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| MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order Number: MC100ES6254/D Rev 1, 05/2002 2.5/3.3V Differential LVPECL 2x2 Clock Switch and Fanout Buffer The Motorola MC100ES6254 is a bipolar monolithic differential 2x2 clock switch and fanout buffer. Designed for most demanding clock distribution systems, the MC100ES6254 supports various applications that require to drive precisely aligned clock signals. The device is capable of driving and switching differential LVPECL signals. Using SiGe technology and a fully differential architecture, the device offers superior digitial signal characteristics and very low clock skew error. Target applications for this clock driver are high performance clock/data switching, clock distribution or data loopback in computing, networking and telecommunication systems. Features: * Fully differential architecture from input to all outputs MC100ES6254 2.5V/3.3V DIFFERENTIAL LVPECL 2x2 CLOCK SWITCH AND FANOUT BUFFER * * * * * * * SiGe technology supports near-zero output skew Supports DC to 3GHz operation1 of clock or data signals LVPECL compatible differential clock inputs and outputs LVCMOS compatible control inputs Single 3.3V or 2.5V supply 50 ps maximum device skew1 FA SUFFIX 32-LEAD LQFP PACKAGE CASE 873A Synchronous output enable eliminating output runt pulse generation and metastability * Standard 32 lead LQFP package * Industrial temperature range Functional Description MC100ES6254 is designed for very skew critical differential clock distribution systems and supports clock frequencies from DC up to 3.0 GHz. Typical applications for the MC100ES6254 are primary clock distribution, switching and loopback systems of high-performance computer, networking and telecommunication systems, as well as on-board clocking of OC-3, OC-12 and OC-48 speed communication systems. Primary purpose of the MC100ES6254 is high-speed clock switching applications. In addition, the MC100ES6254 can be configured as single 1:6 or dual 1:3 LVPECL fanout buffer for clock signals, or as loopback device in high-speed data applications. The MC100ES6254 can be operated from a 3.3V or 2.5V positive supply without the requirement of a negative supply line. 1. The device is functional up to 3 GHz and characterized up to 2.7 GHz. (c) Motorola, Inc. 2002 1 MC100ES6254 VCC Bank A CLK0 CLK0 0 1 QA0 QA0 QA1 QA1 QA2 QA2 VCC CLK1 CLK1 Bank B 0 1 QB0 QB0 QB1 QB1 QB2 QB2 SEL0 SEL1 OEA OEB Sync Figure 1. MC100ES6254 Logic Diagram CLK0 CLK0 SEL0 GND GND 18 OEA VCC 24 QA2 QA2 VCC QA1 QA1 VCC QA0 QA0 25 26 27 28 23 22 21 20 19 17 16 15 14 13 QB2 QB2 VCC QB1 QB1 VCC QB0 QB0 MC100ES6254 29 30 31 32 1 2 3 4 5 6 7 8 12 11 10 9 CLK1 CLK1 VCC GND SEL1 Figure 2. 32-Lead Package Pinout (Top View) MOTOROLA 2 GND OEB VCC VCC TIMING SOLUTIONS MC100ES6254 TABLE 1: PIN CONFIGURATION Pin CLK0, CLK0 CLK1, CLK1 OEA, OEB SEL0, SEL1 QA[0-2], QA[0-2] QB[0-2], QB[0-2] GND VCC I/O Input Input Input Input Output Supply Supply Type LVPECL LVPECL LVCMOS LVCMOS LVPECL GND VCC Differential reference clock signal input 0 Differential reference clock signal input 1 Output enable Clock switch select Differential clock outputs (banks A and B) Negative power supply Positive power supply. All VCC pins must be connected to the positive power supply for correct DC and AC operation Function TABLE 2: FUNCTION