5V/3.3V 1:9 DIFFERENTIAL CLOCK DRIVER (w/o ENABLE) FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ DESCRIPTION 5V and 3.3V power supply options 200ps part-to-part skew 50ps output-to-output skew Differential design VBB output Voltage and temperature compensated outputs 75KΩ input pulldown resistors Fully compatible with Motorola MC100LVE111 Available in 28-pin PLCC package The SY10/100E111A/L are low skew 1-to-9 differential driver designed for clock distribution in mind. The SY10/ 100E111A/L's function and performance are similar to the popular SY10/100E111, with the improvement of lower jitter and the added feature of low voltage operation. It accepts one signal input, which can be either differential or single-ended if the VBB output is used. The signal is fanned out to 9 identical differential outputs. The E111A/L are specifically designed, modeled and produced with low skew as the key goal. Optimal design and layout serve to minimize gate to gate skew within a device, and empirical modeling is used to determine process control limits that ensure consistent tpd distributions from lot to lot. The net result is a dependable, guaranteed low skew device. To ensure that the tight skew specification is met it is necessary that both sides of the differential output are terminated into 50Ω, even if only one side is being used. In most applications, all nine differential pairs will be used and therefore terminated. In the case where fewer that nine pairs are used, it is necessary to terminate at least the output pairs on the same package side as the pair(s) being used on that side, in order to maintain minimum skew. Failure to do this will result in small degradations of propagation delay (on the order of 10-20ps) of the output(s) being used which, while not being catastrophic to most designs, will mean a loss of skew margin. The E111A/L, as with most other ECL devices, can be operated from a positive VCC supply in PECL mode. This allows the E111A/L to be used for high performance clock distribution in +5V/+3.3V systems. Designers can take advantage of the E111A/L's performance to distribute low skew clocks across the backplane or the board. In a PECL environment, series or Thevenin line terminations are typically used as they require no additional power supplies. For systems incorporating GTL, parallel termination offers the lowest power by taking advantage of the 1.2V supply as terminating voltage. BLOCK DIAGRAM Q0 Q0 Q1 Q1 Q2 Q2 Q3 Q3 IN Q4 IN Q4 Q5 Q5 Q6 Q6 Q7 Q7 Q8 VBB ClockWorks™ SY10E111A/L SY100E111A/L Q8 1 Rev.: F Amendment: /0 Rev. Date: October, 1998 ClockWorks™ SY10E111A/L SY100E111A/L Micrel PIN NAMES Q2 Q2 Pin Q1 Q1 VCCO Q0 Q0 PIN CONFIGURATION 25 24 23 22 21 20 19 VEE 26 18 Q3 NC IN VCC 27 17 Q3 Q4 VCCO IN VBB 2 NC 4 28 16 PLCC TOP VIEW J28-1 1 15 9 Q7 7 Q4 Q5 12 Q5 IN, IN Differential Input Pair Q0, Q0 — Q8, Q8 Differential Outputs VBB VBB Output VCCO VCC to Output 10 11 Q6 Q6 8 VCCO 6 Q8 Q8 Q7 5 13 14 3 Function ECL DC ELECTRICAL CHARACTERISTICS(1) VEE = VEE (Min.) to VEE (Max.); VCC = GND TA = –40°C Symbol VOH VOL VIH VIL VBB Parameter Min. TA = 0°C TA = +25°C TA = +85°C Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Output HIGH Voltage 10EL –1080 100EL –1085 — — –890 –880 –1020 –1025 — — –840 –880 –980 –1025 — — –810 –880 –910 –1025 — — –720 –880 Output LOW