÷4/5/6 Outputs DIVSEL Frequency Select Input Pin Note: Z = LOW-to-HIGH transition ZZ = HIGH-to-LOW transition DIVSELa Q0, Q1 OUTPUTS 0 Divide by 2 1 Divide by 4 DIVSELb1 DIVSELb0 Q2, Q3 OUTPUTS 0 0 Divide by 4 0 1 Divide by 6 1 0 Divide by 5 1 1 Divide by 5 M9999-032206 hbwhelp@micrel.com or (408) 955-1690 2 Function Precision Edge® SY100S839V Micrel, Inc. DC ELECTRICAL CHARACTERISTICS(1) VEE = VEE (min) to VEE (max); VCC = GND TA = –40°C Symbol Parameter TA = 0°C TA = +25°C TA = +85°C Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit — 50 95 — 50 95 — 50 95 — 54 95 mA –1.38 — –1.26 –1.38 — –1.26 –1.38 — –1.26 –1.38 — –1.26 V — — IEE Power Supply Current VBB Output Reference Voltage IIH Input High Current VOH Output HIGH Voltage(2) –1085 –1005 VOL 150 — — 150 — — 150 — — 150 µA –880 –1025 –955 –880 –1025 –955 –880 –1025 –955 –880 mV Output LOW Voltage(2) –1830 –1695 –1555 –1810 –1705 –1620 –1810 –1705 –1620 –1810 –1705 –1620 mV VOHA 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 0.5 — — — µA IIL Input LOW Current(4) — 0.5 — Note: 1. Parametric values specified at: -3.0V to -3.8V or -4.2V to -5.5V. 2. VIN = VIH(Max) or VIL(Min): Loading with 50Ω to –2.0V. 3. VIN = VIH(Min) or VIL(Max): Loading with 50Ω to –2.0V. 4. VIN = VIL(Min). M9999-032206 hbwhelp@micrel.com or (408) 955-1690 3 — 0.5 — — 0.5 Precision Edge® SY100S839V Micrel, Inc. AC ELECTRICAL CHARACTERISTICS(1) VEE = VEE (min) to VEE (max); VCC = GND TA = –40°C Symbol Parameter TA = 0°C TA = +25°C TA = +85°C Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit MHz fMAX Maximum Toggle Frequency 1000 — — 1000 — — 1000 — — 1000 — — tPD Propagation Delay to Output CLK ➝ Output (Diff.) CLK ➝ Output (S.E.) MR ➝ Output 725 675 600 — — — 925 975 900 725 675 600 — — — 925 975 900 725 675 610 — — — 925 975 910 725 675 630 — — — 925 975 930 Within-Device Skew(2) Q0 — Q3 — — 50 — — 50 — — 50 — — 50 Part-to-Part Q0 — Q3 (Diff.) — — 200 — — 200 — — 200 — — 200 tS Set-up Time /EN ➝ /CLK DIVSEL ➝ CLK 250 400 — — — — 250 400 — — — — 250 400 — — — — 250 400 — — — — ps tH Hold Time /CLK ➝ /EN CLK ➝ DIVSEL 100 150 — — — — 100 150 — — — — 100 150 — — — — 100 150 — — — — ps VPP Minimum Input Swing(3) 250 — — 250 — — 250 — — 250 — — mV -1.6 — -0.4 -1.7 — -0.4 -1.7 — -0.4 -1.7 — -0.4 V — — 100 — — 100 — — 100 — — 100 ps CLK MR 500 700 — — — — 500 700 — — — — 500 700 — — — — 500 700 — — — — ps Q 280 — 550 280 — 550 280 — 550 280 — 550 ps tskew VCMR Common Mode tRR Reset Recovery Time tPW Minimum Pulse Width tr Output Rise/Fall Times (20% —80%) tf CLK Range(4), (5) ps ps Notes: 1. Parametric values specified at: -3.0V to -3.8V or -4.2V to -5.5V. 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. 5. Duty Cycle: (Min. 48%; Max. 52%) } over temp. M9999-032206 hbwhelp@micrel.com or (408) 955-1690 4 Precision Edge® SY100S839V Micrel, Inc. LOGIC DIAGRAM DIVSELa (÷ 2/4) Q0 Q0 CLK R CLK Q1 Q1 EN (÷4/5/6) VBB R Q2 Q2 Q3 MR Q3 DIVSELb0 DIVSELb1 TIMING DIAGRAMS CLK Q (÷ 2) Q (÷ 4) Q (÷ 5) Q (÷ 6) M9999-032206 hbwhelp@micrel.com or (408) 955-1690 5 Precision Edge® SY100S839V 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. M9999-032206 hbwhelp@micrel.com or (408) 955-1690 6