TABLE Control OEA Default 0 0 QA[0-2], Qx[0-2] are active. Deassertion of OE can be asynchronous to the reference clock without generation of output runt pulses QA[0-2], Qx[0-2] are active. Deassertion of OE can be asynchronous to the reference clock without generation of output runt pulses 1 QA[0-2] = L, QA[0-2] =H (outputs disabled). Assertion of OE can be asynchronous to the reference clock without generation of output runt pulses QA[0-2] = L, QA[0-2] =H (outputs disabled). Assertion of OE can be asynchronous to the reference clock without generation of output runt pulses OEB 0 SEL0, SEL1 00 See Table 3 TABLE 3: CLOCK SELECT CONTROL SEL0 0 0 1 1 SEL1 0 1 0 1 CLK0 routed to QA[0:2] and QB[0:2] --- QA[0:2] QB[0:2] CLK1 routed to --- QA[0:2] and QB[0:2] QB[0:2] QA[0:2] Application Mode 1:6 fanout of CLK0 1:6 fanout of CLK1 Dual 1:3 buffer Dual 1:3 buffer (crossed) TABLE 4: ABSOLUTE MAXIMUM RATINGSa Symbol VCC VIN VOUT IIN IOUT TS Supply Voltage DC Input Voltage DC Output Voltage DC Input Current DC Output Current Storage temperature -65 Characteristics Min -0.3 -0.3 -0.3 Max 3.6 VCC+0.3 VCC+0.3 20 50 125 Unit V V V mA mA C Condition a. Absolute maximum continuous ratings are those maximum values beyond which damage to the device may occur. Exposure to these conditions or conditions beyond those indicated may adversely affect device reliability. Functional operation at absolute-maximum-rated conditions is not implied. TIMING SOLUTIONS 3 MOTOROLA MC100ES6254 TABLE 5: GENERAL SPECIFICATIONS Symbol VTT MM HBM CDM LU CIN JA Thermal resistance junction to ambient JESD 51-3, single layer test board Characteristics Output termination voltage ESD Protection (Machine model) ESD Protection (Human body model) ESD Protection (Charged device model) Latch-up immunity 200 2000 1500 200 4.0 83.1 73.3 68.9 63.8 57.4 59.0 54.4 52.5 50.4 47.8 23.0 86.0 75.4 70.9 65.3 59.6 60.6 55.7 53.8 51.5 48.8 26.3 Min Typ VCC - 2a Max Unit V V V V mA pF C/W C/W C/W C/W C/W C/W C/W C/W C/W C/W C/W Inputs Natural convection 100 ft/min 200 ft/min 400 ft/min 800 ft/min Natural convection 100 ft/min 200 ft/min 400 ft/min 800 ft/min MIL-SPEC 883E Method 1012.1 Condition JESD 51-6, 2S2P multilayer test board JC Thermal resistance junction to case Operating junction temperatureb (continuous operation) MTBF = 9.1 years 110 C TFunc Functional temperature range TA=-40 TJ=+110 C a. Output termination voltage VTT = 0V for VCC=2.5V operation is supported but the power consumption of the device will increase. b. Operating junction temperature impacts device life time. Maximum continuous operating junction temperature should be selected according to the application life time requirements (See application note AN1545 and the application section in this datasheet for more information). The device AC and DC parameters are specified up to 110C junction temperature allowing the MC100ES6254 to be used in applications requiring industrial temperature range. It is recommended that users of the MC100ES6254 employ thermal modeling analysis to assist in applying the junction temperature specifications to their particular application. TABLE 6: DC CHARACTERISTICS (VCC = 3.3V 5% or 2.5V 5%, TJ = 0 to +110C) Symbol Characteristics Min Typ Max Unit Condition LVCMOS control inputs (OEA, OEB, SEL0, SEL1) VIL VIH IIN Input voltage low Input voltage high Input Currenta 2.0 100 0.8 V