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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
1:9 Differential ECL/PECL RAMBus Clock Buffer
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.
MC10E411
* * * * * * *
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 75k Input Pulldown Resistors
1:9 DIFFERENTIAL ECL/PECL RAMBUS CLOCK BUFFER
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
(c) Motorola, Inc. 1996
2-1
REV 1
MC10E411
Q0 25 VEE NC 26 27 28 1 2 3 4 5 Q8 6 Q8 7 Q7 8 9 10 Q6 11 Q6 Q0 24 Q1 VCCO Q1 23 22 21 Q2 20 Q2 19 18 17 16 Q3 Q3 Q4 VCCO Q4 Q5 Q5
PIN NAMES
Pins IN, IN Q0, Q0-Q8, Q8 VBB Function Differential Input Pair Differential Outputs VBB Output IN VCC IN VBB NC
Pinout: 28-Lead PLCC (Top View)
15 14 13 12
VCCO Q7
LOGIC SYMBOL
Q0 Q0 Q1 Q1 Q2 Q2 Q3 Q3 IN IN Q4 Q4 Q5 Q5 Q6 Q6 Q7 Q7 Q8 Q8 VCC
TERMINATION ALTERNATIVES
RS = ZO
ZO RAMBus Load
300 VEE
EN
VCC
ZO RL = ZO VCC - 2.4V
VBB
* VOH and VOL levels will vary slightly from specification table
MOTOROLA
2-2
ECLinPS and ECLinPS Lite DL140 -- Rev 4
MC10E411
ECL DC CHARACTERISTICS
0C Symbol VOH VOL VIH VIL VBB VEE IIH IEE Characteristic Output HIGH Voltage1 Output LOW Voltage1 Input HIGH Voltage Input LOW Voltage Output Reference Voltage Power Supply Voltage Input HIGH Current Power Supply Current 55 Min -1.020 -2.420 -1.170 -1.950 -1.38 -4.5 Typ Max -0.840 -2.140 -0.840 -1.480 -1.27 -5.5 150 65 55 Min -0.980 -2.380 -1.130 -1.950 -1.35 -4.5 25C Typ -0.890 -2.250 Max -0.810 -2.110 -0.810 -1.480 -1.25 -5.5 150 65 55 Min -0.910 -2.310 -1.060 -1.950 -1.31 -4.5 85C Typ Max -0.720 -2.020 -0.720 -1.445 -1.19 -5.5 150 65 Unit V V V V V V A mA
1. Measured with 300 to VEE output pulldown.
PECL DC CHARACTERISTICS
0C Symbol VOH VOL VIH VIL VBB VCC IIH IEE Characteristic Output HIGH Voltage1,2 Output LOW Voltage1,2 Input HIGH Voltage1 Input LOW Voltage1 Output Reference Voltage1 Power Supply Voltage Input HIGH Current Power Supply Current 55 Min 3.98 2.58 3.83 3.05 3.62 4.5 Typ Max 4.16 2.86 4.16 3.52 3.73 5.5 150 65 55 Min 4.02 2.62 3.87 3.05 3.65 4.5 25C Typ 4.11 2.75 Max 4.19 2.89 4.19 3.52 3.75 5.5 150 65 55 Min 4.09 2.69 3.94 3.05 3.69 4.5 85C Typ Max 4.28 2.98 4.28 3.56 3.81 5.5 150 65 Unit V V V V V V A mA
1. These values are for VCC = 5.0V. Level Specifications will vary 1:1 with VCC. 2. Measured with 300 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)
0C Symbol tPLH tPHL Characteristic Propagation Delay to Output IN (differential) IN (single-ended) EN to Q Setup Time Hold Time Release Time EN to IN IN to EN EN to IN Min 400 350 450 200 0 300 0 -200 100 50 200 250 -1.6 275 -0.4 600 250 -1.6 275 -0.4 600 Typ Max 600 650 850 Min 430 380 450 200 0 300 0 -200 100 50 200 250 -1.6 275 -0.4 600 25C Typ Max 630 680 850 Min 500 450 450 200 0 300 0 -200 100 50 200 85C Typ Max 700 750 850 ps ps ps ps mV V ps Unit ps Note 1. Note 2. Note 3. Note 4. Note 5. Note 6. Note 7. Note 8. 20%-80% Condition
ts tH tR tskew VPP VCMR tr/tf
Within-Device Skew Part-to-Part Skew (Diff) Minimum Input Swing Common Mode Range Output Rise/Fall Time
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) U T L -M
M
B -NY BRK
M
S
N
S S
0.007 (0.180)
T L -M
N
S
D Z -L-M-
W
28 1
D X VIEW D-D G1 0.010 (0.250)
S
V
T L -M
S
N
S
A Z R
0.007 (0.180) 0.007 (0.180)
M
T L -M T L -M
S
N N
S
H
S
0.007 (0.180)
M
T L -M
S
N
S
M
S
C
E G G1 0.010 (0.250)
S
K1 0.004 (0.100) J -TSEATING PLANE
K F VIEW S 0.007 (0.180)
M
VIEW S T L -M
S
T L -M
S
N
S
N
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).
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 --
ECLinPS and ECLinPS Lite DL140 -- Rev 4
2-5
MOTOROLA
MC10E411
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MOTOROLA 2-6
*MC10E411/D*
MC10E411/D ECLinPS and ECLinPS Lite DL140 -- Rev 4

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