SEMICONDUCTOR TECHNICAL DATA The MC10E411 is a low skew 1-to-9 differential driver, designed with clock distribution in mind. The MC10E411’s function and performance are similar to the popular MC10E111, with the added feature of 1.2V output swings. 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. • • • • • • • 1:9 DIFFERENTIAL ECL/PECL RAMBUS CLOCK BUFFER 200ps Part-to-Part Skew 50ps Output-to-Output Skew Differential Design VBB Output Voltage Compensated Outputs VEE Range of –4.5 to –5.5V 75kΩ Input Pulldown Resistors The output voltage swing of the E411 is larger than a standard ECL swing. The 1.2V output swings provide a signal which can be AC coupled into RAMBus compatible input loads. The larger output swings are produced by lowering the VOL of the device. With the exception of the lower VOL, the E411 is identical to the MC10E111. Note that the larger output swings eliminate the possibility of temperature compensated outputs, thus the E411 is only available in the 10E style of ECL. In FN SUFFIX PLASTIC PACKAGE addition, because the VOL is lower than standard ECL, the outputs cannot CASE 776-02 be terminated to –2.0V. This datasheet provides a few termination alternatives. The E411 is 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, 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 than 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 MC10E411, as with most other ECL devices, can be operated from a positive VCC supply in PECL mode. This allows the E411 to be used for high performance clock distribution in +5.0V systems. Designers can take advantage of the E411’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 more information on using PECL, designers should refer to Motorola Application Note AN1406/D. 11/95 Motorola, Inc. 1996 2–1 REV 1 MC10E411 Q0 Q0 Q1 VCCO Q1 Q2 Q2 25 24 23 20 19 22 21 VEE 26 18 Q3 NC 27 17 Q3 IN 28 16 Q4 15 VCCO PIN NAMES Pins Function IN, IN Q0, Q0–Q8, Q8 VBB Differential Input Pair Differential Outputs VBB Output VCC Pinout: 28-Lead PLCC (Top View) 1 IN 2 14 Q4 VBB 3 13 Q5 NC 4 12 Q5 LOGIC SYMBOL 5 6 7 Q8 Q8 Q7 8 9 VCCO Q7 10 11 Q6 Q6 TERMINATION ALTERNATIVES Q0 Q0 VCC Q1 Q1 Q2 Q2 RS = ZO RAMBus Load Q3 Q3 IN Q4 Q4 EN Q5 Q5 IN 300Ω VEE Q6 Q6 VCC Q7 Q7 VBB MOTOROLA ZO ZO Q8 Q8 * VOH and VOL levels will vary slightly from specification table 2–2 RL = ZO VCC – 2.4V ECLinPS and ECLinPS Lite DL140 — Rev 4 MC10E411 ECL DC CHARACTERISTICS 0°C Symbol Characteristic Min Typ 25°C 85°C Max Min Typ Max Min Max Unit VOH Output HIGH Voltage1 –1.020 –0.840 –0.980 –0.890 –0.810 –0.910 –0.720 V VOL Output LOW Voltage1 –2.420 –2.140 –2.380 –2.250 –2.110 –2.310 –2.020 V VIH Input HIGH Voltage –1.170 –0.840 –1.130 –0.810 –1.060 –0.720 V VIL Input LOW Voltage –1.950 –1.480 –1.950 –1.480 –1.950 –1.445 V VBB Output Reference Voltage –1.38 –1.27 –1.35 –1.25 –1.31 –1.19 V VEE Power Supply Voltage –4.5 –5.5 –4.5 –5.5 –4.5 –5.5 V IIH Input HIGH Current 150 µA IEE Power Supply Current 65 mA Max Unit 150 55 Typ 150 65 55 65 55 1. Measured with 300Ω to VEE output pulldown. PECL DC CHARACTERISTICS 0°C Symbol Characteristic VOH Output HIGH Voltage1,2 VOL Output LOW Voltage1,2 VIH Input HIGH Voltage1 VIL Input LOW Voltage1 VBB Output Reference Voltage1 VCC Power Supply Voltage IIH Input HIGH Current IEE Power Supply Current Min Typ 25°C 85°C Max Min Typ Max Min 3.98 4.16 4.02 4.11 4.19 4.09 4.28 V 2.58 2.86 2.62 2.75 2.89 2.69 2.98 V 3.83 4.16 3.87 4.19 3.94 4.28 V 3.05 3.52 3.05 3.52 3.05 3.56 V 3.62 3.73 3.65 3.75 3.69 3.81 V 4.5 5.5 4.5 5.5 4.5 5.5 V 150 µA 65 mA 150 55 65 Typ 150 55 65 55 1. These values are for VCC = 5.0V. Level Specifications will vary 1:1 with VCC. 2. Measured with 300Ω to VEE output pulldown. ECLinPS and ECLinPS Lite DL140 — Rev 4 2–3 MOTOROLA MC10E411 AC CHARACTERISTICS (VEE = VEE (min) to VEE (max); VCC = VCCO = GND) 0°C Symbol tPLH tPHL Characteristic