V A VIN = VCC or VIN = GND Differential operation Differential operation IOH = -30 mAd IOL = -5 mAe LVPECL clock inputs (CLK0, CLK0, CLK1, CLK1) VPP AC differential input voltageb VCMR VOH VOL Differential cross point voltagec LVPECL clock outputs (QA0-2, QA0-2, QB0-2, QB0-2) Output High Voltage Output Low Voltage VCC=3.3V5% VCC=2.5V5% 0.1 1.0 1.3 VCC-0.3 VCC-1.005 VCC-1.705 VCC-1.705 52 VCC-0.7 VCC-1.5 VCC-1.3 85 V V VCC-1.2 VCC-1.9 VCC-1.9 V V IGND a. b. c. d. e. Maximum Quiescent Supply Current without output termination current mA GND pin Input have internal pullup/pulldown resistors which affect the input current. VPP is the minimum differential input voltage swing required to maintain AC characteristic. VCMR (DC) is the crosspoint of the differential input signal. Functional operation is obtained when the crosspoint is within the VCMR (DC) range and the input swing lies within the VPP (DC) specification. Equivalent to a termination 50W to VTT. ICC calculation: ICC = (number of differential output pairs used) * (IOH + IOL) + IGND ICC = (number of differential output pairs used) * (VOH-VTT)BRload +(VOL-VTT)BRload) + IGND MOTOROLA 4 TIMING SOLUTIONS MC100ES6254 TABLE 7: AC CHARACTERISTICS (VCC = 3.3V 5% or 2.5V 5%, TJ = 0 to +110C)a Symbol VPP VCMR VO(P-P) Characteristics Differential input voltageb (peak-to-peak) Differential input crosspoint voltagec Differential output voltage (peak-to-peak) fO < 1.1 GHz fO < 2.5 GHz fO < 3.0 GHz Input Frequency Propagation delay CLK, 1 to QA[] or QB[] Output-to-output skew Output-to-output skew Output pulse skewe Output duty cycle Output cycle-to-cycle jitter Output Rise/Fall Time Output disable time (part-to-part) Min 0.3 1.2 0.45 0.35 0.20 0 485 360 0.7 0.55 0.35 3000d 610 50 250 60 tREF<100 MHz tREF<800 MHz (SEL0 SEL1) 0.05 2.5T + tPD 49.4 45.2 50.6 54.8 TBD 300 3.5T + tPD ps ns 20% to 80% T=CLK period Typ Max 1.3 VCC-0.3 Unit V V V V V MHz ps ps ps ps % % DCfref= 50% DCfref= 50% Differential Differential Differential Condition fCLK tPD tsk(O) tsk(PP) tSK(P) DCO tJIT(CC) tr, tf tPDLf tPLDg a. b. c. d. e. f. g. Output enable time 3T + tPD 4T + tPD ns T=CLK period AC characteristics apply for parallel output termination of 50 to VTT. VPP is the minimum differential input voltage swing required to maintain AC characteristics including tpd and device-to-device skew. VCMR (AC) is the crosspoint of the differential input signal. Normal AC operation is obtained when the crosspoint is within the VCMR (AC) range and the input swing lies within the VPP (AC) specification. Violation of VCMR (AC) or VPP (AC) impacts the device propagation delay, device and part-to-part skew. The MC100ES6254 is fully operational up to 3.0 GHz and is characterized up to 2.7 GHz. Output pulse skew is the absolute difference of the propagation delay times: | tPLH - tPHL |. Propagation delay OE deassertion to differential output disabled (differential low: true output low, complementary output high). Propagation delay OE assertion to output enabled (active). CLKX CLKX 50% OEX tPDL (OEX to Qx[]) tPLD (OEX to Qx[]) Outputs disabled Qx[] Qx[] Figure 3. MC100ES6254 output disable/enable timing Differential Pulse Generator Z = 50W ZO = 50 ZO = 50 RT = 50 VTT DUT MC100ES6254 RT = 50 VTT Figure 4. MC100ES6254 AC test reference TIMING SOLUTIONS 5 MOTOROLA MC100ES6254 APPLICATIONS INFORMATION Example Configurations 2x2 