Voltage 10EL –1950 100EL –1830 — — –1650 –1950 –1550 –1810 — — –1630 –1950 –1620 –1810 — — –1630 –1950 –1620 –1810 — — –1595 –1620 Input HIGH Voltage 10EL –1230 100EL –1165 — — –890 –880 –1170 –1165 — — –840 –880 –1130 –1165 — — –810 –880 –1060 –1165 — — –720 –880 Input LOW Voltage 10EL –1950 100EL –1810 — — –1500 –1950 –1475 –1810 — — –1480 –1950 –1475 –1810 — — –1480 –1950 –1475 –1810 — — –1445 –1475 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 mV mV mV mV V IIH Input HIGH Current — — 150 — — 150 — — 150 — — 150 IIL Input LOW Current 10EL 100EL 0.5 0.5 — — — — 0.5 0.5 — — — — 0.5 0.5 — — — — 0.3 0.5 — — — — Power Supply Current 10EL 100EL 35 35 — — 65 65 35 35 — — 65 65 35 35 — — 65 65 35 35 — — 65 75 IEE NOTE: 1. Parametric values specified at: Unit µA µA mA 5 volt Power Supply Range 3 volt Power Supply Range 100E111A Series: 10E111A Series 10/100E111L Series: 2 -4.2V to -5.5V. -4.75V to -5.5V. -3.0V to -3.8V. ClockWorks™ SY10E111A/L SY100E111A/L Micrel 3.3V PECL DC ELECTRICAL CHARACTERISTICS(1) VCC = +3.0V to +3.8V, VEE = GND TA = –40°C Symbol VOH VOL Parameter Min. IIH IIL Input LOW Current IEE 10EL 100EL Power Supply Current 10EL 100EL VIH VIL VBB TA = +25°C TA = +85°C Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. — — 2110 2120 2280 2275 — — 2460 2420 2320 2275 — — 2490 2420 2390 2275 — — 2580 2420 1350 1470 — — 1650 1750 1350 1490 — — 1670 1680 1350 1490 — — 1670 1680 1350 1490 — — 1705 1680 2070 2135 — — 2410 2420 2130 2135 — — 2460 2420 2170 2135 — — 2490 2420 2240 2135 — — 2580 2420 1350 1490 — — 1800 1825 1350 1490 — — 1820 1825 1350 1490 — — 1820 1825 1350 1490 — — 1855 1825 1.87 1.92 — — — — 2.00 2.04 150 1.92 1.92 — — — — 2.03 2.04 150 1.95 1.92 — — — — 2.05 2.04 150 1.99 1.92 — — — — 2.11 2.04 150 Output HIGH Voltage(2) 10EL 2220 100EL 2215 Output LOW Voltage(2) 10EL 100EL Input HIGH Voltage(2) 10EL 100EL Input LOW Voltage(2) 10EL 100EL Output Reference Voltage(2) 10EL 100EL Input HIGH Current TA = 0°C Unit mV mV mV mV V µA µA 0.5 0.5 — — — — 0.5 0.5 — — — — 0.5 0.5 — — — — 0.3 0.5 — — — — — — — — 66 66 — — — — 66 66 — — — — 66 66 — — — — 66 78 mA NOTES: 1. Parametric values specified at: 3 volt Power Supply Range 10/100E111L Series: 2. These values are for VCC = 3.3V. Level specifications will vary 1:1 with VCC. +3.0V to +3.8V. 5V PECL DC ELECTRICAL CHARACTERISTICS(1) VCC = VCC (Min.) to VCC (Max.); VEE = GND TA = –40°C Symbol VOH Parameter IIH IIL Input LOW Current IEE 10EL 100EL Power Supply Current 10EL 100EL VIH VIL VBB TA = +25°C TA = +85°C Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. 3920 3915 — — 4110 4120 3980 3975 — — 4160 4120 4020 3975 — — 4190 4120 4090 3975 — — 4280 4120 3050 3170 — — 3350 3450 3050 3190 — — 3370 3380 3050 3190 — — 3370 3380 3050 3190 — — 3405 3380 3770 3835 — — 4110 4120 3830 3835 — — 4160 4120 3870 3835 — — 4190 4120 3940 3835 — — 4280 4120 3050 3190 — — 3500 3525 3050 3190 — — 3520 3525 3050 3190 — — 3520 3525 3050 3190 — — 3555 3525 3.57 3.62 — — — — 3.70 3.74 150 3.62 3.62 — — — — 3.73 3.74 150 3.65 3.62 — — — — 3.75 3.74 150 3.69 3.62 — — — — 3.81 3.74 150 (2) Output HIGH Voltage 10EL 100EL Output LOW Voltage(2) 10EL 100EL Input HIGH Voltage(2) 10EL 100EL Input LOW Voltage(2) 10EL 100EL Output Reference Voltage(2) 10EL 100EL Input HIGH Current VOL TA = 0°C NOTES: 1. Parametric values specified at: Unit mV mV mV mV V µA µA 0.5 0.5 — — — — 0.5 0.5 — — — — 0.5 0.5 — — — — 0.3 0.5 — — — — — — — — 66 66 — — — — 66 66 — — — — 66 66 — — — — 66 78 mA 5 volt Power Supply Range 2. These values are for VCC = 5V. Level specifications will vary 1:1 with VCC. 3 100E111A Series: 10E111A Series +4.2V to +5.5V. +4.75V to +5.5V. ClockWorks™ SY10E111A/L SY100E111A/L Micrel 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. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit 380 280 — — 680 780 430 330 — — 630 730 430 330 — — 630 730 430 330 — — 630 730 tPLH tPHL Propagation Delay to Output IN (differential)(2) IN (single-ended)(3) tskew Within-Device Skew(4) Part-to-Part Skew (Diff.) — — — — 75 250 — — — — 50 200 — — — — 50 200 — — — — 50 200 ps VPP Minimum Input Swing(5) 250 — — 250 — — 250 — — 250 — — mV –1.5 — –0.4 –1.5 — –0.4 –1.5 — –0.4 –1.5 — –0.4 V 200 — 650 200 — 600 200 — 600 200 — 600 ps VCMR Common Mode tr tf Rise/Fall Times 20% to 80% Range(6) NOTES: 1. Parametric values specified at: 2. 3. 4. 5. 6. ps 5 volt Power Supply Range 100E111A Series: -4.2V to -5.5V. 10E111A Series -4.75V to -5.5V. 3 volt Power Supply Range 10/100E111L Series: -3.0V to -3.8V. The differential propagation delay is defined as the delay from the crossing points of the differential input signals to the crossing point of the differential output signals. The single-ended propagation delay is defined as the delay from the 50% point of the input signal to the 50% point of the output signal. The within-device skew is defined as the worst case difference between any two similar delay paths within a single device. VPP (min) is defined as the minimum input differential voltage which will cause no increase in the propagation delay. The VPP (min) is AC limited for the E111A/L as a differential input as low as 50mV will still produce full ECL levels at the output. VCMR is defined as the range within the VIH level may vary, with the device still meeting the propagation delay specification. The VIL level must be such that the peak-to-peak voltage is less than 1.0V and greater than or equal to VPP (min). For PECL operation: VCMR (max) = VCC – |VCMR (max)| and VCMR (min) = VCC – |VCMR (min)| PRODUCT ORDERING CODE 5V 5V Package Type Operating Range VEE Range (V) Ordering Code SY10E111AJC J28-1 Commercial -4.75 to -5.5 SY10E111AJCTR J28-1 Commercial SY100E111AJC J28-1 SY100E111AJCTR J28-1 Ordering Code Package Type Operating Range VEE Range (V) SY10E111AJI J28-1 Industrial -4.75 to -5.5 -4.75 to -5.5 SY10E111AJITR J28-1 Industrial -4.75 to -5.5 Commercial -4.2 to -5.5 SY100E111AJI J28-1 Industrial -4.2 to -5.5 Commercial -4.2 to -5.5 SY100E111AJITR J28-1 Industrial -4.2 to -5.5 3.3V 3.3V SY10E111LJC J28-1 Commercial -3.0 to -3.8 SY10E111LJI J28-1 Industrial -3.0 to -3.8 SY10E111LJCTR J28-1 Commercial -3.0 to -3.8 SY10E111LJITR J28-1 Industrial -3.0 to -3.8 SY100E111LJC J28-1 Commercial -3.0 to -3.8 SY100E111LJI J28-1 Industrial -3.0 to -3.8 SY100E111LJCTR J28-1 Commercial -3.0 to -3.8 SY100E111LJITR J28-1 Industrial -3.0 to -3.8 4 ClockWorks™ SY10E111A/L SY100E111A/L Micrel 28 LEAD PLCC (J28-1) Rev. 03 MICREL-SYNERGY TEL 3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA + 1 (408) 980-9191 FAX + 1 (408) 914-7878 WEB http://www.micrel.com This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. © 2000 Micrel Incorporated 5