MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Triple ECL to PECL Translator
The MC100LVEL/EL90 is a triple ECL to PECL translator. The device receives either standard or low voltage differential ECL signals and translates them to either standard or low voltage differential PECL output signals. The LVEL device can handle the low voltage signals while the EL device is designed for the standard signals. It is possible to have low voltage signals on one side and standard signals on the other if the LVEL90 is used.
•500ps Propagation Delays
•Fully Differential Design
•Supports both Standard and Low Voltage Operation
•20±Lead SOIC Packaging
A VBB output is provided for interfacing with single ended ECL signals at the input. If a single ended input is to be used the VBB output should be connected to the D input. The active signal would then drive the D input. When used the VBB output should be bypassed to ground via a 0.01μF capacitor. The VBB output is designed to act as the switching reference for the EL90 under single ended input switching conditions, as a result this pin can only source/sink up to 0.5mA of current.
To accomplish the level translation the EL/LVEL90 requires three power rails. The VCC supply should be connected to the positive supply, and the VEE pin should be connected to the negative power supply. The GND pins as expected are connected to the system ground plain. Both VEE and VCC should be bypassed to ground via 0.01μF capacitors.
Under open input conditions, the D input will be biased at VEE/2 and the D input will be pulled to VEE. This condition will force the Q output to a LOW, ensuring stability.
Logic Diagram and Pinout: 20-Lead SOIC (Top View)
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VCC |
Q0 |
Q0 |
GND |
Q1 |
Q1 |
GND |
Q2 |
Q2 |
VCC |
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20 |
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19 |
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18 |
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17 |
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16 |
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15 |
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14 |
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13 |
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12 |
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11 |
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PECL |
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PECL |
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PECL |
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MC100LVEL90
MC100EL90
1
DW SUFFIX
PLASTIC SOIC PACKAGE
CASE 751D-04
PIN NAMES
Pins |
Function |
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Dn |
ECL Inputs |
Qn |
PECL Outputs |
VBB |
ECL Reference Voltage Output |
ECL |
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ECL |
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ECL |
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1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
VCC |
D0 |
D0 |
VBB |
D1 |
D1 |
VBB |
D2 |
D2 |
VEE |
7/95
Motorola, Inc. 1996 |
REV 1 |
MC100LVEL90 MC100EL90
ECL INPUT DC CHARACTERISTICS
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±40°C |
0°C |
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25°C |
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85°C |
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Symbol |
Characteristic |
Min |
Max |
Min |
Max |
Min |
Typ |
Max |
Min |
Max |
Unit |
Condition |
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VEE |
Power Supply |
EL90 |
±4.2 |
±5.5 |
±4.2 |
±5.5 |
±4.2 |
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±5.5 |
±4.2 |
±5.5 |
V |
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Voltage |
LVEL90 |
±3.0 |
±3.8 |
±3.0 |
±3.8 |
±3.0 |
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±3.8 |
±3.0 |
±3.8 |
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IIH |
Input HIGH Current |
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150 |
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150 |
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150 |
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150 |
μA |
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IIL |
Input LOW Current |
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0.5 |
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0.5 |
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0.5 |
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0.5 |
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μA |
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VPP |
Minimum Peak-to-Peak |
150 |
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150 |
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150 |
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150 |
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mV |
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Input1 |
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VIH |
Input HIGH Voltage |
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±1165 |
±880 |
±1165 |
±880 |
±1165 |
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±880 |
±1165 |
±880 |
V |
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VIL |
Input LOW Voltage |
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±1810 |
±1475 |
±1810 |
±1475 |
±1810 |
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±1475 |
±1810 |
±1475 |
V |
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VBB |
Reference Output |
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±1.38 |
±1.26 |
±1.38 |
±1.26 |
±1.38 |
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±1.26 |
±1.38 |
±1.26 |
V |
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IEE |
Power Supply Current |
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8.0 |
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8.0 |
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6.0 |
8.0 |
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8.0 |
mA |
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1. 150mV input guarantees full logic swing at the output.
LVPECL OUTPUT DC CHARACTERISTICS
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±40°C |
0°C |
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25°C |
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85°C |
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Symbol |
Characteristic |
Min |
Max |
Min |
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Max |
Min |
Typ |
Max |
Min |
Max |
Unit |
Condition |
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VCC |
Power Supply Voltage |
3.0 |
3.8 |
3.0 |
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3.8 |
3.0 |
3.3 |
3.8 |
3.0 |
3.8 |
V |
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VOH |
Output HIGH Voltage1 |
2.215 |
2.42 |
2.275 |
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2.42 |
2.275 |
2.35 |
2.42 |
2.275 |
2.42 |
V |
VCC = 3.3V |
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V |
Output LOW Voltage1 |
1.47 |
1.745 |
1.49 |
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1.68 |
1.49 |
1.60 |
1.68 |
1.49 |
1.68 |
V |
V |
CC |
= 3.3V |
OL |
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IGND |
Power Supply Current |
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24 |
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24 |
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20 |
24 |
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26 |
mA |
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1. Levels will vary 1:1 with VCC.
PECL OUTPUT DC CHARACTERISTICS
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±40°C |
0°C |
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25°C |
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85°C |
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Symbol |
Characteristic |
Min |
Max |
Min |
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Max |
Min |
Typ |
Max |
Min |
Max |
Unit |
Condition |
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VCC |
Power Supply Voltage |
4.75 |
5.25 |
4.75 |
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5.25 |
4.75 |
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5.25 |
4.75 |
5.25 |
V |
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V |
Output HIGH Voltage1 |
3.915 |
4.12 |
3.975 |
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4.12 |
3.975 |
4.05 |
4.12 |
3.975 |
4.12 |
V |
V |
CC |
= 5.0V |
OH |
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VOL |
Output LOW Voltage1 |
3.17 |
3.445 |
3.19 |
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3.38 |
3.19 |
3.30 |
3.38 |
3.19 |
3.38 |
V |
VCC = 5.0V |
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IGND |
Power Supply Current |
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24 |
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24 |
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20 |
24 |
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26 |
mA |
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1. Levels will vary 1:1 with VCC.
MOTOROLA |
4±2 |
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