clock switch CLK0 CLK1 SEL0 SEL1 MC100ES6254 SEL0 SEL1 Switch configuration 0 0 1 1 0 1 0 1 CLK0 clocks system A and system B CLK1 clocks system A and system B CLK0 clocks system A and CLK1 clocks system B CLK1 clocks system B and CLK1 clocks system A System A 3 3 System B Understanding the junction temperature range of the MC100ES6254 To make the optimum use of high clock frequency and low skew capabilities of the MC100ES6254, the MC100ES6254 is specified, characterized and tested for the junction temperature range of TJ=0C to +110C. Because the exact thermal performance depends on the PCB type, design, thermal management and natural or forced air convection, the junction temperature provides an exact way to correlate the application specific conditions to the published performance data of this datasheet. The correlation of the junction temperature range to the application ambient temperature range and vice versa can be done by calculation: TJ = TA + Rthja Ptot Assuming a thermal resistance (junction to ambient) of 54.4 C/W (2s2p board, 200 ft/min airflow, see table 4) and a typical power consumption of 467 mW (all outputs terminated 50 ohms to VTT, VCC=3.3V, frequency independent), the junction temperature of the MC100ES6254 is approximately TA + 24.5 C, and the minimum ambient temperature in this example case calculates to -24.5 C (the maximum ambient temperature is 85.5 C. See Table 8). Exceeding the minimum junction temperature specification of the MC100ES6254 does not have a significant impact on the device functionality. However, the continuous use the MC100ES6254 at high ambient temperatures requires thermal management to not exceed the specified maximum junction temperature. Please see the application note AN1545 for a power consumption calculation guideline. Table 8: Ambient temperature ranges (Ptot = 467 mW) 1:6 Clock Fanout Buffer CLK0 CLK1 0 0 SEL0 SEL1 MC100ES6254 Loopback device System-Tx CLK0 SEL0 SEL1 System-Rx QB[] CLK1 Receiver QA[] Transmitter Rthja (2s2p board) Natural convection 59.0 C/W 100 ft/min 200 ft/min 400 ft/min 800 ft/min 54.4 C/W 52.5 C/W 50.4 C/W 47.8 C/W TA, mina -28 C -25 C -24.5 C -23.5 C -22 C TA, max 82 C 85 C 85.5 C 86.5 C 88 C MC100ES6254 SEL0 0 0 1 1 SEL1 Switch configuration 0 1 0 1 System loopback Line loopback Transmit / Receive operation System and line loopback a. The MC100ES6254 device function is guaranteed from TA=-40 C to TJ=110 C Maintaining Lowest Device Skew The MC100ES6254 guarantees low output-to-output bank skew of 50 ps and a part-to-part skew of max. 250 ps. To ensure low skew clock signals in the application, both outputs of any differential output pair need to be terminated identically, even if only one output is used. When fewer than all nine output pairs are used, identical termination of all output pairs within the output bank is recommended. If an entire output bank is not used, it is recommended to leave all of these outputs open and unterminated. This will reduce the device power consumption while maintaining minimum output skew. MOTOROLA 6 TIMING SOLUTIONS MC100ES6254 Power Supply Bypassing The MC100ES6254 is a mixed analog/digital product. The differential architecture of the MC100ES6254 supports low noise signal operation at high frequencies. In order to maintain its superior signal quality, all VCC pins should be bypassed by high-frequency ceramic