Min Propagation Delay to Output IN (differential) IN (single-ended) EN to Q 400 350 450 Typ 25°C Max Min 600 650 850 430 380 450 Typ 85°C Max Min 630 680 850 500 450 450 Typ Max Unit Condition ps 700 750 850 Note 1. Note 2. ts Setup Time EN to IN 200 0 200 0 200 0 ps Note 3. tH Hold Time IN to EN 0 –200 0 –200 0 –200 ps Note 4. tR Release Time EN to IN 300 100 300 100 300 100 ps Note 5. ps Note 6. mV Note 7. tskew Within-Device Skew Part-to-Part Skew (Diff) 50 200 50 200 VPP Minimum Input Swing 250 VCMR Common Mode Range –1.6 –0.4 –1.6 –0.4 –1.6 –0.4 V Note 8. tr/tf Output Rise/Fall Time 275 600 275 600 275 600 ps 20%–80% 250 50 200 250 1. 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. 2. 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. 3. The setup time is the minimum time that EN must be asserted prior to the next transition of IN/IN to prevent an output response greater than ±75 mV to that IN/IN transition (see Figure 1). 4. The hold time is the minimum time that EN must remain asserted after a negative going IN or a positive going IN to prevent an output response greater than ±75 mV to that IN/IN transition (see Figure 2). 5. The release time is the minimum time that EN must be deasserted prior to the next IN/IN transition to ensure an output response that meets the specified IN to Q propagation delay and output transition times (see Figure 3). 6. The within-device skew is defined as the worst case difference between any two similar delay paths within a single device. 7. 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 E411 as a differential input as low as 50 mV will still produce full ECL levels at the output. 8. VCMR is defined as the range within which 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 1.0 V and greater than or equal to VPP(min). MOTOROLA 2–4 ECLinPS and ECLinPS Lite DL140 — Rev 4 MC10E411 OUTLINE DIMENSIONS FN SUFFIX PLASTIC PLCC PACKAGE CASE 776–02 ISSUE D 0.007 (0.180) B Y BRK -N- T L –M M U 0.007 (0.180) X G1 M S N T L –M S S N S D Z -L- -M- D W 28 V 1 C A 0.007 (0.180) M R 0.007 (0.180) M T L –M S T L –M S N S N S H S N S 0.007 (0.180) M T L –M N S S 0.004 (0.100) G J -T- K SEATING PLANE F VIEW S G1 T L –M S N 0.007 (0.180) M T L –M S N S VIEW S S NOTES: 1. DATUMS -L-, -M-, AND -N- DETERMINED WHERE TOP OF LEAD SHOULDER EXITS PLASTIC BODY AT MOLD PARTING LINE. 2. DIM G1, TRUE POSITION TO BE MEASURED AT DATUM -T-, SEATING PLANE. 3. DIM R AND U DO NOT INCLUDE MOLD FLASH. ALLOWABLE MOLD FLASH IS 0.010 (0.250) PER SIDE. 4. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 5. CONTROLLING DIMENSION: INCH. 6. THE PACKAGE TOP MAY BE SMALLER THAN THE PACKAGE BOTTOM BY UP TO 0.012 (0.300). DIMENSIONS R AND U ARE DETERMINED AT THE OUTERMOST EXTREMES OF THE PLASTIC BODY EXCLUSIVE OF MOLD FLASH, TIE BAR BURRS, GATE BURRS AND INTERLEAD FLASH, BUT INCLUDING ANY MISMATCH BETWEEN THE TOP AND BOTTOM OF THE PLASTIC BODY. 7. DIMENSION H DOES NOT INCLUDE DAMBAR PROTRUSION OR INTRUSION. THE DAMBAR PROTRUSION(S) SHALL NOT CAUSE THE H DIMENSION TO BE GREATER THAN 0.037 (0.940). THE DAMBAR INTRUSION(S) SHALL NOT CAUSE THE H DIMENSION TO BE SMALLER THAN 0.025 (0.635). ECLinPS and ECLinPS Lite DL140 — Rev 4 T L –M K1 E S S VIEW D-D Z 0.010 (0.250) 0.010 (0.250) 2–5 DIM A B C E F G H J K R U V W X Y Z G1 K1 INCHES MIN MAX 0.485 0.495 0.485 0.495 0.165 0.180 0.090 0.110 0.013 0.019 0.050 BSC 0.026 0.032 0.020 — 0.025 — 0.450 0.456 0.450 0.456 0.042 0.048 0.042 0.048 0.042 0.056 — 0.020 2° 10° 0.410 0.430 0.040 — MILLIMETERS MIN MAX 12.32 12.57 12.32 12.57 4.20 4.57 2.29 2.79 0.33 0.48 1.27 BSC 0.66 0.81 0.51 — 0.64 — 11.43 11.58 11.43 11.58 1.07 1.21 1.07 1.21 1.07 1.42 — 0.50 2° 10° 10.42 10.92 1.02 — MOTOROLA MC10E411 Motorola reserves the right to make changes without further notice to any products herein. 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