capacitors connected to GND. If the spectral frequencies of the internally generated switching noise on the supply pins cross the series resonant point of an individual bypass capacitor, its overall impedance begins to look inductive and thus increases with increasing frequency. The parallel capacitor combination shown ensures that a low impedance path to ground exists for frequencies well above the noise bandwidth. VCC 33...100 nF 0.1 nF VCC MC100ES6254 Figure 5. VCC Power Supply Bypass TIMING SOLUTIONS 7 MOTOROLA MC100ES6254 OUTLINE DIMENSIONS FA SUFFIX LQFP PACKAGE CASE 873A-02 ISSUE A A A1 32 25 4X 0.20 (0.008) AB T-U Z 1 -T- B B1 8 -U- V P DETAIL Y 17 AE V1 AE DETAIL Y 9 -Z- 9 S1 S 4X 0.20 (0.008) AC T-U Z G -AB- SEATING PLANE DETAIL AD -AC- BASE METAL F 8X M_ R CE SECTION AE-AE X DETAIL AD MOTOROLA GAUGE PLANE 0.250 (0.010) H W K Q_ 8 EE EE EE EE N D 0.20 (0.008) M AC T-U Z 0.10 (0.004) AC NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: MILLIMETER. 3. DATUM PLANE -AB- IS LOCATED AT BOTTOM OF LEAD AND IS COINCIDENT WITH THE LEAD WHERE THE LEAD EXITS THE PLASTIC BODY AT THE BOTTOM OF THE PARTING LINE. 4. DATUMS -T-, -U-, AND -Z- TO BE DETERMINED AT DATUM PLANE -AB-. 5. DIMENSIONS S AND V TO BE DETERMINED AT SEATING PLANE -AC-. 6. DIMENSIONS A AND B DO NOT INCLUDE MOLD PROTRUSION. ALLOWABLE PROTRUSION IS 0.250 (0.010) PER SIDE. DIMENSIONS A AND B DO INCLUDE MOLD MISMATCH AND ARE DETERMINED AT DATUM PLANE -AB-. 7. DIMENSION D DOES NOT INCLUDE DAMBAR PROTRUSION. DAMBAR PROTRUSION SHALL NOT CAUSE THE D DIMENSION TO EXCEED 0.520 (0.020). 8. MINIMUM SOLDER PLATE THICKNESS SHALL BE 0.0076 (0.0003). 9. EXACT SHAPE OF EACH CORNER MAY VARY FROM DEPICTION. MILLIMETERS MIN MAX 7.000 BSC 3.500 BSC 7.000 BSC 3.500 BSC 1.400 1.600 0.300 0.450 1.350 1.450 0.300 0.400 0.800 BSC 0.050 0.150 0.090 0.200 0.500 0.700 12_ REF 0.090 0.160 0.400 BSC 1_ 5_ 0.150 0.250 9.000 BSC 4.500 BSC 9.000 BSC 4.500 BSC 0.200 REF 1.000 REF INCHES MIN MAX 0.276 BSC 0.138 BSC 0.276 BSC 0.138 BSC 0.055 0.063 0.012 0.018 0.053 0.057 0.012 0.016 0.031 BSC 0.002 0.006 0.004 0.008 0.020 0.028 12_ REF 0.004 0.006 0.016 BSC 1_ 5_ 0.006 0.010 0.354 BSC 0.177 BSC 0.354 BSC 0.177 BSC 0.008 REF 0.039 REF J DIM A A1 B B1 C D E F G H J K M N P Q R S S1 V V1 W X TIMING SOLUTIONS -T-, -U-, -Z- MC100ES6254 NOTES TIMING SOLUTIONS 9 MOTOROLA MC100ES6254 NOTES MOTOROLA 10 TIMING SOLUTIONS MC100ES6254 NOTES TIMING SOLUTIONS 11 MOTOROLA MC100ES6254 Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters which may be provided in Motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer. MOTOROLA and the logo are registered in the US Patent & Trademark Office. All other product or service names are the property of their respective owners. E Motorola, Inc. 2002. How to reach us: USA / EUROPE / Locations Not Listed: Motorola Literature Distribution; P.O. Box 5405, Denver, Colorado 80217. 1-303-675-2140 or 1-800-441-2447 JAPAN: Motorola Japan Ltd.; SPS, Technical Information Center, 3-20-1, Minami-Azabu. Minato-ku, Tokyo 106-8573 Japan. 81-3-3440-3569 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Centre, 2 Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong. 852-26668334 Technical Information Center: 1-800-521-6274 HOME PAGE: http://www.motorola.com/semiconductors/ MOTOROLA 12 MC100ES6254/D TIMING SOLUTIONS |
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